Steel wire framework plastic composite pipe

Abstract

The utility model discloses a steel wire framework plastic composite pipe which comprises at least three plastic layers which are sequentially arranged from inside to outside, and a steel wire framework is arranged between every two adjacent plastic layers. In every two adjacent plastic layers, the outer side of the plastic layer on the inner side is provided with a plurality of grooves in the length direction, the grooves are evenly formed in the circumferential direction, the steel wire framework comprises a compression-resistant steel wire and a plurality of tensile steel wires, the outer diameter of each tensile steel wire is larger than the depth of the corresponding groove, the tensile steel wires are embedded into the grooves, and the compression-resistant steel wires are spirally wound on the outer sides of the tensile steel wires around the plastic layers. And in two inner and outer adjacent steel wire frameworks, the outer diameters of the tensile steel wires and the compression-resistant steel wires on the inner side are respectively greater than the outer diameters of the tensile steel wires and the compression-resistant steel wires on the outer side. According to the composite pipe, the steel wire framework is not prone to axial deformation, and the tensile strength of the composite pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of composite pipe technology, and in particular to a steel wire skeleton plastic composite pipe. Background Technology

[0002] In many industrial sectors and municipal engineering projects, such as chemical engineering and water supply and drainage, traditional metal pipes are prone to corrosion, affecting their service life and safety. Steel wire reinforced plastic composite pipes, with polyethylene and other plastics as the matrix, have excellent corrosion resistance, resisting the erosion of chemicals such as acids, alkalis, and salts, and also possess strong pressure resistance.

[0003] Existing steel wire reinforced plastic composite pipes, as shown in patent application number CN202011193397.2, include a plastic pipe, a first steel wire mesh, a second steel wire mesh, and a plastic layer arranged sequentially from the inside out. Although the above-mentioned composite pipe improves the pressure resistance performance through the first and second steel wire meshes, the first and second steel wire meshes cannot effectively improve the tensile strength of the composite pipe because the steel wire skeleton is a mesh structure and is prone to axial deformation. Utility Model Content

[0004] To address the drawback of existing composite pipes where the steel wire skeleton is prone to axial deformation, this invention proposes a composite pipe in which the steel wire skeleton is less prone to axial deformation, thereby improving the tensile strength of the composite pipe.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steel wire skeleton plastic composite pipe includes at least three plastic layers arranged sequentially from the inside to the outside, with a steel wire skeleton provided between adjacent plastic layers.

[0007] In two adjacent plastic layers, the outer side of the inner plastic layer is provided with a groove along the length direction. There are multiple grooves, which are evenly arranged circumferentially. The steel wire skeleton includes a compressive steel wire and multiple tensile steel wires. The outer diameter of the tensile steel wire is greater than the groove depth. The tensile steel wire is embedded in the groove. The compressive steel wire is spirally wound around the plastic layer on the outside of the tensile steel wire.

[0008] In two adjacent steel wire skeletons, the outer diameters of the inner tensile and compressive steel wires are larger than those of the outer tensile and compressive steel wires, respectively.

[0009] With the above setup, the tensile steel wire extends along the length of the composite pipe and can withstand tensile force to improve the tensile strength of the composite pipe; multiple steel wire skeletons are set to further improve the pressure resistance and tensile performance; grooves are set on the outside of the plastic layer to facilitate the laying of tensile steel wires, and pressure-resistant steel wires are wrapped around the outside of the tensile steel wires to fix the tensile steel wires in the grooves, which facilitates the extrusion of the plastic layer on the outside of the steel wire skeleton.

[0010] Furthermore, the bottom of the groove is curved, the opening of the groove is widened, and the inner side of the tensile steel wire fits into the bottom of the groove.

[0011] The above design facilitates the entry and filling of plastic into the groove, preventing gaps from forming within it.

[0012] Furthermore, the steel wire skeleton also includes a sensing wire, which includes an optical fiber sensor and an armor wrapped around the optical fiber sensor. The sensing wire is embedded in a groove, and the outer diameter of the sensing wire is equal to the outer diameter of the tensile steel wire.

