KR100317060B1 - Pressure-Resistant Hose Using Polyethylene Fabrics and Method for Forming the Same - Google Patents

Abstract

In the pressure resistant hose 12 according to the present invention, both ends of the widthwise ends of the first polyethylene interwoven fabric 48 coated with at least one watertight film 44 on at least one surface of both surfaces thereof are bonded to each other along the first adhesive part 40. A first hose layer 14 formed; And both ends of the second polyethylene interwoven fabric 50 coated with at least one watertight film 44 on at least one of the two surfaces is adhered to each other along the first adhesive part 40 or the second adhesive part 42, and an inner surface thereof is And at least one second hose layer 16 adhered to an outer surface of the first hose layer 14.

Description

Pressure-Resistant Hose Using Polyethylene Fabrics and Method for Forming the Same}

The present invention relates to an internal pressure hose using polyethylene interwoven fabric and a method for forming the same, and in particular, it is designed to be effectively used to eject a gas or a liquid at a high thickness while significantly reducing thickness, thereby reducing material cost, improving flexibility, and forming the same. Pressure-Resistant Hose Using Polyethylene Fabrics and Method for Forming the Same by Using Polyethylene Fabrics That Can Be Made in a Simple and Easy Way to Increase Productivity

Usually, a pressure resistant hose is used for conveying a high pressure liquid or gas to a predetermined place, and bending workability is required in addition to pressure resistance.

In order to satisfy these characteristics, the present inventor has proposed a structure of a multilayer tube included in a fibrous layer. The pressure resistant hose according to the prior art includes a first tube, a second tube, and a third tube. Rubber or PVC is generally used as the material of the tubes. The first fiber layer is bonded to the outer surface of the first tube, and the second tube is bonded to the outer surface of the first fiber layer. The second fiber layer is coupled to the outer surface of the second tube, and the third tube is coupled to the outer surface of the second fiber layer. The first fiber layer and the second fiber layer are used in the state of being braided to have a predetermined density. The inner surfaces of the first fibrous layer and the second fibrous layer are respectively joined to the outer surfaces of the first tube and the second tube by heating using heat or steam, ie, vapor heating. The second tube and the third tube are extruded to the outer surfaces of the first and second fiber layers, respectively, so as to be joined to the first and second fiber layers, respectively.

However, in the pressure-resistant hose according to the prior art structured as described above, since the first to third tubes are made of rubber or PVC, and the first fiber layer and the second fiber layer are interposed therebetween, There is a problem that the thickness is bound to reach a considerable degree and thus the material cost is increased, the flexibility is reduced, the molding is relatively complicated, the productivity is lowered.

The present invention has been made to solve the problems inherent in the pressure-resistant hose according to the prior art as described above, the object of the present invention is to be structured so that it can be effectively used to eject a high pressure gas or liquid while the thickness is significantly thinner The present invention provides a pressure resistant hose and a method of forming the same, using polyethylene polyethylene fabrics to reduce the cost of materials, improve flexibility, and make the molding simple and easy.

1 is a perspective view showing a schematic structure of an apparatus for forming a pressure resistant hose using a polyethylene teaching fabric according to the present invention.

2 is a side view illustrating a preferred embodiment of the molding process of the present invention.

3 is a cross-sectional view taken along line III-III of FIG. 2 showing a first hose layer primarily bonded by a molding apparatus according to the present invention.

4 is a cross-sectional view taken along line IV-IV of FIG. 2 showing a pressure resistant hose molded to have two hose layers by the molding apparatus according to the present invention.

