Sectional type composite material electric pole and preparation method thereof

Abstract

The invention relates to the technical field of new material preparation, in particular to a sectional type composite material electric pole and a preparation method thereof. The sectional type composite material electric pole comprises at least one base pole. The base rod comprises a framework layer, and a cavity structure is defined by the framework layer. From inside to outside, the base rod further comprises a reinforcing layer arranged on the surface of the framework layer and a frosted layer arranged on the surface of the reinforcing layer; the framework layer comprises a first basalt fiber and a first coating layer attached to the surface of the first basalt fiber; the reinforcing layer comprises a second basalt fiber and a second coating layer attached to the surface of the second basalt fiber; the frosted layer comprises a third basalt fiber and a third coating layer attached to the surface of the third basalt fiber, and the strength, rigidity and stability of the electric pole are improved while the light weight of the electric pole is achieved. According to the base pole, the material performance can be brought into full play, the pole and tower rigidity is improved to the maximum extent, and the disaster area distribution network repair time is effectively shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new material preparation, and particularly relates to a sectional composite material electric pole and a preparation method thereof. BACKGROUND

[0002] Electric poles can be classified into wood poles, concrete poles and metal poles according to manufacturing materials. Wood poles are easily corroded under the action of bacteria, pests and birds, which is not conducive to the safety and reliability of distribution networks. Concrete poles are heavy in quality, and a large amount of manpower and material resources are consumed for their transportation and installation in mountainous areas with severe natural conditions, complex terrain and luxuriant vegetation. In addition, concrete poles are also prone to cracking due to environmental influences, which is also not conducive to the safety and reliability of distribution networks. Metal poles are prone to rust due to rainwater, and are expensive. In addition, the connection between the electric pole and the line consumes more insulating materials due to the electrical conductivity of the metal pole. Like concrete poles, the installation, transportation and maintenance of metal poles in disaster areas with blocked roads and inconvenient transportation are difficult.

[0003] Composite material electric poles have been applied in the repair of distribution networks in icing, landslide and other natural disaster areas in recent years due to their excellent characteristics such as high strength, light weight, strong insulation, anti-aging and corrosion resistance, and have been recognized by users. The existing composite material electric poles are mainly formed by winding “polyurethane resin and glass fiber” composite materials, but in actual application, due to various terrains and complex road conditions in mountainous areas, the length of the whole section type composite material electric pole made of glass fiber material is relatively long, and the quality is relatively heavy, with a single base weight of 200 kg or more. In the process of manual transportation, mechanical vehicle loading, etc., when encountering special situations such as traffic interruption, trees, large slopes and sharp turns, it is difficult to transfer, and it is difficult to meet the requirements of distribution network fault repair in disaster areas, which seriously restricts the power restoration process in disaster areas. The existing sectional composite material electric poles are prone to fracture failure at the connection part due to insufficient material strength and stress concentration. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a sectional composite material electric pole and a preparation method thereof.

[0005] In a first aspect, the present application provides a sectional composite material electric pole, comprising at least one base pole. The base pole comprises a framework layer, and the framework layer encloses a cavity structure. From inside to outside, the base pole further comprises a reinforcing layer arranged on the surface of the framework layer and a frosted layer arranged on the surface of the reinforcing layer. The skeleton layer comprises first basalt fibers and a first coating layer attached to the surface of the first basalt fibers; the reinforcing layer comprises second basalt fibers and a second coating layer attached to the surface of the second basalt fibers; and the sanding layer comprises third basalt fibers and a third coating layer attached to the surface of the third basalt fibers.

[0006] As an optional embodiment, the raw material of the first coating layer comprises epoxy resin, curing agent and impregnant.

[0007] As an optional embodiment, the raw material of the second coating layer comprises epoxy resin, curing agent, impregnant and anti-ultraviolet additive.

[0008] As an optional embodiment, the raw material of the third coating layer comprises epoxy resin, curing agent, impregnant and sanding additive.

