Insulating arm support and preparation method thereof

Abstract

The invention relates to an insulating arm support and a preparation method thereof, and further relates to an overhead working truck comprising the insulating arm support. The insulation arm support is high in rigidity and insulativity, and can keep a high insulation effect after being exposed to the rain, so that the reliability of equipment in a complex environment is effectively improved.

Description

[0001] Cross-references

[0002] This application is based on the application with Chinese application number 202411868892.7 and filing date December 18, 2024, and claims its priority. The disclosed content of the Chinese application is hereby introduced as a whole into this application. Technical Field

[0003] The present application belongs to the field of engineering machinery, and specifically relates to an insulating boom and a preparation method thereof, and also relates to an aerial work vehicle including the insulating boom. Background Art

[0004] The insulated boom truck was originally introduced into the power industry as a special vehicle for intermediate potential operations in places with convenient transportation and complex wiring. With the development of the power industry and the continuous advancement of technology, the insulated boom truck has experienced many technological breakthroughs and product upgrades. The operating height has developed from the initial several meters and more than ten meters to the current 25 meters or even higher, which puts forward higher technical requirements for the performance of the insulation section of the vehicle's main arm. At present, whether it is a telescopic or folding insulated boom truck, the end arm is an insulating section with a length ranging from 1 to 6 meters. This section needs to have extremely high bending strength, torsional strength and excellent insulation performance. The application field of insulated boom trucks is becoming more and more extensive, and it is gradually being rapidly promoted to industries such as railways and communications. However, as the insulation section is easily affected by environmental factors such as rain, dew, and frost, the insulation property decreases, resulting in a decrease in the attendance rate of insulated boom trucks.

[0005] At present, most of the insulating booms on the market are made of glass fiber as the reinforcement phase and resin as the continuous phase, which are composited and solidified through the wet winding process. Due to the limitations of the wet winding process, the angle between the fiber arrangement direction and the center axis of the mold is usually more than 5°, which cannot give full play to the characteristics of high axial strength and high modulus of the fiber. In terms of insulation, the outer surface is usually sprayed with gel coat. The styrene contained in the gel coat is not good for the health of the workers and also causes great pollution to the environment.

[0006] Therefore, it is necessary to improve the boom to ensure its working stability and insulation performance. Summary of the invention

[0007] The purpose of the present application is to improve the rigidity of an insulating arm support, and to provide an insulating arm support, a method for preparing the insulating arm support, and an aerial work vehicle.

[0008] In some embodiments, an insulating arm frame for an aerial work vehicle (such as an insulated boom vehicle) is provided. The insulating arm frame has high rigidity and insulation, and can maintain a high insulation effect even after being rained on, thereby effectively improving the reliability of the equipment in complex environments.

[0009] A first aspect of the present application relates to an insulating arm support, comprising an insulating arm body, wherein the insulating arm body comprises fibers and resin, wherein the fibers comprise basalt fibers and glass fibers, and the fiber bundles are bonded by resin.

[0010] The rigidity of the insulating arm is improved by combining basalt fiber with glass fiber, and retaining the glass fiber can improve the firmness of the combination of fiber and resin.

[0011] In certain embodiments, the insulating arm frame includes a hollow insulating arm body, which includes alternately stacked basalt fiber reinforced resin layers and glass fiber reinforced resin layers. Preferably, the thickness of the basalt fiber reinforced resin layer is 1 to 6 times the thickness of the glass fiber reinforced resin layer, preferably 2 to 5 times, and further preferably 3 to 4 times.

[0012] In some embodiments, the number of basalt fiber layers in each basalt fiber reinforced resin layer is n1, the number of glass fiber layers in each glass fiber reinforced resin layer is n2, and n1 / n2 is between 1-6, preferably between 2-5, such as 2, 3, 4 or 5.

[0013] In certain embodiments, the surface of the basalt fiber is treated by atmospheric pressure plasma etching.

[0014] Certain embodiments of the present application relate to an insulating arm frame for an aerial work vehicle (e.g., an insulated boom vehicle), comprising a hollow insulating arm body, wherein the hollow insulating arm body is formed by alternatingly stacking basalt fiber reinforced resin layers and glass fiber reinforced resin layers, wherein the thickness of the basalt fiber reinforced resin layers is 1 to 6 times the thickness of the glass fiber reinforced resin layers, wherein the glass fiber reinforced resin layers are based on resin and based on glass fibers as a skeleton, and the resin matrix and the glass fibers are bonded to form an integral layered structure; wherein the basalt fiber reinforced resin layers are based on resin and based on basalt fibers as a skeleton, and the resin matrix and the basalt fibers are bonded to form an integral layered structure, wherein the surface of the basalt fibers is treated by atmospheric pressure plasma etching.

[0015] In certain embodiments, the surface of the basalt fiber is etched with atmospheric pressure plasma at a voltage of 20V to 60V for a processing time of 3s to 10s.

[0016] In certain embodiments, the thickness of the basalt fiber reinforced resin layer is 2 to 5 times the thickness of the glass fiber reinforced resin layer.

[0017] In certain embodiments, the thickness of the basalt fiber reinforced resin layer is 3 to 4 times the thickness of the glass fiber reinforced resin layer.

[0018] In certain embodiments, the glass fibers are E-grade glass fibers.

[0019] In some embodiments, the glass fiber meets any one or more of the following conditions: linear density of 2400 tex to 4800 tex, single fiber diameter of 14 to 17 μm, resistivity ≥ 1×10 11 Ω·m, moisture content ≤0.10%, combustible content ≤0.5%, elastic modulus ≥75GPa.

[0020] In some embodiments, the basalt fiber meets any one or more of the following conditions: linear density of 2400 tex to 4800 tex, single fiber diameter of 13 to 16 μm, resistivity ≥ 1×10 12 Ω·m, moisture content ≤0.10%, combustible content ≤0.5%, elastic modulus ≥90GPa.

[0021] In certain embodiments, the atmospheric-pressure plasma is an atmospheric-pressure plasma formed by argon, carbon dioxide, oxygen, methane, acetylene or air.

[0022] In certain embodiments, the resin comprises an epoxy resin and / or a vinyl ester resin, preferably an epoxy resin or a vinyl ester resin.

[0023] In certain embodiments, the flexural strength of the resin is ≥ 140 MPa.

