Steel wire reinforced net pipe

Abstract

The utility model relates to the technical field of pipes, in particular to a steel wire reinforced net pipe which comprises a polyethylene inner layer, a steel wire resin composite layer and a polyethylene outer layer, the polyethylene inner layer is arranged on the inner side of the polyethylene outer layer, the polyethylene inner layer is attached to the polyethylene outer layer, and the steel wire resin composite layer is arranged inside the polyethylene outer layer. A plurality of steel wire complexes are wound between the polyethylene inner layer and the polyethylene outer layer in a crossed manner; the adhesive resin coating layer is coated on the outer surface of the steel wire; the steel wire is formed by spirally winding a plurality of strands of monofilaments, and the monofilaments are spiral. According to the steel wire mesh pipe, the situation that interfaces between layers are peeled off after long-time placement due to material property differences can be avoided, the layering phenomenon is reduced, and the problems that due to the material property differences of an existing steel wire mesh pipe, layering or bonding failure phenomena occur between the layers after the pipe is placed for a long time, the overall strength of the pipe is reduced, and the service life of the pipe is prolonged are solved. The reliability and the stability of the whole pipeline system are influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe material technical field, especially a steel wire reinforced net pipe. BACKGROUND

[0002] Steel wire mesh pipe is a kind of pipe material for water supply, steel wire mesh layer and plastic layer are tightly bonded together by high-performance adhesive resin, its structure generally includes polyethylene inner layer, adhesive resin layer, steel wire mesh layer, polyethylene outer layer. Steel wire is cross-wound in pipe material interior at certain angle to form steel wire mesh layer, uses high melt flow rate adhesive resin such as polyethylene modified resin as the material of adhesive resin layer, so it can guarantee to be fully infiltrated with steel wire mesh layer, and then make polyethylene inner layer and steel wire mesh layer firmly bonded.

[0003] But the mechanical strength of adhesive resin is lower than polyethylene, so adhesive resin layer is prone to cracking under external force, once adhesive resin layer cracks, the bonding between steel wire mesh layer and polyethylene inner layer will fail. And due to the difference in the properties of polyethylene, adhesive resin and steel wire, after experiencing long time heat, humidity and oxygen environment, three kinds of materials will expand, shrink and age to different degrees, so after long time storage of pipe material, delamination or bonding failure phenomenon will occur between layers, which leads to the decrease of the overall strength of pipe material, increases the risk of leakage, and further affects the reliability and stability of the whole pipeline system. SUMMARY

[0004] The utility model discloses a kind of steel wire reinforced net pipes, can avoid the interface between layer and layer peeling due to material property difference long time storage, reduce delamination phenomenon, guarantee the structural strength of the steel wire reinforced net pipe, improve its service life, solve the technical problem that the overall strength of pipe material is decreased, the reliability and stability of the whole pipeline system are affected due to the difference in the properties of polyethylene, adhesive resin and steel wire, pipe material long time storage, delamination or bonding failure phenomenon between layers.

[0005] To achieve the above object, the steel wire reinforced net pipe provided by the utility model, including polyethylene inner layer, steel wire resin composite layer and polyethylene outer layer, the polyethylene inner layer and the polyethylene outer layer are annular respectively, the polyethylene inner layer is arranged at the inner side of the polyethylene outer layer, and the polyethylene inner layer is attached to the polyethylene outer layer, the steel wire resin composite layer is arranged inside the polyethylene outer layer;

[0006] The steel wire resin composite layer is net-shaped, and the steel wire resin composite layer includes a plurality of steel wire composite bodies, the plurality of steel wire composite bodies are cross-wound between the polyethylene inner layer and the polyethylene outer layer, and the steel wire composite bodies are helically wound along the axis of the steel wire reinforced net pipe.

[0007] The steel wire composite includes steel wires and a bonding resin coating layer covering the outer surface of the steel wires;

[0008] The steel wires are spirally twisted by several strands of monofilaments, and the monofilaments are in a spiral shape.

[0009] Optionally, the steel wires are spirally twisted by two strands of the monofilaments or three strands of the monofilaments.

[0010] Optionally, the pitch of the two strands of the monofilaments or the three strands of the monofilaments is 8-12 times of the diameter of the monofilaments.

[0011] Optionally, the cross section of the steel wire composite is circular.

[0012] Optionally, the cross section of the steel wire composite is polygonal.

[0013] Optionally, the polygonal shape has 3-8 angles.