[0009] The present application does not make specific requirements for the thickness and coating amount of the first coating layer, the second coating layer and the third coating layer.

[0010] As an optional embodiment, the mass ratio of the epoxy resin, the curing agent and the impregnant in the raw material of the first coating layer is (6-10):(0.5-2):(0.5-2); as an example, the ratio is 6:0.5:0.5, 6:0.5:2, 6:1:0.5, 6:1:1, 6:1:2, 6:2:0.5, 6:2:2, 8:1:1, 8:2:1, 8:2:2, 10:0.5:0.5, 10:0.5:1, 10:2:1, 10:2:2 or any ratio within the above range.

[0011] As an optional embodiment, the mass ratio of the epoxy resin, the curing agent and the impregnant in the raw material of the second coating layer is (6-10):(0.5-2):(0.5-2); as an example, the ratio is 6:0.5:0.5, 6:0.5:2, 6:1:0.5, 6:1:1, 6:1:2, 6:2:0.5, 6:2:2, 8:1:1, 8:2:1, 8:2:2, 10:0.5:0.5, 10:0.5:1, 10:2:1, 10:2:2 or any ratio within the above range.

[0012] Preferably, in the raw material of the second coating layer, the total mass of the epoxy resin, the curing agent and the impregnant is denoted as m1, and the mass of the anti-ultraviolet additive is denoted as m2, and the ratio of m1 and m2 is (15-20):(1-2); as an example, the ratio is 15:1, 15:2, 17:1, 17:2, 20:1, 20:2 or any ratio within the above range.

[0013] As an optional implementation, the mass ratio of epoxy resin, curing agent, and wetting agent in the raw materials of the third coating layer is (6-10):(0.5-2):(0.5-2); as an example, this ratio is 6:0.5:2, 6:1:0.5, 6:1:1, 6:1:2, 6:2:0.5, 6:2:2, 8:1:1, 8:2:1, 8:2:2, 10:0.5:0.5, 10:0.5:1 or any ratio within the above range.

[0014] Preferably, in the raw materials of the third coating layer, the total mass of the epoxy resin, curing agent and wetting agent is denoted as m3, the mass of the grinding aid is denoted as m4, and the ratio of m3 to m4 is (6-9):(0.5-2); as an example, this ratio is 6:2, 6:0.5, 6:1, 8:2, 8:0.5, 8:1.5, 9:2, 9:0.5 or any ratio within the above range.

[0015] As an optional implementation, the epoxy resins in the raw materials of the first coating layer, the second coating layer and the third coating layer are each independently selected from bisphenol A type epoxy resins, the curing agents are each independently selected from acid anhydride curing agents, and the wetting agents are each independently selected from silane type wetting agents. As an optional implementation, the UV-resistant additive includes nano-titanium dioxide and / or nano-zinc oxide; As an optional implementation, the grinding aid includes quartz sand and / or silicon carbide; As an optional implementation, the anhydride curing agent includes at least one of phthalic anhydride, tetrahydrophthalic anhydride and its derivatives, hexahydrophthalic anhydride and methyltetrahydrophthalic anhydride; As an optional implementation, the silane-type wetting agent includes at least one of aminosilane, epoxysilane, and vinylsilane; in this invention, aminosilane includes, but is not limited to, γ-aminopropyltriethoxysilane; epoxysilane includes, but is not limited to, γ-(2,3-epoxypropoxy)propyltrimethoxysilane; and vinylsilane includes, but is not limited to, vinyltriethoxysilane, vinyltrimethoxysilane, etc.

[0016] As an optional implementation, the thickness of the skeleton layer is 5.5-8.3 mm, preferably 6-8 mm; as an example, the thickness is 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.3 mm or any value within the above range.

[0017] As an optional implementation, the thickness of the reinforcing layer is 1.5-2.5 mm; as an example, the thickness is 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.5 mm or any value within the above range.

[0018] As an optional implementation, the thickness of the frosted layer is 1.5-2.5 mm; for example, the thickness is 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.5 mm or any value within the above range.