[0013] The above settings facilitate the detection of temperature and vibration in the composite pipe.

[0014] Furthermore, in two adjacent steel wire skeletons, the spiral direction of the inner compressive steel wire is the same as that of the outer compressive steel wire.

[0015] Furthermore, an adhesive layer is provided between the plastic layer and the steel wire frame.

[0016] The above settings improve the adhesion between the plastic layer and the steel wire skeleton, preventing the steel wire skeleton from separating from the plastic layer.

[0017] Furthermore, the adhesive layer is made of modified bonding resin.

[0018] Furthermore, the plastic layer is made of HDPE.

[0019] Furthermore, the plastic layer is configured in three layers. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the composite pipe used in an embodiment.

[0021] Figure 2 for Figure 1 Enlarged view of point A.

[0022] Figure 3 for Figure 1 BB cross-sectional view. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0024] like Figures 1 to 3 A steel wire skeleton plastic composite pipe includes at least three plastic layers 3 arranged sequentially from the inside to the outside, and a steel wire skeleton is provided between two adjacent plastic layers 3.

[0025] In two adjacent plastic layers 3, the outer side of the inner plastic layer 3 is provided with a groove 5 along the length direction. There are multiple grooves 5, which are evenly arranged in the circumferential direction. The steel wire skeleton includes a compressive steel wire 6 and multiple tensile steel wires 7. The outer diameter of the tensile steel wire 7 is greater than the depth of the groove 5. The tensile steel wire 7 is embedded in the groove 5. The compressive steel wire 6 is spirally wound around the plastic layer 3 on the outer side of the tensile steel wire 7.

[0026] In the two adjacent steel wire skeletons, the outer diameters of the inner tensile steel wire 7 and the outer compressive steel wire 6 are larger than those of the outer tensile steel wire 7 and the outer compressive steel wire 6, respectively.

[0027] With the above setup, the tensile steel wire 7 extends along the length of the composite pipe and can withstand tensile force to improve the tensile strength of the composite pipe; multiple steel wire skeletons are set to further improve the pressure resistance and tensile performance; a groove 5 is set on the outside of the plastic layer 3 to facilitate the laying of the tensile steel wire 7, and a pressure-resistant steel wire 6 is wrapped around the outside of the tensile steel wire 7 to fix the tensile steel wire 7 in the groove 5, so as to facilitate the extrusion of the plastic layer 3 outside the steel wire skeleton.

[0028] Specifically, in the preparation of the composite pipe of this application, a plastic layer 3 is first extruded, and a steel wire skeleton is installed on the outside of the plastic layer 3. During installation, tensile steel wire 7 is first laid in the groove 5, and compressive steel wire 6 is wrapped around the outside of the tensile steel wire 7 to fix the tensile steel wire 7 in the groove 5. After the steel wire skeleton is installed, another layer of plastic layer 3 is extruded on the outside of the steel wire skeleton. The plastic of the plastic layer 3 is bonded to the inner plastic layer 3 through the compressive steel wire 6 and fills the groove 5 to further fix the tensile steel wire 7. This process is repeated to install the steel wire skeleton and extrude the plastic layer 3 until the outermost plastic layer 3 is extruded. The composite pipe of this application is suitable for For high-pressure liquid transportation, the pressure-resistant steel wire 6 can withstand radial force to improve the pressure resistance of the composite pipe; the tensile steel wire 7 is laid along the length direction to withstand tensile force, thereby reducing the axial deformation of the composite pipe and improving its tensile strength; among the two adjacent steel wire skeletons, the inner tensile steel wire 7 is thicker than the outer tensile steel wire 7, and the inner pressure-resistant steel wire 6 is thicker than the outer tensile steel wire 7, which facilitates the bending of the composite pipe. When the composite pipe is bent, the deformation of the steel wire skeleton closer to the composite pipe axis is small, while the deformation of the steel wire skeleton farther from the composite pipe axis is large. Therefore, the tensile steel wire 7 and the pressure-resistant steel wire 6 of the outer steel wire skeleton are made thinner to facilitate the bending of the composite pipe.