[0014] Optionally, the polyethylene inner layer and the polyethylene outer layer have the same structure.

[0015] Optionally, the winding angle of the steel wire composite is an angle of 45°-60° with the axis of the steel wire reinforced net tube.

[0016] Optionally, the end portions of the steel wire composites are connected by end-to-end overlapping.

[0017] Optionally, a plurality of net holes are formed between the plurality of steel wire composites that are cross-wound, and the plurality of net holes are uniformly distributed and have the same size.

[0018] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0019] 1. The steel wire reinforced net tube includes a polyethylene inner layer, a steel wire resin composite layer and a polyethylene outer layer, the steel wires are covered inside the steel wire composite by the bonding resin coating layer, the steel wire resin composite layer replaces the original bonding resin layer and the steel wire layer, since the steel wire resin composite layer is in a net shape and the bonding resin coating layer is also in a net shape, the contact area between the polyethylene inner layer and the polyethylene outer layer is greatly increased, and since the material properties of the polyethylene inner layer and the polyethylene outer layer are close, the polyethylene inner layer and the polyethylene outer layer are more likely to interact on the contact interface, and the two can be more closely fused, which can avoid the peeling at the interface between the layers after long-time placement due to the difference in material properties, reduce the delamination phenomenon, ensure the structural strength of the steel wire reinforced net tube and improve the service life of the steel wire reinforced net tube.

[0020] 2. The steel wire is spirally wound by a plurality of single filaments, the adhesive resin used for the adhesive resin coating layer can infiltrate the gap between the plurality of single filaments and form a three-dimensional crosslinking network with the surface of the steel wire, the steel wire and the adhesive resin coating layer are tightly combined, the overall strength and toughness of the steel wire composite are improved, and the steel wire is spirally wound by a plurality of single filaments, the surface area of the steel wire is increased, thereby increasing the contact area of the steel wire and the adhesive resin coating layer and improving the adhesion between the two, and finally the long-term pressure-bearing capacity of the steel wire reinforced net pipe is improved.

[0021] 3. By arranging the single filaments in a spiral shape, the single filaments are in a non-completely straightened state, so that the steel wire formed by the plurality of single filaments has greater deformation capacity along the axial direction of the steel wire, thereby improving the bendability of the pipe and being more conducive to the installation and construction of the pipe, and when the pipe is bent and deformed due to natural environmental factors such as terrain changes during the buried use, the steel wire reinforced net pipe can withstand a larger bending angle, effectively reducing the risk of pipe rupture due to bending.

[0022] 4. In addition, the steel wire reinforced net pipe replaces the original adhesive resin layer and steel wire layer with a steel wire resin composite layer, reduces the amount of adhesive resin, and can reduce the material cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a top view of the steel wire reinforced net pipe of an embodiment of the present application;

[0024] Figure 2 is Figure 1 is a local enlarged view of position A in figure 1;

[0025] Figure 3 is a structure schematic view of the steel wire resin composite layer of the steel wire reinforced net pipe of an embodiment of the present application;

[0026] Figure 4 is a structure schematic view of the double single filaments of the steel wire reinforced net pipe of an embodiment of the present application;

[0027] Figure 5 is a structure schematic view of the two steel wire composites of the steel wire reinforced net pipe of an embodiment of the present application;

[0028] Figure 6 is a cross-sectional schematic view of the steel wire composite of the steel wire reinforced net pipe of an embodiment of the present application;

[0029] Figure 7 is a cross-sectional schematic view of the steel wire composite of the steel wire reinforced net pipe of another embodiment of the present application.

[0030] Wherein: 1, polyethylene inner layer; 2, steel wire resin composite layer; 21, steel wire composite; 211, steel wire; 2111, single wire; 212, adhesive resin coating layer; 22, mesh; 3, polyethylene outer layer. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions, for example, "A and / or B" includes A solution, or B solution, or A and B solutions at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0035] The present application provides a steel wire reinforced mesh pipe.

[0036] In the embodiments of the present application, for example, Figures 1 to 3As shown, the steel wire reinforced net pipe comprises a polyethylene inner layer 1, a steel wire resin composite layer 2 and a polyethylene outer layer 3, the polyethylene inner layer 1 and the polyethylene outer layer 3 are annular respectively, the polyethylene inner layer 1 is arranged at the inner side of the polyethylene outer layer 3, and the polyethylene inner layer 1 is attached to the polyethylene outer layer 3, and the steel wire resin composite layer 2 is arranged inside the polyethylene outer layer 3;

[0037] The steel wire resin composite layer 2 is net-shaped, and the steel wire resin composite layer 2 comprises a plurality of steel wire composite bodies 21, the plurality of steel wire composite bodies 21 are cross-wound between the polyethylene inner layer 1 and the polyethylene outer layer 3, and the steel wire composite body 21 is spirally wound along the axis of the steel wire reinforced net pipe.

