A multi-layer steel wire wound modified polyethylene wear-resistant composite pipe

Abstract

A multi-layer steel wire wound modified polyethylene wear-resistant composite pipe, comprising: a core pipe, which is formed by hot-melt injection molding of modified polyethylene; a first hot-melt adhesive layer, which is fused to the outer peripheral surface of the core pipe to wrap the core pipe; a first steel wire winding support layer; which includes steel wires with an intersection angle of 73.5 degrees and impregnated resin steel wires, and they are formed by cross-winding; a second hot-melt adhesive layer, which is fused to the surface of the first steel wire winding support layer, and the first steel wire winding support layer is located between the first hot-melt adhesive layer and the second hot-melt adhesive layer; a second steel wire winding support layer; which includes steel wires with an intersection angle of 33.5 degrees and impregnated resin steel wires, and they are formed by cross-winding; a third hot-melt adhesive layer, which is fused to the surface of the second steel wire winding support layer, and the second steel wire winding support layer is located between the second hot-melt adhesive layer and the third hot-melt adhesive layer; an outer pipe, which is formed by hot-melt injection molding of modified polyethylene on the outer peripheral surface of the third hot-melt adhesive layer to form an integral body.

Description

Technical Field

[0001] The present invention relates to a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe. Background Art

[0002] China is a large country in pipeline layout. The power grid needs to use various conveying pipelines, and several types of steel skeleton plastic composite pipes have been developed successively: steel plate reinforced plastic composite pipes, punched steel strip skeleton composite pipes, wound steel wire mesh node skeleton composite pipes, and steel wire wound reinforced polyethylene composite pipes. Among them, the steel wire wound reinforced polyethylene composite pipe has high tensile strength, excellent toughness and crack resistance. However, traditional pipes are prone to deformation and have poor supporting ability, and the pipes need to be used in relatively harsh underground environments, with high requirements for moisture-proof, anti-corrosion, compressive resistance and anti-deformation.

[0003] Therefore, we have developed a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe, which is used for special purposes such as power pipelines and use in particularly harsh environments. It has a firm and simple structure, is easy to achieve mass production, effectively resists moisture, corrosion, compression and deformation, and has good water tightness and strength. Therefore, it is a pipe with excellent economic and technical performance.

[0005] To achieve the above object, the present invention provides a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe, comprising:

[0006] A core pipe, which is formed by hot melt injection molding of modified polyethylene;

[0007] A first hot melt adhesive layer, which is fused to the outer peripheral surface of the core pipe to wrap the core pipe;

[0008] A first steel wire winding support layer; it includes steel wires and impregnated resin steel wires with an intersection angle of 73.5 degrees, which are intertwined and formed;

[0009] A second hot melt adhesive layer, which is fused to the surface of the first steel wire winding support layer, and the first steel wire winding support layer is located between the first hot melt adhesive layer and the second hot melt adhesive layer;

[0010] A second steel wire winding support layer; it includes steel wires and impregnated resin steel wires with an intersection angle of 33.5 degrees, which are intertwined and formed;

[0011] A third hot melt adhesive layer, which is fused to the surface of the second steel wire winding support layer, and the second steel wire winding support layer is located between the second hot melt adhesive layer and the third hot melt adhesive layer;

[0012] An outer pipe, which is formed by hot-melt injection of modified polyethylene around the outer peripheral surface of the third hot-melt adhesive layer to form an integral body.

[0013] In one or more embodiments of the present invention, the diameter of the steel wire is between 1.3 mm and 1.45 mm, and the diameter of the impregnated resin steel wire is between 1.75 mm and 1.85 mm.

[0014] In one or more embodiments of the present invention, the thickness of the first hot-melt adhesive layer is less than one-tenth of the thickness of the core pipe; the thickness ratio of the first hot-melt adhesive layer, the second hot-melt adhesive layer and the third hot-melt adhesive layer is 100:125:138.

[0015] In one or more embodiments of the present invention, the core pipe and the outer pipe have a surface dense wear-resistant layer.

[0016] In one or more embodiments of the present invention, the thickness of the core pipe is more than 2.5 times the thickness of the outer pipe.

[0017] The effects of the present invention compared with the background technology are as follows:

[0018] Since the present invention adopts the above scheme, it is applicable to special uses such as power pipelines and use in particularly harsh environments. It has a firm and simple structure, is easy to achieve mass production, effectively resists moisture, corrosion, compression and deformation, and has good water tightness and strength. Therefore, it is a pipe with excellent economic and technical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The embodiments of the present invention will be described in detail below. The illustrated embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout.

[0021] The orientation shown in the drawings should not be construed as limiting the specific protection scope of the present invention. It is only for reference and understanding of the preferred embodiments, and changes in the position, increase in the number or simplification of the structure of the product components shown in the drawings are allowed.

[0022] The "connection" described in the specification and the "connection" relationship between the components shown in the drawings can be understood as fixedly connected, detachably connected, or integrally formed connections; it can be directly connected or connected through an intermediate medium. Those of ordinary skill in the art can understand the connection relationship and substitute different implementation manners in a suitable manner according to specific circumstances. For the orientations shown in the drawings, the components can be in direct contact or in contact through other features between them; for example, "above" can be directly above or obliquely above, or it only means higher than other objects; similar understandings can be made for other orientations.

[0023] The following will further describe the specific implementation manners of the present invention in conjunction with the drawings of the specification, making the technical solutions and their beneficial effects of the present invention clearer and more definite; and it is intended to explain the present invention and should not be construed as a limitation to the present invention.

