Basalt fiber reinforced polyethylene steel wire reinforced composite pipe

Abstract

The invention discloses a basalt fiber reinforced polyethylene steel wire reinforced composite pipe, relates to the technical field of pipes, and solves the technical problems that an existing glass fiber reinforced polyethylene winding structure wall pipeline is relatively low in ring stiffness, low in overall strength, relatively poor in mechanical property and easy to deform and crack during use. The corrugated pipe comprises a pipe body, the pipe body is formed by spirally winding a plate strip and a plastic-coated steel wire into base materials and then bonding the multiple base materials through a bonding layer in a hot melting mode, the plate strip is made of a basalt fiber reinforced polyethylene composite material and is provided with a reinforcing structure, and a wave crest structure is bonded to the reinforcing structure in a hot melting mode; according to the basalt fiber reinforced polyethylene steel wire reinforced composite pipe, the ring stiffness and impact resistance of the pipe body are effectively improved, the pipe strength is higher, the structure is more stable, and the composite pipe cannot be broken and is not prone to deformation when encountering instantaneous ultra-large pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe materials, and particularly relates to a basalt fiber reinforced polyethylene steel wire reinforced composite pipe. Background Art

[0002] Existing municipal water supply and drainage pipes are mainly made of polyethylene as raw materials or pipes strengthened by other production processes. The pressure resistance or compressive capacity of the pipes is not strong. However, whether the pipes are produced with pure polyethylene resin or other production processes, most of them have low strength, poor pressure resistance performance of the pipes, and the pipe body is prone to deformation and cracking under external force, resulting in drainage leakage of the pipe body, thus affecting environmental protection.

[0003] At present, the glass fiber reinforced polyethylene winding structured wall pipes produced on the market, due to the glass fiber material components on the inner and outer walls of the pipes, will pollute the environment when contacting with drainage. Moreover, the ring stiffness of the existing glass fiber reinforced polyethylene winding structured wall pipes is relatively low, and the overall strength of the pipes is not high, resulting in poor mechanical properties of the pipes and being prone to deformation and cracking during use.

[0004] Basalt fiber reinforced thermoplastic composite material is a commonly used technical method for modifying and strengthening thermoplastic plastic materials. Basalt fiber is a continuous fiber material drawn from natural basalt, mainly composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide, and titanium dioxide. It is a new type of inorganic environmental protection green high-performance fiber material. Basalt fiber has properties such as ultraviolet resistance, anti-aging, high tensile strength, high elastic modulus, good heat resistance, and good chemical corrosion resistance. The product has excellent performance, stable quality, and small coefficient of variation, making the polyethylene reinforced with basalt fiber winding pipe become the preferred plastic pipe variety for important drainage projects in recent years.

[0005] Based on this, the present invention provides a steel wire reinforced composite pipe based on basalt fiber reinforced polyethylene to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the technical problems that the existing glass fiber reinforced polyethylene winding structured wall pipes have relatively low ring stiffness, low overall strength, and poor mechanical properties, and are prone to deformation and cracking during use. The purpose is to provide a basalt fiber reinforced polyethylene steel wire reinforced composite pipe, which improves the ring stiffness and impact resistance of the pipe body, has higher pipe strength and more stable structure, and will not break or deform easily when encountering instantaneous super-large pressure.

[0007] The present invention is achieved through the following technical solutions:

[0008] A basalt fiber reinforced polyethylene steel wire reinforced composite pipe, comprising:

[0009] The pipe body is formed by helically winding a strip and plastic-coated steel wires into a base material, and then thermally bonding a plurality of base materials through an adhesive layer. The strip is made of a basalt fiber-reinforced polyethylene composite material;

[0010] The strip has a reinforcing structure, and a wave crest structure is thermally bonded to the reinforcing structure.

[0011] In the basalt fiber-reinforced polyethylene (BFRPE) steel wire-reinforced composite pipe of the present invention, by arranging plastic-coated steel wires, a reinforcing structure and a wave crest structure in the pipe body, and the strip being made of a modified basalt fiber-reinforced polyethylene BFRPE composite material, the composite pipe of the present invention has high ring stiffness, good impact resistance, excellent mechanical properties, higher pipe strength and more stable structure, and will not break or deform easily when encountering an instantaneous ultra-large pressure.

[0012] Further, the wave crest structure is an arc-shaped protrusion.

[0013] Further, the wave crest structure is made of PE100N material.

[0014] Further, the reinforcing structure includes inner rib reinforcing ribs. The upper end of the inner rib reinforcing ribs is bonded to the wave crest structure, and the lower end of the inner rib reinforcing ribs is connected to the strip.

[0015] Further, weight-reducing holes are provided inside the reinforcing structure.

[0016] Further, the cross-section of the reinforcing structure is trapezoidal.