[0038] The steel wire composite body 21 comprises a steel wire 211 and a bonding resin coating layer 212, and the bonding resin coating layer 212 is coated on the outer surface of the steel wire 211.

[0039] The steel wire 211 is spirally wound by a plurality of single filaments 2111, and the single filament 2111 is helical.

[0040] The steel wire reinforced net pipe comprises a polyethylene inner layer 1, a steel wire resin composite layer 2 and a polyethylene outer layer 3, the steel wire 211 is coated inside the steel wire composite body 21 by arranging the bonding resin coating layer 212, and the steel wire resin composite layer 2 replaces the original bonding resin layer and the steel wire layer, since the steel wire resin composite layer 2 is net-shaped and the bonding resin coating layer 212 is also net-shaped, the contact area between the polyethylene inner layer 1 and the polyethylene outer layer 3 is greatly increased, and since the material properties of the polyethylene inner layer 1 and the polyethylene outer layer 3 are close, the polyethylene inner layer 1 and the polyethylene outer layer 3 are more likely to interact on the contact interface, and the two can be more closely integrated, which can avoid the peeling of the interface between the layers after long-term placement due to the difference in material properties, reduce the delamination phenomenon, ensure the structural strength of the steel wire reinforced net pipe, and improve the service life of the steel wire reinforced net pipe.

[0041] In addition, the steel wire 211 is spirally wound by a plurality of single wires 2111, the adhesive resin used for the adhesive resin coating layer 212 can infiltrate the gaps between the plurality of single wires 2111 and form a three-dimensional crosslinking network with the surface of the steel wire 211, the steel wire 211 and the adhesive resin coating layer 212 are tightly combined, the overall strength and toughness of the steel wire composite 21 are improved, the steel wire 211 is spirally wound by a plurality of single wires 2111, the surface area of the steel wire 211 is increased, and then the contact area between the steel wire 211 and the adhesive resin coating layer 212 is increased, the adhesion between the two is improved, and finally the long-term pressure-bearing capacity of the steel wire reinforced net pipe is improved. By arranging the single wire 2111 in a spiral shape, the single wire 2111 is in a non-completely straightened state at this time, so that the steel wire 211 formed by a plurality of single wires 2111 has greater deformation capacity along the axial direction of itself, thereby improving the bendability of the pipe material, which is more conducive to the installation and construction of the pipe material, and when the pipe material is affected by natural environmental factors such as terrain changes during the buried use, the steel wire reinforced net pipe can withstand a larger bending angle, effectively reducing the risk of pipe rupture due to bending. In addition, the steel wire reinforced net pipe replaces the original adhesive resin layer and steel wire layer with a steel wire resin composite layer 2, reducing the amount of adhesive resin used, which can reduce material costs.

[0042] The steel wire reinforced net pipe solves the technical problem that due to the difference in material properties, the steel wire net pipe will have delamination or adhesion failure between layers after long-term storage, resulting in a decrease in the overall strength of the pipe material and affecting the reliability and stability of the entire pipeline system.

[0043] Further, the relationship between the surface area of the steel wire 211 and the number of single wires 2111 is A is the surface area of the steel wire 211, and n is the number of single wires 2111. Compared with a conventional steel wire of the same weight, the surface area of the steel wire 211 wound by a plurality of single wires 2111 can be increased by 40%-70%.

[0044] As shown in Figure 4 In an embodiment of the present application, the steel wire 211 is spirally wound by double or triple single wires 2111.

[0045] The number of single wires 2111 in the steel wire reinforced net pipe is double or triple, and the steel wire 211 is spirally wound by double or triple single wires 2111, which can improve the overall tensile strength of the steel wire 211 and enhance the toughness of the steel wire 211, thereby making the steel wire composite 21 have high structural strength.

[0046] In an embodiment of the present application, the pitch of the double or triple single wires 2111 is 8-12 times the diameter of the single wire 2111.