[0024] Refer to Figure 1 As shown, the present invention preferably provides a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe, which includes a core pipe 1, a first hot melt adhesive layer 2, a first steel wire winding support layer 3, a second hot melt adhesive layer 4, a second steel wire winding support layer 5, a third hot melt adhesive layer 6, and an outer pipe 7; the core pipe 1 is first formed by a modified polyethylene hot melt injection pipe; the first hot melt adhesive layer 2 is fused to the outer peripheral surface of the core pipe 1 to wrap the core pipe; the first steel wire winding support layer 3 includes steel wires 31 with an intersection angle a of 73.5 degrees and impregnated resin steel wires 32, which are intertwined and formed;

[0025] The second hot melt adhesive layer 4 is fused to the surface of the first steel wire winding support layer 3, and the first steel wire winding support layer 3 is located between the first hot melt adhesive layer 2 and the second hot melt adhesive layer 4; the second steel wire winding support layer 5 includes steel wires 51 with an intersection angle b of 33.5 degrees and impregnated resin steel wires 52, which are intertwined and formed; the third hot melt adhesive layer 6 is fused to the surface of the second steel wire winding support layer 5, and the second steel wire winding support layer 5 is located between the second hot melt adhesive layer 4 and the third hot melt adhesive layer 6; the outer pipe 7 is a modified polyethylene hot melt injection pipe formed integrally on the outer peripheral surface of the third hot melt adhesive layer 6.

[0026] The thickness ratio of the core pipe 1 has sufficient supporting strength and will not deform. When under pressure, in the second steel wire winding support layer 5, steel wires 51 and resin-impregnated steel wires 52 with an intersection angle b of 33.5 degrees are formed. They distribute the force received to the steel wires 51 and resin-impregnated steel wires 52. When the angle is 33.5 degrees, the steel wire density and the dispersed force supporting strength are optimal. Of course, when the second steel wire winding support layer 5 is under force, it will transmit to the first steel wire winding support layer 3, forming steel wires 31 and resin-impregnated steel wires 32 with an intersection angle a of 73.5 degrees. The steel wire density at this angle is different from that of the first steel wire winding support layer 3, and the force is dispersed in different directions to prevent deformation and can reduce the material cost.

[0027] In order to increase the supporting force and improve the bearing capacity, in the embodiment, the diameter of the steel wire is between 1.3 mm and 1.45 mm, and the diameter of the resin-impregnated steel wire is between 1.75 mm and 1.85 mm. The thickness of the first hot melt adhesive layer 2 is less than one-tenth of the thickness of the core pipe 1; the thickness ratio of the first hot melt adhesive layer 2, the second hot melt adhesive layer 4, and the third hot melt adhesive layer 6 is 100:125:138. The first hot melt adhesive layer 2, the second hot melt adhesive layer 4, and the third hot melt adhesive layer 6 wrap the metal sandwich layer to prevent water and moisture. The core pipe 1 and the outer pipe 7 have a surface dense and wear-resistant layer to avoid surface damage during transportation and pipe laying construction; the thickness of the core pipe is more than 2.5 times the thickness of the outer pipe. The present invention relates to special uses such as power pipelines and use in particularly harsh environments. The structure is firm, simple, easy to achieve mass production, effectively moisture-proof, anti-corrosion, compressive, and anti-deformation, with good water tightness and strength. Therefore, it is a pipe material with excellent economic and technical performance.

[0028] Although the present invention has been described according to the above preferred embodiments, there may still be changes, substitutions, and equivalent solutions that fall within the scope of the present invention; there may also be multiple alternative ways to implement the present invention. Therefore, it is intended that the appended claims be interpreted to include all such changes, substitutions, and equivalent solutions that fall within the true spirit and scope of the present invention; those skilled in the art should understand that the present invention is not limited to the above specific embodiments, and the improvements and substitutions using the well-known technologies in the art based on the present invention all fall within the protection scope of the present invention, which should be defined by each claim.

Claims

1. A multi-layer steel wire wound modified polyethylene wear-resistant composite pipe, comprising: A core pipe, which is formed by hot-melt injection molding of modified polyethylene; A first hot-melt adhesive layer, which is fused to the outer peripheral surface of the core pipe to wrap the core pipe; A first steel wire winding support layer; which includes steel wires with an intersection angle of 73.5 degrees and resin-impregnated steel wires, and they are intertwined and formed; A second hot-melt adhesive layer, which is fused to the surface of the first steel wire winding support layer, and the first steel wire winding support layer is located between the first hot-melt adhesive layer and the second hot-melt adhesive layer; A second steel wire winding support layer; which includes steel wires with an intersection angle of 33.5 degrees and resin-impregnated steel wires, and they are intertwined and formed; A third hot-melt adhesive layer, which is fused to the surface of the second steel wire winding support layer, and the second steel wire winding support layer is located between the second hot-melt adhesive layer and the third hot-melt adhesive layer; An outer pipe, which is formed by hot-melt injection molding of modified polyethylene on the outer peripheral surface of the third hot-melt adhesive layer to form an integral body.

2. The multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 1, characterized in that: The diameter of the steel wire is between 1.3 mm and 1.45 mm, and the diameter of the resin-impregnated steel wire is between 1.75 mm and 1.85 mm.

3. The multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 2, wherein: The thickness of the first hot-melt adhesive layer is less than one-tenth of the thickness of the core pipe; the thickness ratio of the first hot-melt adhesive layer, the second hot-melt adhesive layer and the third hot-melt adhesive layer is 100:125:

138.

4. The multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 3, characterized in that: The core pipe and the outer pipe have a surface dense wear-resistant layer.

5. The multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 4, wherein: The thickness of the core pipe is more than 2.5 times the thickness of the outer pipe.

Images