[0019] As an optional implementation, the thickness ratio of the skeleton layer, the reinforcing layer, and the frosted layer is (3-4.5):(0.8-1.2):(0.8-1.2), preferably 4:1:1; as an example, the thickness ratio is 3:0.8:0.8, 3:0.8:1.2, 3:1:1, 4:0.8:0.8, 4:0.8:1, 4:1.2:1.2, 4:1:1, 4:0.9:1, 4.5:0.8:0.8, 4.5:1:1, 4.5:1.2:1.2, or any ratio within the above range.

[0020] As an optional implementation, the longitudinal winding angle of the basalt fibers in the skeleton layer, reinforcing layer and frosted layer is independently selected from 20-25°, and the helical winding angle is independently selected from 50-55°.

[0021] In this invention, both the helical winding angle and the longitudinal winding angle can be obtained by conventional methods in the art. As an example, the longitudinal winding angle or the helical winding angle is obtained using the following method: (1) Calculate the equivalent modulus of rods with different winding angles, and obtain the winding angle using the following formula: (1) (2) (3) (4) In the formula: F e For the structural circumferential equivalent modulus, GPa; F s For the axial equivalent modulus of the structure, GPa; F ei The equivalent modulus of a single-layer circumferential structure is given in GPa; F. si The axial equivalent modulus of a single layer is expressed in GPa; F g θ represents the longitudinal modulus of the raw material, in GPa; i The spiral winding angle or longitudinal winding angle is expressed in degrees (°); h i denoted as the thickness of each single layer; g is the reduction factor, taken as g=0.75.

[0022] (2) Using finite element software such as Ansys, the stress and deflection values ​​of poles with different winding angles under different load conditions are calculated by finite element numerical simulation. The influence of basalt fiber winding orientation on the mechanical properties of the pole is determined, thereby obtaining the optimal fiber winding design and maximizing the pole stiffness. Under normal working conditions, the deflection at the top of the pole is less than or equal to 15‰ of the overall pole height. In summary, the longitudinal winding angle of this invention is independently selected from 20-25°, and the helical winding angle is independently selected from 50-55°.

[0023] As an optional implementation, when the pole includes multiple base poles, adjacent base poles are connected by a plug-in method and reinforced with through screws.

[0024] As an optional implementation, the base rod is conical. The present invention does not impose any limitations on the diameter and length of the base rod, which can be determined according to the usage requirements.

[0025] Secondly, the present invention provides a method for preparing the above-mentioned segmented composite material pole, comprising preparing the base pole, wherein the method for preparing the base pole includes the following steps: Under conditions of 50-90℃, the first basalt fiber is impregnated with the first impregnation liquid and then wound onto the surface of the mandrel to form a skeleton layer; the second basalt fiber is impregnated with the second impregnation liquid and then wound onto the surface of the skeleton layer to form a reinforcing layer; the third basalt fiber is impregnated with the third impregnation liquid and then wound onto the surface of the reinforcing layer to form a frosted layer; demolding and drying.

[0026] In this invention, the preparation method is carried out at 50-90°C during the three impregnation processes, with temperatures including 50°C, 60°C, 70°C, 80°C, 90°C, 50-70°C, 60-80°C, and 80-90°C.

[0027] In this invention, when preparing the base rod, basalt fibers are impregnated with an impregnation solution and then wound onto the surface of a mandrel. The mandrel is then demolded using the principle of thermal expansion and contraction, and dried to obtain the base rod.

[0028] It should be noted that during the winding process, longitudinal winding and helical winding are performed alternately.

[0029] As an optional implementation, the raw materials of the first impregnation liquid corresponding to the first coating layer include epoxy resin, curing agent and wetting agent in a mass ratio of (6-10):(0.5-2):(0.5-2).

[0030] The second impregnation liquid corresponds to the raw materials of the second coating layer, including epoxy resin, curing agent, wetting agent and UV-resistant additive. The mass ratio of epoxy resin, curing agent and wetting agent is (6-10):(0.5-2):(0.5-2). The total mass of epoxy resin, curing agent and wetting agent is denoted as m1, and the mass of UV-resistant additive is denoted as m2. The ratio of m1 to m2 is (15-20):(1-2).