[0047] The pitch of the double-stranded monofilament 2111 or the triple-stranded monofilament 2111 is 8-12 times the diameter of the monofilament 2111. A suitable pitch can make the stress distribution between the double-stranded monofilament 2111 and the triple-stranded monofilament 2111 more uniform, reduce the phenomenon of local stress concentration, improve the overall strength of the steel wire 211, avoid the breakage of the steel wire 211 due to uneven stress, and thus improve the service life of the steel wire composite 21.

[0048] Further, as shown in Figure 4 , the pitch of the double-stranded monofilament 2111 or the triple-stranded monofilament 2111 is the straight-line distance H between two adjacent winding points on the thread line as a whole.

[0049] As shown in Figure 6 , in an embodiment of the present application, the cross section of the steel wire composite 21 is circular.

[0050] The cross section of the steel wire composite 21 is circular, which can make the steel wire composite 21 have higher carrying capacity when subjected to external force impact, and enhance the overall toughness of the steel wire resin composite layer 2. The contact area between the steel wire composite 21 with the circular cross section and the polyethylene inner layer 1 and the polyethylene outer layer 3 is larger, which is conducive to forming stronger interfacial bonding between the polyethylene inner layer 1, the steel wire resin composite layer 2, and the polyethylene outer layer 3, thereby reducing the peeling at the interface between the layers of the steel wire reinforced net pipe.

[0051] As shown in Figure 7 , in an embodiment of the present application, the cross section of the steel wire composite 21 is polygonal.

[0052] The cross section of the steel wire composite 21 is polygonal, which can increase the surface area of the adhesive resin coating layer 212, i.e., increase the contact area between the adhesive resin coating layer 212 and the polyethylene inner layer 1 and the polyethylene outer layer 3, improve the adhesion effect, make the peeling strength between the adhesive resin coating layer 212 and the polyethylene inner layer 1 and the polyethylene outer layer 3 higher, and also improve the long-term pressure-bearing capacity of the steel wire reinforced net pipe.

[0053] As shown in Figure 7 , in an embodiment of the present application, the polygon has 3-8 corners.

[0054] The polygon with 3-8 corners has a relatively regular shape, which can avoid local stress concentration of the steel wire composite 21 and improve the deformation resistance of the steel wire composite 21.

[0055] Preferably, the polygon has 5 corners, and the cross section of the steel wire composite 21 is star-shaped.

[0056] In one embodiment of this application, the polyethylene inner layer 1 and the polyethylene outer layer 3 have the same structure.

[0057] Using polyethylene inner layer 1 and polyethylene outer layer 3 with the same structure can not only improve the overall stability of the steel wire reinforced mesh tube, but also help simplify the production process and reduce production costs.

[0058] Preferably, both the inner polyethylene layer 1 and the outer polyethylene layer 3 are made of existing high-density polyethylene material.

[0059] Preferably, the adhesive resin coating layer 212 is made of existing maleic anhydride-grafted polyethylene material with a grafting rate of 1%-3%.

[0060] like Figure 3 and 5 As shown, in one embodiment of this application, the winding angle of the steel wire composite 21 is an angle of 45°-60° with the axis of the steel wire reinforced mesh tube.

[0061] By setting a suitable winding angle for the steel wire composite 21, the distribution of the steel wire composite 21 within the steel wire resin composite layer 2 can be controlled. This allows several steel wire composites 21 to provide higher structural strength and stiffness to the steel wire resin composite layer 2. Furthermore, setting a suitable winding angle for the steel wire composite 21 can adjust the stress state of the steel wire composite 21 within the steel wire resin composite layer 2, resulting in a more uniform stress distribution and thus improving the overall stability of the steel wire resin composite layer 2.

[0062] To further explain, the steel wire composite 21 is wound between the polyethylene inner layer 1 and the polyethylene outer layer 3 using a combination of left-handed and right-handed spirals. Specifically, the steel wire composite 21 is first wound to a certain length in either a left-handed or right-handed direction, and then the direction is changed to continue winding in either a right-handed or left-handed manner. Several steel wire composites 21 are interlaced and wound between the polyethylene inner layer 1 and the polyethylene outer layer 3. This alternating left-handed and right-handed spiral method of the steel wire composite 21 can enhance the overall structural strength of the steel wire resin composite layer 2, ensuring that the steel wire resin composite layer 2 can tightly adhere to the polyethylene inner layer 1 and the polyethylene outer layer 3.

[0063] like Figure 5 As shown, in one embodiment of this application, the ends of the two steel wire composites 21 are overlapped.