[0017] Further, plastic-coated steel wires are provided inside the adhesive layer.

[0018] Further, the adhesive layer is made of a reinforced polyethylene material.

[0019] Further, a cladding layer is further included, and the cladding layer is thermally bonded to the inner wall and the outer wall of the pipe body.

[0020] Further, the cladding layer is made of HDPE material.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. The strip of the present invention is made of a modified basalt fiber-reinforced polyethylene BFRPE composite material. The basalt fiber has the characteristics of high elastic modulus and good tensile strength. When subjected to external impact, the fiber becomes a fast channel for energy transfer, enabling the impact energy to be quickly transferred and absorbed, greatly improving the flexural modulus and impact strength of the raw material, thereby improving the impact resistance of the BFRPE steel wire-reinforced composite pipe of the present invention. At the same time, the basalt fiber will share a part of the external load acting on the pipe matrix, thereby playing a role in strengthening the pipe.

[0023] 2. The plate strip of the present invention adopts the internal addition of plastic-coated steel wire to enhance the ring stiffness of the pipe body, so that the pipe body is not easily deformed and cracked under the action of external force; the plate strip and the plastic-coated steel wire are spirally wound on the forming roller by a winding forming machine to form a base material, and then hot-melt together with an adhesive layer material. With this production method, a large-diameter pipe that cannot be obtained by conventional methods can be obtained, and the pipe diameter can reach more than 2m.

[0024] 3. The present invention arranges a reinforcement structure on the plate strip, and the reinforcement structure is arranged along the outer periphery of the tube body to support the inner wall of the tube body and enhance the ring stiffness of the tube body so that the tube body is not easily deformed and cracked under the action of external force.

[0025] 4. The present invention also provides a peak structure on the reinforcement structure. The outer surface of the peak structure contacts the soil, which can increase the contact area between the pipe body and the soil, making the force more uniform, thereby improving the mechanical properties of the pipe body, and preventing deformation and cracking under the action of external force.

[0026] 5. The basalt fiber reinforced polyethylene steel wire reinforced composite pipe of the present invention has plastic-coated steel wire, reinforcement structure and wave crest structure arranged in the pipe body, and the plate and strip adopt modified basalt fiber reinforced polyethylene BFRPE composite material, so that the composite pipe of the present invention has high ring stiffness, good impact resistance and excellent mechanical properties, and the pipe has higher strength and more stable structure, and will not break or deform when encountering instantaneous super-large pressure.

[0027] 6. The present invention provides weight-reducing holes inside the reinforcing structure, thereby achieving weight reduction of the pipe body while meeting the strength and rigidity of the reinforcing structure, which is beneficial to reducing production costs.

[0028] 7. The present invention increases the strength of the bonding part by adding plastic-coated steel wire inside the bonding layer, thereby further improving the ring rigidity of the pipe body and making the pipe body less likely to deform and crack under the action of external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 It is a schematic diagram of the cross-sectional structure of the basalt fiber reinforced polyethylene steel wire reinforced composite pipe of the present invention;

[0031] Figure 2Schematic diagram of the pipe body base material structure of the basalt fiber reinforced polyethylene steel wire reinforced composite pipe of the present invention;

[0032] Figure 3 Schematic diagram of the external structure of the basalt fiber reinforced polyethylene steel wire reinforced composite pipe of the present invention.

[0033] Markings in the drawings and corresponding component names:

[0034] 1 - strip, 2 - strengthening structure, 201 - inner rib stiffener, 202 - weight reduction hole, 3 - plastic coated steel wire, 4 - adhesive layer, 5 - wave crest structure, 6 - covering layer. Specific embodiments

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0036] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those of ordinary skill in the art that: these specific details do not have to be employed to practice the present invention. In other embodiments, well-known structures, circuits, materials or methods have not been specifically described in order to avoid obscuring the present invention.

[0037] Throughout the specification, the reference to "one embodiment", "an embodiment", "one example" or "an example" means that a particular feature, structure or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "an embodiment", "one example" or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. In addition, the specific features, structures or characteristics may be combined in any suitable combination and / or sub - combination in one or more embodiments or examples. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0038] In the description of the present invention, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Meanwhile, the terms "arranged", "assembled", "connected", and "linked" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Example 1

[0041] This example provides a basalt fiber-reinforced polyethylene steel wire-reinforced composite pipe, as Figures 1-3 shown, including:

[0042] A pipe body, which is formed by spirally winding a strip 1 and a plastic-coated steel wire 3 into a base material, and then thermally bonding a plurality of base materials through an adhesive layer 4. The strip 1 is made of a basalt fiber-reinforced polyethylene composite material;

[0043] The strip 1 has a reinforcing structure 2, and a wave crest structure 5 is thermally bonded to the reinforcing structure 2.