[0031] The third impregnation liquid corresponds to the raw materials of the third coating layer, including epoxy resin, curing agent, wetting agent and wear-resistant agent. The mass ratio of epoxy resin, curing agent and wetting agent is (6-10):(0.5-2):(0.5-2). The total mass of epoxy resin, curing agent and wetting agent is recorded as m3, and the mass of wear-resistant agent is recorded as m4. The ratio of m3 to m4 is (6-9):(0.5-2).

[0032] The segmented composite material pole prepared by this invention solves the problems of low stiffness and large deflection of existing composite poles. The reinforcing layer enhances the UV resistance of the composite pole by adding anti-UV materials such as nano-TiO2 to the raw materials. The frosted layer embeds particles such as quartz sand in the resin to increase the surface friction of the pole and ensure the safety of power workers climbing the pole.

[0033] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art: 1. The segmented composite material pole provided by this invention includes at least one base pole; the base pole includes a skeleton layer, which encloses a cavity structure; from the inside to the outside, the base pole also includes a reinforcing layer disposed on the surface of the skeleton layer and a frosted layer disposed on the surface of the reinforcing layer; the skeleton layer includes a first basalt fiber and a first coating layer attached to the surface of the first basalt fiber; the reinforcing layer includes a second basalt fiber and a second coating layer attached to the surface of the second basalt fiber; the frosted layer includes a third basalt fiber and a third coating layer attached to the surface of the third basalt fiber. This pole achieves lightweighting while improving the strength, stiffness, and stability of the pole. The base pole of this invention includes a three-layer structure, and each layer uses basalt fiber with a coating layer, which can maximize the material performance and maximize the tower stiffness. This will overcome the technical difficulties of rapid assembly and efficient transportation of poles in power distribution network repair in areas where road traffic is interrupted after natural disasters, effectively shorten the repair time of power distribution networks in disaster areas, and provide technical and equipment support for improving the rapid repair capability of damaged power distribution lines.

[0034] 2. The segmented composite material pole provided by the present invention adds an anti-ultraviolet additive to the reinforcing layer to enhance the anti-ultraviolet aging performance of the composite material pole and improve the service life of the composite material pole in a strong ultraviolet environment.

[0035] Adding quartz sand to the frosted layer can increase friction, effectively assist workers in climbing, prevent slipping, and ensure safety.

[0036] 3. The segmented composite material pole provided by the present invention can adjust the thickness of the skeleton layer, the reinforcing layer and the frosted layer to ensure that the composite material pole has high mechanical strength while taking into account the properties of anti-ultraviolet aging and anti-slip, and at the same time ensures the economy of the composite material pole.

[0037] This invention adjusts the longitudinal winding angle and the helical winding angle to maximize the stiffness of the rod. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram showing the connection of multiple base poles in the pole of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the base pole in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the production equipment used to prepare the base rod in Embodiment 1 of the present invention; Figure label: 1-First base rod; 2-Second base rod; 3-Skeleton layer; 4-Reinforcing layer; 5-Frosted layer; 6-Control unit; 7-Impregnation unit; 8-Fiber storage unit. Detailed Implementation

[0041] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0043] The raw materials used in the following embodiments and comparative examples are all conventional raw materials in the art and can be obtained commercially.

[0044] Example 1 This embodiment provides a segmented composite material pole, comprising two base poles, a first base pole 1 and a second base pole 2, as shown below. Figure 1 As shown, the first base rod 1 and the second base rod 2 are connected sequentially by insertion and reinforced with through screws; the base rod includes a skeleton layer 3, which encloses a cavity structure; from the inside out, the base rod also includes a reinforcing layer 4 and a frosted layer 5, the reinforcing layer 4 is disposed on the surface of the skeleton layer 3, and the frosted layer 5 is disposed on the surface of the reinforcing layer 4, as shown. Figure 2 As shown, the thickness ratio of the skeleton layer, the reinforcing layer and the frosted layer is 4:1:1, and the thickness of the frosted layer is approximately 2 mm.