[0064] The end-to-end lap connection between two steel wire composites 21 can increase the number of connection points between several steel wire composites 21, thereby making the steel wire resin composite layer 2 form a more continuous and stable structure. This can effectively reduce the risk of the structural strength of the steel wire resin composite layer 2 being reduced due to the breakage of the steel wire composite 21, and effectively improve the stability and reliability of this steel wire reinforced mesh pipe when subjected to external forces.

[0065] As Figure 3 shown in the embodiment of the present application, a plurality of mesh holes 22 are formed between the cross-wound steel wire composite bodies 21, and the mesh holes 22 are uniformly distributed and have the same size.

[0066] The uniformly distributed and same-sized mesh holes 22 enable the steel wire resin composite layer 2 to better disperse stress when stressed, thereby improving the strength and stability of the overall structure of the steel wire resin composite layer 2, and also enabling the steel wire resin composite layer 2 to have a more neat and beautiful appearance.

[0067] The production process of the embodiment of the present application is as follows:

[0068] In the actual production process, the double-stranded monofilament 2111 is first wound to form a steel wire 211, and then the steel wire 211 is soaked in adhesive resin, and the adhesive resin coating layer 212 completely covers the steel wire 211. After being taken out and cooled and shaped, the steel wire composite body 21 can be made. A plurality of steel wire composite bodies 21 are wound on the outer surface of the polyethylene inner layer 1 to form a steel wire resin composite layer 2. The oven can play a heating role. When the polyethylene inner layer 1 and the steel wire resin composite layer 2 enter the oven, the temperature of the two rises (the oven temperature is set to be about 15℃ lower than the melting point temperature of the material of the adhesive resin coating layer 212). At this time, the surface of the polyethylene inner layer 1 and the surface of the adhesive resin coating layer 212 are both in a semi-molten state, and they are mutually fused. After fusion, they are fused with the just-extruded polyethylene outer layer 3. Since the material temperature of the polyethylene outer layer 3 is high at this time, the polyethylene outer layer 3 can be fused with the surface of the adhesive resin coating layer 212, and also can be fused with the polyethylene inner layer 1 through the mesh holes 22 of the steel wire resin composite layer 2. Finally, the production of the steel wire reinforced mesh tube is realized.

[0069] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanation here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A steel wire reinforced netting tube, characterized by, The steel wire resin composite layer is arranged inside the polyethylene outer layer, and the polyethylene inner layer and the polyethylene outer layer are in close contact. The steel wire resin composite layer is in a mesh shape, and the steel wire resin composite layer comprises a plurality of steel wire composite bodies, and the plurality of steel wire composite bodies are cross-wound between the polyethylene inner layer and the polyethylene outer layer, and the steel wire composite bodies are spirally wound along the axis of the steel wire reinforced mesh pipe. The steel wire composite body comprises a steel wire and a bonding resin coating layer, and the bonding resin coating layer is coated on the outer surface of the steel wire. The steel wire is spirally wound by a plurality of strands of monofilaments, and the monofilament is in a spiral shape.

2. The steel wire reinforcing netting pipe according to claim 1, characterized by The steel wire is spirally wound by two strands of the monofilament or three strands of the monofilament.

3. The steel wire reinforcing mesh tube according to claim 2, characterized in that, The pitch of the two strands of the monofilament or the three strands of the monofilament is 8-12 times of the diameter of the monofilament.

4. The steel wire reinforcing netting tube according to claim 3, characterized in that, The cross section of the steel wire composite body is in a circular shape.

5. The steel wire reinforcing netting tube according to claim 3, wherein The cross section of the steel wire composite body is in a polygonal shape.

6. The steel wire reinforcing netting tube according to claim 5, characterized in that, The number of the polygonal angle is 3-8.

7. The steel wire reinforcing netting tube according to claim 1, wherein The polyethylene inner layer and the polyethylene outer layer are of the same structure.

8. The steel wire reinforcing netting pipe according to claim 7, characterized by The winding angle of the steel wire composite body is an included angle of 45°-60° with the axis of the steel wire reinforced mesh pipe.

9. The steel wire reinforcing netting tube according to claim 8, characterized in that, The end portions of the steel wire composite bodies are connected in a lap joint manner.

10. The steel wire reinforcing netting tube according to claim 1, characterized in that, A plurality of mesh holes are formed between the cross-wound plurality of steel wire composite bodies, and the plurality of mesh holes are uniformly distributed and of the same size.

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