[0024] In certain embodiments, the curing agent used for curing the resin is an aromatic amine curing agent (such as diaminodiphenyl sulfone, diaminodiphenylmethane), an acid anhydride curing agent (such as methyl nadic anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride) or a peroxide curing agent (such as isobutyl ketone peroxide, cyclohexanone oxide, methyl ethyl ketone peroxide, benzoyl peroxide, isocyanuric acid propylbenzene peroxide), and the reaction accelerator used for curing the resin is cobalt naphthenate, cobalt isooctanoate, dimethylaniline or diethylaniline.

[0025] In certain embodiments, the curing agent is isobutyl ketone peroxide, and the reaction accelerator is cobalt isooctanoate.

[0026] In some embodiments, the weight ratio of the resin to the curing agent and the accelerator is 100:(0.8-4):(0.05-3). In some embodiments, the weight ratio of the resin to the curing agent and the accelerator is 100:(1-3):(0.1-2.5). In some embodiments, the weight ratio of the resin to the curing agent and the accelerator is 100:(1.25-3):(0.1-2.2).

[0027] In certain embodiments, the viscosity of the resin before curing is 400-450 CP·S.

[0028] In certain embodiments, the angle between the basalt fiber and the central axis of the insulating arm is between -5° and 5°, preferably between -1° and 1°.

[0029] In certain embodiments, the angle between the glass fiber and the central axis of the insulating arm is 85°-95°, preferably 88°-92°.

[0030] In certain embodiments, the basalt fibers are distributed in the resin matrix parallel to the central axis of the insulating arm frame, and the glass fibers are evenly distributed in the resin matrix perpendicular to the central axis of the insulating arm frame.

[0031] In certain embodiments, the insulating arm frame further includes a hydrophobic coating, which is disposed on the outer surface of the insulating arm body.

[0032] In certain embodiments, the outer surface of the hollow insulating arm is treated with atmospheric pressure plasma.

[0033] In certain embodiments, the atmospheric-pressure plasma is an atmospheric-pressure plasma formed by argon, carbon dioxide, oxygen, methane, acetylene or air.

[0034] In certain embodiments, the outer surface of the hollow insulating arm is treated with atmospheric pressure plasma at a voltage of 20V to 40V for 10 to 15 minutes.

[0035] In certain embodiments, the insulating arm support further comprises a coating coated on the outer surface of the hollow insulating arm body.

[0036] In certain embodiments, the coating includes an organosilicon material and nano-silicon dioxide.

[0037] In certain embodiments, the coating is formed from a paint.

[0038] The present application also relates to a method for preparing the insulating arm support, comprising:

[0039] 1) Apply release agent on the surface of the core mold;

[0040] 2) The fiber bundle impregnated with resin is laid on the mandrel, wherein basalt fiber is laid (preferably in a direction parallel to the central axis of the mandrel, and the parallelism is allowed to have a deviation of less than 5°), and glass fiber is laid (preferably in a direction perpendicular to the central axis of the mandrel, and the perpendicularity is allowed to have a deviation of less than 5°). One layer of glass fiber is laid for every 1 to 6 layers (preferably 2 to 5 layers, 3 to 4 layers, such as 3 layers, 4 layers or 5 layers) of basalt fiber, and the total thickness of the laid fiber is 12 mm to 17 mm, such as about 14 mm, about 15 mm, or about 16 mm;

[0041] 3) compacting the fiber matrix obtained in 2) using an external mold to discharge excess resin;

[0042] 4) curing, wherein the curing temperature is preferably 80 to 140° C., the curing time is preferably 2 to 4 hours, and more preferably the curing temperature is 90 to 120° C., and the curing time is preferably 2 to 3 hours, to obtain a hollow insulating arm body;

[0043] 5) Optionally, the outer surface of the hollow insulating arm body is smoothed.

[0044] In certain embodiments, the laying tension in step 2) is controlled within a range of 20% to 25% of the fiber strength.

[0045] In certain embodiments, in step 2), the angle between the basalt fiber and the central axis of the core mold is -1° to +1°, and the angle between the glass fiber and the central axis of the mold is 85° to 95°.

[0046] In certain embodiments, the method for preparing the insulating arm support further comprises:

[0047] 6) treating the outer surface of the hollow insulating arm body with atmospheric pressure plasma;

[0048] 7) Spray paint to form a coating on the outer surface of the hollow insulating arm body.

[0049] In certain embodiments, the basalt fiber is a basalt fiber whose surface is treated by atmospheric pressure plasma etching.

[0050] In certain embodiments, the surface of the basalt fiber is preferably etched with atmospheric pressure plasma at a voltage of 20 V to 60 V for a treatment time of 3 s to 10 s.

[0051] In certain embodiments, the coating comprises an organic silicon coating, hydrophobic nano-silica and acetone, preferably the coating is made of an organic silicon coating, hydrophobic nano-silica and acetone.

[0052] In some embodiments, the weight ratio of the organic silicon coating to acetone in the coating is 1:0.8-1.2, for example 1:1. In some embodiments, the amount of hydrophobic nano-silica added to the coating is 1%-5% of the sum of the weight of the organic silicon coating and acetone.

[0053] In certain embodiments, the method for preparing the coating comprises:

[0054] 1) Mix the silicone coating and acetone evenly;

[0055] 2) Add hydrophobic nano-silica to the mixture obtained in 1) and mix well.

[0056] In certain embodiments, in step 2), the hydrophobic nano-silica is uniformly mixed with the mixture obtained in step 1) by stirring at a rotation speed of 200 to 500 rpm (eg, 300 rpm) for 15 to 25 h (eg, 20 h).

[0057] The present application also relates to an aerial work vehicle (eg, an insulated boom vehicle), comprising the insulated boom described in the present application.

[0058] Beneficial technical effects of some embodiments of the present application

[0059] Compared with conventional insulating arms, the insulating arms provided in the embodiments of the present application have significantly improved rigidity and insulation. In particular, the insulating arms of some embodiments of the present application can maintain a high insulation effect after being rained on, thereby effectively improving the reliability of the equipment in complex environments.

[0060] In the present application, the "insulating boom" is a hollow boom profile made of insulating material, whose cross-section can be rectangular or circular, and plays a load-bearing and insulating role. It is used for aerial work vehicles with insulating arms, such as insulated bucket trucks, to achieve safe operation of high-voltage live objects.