Figure 5 is a partially enlarged perspective view independently showing the appearance of the pressure-resistant hose is molded in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

10: pressure resistant hose molding apparatus 12: pressure resistant hose

14: first hose layer 16: second hose layer

18: first supply roll 20: second supply roll

22: first guide member 24: second guide member

26: nozzle for applying the first adhesive 28: nozzle for applying the second adhesive

30: nozzle for application of third adhesive 32: roller for first compression

34: 2nd pressing roller 36: 3rd pressing roller

38: center pipe 40: first bonding portion

42: second bonding portion 44: watertight film

46: strip-shaped adhesive 48: first polyethylene interwoven fabric

50: second polyethylene teaching fabric

According to one aspect of the invention, there is provided a pressure resistant hose: the pressure resistant hose is formed by adhering both widthwise ends of a first polyethylene interwoven fabric coated with at least one watertight film on at least one of both sides along a first adhesive portion. A first hose layer; And at least one second hose layer formed by adhering both ends of the at least one watertight film-coated second polyethylene teaching material to each other along the first adhesive portion or the second adhesive portion, the inner surface of which is adhered to the outer surface of the first hose layer. It is characterized by including;

According to another aspect of the present invention, the first adhesive portion of the first hose layer and the second adhesive portion of the second hose layer are spaced along the circumferential direction of the pressure resistant hose so as not to overlap each other.

According to another aspect of the present invention, there is provided a method for forming a pressure resistant hose, the method comprising: passing a first polyethylene interwoven fabric coated with a watertight film on one or both surfaces through a first guide member and at both ends in the width direction thereof; Forming a circular cross-sectional shape by overlapping; Continuously applying an adhesive to the widthwise end of the first polyethylene interwoven fabric; Forming a first adhesive portion by guiding the first polyethylene interwoven fabric to surround the outer surface of the center pipe while adhering both widthwise ends of the first polyethylene interwoven fabric to each other; Continuously applying an adhesive to a plurality of points on the circumferential outer surface of the first polyethylene teaching material moving along the outer surface of the center pipe; Passing a second polyethylene teaching material coated with a watertight film on one or both surfaces through the second guide member so as to overlap both widthwise ends thereof to form a circular cross-sectional shape; Continuously applying an adhesive to the widthwise end of the second polyethylene interwoven fabric; Guiding the second polyethylene fabric to wrap around the outer surface of the first polyethylene fabric moving along the outer surface of the central pipe and adhering at multiple points on the circumferential outer surface to which the adhesive of the first polyethylene fabric is applied; And forming a second adhesive portion by adhering the widthwise end portions of the second polyethylene teaching material moving along the center pipe together with the first polyethylene teaching material to each other.

According to another aspect of the invention, the method further comprises the step of pressing the pressure-resistant hose using a pair of compression rollers in order to wind the pressure-resistant hose is completed in the winding roll.

According to another aspect of the present invention, the first guide member and the second guide member are spaced apart along the circumferential direction of the center pipe so that the first adhesive portion and the second adhesive portion do not overlap each other.

According to the above characteristics of the present invention, a pressure resistant hose is formed by using two or more layers of polyethylene interwoven fabrics in which watertight films are coated on one or both surfaces thereof, and both widthwise ends thereof are bonded to each other, thereby being used effectively in ejecting a high pressure liquid or gas. Compared to the pressure resistant hose having a plurality of rubber tube layers and a plurality of fiber layers according to the prior art, the thickness is significantly thinner, the material cost is reduced, and the bendability is improved, but the molding can be made in a simple and easy manner. Is increased.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention, the same reference numerals will be used for the same parts throughout the drawings.

Referring to Figure 1, there is shown a perspective view showing a schematic structure of a device for forming a pressure resistant hose using a polyethylene interwoven fabric according to the present invention, Figure 2 is a side view of a preferred form showing the molding process of the present invention 3 is a cross-sectional view taken along line III-III of FIG. 2 showing a first hose layer primarily bonded by a molding apparatus according to the present invention, and FIG. 4 to have two hose layers by the molding apparatus according to the present invention. It is sectional drawing IV-IV of FIG. 2 which shows the pressure-resistant hose shape | molded. And, Figure 5 shows a partially enlarged perspective view, respectively, independently showing the appearance of the pressure-resistant hose is completed in accordance with the present invention.

The pressure resistant hose 12 according to the invention comprises a first hose layer 14 and a second hose layer 16. The first hose layer 14 and the second hose layer 16 are formed using the first polyethylene interwoven fabric 48 and the second polyethylene interwoven fabric 50, respectively.