[0045] The skeleton layer includes basalt fibers and a first coating layer covering the basalt fibers. The raw materials of the first coating layer include bisphenol A type epoxy resin, methyltetrahydrophthalic anhydride and vinyltriethoxysilane in a mass ratio of 8:1.5:1.

[0046] The reinforcing layer includes basalt fiber and a second coating layer covering the basalt fiber. The raw materials of the second coating layer include bisphenol A type epoxy resin, methyltetrahydrophthalic anhydride, vinyltriethoxysilane and TiO2 in a mass ratio of 8:1.5:1:0.8.

[0047] The frosted layer consists of basalt fibers and a third coating layer covering the basalt fibers. The raw materials of the third coating layer include bisphenol A type epoxy resin, methyltetrahydrophthalic anhydride, vinyltriethoxysilane and quartz sand in a mass ratio of 8:1.5:1:0.6.

[0048] This embodiment provides a method for preparing the above-mentioned segmented composite material pole, including preparing the base pole and assembling the base pole to form... Figure 1 The pole shown is wherein the base pole is constructed as follows: Figure 3 The production equipment shown is used to prepare the base rod, and the preparation method includes the following steps: At 50-70℃, basalt fibers are impregnated with a first impregnation solution and then wound onto the surface of the mandrel to form a skeleton layer; the first impregnation solution includes bisphenol A type epoxy resin, methyltetrahydrophthalic anhydride and vinyltriethoxysilane in a mass ratio of 8:1.5:1. At 50-70℃, basalt fibers are impregnated with a second impregnation solution and then wound onto the surface of the skeleton layer to form a reinforcing layer; the second impregnation solution includes bisphenol A type epoxy resin, methyltetrahydrophthalic anhydride, vinyltriethoxysilane and TiO2 in a ratio of 8:1.5:1:0.8. At 50-70℃, basalt fibers are impregnated with a third impregnation solution and then wound onto the surface of the reinforcing layer to form a frosted layer; the third impregnation solution includes bisphenol A type epoxy resin, methyltetrahydrophthalic anhydride, vinyltriethoxysilane and quartz sand in a ratio of 8:1.5:1:0.6. After cooling, the mandrel is removed using thermal expansion and contraction, and the base rod is obtained after drying. During the winding process, longitudinal winding and helical winding are performed alternately; the longitudinal winding angle is 20-25°, and the helical winding angle is 50-55°.

[0049] The two base poles are then connected by a plug-in method and reinforced with through screws to form a composite segmented composite material pole.

[0050] Among them, such as Figure 3 As shown, the production equipment includes: Control unit 6 is used to fix the core mold and drive the core mold to rotate; Impregnation unit 7 is used to store the first impregnation liquid, the second impregnation liquid, or the third impregnation liquid; the angle of the longitudinal winding angle or the helical winding angle can be adjusted by moving the impregnation unit 7. Fiber storage unit 8 is used to store basalt fibers.

[0051] The working principle of the above-mentioned production equipment is as follows: First, the mandrel is fixed in the control unit 6, and the impregnation unit 7 stores the first impregnation liquid. Firstly, basalt fibers are output from the fiber storage unit, pass through the impregnation unit 7, and their surface is coated with the first impregnation liquid. Then, they are wound around the surface of the mandrel to form a skeleton layer. Next, the impregnation liquid in the impregnation unit 7 is adjusted to store the second impregnation liquid. After passing through the impregnation unit 7, the basalt fibers are coated with the second impregnation liquid and wound around the surface of the skeleton layer to form a reinforcing layer. Finally, the impregnation liquid in the impregnation unit 7 is adjusted to store the third impregnation liquid. After passing through the impregnation unit 7, the basalt fibers are coated with the third impregnation liquid and wound around the surface of the reinforcing layer to form a frosted layer.