[0061] In the present application, the "E-grade glass fiber" is also called alkali-free glass fiber, which refers to glass fiber with an alkali metal oxide content of no more than 1%, preferably glass fiber with an alkali metal oxide content of no more than 0.8%, and further preferably glass fiber with an alkali metal oxide content of no more than 0.5%.

[0062] In the present application, the "organic silicone coating" generally refers to a coating prepared with an organic silicone resin prepared by copolymerization of dichlorosilane and trichlorosilane as a base material, which has excellent oxidation resistance, UV resistance and gloss retention, and is commercially available. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 : is a schematic longitudinal section diagram of the insulating arm metal core mold in the embodiment of the present application, the cross section of which can be circular or rectangular, and the direction parallel to the rotation axis of the core mold is set to 0°, and the direction perpendicular to the rotation axis of the core mold is set to 90°;

[0064] Figure 2 1 is a schematic diagram of the cross-sectional structure of an insulating arm support of an embodiment of the present application, wherein 1 represents a glass fiber layer, and 2 represents a basalt fiber layer, which are alternately laid and wound to form a matrix of the insulating arm support;

[0065] Figure 3 1 is a schematic diagram of the structure of a plasma generator for treating basalt fiber in an embodiment of the present application, wherein 1 represents a high voltage electrode, 2 represents a low voltage electrode, 3 represents quartz glass, 4 represents basalt fiber to be treated, 5 represents incoming gas, and 6 represents outgoing gas. DETAILED DESCRIPTION

[0066] The substantive content of the present application is further described below in conjunction with the specific examples of the present application. It should be understood that the following examples are only used to illustrate the present application, but are not used to limit the scope of protection of the present application. In the following examples, if no specific conditions are specified, they are carried out according to normal conditions or manufacturer recommendations. The raw materials used are not specified by the manufacturer, and are all conventional products that can be obtained commercially.

[0067] Although many materials and operating methods used in the following examples are well known in the art, the present application is still described in as much detail as possible. It is clear to those skilled in the art that the materials and operating methods used in the following examples are well known in the art unless otherwise specified.

[0068] In the embodiment of the present application, the plasma generator used to process the outer surface of the hollow insulating arm body is a low-temperature plasma generator purchased from Nanjing Suman Electronics Co., Ltd., CTP-2000K.

[0069] The longitudinal cross-sectional schematic diagram of the metal core mold of the insulating arm frame used in the embodiment of the present application is as follows Figure 1 As shown, its cross section can be circular or rectangular, and the direction parallel to the rotation axis of the core mold is set to 0°, and the direction perpendicular to the rotation axis of the core mold is set to 90°.

[0070] The schematic diagram of the structure of the plasma generator used to process basalt fiber in the embodiment of the present application is as follows: Figure 3 As shown, 1 represents the high voltage electrode, 2 represents the low voltage electrode, 3 represents the quartz glass, 4 represents the basalt fiber to be treated, 5 represents the incoming gas, and 6 represents the outgoing gas.

[0071] like Figure 2 As shown, an embodiment of the present application provides an insulating arm support, including an insulating arm body, the insulating arm body includes fibers and resin, the fibers include basalt fibers and glass fibers, and the fiber bundles are bonded by resin.

[0072] The rigidity of the insulating arm is improved by combining basalt fiber with glass fiber, and retaining the glass fiber can improve the firmness of the combination of fiber and resin.

[0073] In certain embodiments, the insulating arm frame includes a hollow insulating arm body, and the hollow insulating arm body includes alternately stacked basalt fiber reinforced resin layers and glass fiber reinforced resin layers, and the thickness of the basalt fiber reinforced resin layer is preferably 1 to 6 times, preferably 2 to 5 times, and more preferably 3 to 4 times the thickness of the glass fiber reinforced resin layer. By matching in the above manner, the basalt fiber and the glass fiber are concentrated at a certain thickness to exert their respective advantages.

[0074] In certain embodiments, the number of basalt fiber layers in each basalt fiber reinforced resin layer is n1, the number of glass fiber layers in each glass fiber reinforced resin layer is n2, and n1 / n2 is between 1 and 6, preferably between 2 and 5, such as 2, 3, 4 or 5. The number of fiber layers is set to give full play to the advantages of each fiber.

[0075] In certain embodiments, the surface of the basalt fiber is treated by atmospheric pressure plasma etching.

[0076] In certain embodiments, an insulating arm frame for an aerial work vehicle (e.g., an insulated boom vehicle) is provided, comprising a hollow insulating arm body, wherein the hollow insulating arm body is formed by alternatingly stacking a basalt fiber reinforced resin layer 2 and a glass fiber reinforced resin layer 1, wherein the thickness of the basalt fiber reinforced resin layer 2 is 1 to 6 times the thickness of the glass fiber reinforced resin layer 1, wherein the glass fiber reinforced resin layer 1 is a layered structure with a resin as a matrix and a glass fiber as a skeleton, and the resin matrix and the glass fiber are bonded to form an integral whole; the basalt fiber reinforced resin layer 2 is a layered structure with a resin as a matrix and a basalt fiber as a skeleton, and the resin matrix and the basalt fiber are bonded to form an integral whole, wherein the surface of the basalt fiber is treated by normal pressure plasma etching.

[0077] Compared with pure glass fiber, the use of glass fiber and basalt fiber to form the insulating arm can significantly improve the rigidity and insulation performance of the arm. In addition, after the surface is treated with atmospheric pressure plasma etching, the compatibility of basalt fiber and resin is improved, and the bonding force between basalt fiber and resin is significantly enhanced, which can significantly improve the rigidity and insulation of the insulating arm, better isolate the current, and reduce the risk of leakage and burns.

[0078] In certain embodiments, the surface of the basalt fiber is etched by atmospheric pressure plasma at a voltage of 20V to 60V for a treatment time of 3 to 10 seconds.

[0079] In certain embodiments, the thickness of the basalt fiber reinforced resin layer is 2 to 5 times the thickness of the glass fiber reinforced resin layer.

[0080] In certain embodiments, the thickness of the basalt fiber reinforced resin layer is 3 to 4 times the thickness of the glass fiber reinforced resin layer.

[0081] In certain embodiments, the glass fibers are E-grade glass fibers.

[0082] In some embodiments, the glass fiber meets any one or more of the following conditions: linear density of 2400 tex to 4800 tex, single fiber diameter of 14 to 17 μm, resistivity ≥ 1×10 11Ω·m, moisture content ≤0.10%, combustible content ≤0.5%, elastic modulus ≥75GPa.