Watertight films 44 are coated on both surfaces of the first polyethylene fabric 48 and the second polyethylene fabric 50. The widthwise both ends of the first polyethylene interwoven fabric 48 and the widthwise both ends of the second polyethylene interwoven fabric 50 are bonded to each other to form a first adhesive portion 40 and a second adhesive portion 42.

The outer surface of the first hose layer 14 is firmly bonded to the inner surface of the second hose layer 16 to form a unity, whereby the first hose layer 14 and the second hose layer 16 play separately. There will be no. The first adhesive portion 40 of the first hose layer 14 and the second adhesive portion 42 of the second hose layer 16 are spaced apart along the circumferential direction of the pressure resistant hose 12 so as not to overlap each other. At the point where the first adhesive part 40 or the second adhesive part 42 is positioned, there is no fear that the strength, that is, the pressure resistance of the pressure-resistant hose 12 is lowered.

In the preferred embodiment of the present invention, the first adhesive portion 40 and the second adhesive portion 42 are spaced 180 degrees along the circumferential direction of the pressure resistant hose 12.

Hose forming apparatus 10 for pressure resistance according to the present invention includes a center pipe 38 extending in the vertical direction. Above the upper end of the center pipe 38, a first supply roll 18 for continuously supplying the first polyethylene interwoven fabric 48 coated with the watertight film 44 on both sides is disposed, and the first supply is provided. Below the furnace roll 18, the first guide member 22 is guided to form a generally circular cross-sectional shape by allowing the widthwise ends of the first polyethylene interwoven fabric 48 to be continuously supplied to overlap substantially. .

At this time, the 1st adhesive agent application nozzle 26 is located in the position near the overlapping part of the width direction both ends of the 1st polyethylene textile fabric 48. FIG. The first adhesive application nozzle 26 functions to continuously apply an adhesive onto the widthwise one end of the first polyethylene interwoven fabric 48. The first polyethylene interwoven fabric 48, which is guided to form a circular cross-sectional shape in the state where the adhesive is applied on one end in the width direction, is moved while wrapping the outer surface of the center pipe 38.

The first pressing roller 32 is disposed at a point close to the upper end of the center pipe 38, and the first pressing roller 32 has the central pipe 38 at both ends in the width direction of the first polyethylene interwoven fabric 48. The first adhesive part 40 is formed by pushing toward and adhering. Thus, formation of the first hose layer 14 is completed.

At a point corresponding generally to the middle portion of the center pipe 38, a second supply roll 20 for continuously supplying the second polyethylene teaching fabric 50 coated with the watertight film 44 on both sides is disposed.

A second adhesive application nozzle 28 is located at a point near the second supply roll 20, and the second adhesive application nozzle 28 is moved along the outer surface of the center pipe 38. The strip adhesive 46 is continuously applied along the longitudinal direction at a number of points on the outer surface of the layer 14.

Below the second supplying roll 20, the second guide member 24 is arranged to guide a generally circular cross-sectional shape by allowing the two end portions of the second polyethylene interwoven fabric 50 to be continuously supplied to overlap substantially in the width direction. . At this time, the 3rd adhesive agent application nozzle 30 is located in the position near the overlapping part of the width direction both ends of the 2nd polyethylene textile fabric 50. FIG. The third adhesive application nozzle 30 functions to continuously apply the adhesive on the widthwise end of the second polyethylene interwoven fabric 50.

A first hose which is guided along the outer surface of the center pipe 38 is guided to form a circular cross-sectional shape with a strip-shaped adhesive 46 applied in the longitudinal direction on one end in the width direction. The second hose layer 16 is adhered by a band-like adhesive 46 which is moved around the outer surface of the layer 14 and applied to a plurality of points on the outer surface of the first hose layer 14. A plurality of band-like adhesives 46 are formed on the inner contact surfaces of the first hose layer 14 and the second hose layer 16 in the longitudinal direction, so that these hose layers 14 and 16 are firmly coupled. It is to maintain the state.