[0044] First, the strip 1 of the present invention is made of a modified basalt fiber-reinforced polyethylene BFRPE composite material, and the modified basalt fiber-reinforced polyethylene BFRPE composite material uses the material described in the patent document with the publication number CN117209874B of the company. Basalt fiber has the characteristics of high elastic modulus and good tensile strength. In the basalt fiber-reinforced polyethylene resin-based composite material, a block copolymer macromolecular coupling agent of polystyrene and 2-hydroxyethyl acrylate is introduced to improve the interfacial properties of the composite material, enabling good cross-sectional adhesion between the basalt fiber and the polyethylene matrix, quickly dispersing the externally applied load, absorbing the energy of the external force, and realizing the enhancement and toughening of the composite material; when subjected to external impact, the fiber becomes a fast channel for energy transfer, enabling the impact energy to be quickly transferred and absorbed, greatly improving the flexural modulus and impact strength of the raw material, thereby improving the impact resistance of the BFRPE steel wire-reinforced composite pipe of the present invention. At the same time, the basalt fiber will share a part of the externally applied load acting on the pipe matrix, thereby playing a role in strengthening the pipe.

[0045] Second, the strip 1 of the present invention is internally provided with a plastic-coated steel wire to enhance the ring stiffness of the pipe body, so that the pipe body is not easily deformed and cracked under the action of external force; the strip 1 and the plastic-coated steel wire are wound around a forming roller in a spiral manner by a winding forming machine to form a base material, and then thermally melted together through the material of the adhesive layer 4. In this way of production, a large-diameter pipe that cannot be obtained by conventional methods can be obtained, and the pipe diameter can reach more than 2m.

[0046] In addition, the present invention provides a reinforcing structure 2 on the strip 1. The reinforcing structure 2 is arranged along the outer periphery of the pipe body, which can support the inner wall of the pipe body and enhance the ring stiffness of the pipe body, so that the pipe body is not easily deformed or cracked under external forces.

[0047] Meanwhile, the present invention also provides a wave crest structure 5 on the reinforcing structure 2. The outer surface of the wave crest structure 5 is in contact with the soil, which can increase the contact area between the pipe body and the soil, making the force more uniform, thereby improving the mechanical properties of the pipe body and making it not easily deformed or cracked under external forces.

[0048] Therefore, by arranging the plastic-coated steel wire 3, the reinforcing structure 2 and the wave crest structure 5 in the pipe body of the basalt fiber-reinforced polyethylene steel wire-reinforced composite pipe of the present invention, and using the modified basalt fiber-reinforced polyethylene BFRPE composite material for the strip 1, the composite pipe of the present invention has high ring stiffness, good impact resistance and excellent mechanical properties, making the pipe stronger and more stable in structure. It will not break or deform easily when encountering an instantaneous super-large pressure. After laboratory testing, the creep ratio of the pipe of the present invention is ≤3.2%. After the soil is backfilled to the trough of the outer surface of the pipe, under high loads, the wave crest structure 5 will not deform or crack. Compared with cement drain pipes and cast iron drain pipes, it has a lower cost, a longer service life, and can easily obtain large-diameter pipes. Also, due to the use of basalt fiber-reinforced polyethylene resin-based composite materials, the internal friction coefficient of the pipe is small, the flow-through capacity is strong, and the flow rate is high.

[0049] Example 2

[0050] This example further illustrates the technical solution of the present invention on the basis of Example 1.

[0051] As Figure 2 shown, the wave crest structure 5 is an arc-shaped protrusion, and the wave crest structure 5 is made of PE100N material.

[0052] The arc-shaped wave crest structure 5 has an arc surface. The contact of this arc surface with the soil can increase the contact area between the pipe body and the soil, making the force on the pipe body more uniform, thereby improving the mechanical properties of the pipe body and making it not easily deformed or cracked under external forces.

[0053] Example 3

[0054] This example further illustrates the technical solution of the present invention on the basis of Example 1.

[0055] As Figure 1 and 2As shown in the figure, the strengthening structure 2 includes internal rib stiffeners 201. The upper ends of the internal rib stiffeners 201 are bonded to the peak structures 5, and the lower ends of the internal rib stiffeners 201 are connected to the strip 1. The internal rib stiffeners 201 are distributed radially along the pipe body. The setting of the internal rib stiffeners 201 can effectively improve the strength of the pipe body and also increase the ring stiffness of the pipe body.

[0056] Preferably, weight-reducing holes 202 are provided inside the strengthening structure 2. By providing weight-reducing holes 202 inside the strengthening structure 2, the weight of the pipe body is reduced on the premise of meeting the strength and stiffness of the strengthening structure 2, which is beneficial to reducing production costs.