[0083] In some embodiments, the basalt fiber meets any one or more of the following conditions: linear density of 2400 tex to 4800 tex, single fiber diameter of 13 to 16 μm, resistivity ≥ 1×10 12 Ω·m, moisture content ≤0.10%, combustible content ≤0.5%, elastic modulus ≥90GPa.

[0084] In certain embodiments, the atmospheric-pressure plasma is an atmospheric-pressure plasma formed by argon, carbon dioxide, oxygen, methane, acetylene or air.

[0085] In certain embodiments, the resin is an epoxy resin or a vinyl ester resin. The epoxy resin is exemplarily selected from Nan Ya NPPN-638S, Shangwei 2513, Phoenix WSR6101, Zhenzhengfeng MF-4101 and other brands of epoxy resins; the vinyl ester resin is exemplarily selected from Aliancys 430, Aliancys 590Z, Shangwei 901, Ineos DM510C-350HOI and other brands of vinyl resins.

[0086] In certain embodiments, the flexural strength of the resin is ≥ 140 MPa.

[0087] In certain embodiments, the curing agent used for curing the resin is an aromatic amine curing agent (such as diaminodiphenyl sulfone, diaminodiphenylmethane), an acid anhydride curing agent (such as methyl nadic anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride) or a peroxide curing agent (such as isobutyl ketone peroxide, cyclohexanone oxide, methyl ethyl ketone peroxide, benzoyl peroxide, isocyanuric acid propylbenzene peroxide), and the reaction accelerator used for curing the resin is cobalt naphthenate, cobalt isooctanoate, dimethylaniline or diethylaniline.

[0088] In certain embodiments, the curing agent is isobutyl ketone peroxide, and the reaction accelerator is cobalt isooctanoate.

[0089] In certain embodiments, the weight ratio of the resin to the curing agent and the accelerator is 100:(0.8-4):(0.05-3). In certain embodiments, the weight ratio of the resin to the curing agent and the accelerator is 100:(1-3):(0.1-2.5). In certain embodiments, the weight ratio of the resin to the curing agent and the accelerator is 100:(1.25-3):(0.1-2.2).

[0090] In some embodiments, the angle between the basalt fiber and the central axis of the insulating arm is -5° to 5°, preferably -1° to 1°. By designing a higher rigidity basalt fiber to be laid in the above direction, the bending stiffness of the insulating arm is greatly improved and its deformation during weighing is reduced.

[0091] In certain embodiments, the angle between the glass fiber and the central axis of the insulating arm is 85°-95°, preferably 88°-92°.

[0092] It should be noted that the positive angles in the above angles represent the angles formed by rotating counterclockwise with the central axis of the insulating arm as the starting line, and the negative angles in the above angles represent the angles formed by rotating clockwise with the central axis of the insulating arm as the starting line.

[0093] In certain embodiments, the basalt fibers are distributed in the resin matrix parallel to the central axis of the insulating arm frame, and the glass fibers are evenly distributed in the resin matrix perpendicular to the central axis of the insulating arm frame.

[0094] In some embodiments, the insulating arm frame further comprises a hydrophobic coating, which is disposed on the outer surface of the insulating arm body. After the hydrophobic coating is disposed, the problem of reduced insulation performance caused by harsh environments such as rain, dew, and frost can be effectively solved, and the safe operation performance of the equipment can be improved. In some embodiments, the outer surface of the hollow insulating arm body is treated with normal pressure plasma.

[0095] In certain embodiments, the atmospheric-pressure plasma is an atmospheric-pressure plasma formed by argon, carbon dioxide, oxygen, methane, acetylene or air.

[0096] In certain embodiments, the outer surface of the hollow insulating arm is treated with atmospheric pressure plasma at a voltage of 20V to 40V for 10 to 15 minutes.

[0097] In certain embodiments, the insulating arm support further comprises a coating coated on the outer surface of the hollow insulating arm body.

[0098] After the outer surface of the hollow insulating arm body is treated with normal pressure plasma, the bonding performance between the outer surface and the coating is enhanced, thereby improving the hydrophobic effect of the coating.

[0099] In certain embodiments, the coating comprises an organosilicon material and nano-silicon dioxide, and the nano-silicon dioxide is preferably hydrophobic nano-silicon dioxide. The organosilicon material has excellent oxidation resistance, UV resistance and light retention, thus improving the weather resistance of the insulating arm frame.

[0100] In certain embodiments, a coating is formed.

[0101] The present application also provides a method for preparing the insulating arm support, comprising:

[0102] 1) Apply release agent on the surface of the core mold;

[0103] 2) The fiber bundle impregnated with resin is laid on the mandrel, wherein basalt fiber is laid (preferably in a direction parallel to the central axis of the mandrel, and the parallelism is allowed to have a deviation of less than 5°), and glass fiber is laid (preferably in a direction perpendicular to the central axis of the mandrel, and the perpendicularity is allowed to have a deviation of less than 5°). One layer of glass fiber is laid for every 1 to 6 layers (preferably 2 to 5 layers, 3 to 4 layers, such as 3 layers, 4 layers or 5 layers) of basalt fiber, and the total thickness of the laid fiber is 12 mm to 17 mm, such as about 14 mm, about 15 mm, or about 16 mm;

[0104] 3) compacting the fiber matrix obtained in 2) using an external mold to discharge excess resin;

[0105] 4) curing, wherein the curing temperature is preferably 80 to 140° C., the curing time is preferably 2 to 4 hours, and more preferably the curing temperature is 90 to 120° C., and the curing time is preferably 2 to 3 hours, to obtain a hollow insulating arm body;

[0106] 5) Optionally, the outer surface of the hollow insulating arm body is smoothed.

[0107] In certain embodiments, the viscosity of the resin before curing is 400-450 CP·S.

[0108] In certain embodiments, the laying tension in step 2) is controlled within a range of 20% to 25% of the fiber strength.

[0109] In certain embodiments, in step 2), the angle between the basalt fiber and the central axis of the core mold is -1° to +1°, and the angle between the glass fiber and the central axis of the mold is 85° to 95°.

[0110] In certain embodiments, the basalt fiber is a basalt fiber whose surface is treated with atmospheric pressure plasma etching, that is, before being impregnated with resin, the basalt fiber is treated with atmospheric pressure plasma etching to enhance the bonding performance between its outer surface and the resin, which can significantly improve the rigidity and insulation of the insulating arm.