[0052] Example 2 This embodiment provides a segmented composite material pole, which is basically the same as that in Embodiment 1, with the main difference being: in this embodiment, the mass ratio of bisphenol A epoxy resin, methyltetrahydrophthalic anhydride, and vinyltriethoxysilane in the first impregnation solution is 8:1:1.5; the mass ratio of bisphenol A epoxy resin, methyltetrahydrophthalic anhydride, vinyltriethoxysilane, and TiO2 in the second impregnation solution is 6:1:1.5:0.7; and the mass ratio of bisphenol A epoxy resin, methyltetrahydrophthalic anhydride, vinyltriethoxysilane, and quartz sand in the third impregnation solution is 7:0.5:1.5:1.3.

[0053] Example 3 This embodiment provides a segmented composite material pole, which is basically the same as that in Embodiment 1. The main difference is that the mass ratio of epoxy resin, acid anhydride curing agent, silane-type wetting agent, and TiO2 in the second impregnation solution of this embodiment is 8:0.3:1:0.5; and the mass ratio of epoxy resin, acid anhydride curing agent, silane-type wetting agent, and quartz sand in the third impregnation solution of this embodiment is 8:0.3:1:0.6.

[0054] Example 4 This embodiment provides a segmented composite material pole, which is basically the same as that in embodiment 1. The main difference is that the thickness of the frosted layer in this embodiment is 1.5 mm, and the thickness ratio of the skeleton layer, the reinforcing layer and the frosted layer is 3.5:1:0.9.

[0055] Comparative Example 1 This embodiment provides a segmented composite material pole, which is basically the same as that in Embodiment 1. The main difference is that polyurethane is used in this comparative example to replace the epoxy resin in the skeleton layer, reinforcing layer and frosted layer in Embodiment 1.

[0056] Comparative Example 2 This embodiment provides a segmented composite material pole, which is basically the same as that in Embodiment 1. The main difference is that glass fiber is used in this comparative example instead of basalt fiber in the skeleton layer, reinforcing layer and frosted layer in Embodiment 1.

[0057] Test case This test case provides the mechanical properties of the base rods provided in various embodiments and comparative examples, as detailed below: The base poles provided in each embodiment and comparative example are fixed at the bottom according to standard requirements. A lateral tensile force perpendicular to the pole axis is applied to the top. The load is applied continuously. When the load reaches 6kN and the bending moment at the pole root reaches 58.5kN·m, the deflection value at the top of the base pole is recorded at this time.

[0058] The base rods provided in each embodiment and comparative example were fixed at the bottom according to standard requirements. A transverse tensile force perpendicular to the rod axis was applied to the top, and the load was continuously applied. When the load reached 12 kN and the bending moment reached 117 kN·m, the requirements were met. Then, the load was increased further. When a clear cracking sound was heard or a clear crack appeared, the maximum load value that caused the failure of the base rod was recorded as the failure force value. The test results are shown in Table 1.

[0059] Table 1 Test Results

[0060] The test results above show that Comparative Example 1, which uses polyurethane instead of epoxy resin, exhibits a higher deflection value, indicating poor rigidity. Its destructive force value is also inferior to that of the present invention, demonstrating that impregnating basalt fiber with epoxy resin in the present invention improves the rigidity and strength of the base rod. Comparative Example 2, which uses glass fiber instead of basalt fiber, fails to meet the requirements of a load of 12 kN and a bending moment of 117 kN·m during the destructive force test; the base rod fails when the load reaches 11.5 kN.

[0061] The test results from Examples 1-4 show that the base rod provided by the present invention has good deflection and destructive force values, indicating high rigidity and strength.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A segmented composite material pole, characterized in that, Includes at least one base rod; The base rod includes a skeleton layer, which encloses a cavity structure; From the inside out, the base rod also includes a reinforcing layer disposed on the surface of the skeleton layer and a frosted layer disposed on the surface of the reinforcing layer; The skeleton layer includes a first basalt fiber and a first coating layer attached to the surface of the first basalt fiber; the reinforcing layer includes a second basalt fiber and a second coating layer attached to the surface of the second basalt fiber; the frosted layer includes a third basalt fiber and a third coating layer attached to the surface of the third basalt fiber.