[0057] Preferably, the cross-section of the strengthening structure 2 is trapezoidal. The trapezoidal strengthening structure 2 can provide more stable support for the inner wall of the pipe body. Coupled with the uniform dispersion of the soil force by the peak structure 5, the force distribution of the pipe body can be optimized, thereby improving the mechanical properties of the pipe body and making it not easily deformed and cracked under external forces.

[0058] Example 4

[0059] This example further illustrates the technical solution of the present invention on the basis of Example 1.

[0060] As Figure 1 shown, coated steel wires 3 are provided inside the adhesive layer 4, and the adhesive layer 4 is made of reinforced polyethylene material.

[0061] By adding coated steel wires inside the adhesive layer 4, the strength of the bonding part is increased, so that the ring stiffness of the pipe body can be further improved, and the pipe body is not easily deformed and cracked under external forces.

[0062] Example 5

[0063] This example further illustrates the technical solution of the present invention on the basis of any of the foregoing examples.

[0064] As Figure 1 shown, the basalt fiber reinforced polyethylene steel wire reinforced composite pipe of the present invention further includes a covering layer 6. The covering layer 6 is hot-melt bonded to the inner wall and the outer wall of the pipe body, and the covering layer 6 is made of HDPE material.

[0065] The surfaces of the strengthening structure 2 and the strip 1 are covered with HDPE high-density polyethylene material, which plays a protective role for the strip 1 and the strengthening structure 2. Since the basalt fiber is covered inside, it will not come into contact with the drainage and will not pollute the environment. The covering layer 6 and the modified basalt fiber-reinforced polyethylene BFRPE material are melted into one body, without delamination and gaps. In addition, the steel wire after plastic coating will not produce delamination and gaps either. The materials are well fused to form a solid wall, enabling the pipe to evenly distribute the force. Under high loads, the pipe body is not easily deformed or cracked, further improving the ring stiffness of the pipe body.

[0066] Experimental example

[0067] Performance tests were carried out on the basalt fiber-reinforced polyethylene steel wire-reinforced composite pipe of the present invention and other pipes, and the test results are shown in Table 1.

[0068] Table 1. Performance test data of basalt fiber-reinforced polyethylene steel wire-reinforced composite pipe and other pipes

[0069]

[0070] It can be seen from the data in Table 1 that:

[0071] The physical and mechanical properties of the BFRPE steel wire-reinforced composite pipe of the present invention are higher than those of other similar pipes without steel wires. Among them, the ring stiffness of the BFRPE steel wire-reinforced composite pipe of the present invention increases by ≥45% compared with the pipe body without plastic-coated steel wires; the impact performance TIR of the BFRPE steel wire-reinforced composite pipe of the present invention is ≤7%, and the impact resistance performance is improved by 30% compared with the pipe body without plastic-coated steel wires and the corrugated pipe; at the same time, although the BFRPE steel wire-reinforced composite pipe of the present invention is provided with plastic-coated steel wires, compared with the pipe body without plastic-coated steel wires, the weight basically remains unchanged, and compared with the corrugated pipe, the product weight is reduced, reducing the production cost.

[0072] Finally, it should be noted that: The above specific embodiments are only used to illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only the specific implementation manners of the present invention and is not used to limit the protection scope of the present invention; Although the present invention has been described in detail with reference to the above specific embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements or improvements on some or all of the technical features; And these modifications, equivalent replacements and improvements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe, characterized in that, Comprising: A pipe body, which is formed by helically winding a strip (1) and plastic-coated steel wires (3) into a base material, and then thermally bonding a plurality of base materials through an adhesive layer (4). The strip (1) is made of a basalt fiber-reinforced polyethylene composite material; The strip (1) has a strengthening structure (2), and a wave crest structure (5) is thermally bonded to the strengthening structure (2).

2. The basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 1, characterized in that, The wave crest structure (5) is an arc-shaped protrusion.

3. The basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 2, characterized in that, The wave crest structure (5) is made of PE100N material.

4. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 1, characterized in that, The strengthening structure (2) includes an inner rib strengthening rib (201). The upper end of the inner rib strengthening rib (201) is bonded to the wave crest structure (5), and the lower end of the inner rib strengthening rib (201) is connected to the strip (1).

5. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 4, characterized in that, Weight-reducing holes (202) are provided inside the strengthening structure (2).

6. The basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 1, wherein The cross-section of the strengthening structure (2) is trapezoidal.

7. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 1, characterized in that, Plastic-coated steel wires (3) are provided inside the adhesive layer (4).

8. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 7, characterized in that, The adhesive layer (4) is made of reinforced polyethylene material.

9. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to any one of claims 1-8, characterized in that, It further includes a covering layer (6), and the covering layer (6) is thermally bonded to the inner wall and the outer wall of the pipe body.

10. A basalt fiber reinforced polyethylene steel wire reinforced composite pipe according to claim 9, characterized in that, The covering layer (6) is made of HDPE material.

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