[0111] In certain embodiments, the surface of the basalt fiber is etched with atmospheric pressure plasma at a voltage of 20V to 60V for a treatment time of 3s to 10s.

[0112] In certain embodiments, the method for preparing the insulating arm support further comprises:

[0113] 6) treating the outer surface of the hollow insulating arm body with atmospheric pressure plasma;

[0114] 7) Spray paint to form a coating on the outer surface of the hollow insulating arm body.

[0115] In certain embodiments, the coating comprises an organic silicon coating, hydrophobic nano-silica and acetone; preferably, the coating is made of an organic silicon coating, hydrophobic nano-silica and acetone.

[0116] In some embodiments, the weight ratio of the organic silicon coating to acetone in the coating is 1:0.8-1.2, for example 1:1. In some embodiments, the amount of hydrophobic nano-silica added to the coating is 1%-5% of the sum of the weight of the organic silicon coating and acetone.

[0117] In certain embodiments, the method for preparing the coating comprises:

[0118] 1) Mix the silicone coating and acetone evenly;

[0119] 2) Add hydrophobic nano-silica to the mixture obtained in 1) and mix well.

[0120] In certain embodiments, in step 2), the hydrophobic nano-silica is uniformly mixed with the mixture obtained in step 1) by stirring at a rotation speed of 200 to 500 rpm (eg, 300 rpm) for 15 to 25 h (eg, 20 h).

[0121] The embodiment of the present application also provides an aerial work vehicle (such as an insulated boom vehicle), including the insulating boom described in the present application. The boom of the aerial work vehicle has good rigidity and high insulation, and can maintain a high insulation effect after being rained on.

[0122] Example 1

[0123] 1. Prepare the ingredients

[0124] The reinforcing fibers are glass fiber and basalt fiber. The glass fiber is E-grade glass fiber with a linear density of 2400tex, a single fiber diameter of 16μm, and a resistivity of 1.2×10 11 Ω·m, moisture content of 0.10%, combustible content of 0.5%, elastic modulus of 75GPa (purchased from Taian Jufusheng New Materials Co., Ltd., Taishan Fiberglass TCR910-2400-17); basalt fiber linear density of 2400tex, single fiber diameter of 16μm, resistivity of 5.5×10 12 Ω·m, moisture content of 0.10%, combustible content of 0.5%, elastic modulus of 97GPa (purchased from Guizhou Shixin Basalt Technology Co., Ltd., roving 2400tex). Before use, the surface of basalt fiber was etched with atmospheric pressure oxygen plasma, with a treatment voltage of 20V and a time of 10s.

[0125] The resin is Aliancys 590Z, the curing agent is isobutyl ketone peroxide, the accelerator is cobalt isooctanoate, and the weight ratio of the resin, the curing agent, and the accelerator is 100:2:1.2.

[0126] The hydrophobic self-cleaning coating is made of organic silicon coating, hydrophobic nano-silica and acetone. The preparation method is: the organic silicon coating (purchased from Langfang Xiangteng Chemical Co., Ltd.) and acetone are mixed and stirred evenly in a weight ratio of 1:1, 1% by weight of hydrophobic nano-silica powder is added to the obtained mixture, and the mixture is stirred at a speed of 300 rpm for 20 hours to obtain the hydrophobic self-cleaning coating.

[0127] 2. Preparation of Insulating Arm

[0128] 1) Install the metal core mold on the laying and wrapping machine, and evenly apply the release agent on the surface to ensure that the arm can be easily demoulded after forming;

[0129] 2) Mix the resin, curing agent and accelerator in a specified proportion through an automatic glue dispensing machine and inject them into the glue tank for use in impregnating the fiber tow;

[0130] 3) Using a laying and winding integrated machine, the resin-impregnated fiber bundle is laid on the metal core mold according to the set winding angle and layer thickness. The laying tension is controlled at 20% of the fiber strength. The basalt fiber is laid along the center axis direction of the mold (i.e., the longitudinal section direction), and the laying angle is 0°; the glass fiber is laid along the direction perpendicular to the center axis of the mold (i.e., the cross-sectional direction), and the laying angle is 90°. The basalt fiber and the glass fiber are laid alternately, and 1 layer of glass fiber is laid for every 4 layers of basalt fiber, for a total of 7 cycles, of which 28 layers of basalt fiber are laid and 7 layers of glass fiber are laid, with a total thickness of about 15 mm;

[0131] 4) using an outer mold to compact and lock the fiber matrix sample obtained in step 3) as a whole, and discharge excess resin;

[0132] 5) The sample obtained in step 4) is moved as a whole into an oven for curing at a temperature of 95° C. for a curing time of 2.5 h;

[0133] 6) Take the cured sample out of the mold and polish and trim the burrs, bumps and uneven parts on the surface;

[0134] 7) The sample obtained in step 6) was surface treated using atmospheric pressure carbon dioxide plasma at a treatment voltage of 30 V for 10 min, and then a hydrophobic self-cleaning coating was sprayed to form a hydrophobic coating with a thickness of 150 μm. After drying, the insulating arm of the present embodiment was obtained.

[0135] Example 2

[0136] 1. Prepare the ingredients

[0137] The reinforcing fibers are glass fiber and basalt fiber. The glass fiber is E-grade glass fiber with a linear density of 4800tex, a single fiber diameter of 16μm, and a resistivity of 1.5×10 11 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 79GPa (purchased from Taian Jufusheng New Materials Co., Ltd., Taishan EDR480); basalt fiber linear density 4800tex, single fiber diameter 16μm, resistivity 5.5×10 12 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 99GPa (purchased from Guizhou Shixin Basalt Technology Co., Ltd., roving 4800tex). Before use, the surface of the basalt fiber was etched with atmospheric pressure methane plasma, with a treatment voltage of 60V and a time of 3s.

[0138] The resin is INEOS DM510C-350HOI, the curing agent is isobutyl ketone peroxide, the accelerator is cobalt isooctanoate, and the weight ratio of the resin, the curing agent and the accelerator is 100:1.25:0.1.

[0139] The hydrophobic self-cleaning coating is made of organic silicon coating, hydrophobic nano-silicon dioxide and acetone. The preparation method is: the organic silicon coating and acetone are mixed and stirred evenly in a weight ratio of 1:1, 3% by weight of hydrophobic nano-silicon dioxide powder is added to the obtained mixture, and the mixture is stirred at a speed of 300 rpm for 20 hours to obtain the hydrophobic self-cleaning coating.