[0029] As one implementation method, the bottom of the groove 5 is an arc surface, the opening of the groove 5 is widened, and the inner side of the tensile steel wire 7 is in contact with the bottom of the groove 5.

[0030] The above settings facilitate the entry of plastic into and fills the groove 5, preventing gaps from forming in the groove 5.

[0031] As one implementation, the steel wire skeleton also includes a sensing wire 8, which includes an optical fiber sensor 81 and an armor 82 wrapped around the optical fiber sensor 81. The sensing wire 8 is embedded in the groove 5, and the outer diameter of the sensing wire 8 is equal to the outer diameter of the tensile steel wire 7.

[0032] The above settings facilitate the detection of temperature and vibration in the composite pipe.

[0033] Nine grooves 5 are provided circumferentially on the outer side of the plastic layer 3 of this application. Tensile steel wires 7 are laid in eight of the grooves 5, and sensing wires 8 are laid in one of the grooves 5. Armor 82 is used to protect the inner fiber optic sensor 81. After light signals are passed into the fiber optic sensor 81, the temperature and vibration of the composite tube can be measured to improve the safety of the composite tube.

[0034] As one implementation method, in two adjacent steel wire skeletons, the spiral direction of the inner compressive steel wire 6 is the same as that of the outer compressive steel wire 6.

[0035] As one implementation method, an adhesive layer (not shown in the figure) is provided between the plastic layer 3 and the steel wire skeleton.

[0036] The above settings improve the adhesion between the plastic layer 3 and the steel wire skeleton, preventing the steel wire skeleton from separating from the plastic layer 3.

[0037] Specifically, in the preparation of composite pipes, after extruding the plastic layer, glue is applied to the outside of the plastic layer, and then the steel wire skeleton is installed. After the glue cures, it forms an adhesive layer to improve the adhesion between the steel wire skeleton and the plastic layer.

[0038] As one implementation method, the adhesive layer is made of modified bonding resin.

[0039] As one implementation method, the plastic layer 3 is made of HDPE.

[0040] As one implementation method, the plastic layer 3 is configured with three layers.

[0041] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A steel wire reinforced plastic composite pipe, characterized in that, It includes at least three layers of plastic arranged sequentially from the inside out, with a steel wire skeleton between adjacent plastic layers; In two adjacent plastic layers, the outer side of the inner plastic layer is provided with a groove along the length direction. There are multiple grooves, which are evenly arranged circumferentially. The steel wire skeleton includes a compressive steel wire and multiple tensile steel wires. The outer diameter of the tensile steel wire is greater than the groove depth. The tensile steel wire is embedded in the groove. The compressive steel wire is spirally wound around the plastic layer on the outside of the tensile steel wire. In two adjacent steel wire skeletons, the outer diameters of the inner tensile and compressive steel wires are larger than those of the outer tensile and compressive steel wires, respectively.

2. The steel wire reinforced plastic composite pipe according to claim 1, characterized in that, The bottom of the groove is an arc surface, the opening of the groove is widened, and the inner side of the tensile steel wire is in contact with the bottom of the groove.

3. The steel wire reinforced plastic composite pipe according to claim 1, characterized in that, The steel wire skeleton also includes a sensing wire, which includes an optical fiber sensor and an armor wrapped around the optical fiber sensor. The sensing wire is embedded in a groove, and the outer diameter of the sensing wire is equal to the outer diameter of the tensile steel wire.

4. The steel wire reinforced plastic composite pipe according to claim 1, characterized in that, In the two adjacent steel wire skeletons, the spiral direction of the inner compressive steel wire is the same as that of the outer compressive steel wire.

5. The steel wire reinforced plastic composite pipe according to claim 1, characterized in that, An adhesive layer is provided between the plastic layer and the steel wire frame.

6. The steel wire reinforced plastic composite pipe according to claim 5, characterized in that, The adhesive layer is made of modified bonding resin.

7. The steel wire reinforced plastic composite pipe according to claim 1, characterized in that, The plastic layer is made of HDPE.

8. The steel wire reinforced plastic composite pipe according to claim 1, characterized in that, The plastic layer consists of three layers.

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