A second pressing roller 34 is disposed below the second guide member 24, and the second pressing roller 34 has an outer surface of the center pipe 38 at both ends in the width direction of the second polyethylene cross-woven fabric 50. The second adhesive part 42 is formed by pushing and adhering toward the outer surface of the first hose layer 14 which is moved along. This completes the shaping of the pressure resistant hose 12 having the two hose layers 14, 16.

The third pressing roller 36 is aligned below the lower end of the center pipe 38, and the third pressing roller 36 compresses the pressure-resistant hose 12 for which the molding is completed to reduce the volume.

The pressure-resistant hose 12 whose volume is reduced is wound around a winding roll (not shown) disposed below the third pressing roller 36.

According to the above-described configuration of the present invention, the pressure resistant hose is formed by using two or more layers of polyethylene interwoven fabrics on which one or both surfaces are coated with watertight membranes, and both ends of the width direction are bonded to each other. It can be effectively used and compared with the pressure tube having a plurality of rubber tube layers and a plurality of fiber layers according to the prior art, the thickness is significantly thinner, the material cost is reduced, and the flexibility is improved, but the molding can be made in a simple and easy manner This increases productivity.

While the present invention has been illustrated and described with reference to certain preferred embodiments, the invention is not limited thereto but may vary without departing from the spirit or scope of the invention as set forth in the claims below. It will be readily apparent to those skilled in the art that such modifications and variations can be made in the art. For example, although the pressure resistant hose 12 has been described as having two hose layers 14 and 16 in the above embodiment of the present invention, it can be understood that the pressure resistant hose may be molded to have three or more hose layers.

Claims (6)

In the pressure resistant hose, A first hose layer formed by adhering both widthwise ends of the first polyethylene teaching material coated with at least one watertight film on at least one of the two surfaces along the first adhesive part; And At least one second hose layer formed by adhering both ends of at least one watertight film-coated second polyethylene teaching material on both sides along the first adhesive portion or the second adhesive portion, the inner surface of which is adhered to the outer surface of the first hose layer; Hose for pressure resistance comprising a. delete The pressure resistant hose according to claim 1, wherein a plurality of band-like adhesives are formed on the inner contact surfaces of the first hose layer and the second hose layer in the longitudinal direction. In the method for forming a pressure resistant hose, Passing the first polyethylene teaching material coated with a watertight film on one or both surfaces through the first guide member so as to overlap both widthwise ends thereof to form a circular cross-sectional shape; Continuously applying an adhesive to the widthwise end of the first polyethylene interwoven fabric; Forming a first adhesive portion by guiding the first polyethylene interwoven fabric to surround the outer surface of the center pipe while adhering both widthwise ends of the first polyethylene interwoven fabric to each other; Continuously applying an adhesive to a plurality of points on the circumferential outer surface of the first polyethylene teaching material moving along the outer surface of the center pipe; Passing a second polyethylene teaching material coated with a watertight film on one or both surfaces through the second guide member so as to overlap both widthwise ends thereof to form a circular cross-sectional shape; Continuously applying an adhesive to the widthwise end of the second polyethylene interwoven fabric; Guiding the second polyethylene fabric to wrap around the outer surface of the first polyethylene fabric moving along the outer surface of the central pipe and adhering at multiple points on the circumferential outer surface to which the adhesive of the first polyethylene fabric is applied; And Forming a second adhesive portion by adhering the widthwise end portions of the second polyethylene teaching material which are moved along the center pipe together with the first polyethylene teaching material to form a second adhesive portion. 5. The pressure resistant hose according to claim 4, further comprising: pressing the pressure resistant hose using a pair of compression rollers in order to wind the molded pressure resistant hose into the winding roll. Method for molding. The pressure resistant hose according to claim 4, wherein the first guide member and the second guide member are spaced apart along the circumferential direction of the center pipe so as not to overlap the first adhesive part and the second adhesive part. Method for Molding