[0140] 2. Preparation of Insulating Arm

[0141] 1) Install the metal core mold on the laying and wrapping machine, and evenly apply the release agent on the surface to ensure that the arm can be easily demoulded after forming;

[0142] 2) Mix the resin, curing agent and accelerator in a specified proportion through an automatic glue dispensing machine and inject them into the glue tank for use in impregnating the fiber tow;

[0143] 3) Using a laying and winding integrated machine, the resin-impregnated fiber bundle is laid on the metal core mold according to the set winding angle and layer thickness. The laying tension is controlled at 22% of the fiber strength. The basalt fiber is laid along the center axis direction of the mold (i.e., the longitudinal section direction), and the laying angle is 0°; the glass fiber is laid along the direction perpendicular to the center axis of the mold (i.e., the cross-sectional direction), and the laying angle is 90°. The basalt fiber and the glass fiber are laid alternately, and 1 layer of glass fiber is laid for every 4 layers of basalt fiber, for a total of 7 cycles, of which 28 layers of basalt fiber are laid and 7 layers of glass fiber are laid, with a total thickness of about 15 mm;

[0144] 4) using an outer mold to compact and lock the fiber matrix sample obtained in step 3) as a whole, and discharge excess resin;

[0145] 5) The sample obtained in step 4) is moved as a whole into an oven for curing at a temperature of 95° C. for a curing time of 2.5 h;

[0146] 6) Take the cured sample out of the mold and polish and trim the burrs, bumps and uneven parts on the surface;

[0147] 7) The sample obtained in step 6) was surface treated using atmospheric pressure carbon dioxide plasma at a treatment voltage of 20 V for 15 min, and then a hydrophobic self-cleaning coating was sprayed to form a hydrophobic coating with a thickness of 150 μm. After drying, the insulating arm of the present embodiment was obtained.

[0148] Example 3

[0149] 1. Prepare the ingredients

[0150] The reinforcing fibers are glass fiber and basalt fiber. The glass fiber is E-grade glass fiber with a linear density of 4800tex, a single fiber diameter of 17μm, and a resistivity of 2.5×10 11 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 80GPa (purchased from Chongqing International Composite Materials Co., Ltd., roving 4800tex); basalt fiber linear density 4800tex, single fiber diameter 14μm, resistivity 3.5×10 12 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 97GPa (purchased from Sichuan Tianrun Basalt Technology Co., Ltd., roving 4800tex). Before use, the surface of the basalt fiber was etched with atmospheric pressure air plasma, with a treatment voltage of 40V and a time of 7s.

[0151] The resin is Nan Ya NPPN-638S, the curing agent is isobutyl ketone peroxide, the accelerator is cobalt isooctanoate, and the weight ratio of the resin, the curing agent, and the accelerator is 100:3:2.2.

[0152] The hydrophobic self-cleaning coating is made of organic silicon coating, hydrophobic nano-silicon dioxide and acetone. The preparation method is: the organic silicon coating and acetone are mixed and stirred evenly in a weight ratio of 1:1, 5% by weight of hydrophobic nano-silicon dioxide powder is added to the obtained mixture, and the mixture is continuously stirred at a speed of 300 rpm for 20 hours to obtain the hydrophobic self-cleaning coating.

[0153] 2. Preparation of Insulating Arm

[0154] 1) Install the metal core mold on the laying and wrapping machine, and evenly apply the release agent on the surface to ensure that the arm can be easily demoulded after forming;

[0155] 2) Mix the resin, curing agent and accelerator in a specified proportion through an automatic glue dispensing machine and inject them into the glue tank for use in impregnating the fiber tow;

[0156] 3) Using a laying and winding integrated machine, the resin-impregnated fiber bundle is laid on the metal core mold according to the set winding angle and layer thickness. The laying tension is controlled at 25% of the fiber strength. The basalt fiber is laid along the center axis direction of the mold (i.e., the longitudinal section direction), and the laying angle is 0°; the glass fiber is laid along the direction perpendicular to the center axis of the mold (i.e., the cross-sectional direction), and the laying angle is 90°. The basalt fiber and the glass fiber are laid alternately, and 1 layer of glass fiber is laid for every 4 layers of basalt fiber, for a total of 7 cycles, of which 28 layers of basalt fiber are laid and 7 layers of glass fiber are laid, with a total thickness of about 15 mm;

[0157] 4) using an outer mold to compact and lock the fiber matrix sample obtained in step 3) as a whole, and discharge excess resin;

[0158] 5) The sample obtained in step 4) is moved as a whole into an oven for curing at a temperature of 105° C. for a curing time of 2 h;

[0159] 6) Take the cured sample out of the mold and polish and trim the burrs, bumps and uneven parts on the surface;

[0160] 7) The sample obtained in step 6) was surface treated using atmospheric pressure carbon dioxide plasma at a treatment voltage of 40 V for 15 min, and then a hydrophobic self-cleaning coating was sprayed to form a hydrophobic coating with a thickness of 150 μm. After drying, the insulating arm of the present embodiment was obtained.

[0161] Example 4

[0162] The insulating arm support of Example 4 is different from that of Example 1 only in that the surface of the basalt fiber is not etched, and the other raw material processes are the same as those of Example 1.

[0163] Example 5

[0164] The insulating arm support of Example 5 is different from that of Example 1 only in that before spraying the hydrophobic self-cleaning coating, the sample obtained in step 6) is not subjected to surface treatment, but is directly sprayed with the hydrophobic self-cleaning coating.

[0165] Comparative Example 1

[0166] The insulating arm of comparative example 1 is different from that of embodiment 1 in that the reinforcing fiber raw material is different. The surface of the insulating arm of comparative example 1 is made of E-grade glass fiber (linear density 2400tex, single fiber diameter 16μm, resistivity 1.2×10 11Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 75GPa) instead of basalt fiber with etched surface (linear density 2400tex, single fiber diameter 16μm, resistivity 5.5×10 12 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 97GPa), etching treatment and other raw material processes are consistent with Example 1. When laying the fiber, the E-grade glass fiber with the etched surface is laid along the central axis direction of the mold (i.e., the longitudinal section direction), and the laying angle is 0°; the E-grade glass fiber with the unetched surface is laid along the direction perpendicular to the central axis of the mold (i.e., the cross-sectional direction), and the laying angle is 90°. The E-grade glass fiber with the etched surface and the unetched glass fiber are laid alternately, and 4 layers of the E-grade glass fiber with the etched surface are laid and 1 layer of the unetched glass fiber is laid, for a total of 7 cycles, wherein 28 layers of the E-grade glass fiber with the etched surface are laid, and 7 layers of the unetched glass fiber are laid, with a total thickness of about 15 mm.