2. The segmented composite material pole according to claim 1, characterized in that, The raw materials for the first coating layer include epoxy resin, curing agent, and wetting agent; And / or, the raw materials of the second coating layer include epoxy resin, curing agent, wetting agent and UV-resistant additive; And / or, the raw materials of the third coating layer include epoxy resin, curing agent, wetting agent and grinding aid.

3. The segmented composite material pole according to claim 2, characterized in that, The mass ratio of epoxy resin, curing agent and wetting agent in the raw materials of the first coating layer is (6-10):(0.5-2):(0.5-2); And / or, the mass ratio of epoxy resin, curing agent and wetting agent in the raw material of the second coating layer is (6-10):(0.5-2):(0.5-2); preferably, in the raw material of the second coating layer, the total mass of epoxy resin, curing agent and wetting agent is denoted as m1, the mass of UV-resistant additive is denoted as m2, and the ratio of m1 to m2 is (15-20):(1-2); And / or, the mass ratio of epoxy resin, curing agent and wetting agent in the raw material of the third coating layer is (6-10):(0.5-2):(0.5-2); preferably, in the raw material of the third coating layer, the total mass of epoxy resin, curing agent and wetting agent is denoted as m3, the mass of grinding aid is denoted as m4, and the ratio of m3 to m4 is (6-9):(0.5-2).

4. The segmented composite material pole according to claim 3, characterized in that, The epoxy resins in the raw materials of the first coating layer, the second coating layer and the third coating layer are each independently selected from bisphenol A type epoxy resins, the curing agents are each independently selected from acid anhydride curing agents, and the wetting agents are each independently selected from silane type wetting agents; And / or, the UV-resistant additives include nano-titanium dioxide and / or nano-zinc oxide; And / or, the grinding aid comprises silica sand and / or silicon carbide.

5. The segmented composite material pole according to claim 4, characterized in that, The anhydride curing agent includes at least one of phthalic anhydride, tetrahydrophthalic anhydride and its derivatives, hexahydrophthalic anhydride and methyltetrahydrophthalic anhydride; And / or, the silane-type wetting agent includes at least one of aminosilane, epoxysilane and vinylsilane.

6. The segmented composite material pole according to any one of claims 1-5, characterized in that, The thickness of the skeleton layer is 5.5-8.3 mm, preferably 6-8 mm; And / or, the thickness of the reinforcing layer is 1.5-2.5 mm; And / or, the thickness of the frosted layer is 1.5-2.5 mm.

7. The segmented composite material pole according to any one of claims 1-6, characterized in that, The thickness ratio of the skeleton layer, the reinforcing layer and the frosted layer is (3-4.5):(0.8-1.2):(0.8-1.2), preferably 4:1:

1.

8. The segmented composite material pole according to any one of claims 1-7, characterized in that, The longitudinal winding angle of the basalt fibers in the skeleton layer, reinforcing layer and frosted layer is independently selected from 20-25°, and the helical winding angle is independently selected from 50-55°.

9. The segmented composite material pole according to any one of claims 1-8, characterized in that, When the pole includes multiple base poles, two adjacent base poles are connected by a plug-in method and reinforced with through screw pins. And / or, the base rod is conical.

10. The method for preparing the segmented composite material pole according to any one of claims 1-9, characterized in that, The method for preparing the base rod includes the following steps: Under conditions of 50-90℃, the first basalt fiber is impregnated with the first impregnation liquid and then wound onto the surface of the mandrel to form a skeleton layer; the second basalt fiber is impregnated with the second impregnation liquid and then wound onto the surface of the skeleton layer to form a reinforcing layer; the third basalt fiber is impregnated with the third impregnation liquid and then wound onto the surface of the reinforcing layer to form a frosted layer; demolding and drying.

Images