[0167] Comparative Example 2

[0168] The insulating arm of comparative example 2 is different from that of example 1 in that the reinforcing fiber raw material is different. The basalt fiber (linear density 2400tex, single fiber diameter 16μm, resistivity 5.5×10 12 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 97GPa) instead of E-grade glass fiber (linear density 2400tex, single fiber diameter 16μm, resistivity 1.2×10 11 Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 75GPa), and other raw materials and processes are consistent with Example 1. When laying the fibers, the basalt fibers with etched surfaces are laid along the central axis direction of the mold (i.e., the longitudinal section direction), and the laying angle is 0°, and the basalt fibers with unetched surfaces are laid along the direction perpendicular to the central axis of the mold (i.e., the cross-sectional direction), and the laying angle is 90°. The basalt fibers with etched surfaces and the basalt fibers without etched surfaces are laid alternately, and 1 layer of basalt fibers without etched surfaces is laid for every 4 layers of basalt fibers with etched surfaces, for a total of 7 cycles, wherein 28 layers of basalt fibers with etched surfaces are laid, and 7 layers of basalt fibers without etched surfaces are laid, with a total thickness of about 15 mm.

[0169] Comparative Example 3

[0170] The insulating arm of comparative example 3 is different from that of embodiment 1 in that the reinforcing fiber raw material is different, and only one kind of E-grade glass fiber (linear density 2400tex, single fiber diameter 16μm, resistivity 1.2×10 11Ω·m, moisture content 0.10%, combustible content 0.5%, elastic modulus 75GPa) as reinforcing fiber, and the surface is not etched, and a conventional winding method is adopted (the 0° winding is replaced by ±15° winding, and the other winding methods are the same as those in Example 1, that is, 4 layers of ±15° winding, 1 layer of 90° winding, and this cycle is repeated 7 times, including 28 layers of ±15° winding, 7 layers of 90° winding, and the total thickness of the layers is 15mm.), and the hydrophobic self-cleaning coating is not sprayed. Other material processes are the same as those in Example 1.

[0171] Experimental example

[0172] The bending resistance and insulation performance tests were performed on the insulating arms prepared in the above embodiments and comparative examples. The results are shown in Table 1.

[0173] Table 1 Comparison of arm performance prepared in the present embodiment and the comparative example

[0174]

[0175] The results show that compared with pure glass fiber, the use of a combination of glass fiber and basalt fiber can significantly improve the stiffness and insulation performance of the arm (Example vs. Comparative Examples 1 and 3); due to the large rigidity of basalt fiber and the poor bonding strength between it and the resin, it is easy to delaminate between the fiber and the resin, and it cannot be used alone as an insulating arm material (Comparative Example 2); the basalt fiber that has not been etched has poor compatibility with the resin and poor bonding strength with the resin, and has limited improvement in the rigidity and insulation of the arm (Example 4); in the arm that has not been treated with plasma surface treatment, the rigidity and insulation of the arm are improved. The surface is sprayed with a hydrophobic coating, but the bonding performance is poor and it cannot achieve a good hydrophobic effect. After the arm is naturally dried for 3 hours after being exposed to rain, the insulation performance decreases significantly (Example 5), but other properties are excellent relative to the control example; the arrangement angle of the fibers, the selection of the fiber materials, and the use of the hydrophobic coating all affect the rigidity and insulation performance of the arm. Compared with the conventional insulating arm, the insulating arm of the embodiment of the present application has significantly improved rigidity and insulation performance. In particular, the insulating arm of the embodiment of the present application can maintain a high insulation effect after being exposed to rain, thereby effectively improving the reliability of the equipment in a complex environment.

[0176] Although the specific embodiments of the present application have been described in detail, those skilled in the art will understand that, based on all the teachings disclosed, various modifications and substitutions can be made to those details, and these changes are within the scope of protection of the present application. The full scope of the present application is given by the attached claims and any equivalents thereof.

Claims

1. An insulating arm support, comprising an insulating arm body, wherein the insulating arm body comprises fibers and resin, wherein the fibers comprise basalt fibers and glass fibers, and the fiber bundles are bonded by resin.

2. The insulating arm support according to claim 1, wherein: The insulating arm frame includes a hollow insulating arm body, and the hollow insulating arm body includes alternately stacked basalt fiber reinforced resin layers and glass fiber reinforced resin layers, and the thickness of the basalt fiber reinforced resin layer is preferably 1 to 6 times, preferably 2 to 5 times, and more preferably 3 to 4 times the thickness of the glass fiber reinforced resin layer; Preferably, the number of basalt fiber layers in each basalt fiber reinforced resin layer is n1, the number of glass fiber layers in each glass fiber reinforced resin layer is n2, and n1 / n2 is between 1-6, preferably between 2-5.

3. The insulating arm support according to claim 1 or 2, wherein: The invention comprises a hollow insulating arm body, wherein the hollow insulating arm body is formed by alternately stacking basalt fiber reinforced resin layers and glass fiber reinforced resin layers, wherein the thickness of the basalt fiber reinforced resin layers is 1 to 6 times the thickness of the glass fiber reinforced resin layers, wherein the glass fiber reinforced resin layers are a layered structure with resin as a matrix and glass fiber as a skeleton, and the resin matrix and the glass fiber are bonded into an integral whole; wherein the basalt fiber reinforced resin layers are a layered structure with resin as a matrix and basalt fiber as a skeleton, and the resin matrix and the basalt fiber are bonded into an integral whole, wherein the surface of the basalt fiber is treated by atmospheric pressure plasma etching.

4. The insulating arm support according to claim 1 or 2, wherein the surface of the basalt fiber is treated by atmospheric pressure plasma etching.

5. The insulating arm support according to any one of claims 1 to 4, wherein the surface of the basalt fiber is etched by atmospheric pressure plasma at a voltage of 20V to 60V for a processing time of 3s to 10s.

6. The insulating arm support according to any one of claims 1 to 5, wherein the glass fiber is E-grade glass fiber, Preferably, the glass fiber meets any one or more of the following conditions: Linear density is 2400tex~4800tex, single fiber diameter is 14~17μm, resistivity ≥1×10 11 Ω·m, moisture content ≤0.10%, combustible content ≤0.5%, elastic modulus ≥75GPa.

7. The insulating arm support according to any one of claims 1 to 6, wherein the basalt fiber wire meets any one or more of the following conditions: density of 2400 tex to 4800 tex, single fiber diameter of 13 to 16 μm, resistivity ≥ 1×10 12 Ω·m, moisture content ≤0.10%, combustible content ≤0.5%, elastic modulus ≥90GPa.

8. The insulating arm support according to any one of claims 3 to 5, wherein the atmospheric pressure plasma is atmospheric pressure plasma formed by argon, carbon dioxide, oxygen, methane, acetylene or air.

9. The insulating arm support according to any one of claims 1 to 8, wherein the resin comprises epoxy resin and / or vinyl ester resin.

10. The insulating arm support according to any one of claims 1 to 9, wherein the bending strength of the resin is ≥ 140 MPa.

11. The insulating arm support according to any one of claims 1 to 10, wherein the curing agent used for curing the resin is an aromatic amine curing agent (such as diaminodiphenyl sulfone, diaminodiphenylmethane), an acid anhydride curing agent (such as methyl nadic anhydride, methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride) or a peroxide curing agent (such as isobutyl ketone peroxide, cyclohexanone oxide, methyl ethyl ketone peroxide, benzoyl peroxide, isocyanopropyl peroxide), and the reaction accelerator used for curing the resin is cobalt naphthenate, cobalt isooctanoate, dimethylaniline or diethylaniline, Preferably, the curing agent is isobutyl ketone peroxide, and the reaction accelerator is cobalt isooctanoate.

12. The insulating arm support according to claim 11, wherein the weight ratio of the resin to the curing agent and the accelerator is 100:(0.8-4):(0.05-3), preferably 100:(1-3):(0.1-2.5), and more preferably 100:(1.25-3):(0.1-2.2).

13. The insulating arm support according to any one of claims 1 to 12, wherein the angle between the basalt fiber and the central axis of the insulating arm support is -5° to 5°, preferably -1° to 1°.

14. The insulating arm support according to any one of claims 1 to 13, wherein the angle between the glass fiber and the central axis of the insulating arm support is 85°-95°, preferably 88°-92°.

15. The insulating arm support according to any one of claims 1 to 14, wherein the basalt fibers are distributed in the resin matrix parallel to the central axis of the insulating arm support, and the glass fibers are evenly distributed in the resin matrix perpendicular to the central axis of the insulating arm support.

16. The insulating arm support according to any one of claims 1 to 15, wherein the insulating arm support further comprises a hydrophobic coating, wherein the hydrophobic coating is disposed on an outer surface of the insulating arm body.

17. The insulating arm support according to any one of claims 1 to 16, wherein the outer surface of the hollow insulating arm body is treated by normal pressure plasma. Preferably, the atmospheric pressure plasma is atmospheric pressure plasma formed by argon, carbon dioxide, oxygen, methane, acetylene or air. Preferably, the outer surface of the hollow insulating arm body is treated with normal pressure plasma at a voltage of 20V to 40V for a treatment time of 10min to 15min.

18. The insulating arm support according to claim 16, wherein the coating comprises an organic silicon material and nano-silicon dioxide, and preferably the nano-silicon dioxide is hydrophobic nano-silicon dioxide.

19. The insulating arm support according to claim 16 or 18, wherein the coating is formed by a paint; Preferably, the coating comprises organic silicon coating, hydrophobic nano-silicon dioxide and acetone; Preferably, the weight ratio of the organic silicon coating to acetone is 1:0.8-1.2, for example 1:1, and the amount of hydrophobic nano-silica added is 1%-5% of the sum of the weight of the organic silicon coating and acetone; Preferably, the method for preparing the coating comprises: 1) Mix the silicone coating and acetone evenly; 2) Add hydrophobic nano-silica to the mixture obtained in 1) and mix well.

20. A method for preparing the insulating arm support according to any one of claims 1 to 19, comprising: 1) Apply release agent on the surface of the core mold; 2) laying and winding the fiber bundle impregnated with resin on the mandrel, wherein basalt fiber and glass fiber are laid, and one layer of glass fiber is laid for every 1 to 6 layers (preferably 2 to 5 layers, 3 to 4 layers, such as 3 layers, 4 layers or 5 layers) of basalt fiber, and the total thickness of the laying and winding is 12 mm to 17 mm, such as about 14 mm, about 15 mm, about 16 mm; Preferably, the laying tension is controlled at 20% to 25% of the fiber strength; Preferably, the angle between the basalt fiber and the central axis of the core mold is -1° to +1°, and the angle between the glass fiber and the central axis of the mold is 85° to 95°; 3) compacting the fiber matrix obtained in 2) using an external mold to discharge excess resin; 4) curing, wherein the curing temperature is preferably 80 to 140° C., the curing time is preferably 2 to 4 hours, and more preferably the curing temperature is 90 to 120° C., and the curing time is preferably 2 to 3 hours, to obtain a hollow insulating arm body; 5) Optionally, the outer surface of the hollow insulating arm body is smoothed.

21. The method of claim 20, wherein: The basalt fiber is a basalt fiber with a surface treated by atmospheric pressure plasma etching; Preferably, the surface of the basalt fiber is etched by atmospheric pressure plasma at a voltage of 20V to 60V for a processing time of 3s to 10s.

22. The method of claim 20 or 21, wherein the method further comprises: 6) treating the outer surface of the hollow insulating arm body with atmospheric pressure plasma; 7) Spray paint to form a coating on the outer surface of the hollow insulating arm body.

23. The method of claim 22, wherein the coating comprises silicone coating, hydrophobic nano-silica and acetone; Preferably, the weight ratio of the organic silicon coating to acetone is 1:0.8-1.2, for example 1:1, and the amount of hydrophobic nano-silica added is 1%-5% of the sum of the weight of the organic silicon coating and acetone; Preferably, the preparation method comprises: 1) Mix the silicone coating and acetone evenly; 2) Add hydrophobic nano-silica to the mixture obtained in 1) and mix well.

24. An aerial work vehicle (such as an insulated boom vehicle), comprising the insulating boom according to any one of claims 1 to 19.

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