Power cable insulation protection tube structure enhancement and damage repair process

Abstract

The invention relates to the technical field of power cables, in particular to a power cable insulation protection tube structure enhancement and damage repair process, which comprises the following steps: preparing a protection tube and fixing glue; comprising the following steps that 1, heterogenous aramid fibers are woven and wound on the outer wall of a protection pipe, and carbon fibers are woven and wound on a heterogenous aramid woven layer; step 2, putting the protection tube wound with the anisotropic aramid fiber braid layer and the carbon fiber braid layer into a curing oven for heating and curing; 3, the carbon fiber braid layer is coated with a first component, the carbon fiber braid layer is coated with the first component, and the first component coating is sprayed with a second component; 4, the fixing glue is subjected to curing treatment; 5, when the protection tube is damaged, dark spots appear on the damaged fluorescent layer, and the damaged position can be conveniently positioned; and 6, the dark spots of the fluorescent layer in the step 5 are coated with the fixing glue again, and the fixing glue which is coated again is cured under natural sunlight, temperature and air pressure.

Description

Technical Field

[0001] The invention relates to the technical field of power cables, and in particular to an insulating protection tube. Background Art

[0002] Traditional materials for protective tubes are generally CPVC and PVC. Such protective tubes are prone to aging and embrittlement under harsh environments such as long-term ultraviolet radiation, temperature changes, and chemical corrosion, resulting in a decrease in mechanical strength, thereby increasing maintenance costs and safety risks. In densely populated areas such as residential areas, damage to power pipes and protective tubes not only affects the daily lives of residents, but may also cause electric shock accidents, resulting in casualties and property losses. In addition, PVC materials have poor impact resistance. Once impacted by external forces, they are prone to breakage, and it takes a lot of time to find the broken location during repair.

[0003] To solve these problems, it is necessary to improve the pressure resistance, corrosion resistance, wear resistance and insulation performance of the protective tube material, and when the protective tube is damaged, it is necessary to facilitate maintenance personnel to find the damaged location and repair it. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: The structural reinforcement and damage repair process of the power cable insulation protection tube requires first preparing the protection tube and fixing glue.

[0007] The fixing glue comprises two components, a first component and a second component; The first component includes polydimethylsiloxane, methyltriethoxysilane, white carbon black and tetraethoxysilane; The second component includes a catalyst, an accelerator, and a tackifier; adding a graphene oxide-europium oxide composite to the first component; The first component is also doped with glass fiber mesh in a fragmented form, and the glass fiber mesh in a fragmented form is used as a filler; The glass fiber mesh comprises a mesh body and expanded glass fibers, the mesh body is woven with warp and weft, and both the warp and weft are made of glass fibers; The lengths of at least part of the warp threads and at least part of the weft threads are beyond the mesh body to form expanded glass fibers; A pair of auxiliary curing devices for accelerating the curing of the fixing glue are also prepared, and the auxiliary curing devices include an electromagnetic transmitter; The following steps are involved: Step 1, weaving and winding the heteroaramid fiber on the outer wall of the protection tube to form a heteroaramid braided layer, and weaving and winding the carbon fiber on the heteroaramid braided layer to form a carbon fiber braided layer; Step 2, after the carbon fiber braided layer is wound, the protective tube wound with the anisotropic aramid braided layer and the carbon fiber braided layer is placed in a curing furnace for heating and curing. After the curing of the anisotropic aramid braided layer and the carbon fiber braided layer is completed, the protective tube wound with the anisotropic aramid braided layer and the carbon fiber braided layer is polished and cleaned; Step 3, coating the first component on the carbon fiber braided layer, the first component is coated on the carbon fiber braided layer, and the second component is sprayed on the first component coating; Step 4, curing the fixing glue, irradiating the area where the fixing glue is coated with an electromagnetic transmitter to excite the graphene oxide-europium oxide complex to fluoresce, and the fluorescence causes the fixing glue containing tetraethoxysilane to be photocured to form a strong network structure, and the first component and the second component of the fixing glue undergo a condensation reaction to form a strong chemical bond on the surface of the first component, so that the surface of the fixing glue has excellent structural strength, and the fixing glue is cured to form a composite material structure; Control the curing temperature to 25-45°C, at 0.1-0.2MPa, the curing time is 20-30 hours; Step 5: When the protective tube prepared in step 4 is used to protect the power cable, the fixing glue added with the graphene oxide-europium oxide composite has a fluorescent property, and a fluorescent layer is formed on the surface of the protective tube. When the protective tube is damaged, the fluorescent layer is damaged to form dark spots, and the damaged position is located by the dark spots; Step 6: Re-apply the first component of the fixing glue on the dark spots of the fluorescent layer in step 5, and spray the second component on the first component coating. The re-applied fixing glue is cured under natural sunlight, temperature and air pressure.

[0008] In the above design, the protective tube in step 1 has structural layers of heteroaramid braided layers and carbon fiber braided layers. Aramid is a high-performance fiber with extremely high strength and heat resistance, while carbon fiber is known for its excellent mechanical properties and light weight. The protective tube has structural layers of heteroaramid braided layers and carbon fiber braided layers. The protective tube not only has excellent mechanical properties, but also has good insulation and corrosion resistance. The heteroaramid braided layers and carbon fiber braided layers can also effectively block sunlight and extend the service life of the protective tube made of CPVC or PVC materials. Due to the high strength and impact resistance of the protective tube made of heteroaramid braided layers and carbon fiber braided layers, the protective tube is not easily damaged during transportation and installation, reducing losses during construction. While ensuring that the number of fiber meshes is moderate, ensure that the expanded glass fibers are interlaced with each other as much as possible to form a three-dimensional mesh structure to improve the overall strength.

[0009] In step 3 and step 4, a layer of fixing glue is coated on the surface of the carbon fiber braided layer. The fixing glue can not only bond the carbon fiber braided layer, the anisotropic aramid braided layer and the outer surface of the protective tube into one.

[0010] Graphene oxide-europium oxide complex is added to the first component. Tetraethoxysilane is a cross-linking agent or bridging agent, which makes the fixed glue have a light-curing effect. When the first component is excited by the electromagnetic radiation generated by the electromagnetic emitter, europium oxide is cross-linked under the fluorescence irradiation to form a strong network structure. The graphene oxide-europium oxide complex can also improve the mechanical strength and toughness of the fixed glue, making it more durable.

[0011] Through condensation reaction (condensation reaction is a reaction in which two or more organic molecules interact with each other and are combined into a large molecule by covalent bonds, and is often accompanied by the loss of small molecules such as water, hydrogen chloride, alcohol, etc.), a strong chemical bond can be formed, so that the fixing glue has excellent adhesion and structural strength when connecting materials. Tetraethoxysilane is a cross-linking agent, also known as a bridging agent, which can form silicone polymers through hydrolysis and condensation reactions. These polymers can be cross-linked under electromagnetic radiation to form a strong network structure, making the fixing glue have a light-curing effect. White carbon black has a good thickening effect and can increase the viscosity of the fixing glue. Adding white carbon black can enhance the mechanical strength of the fixing glue and improve the firmness of the bond. Especially when the fixing glue is cured, white carbon black can provide additional support as a filling material.

[0012] The chemical reaction formula of the condensation reaction is: (CH3)3Si-O-Si(CH3)3 + H2O → (CH3)3Si-OH + (CH3)3SiOH; (CH3)3Si-OH + CH3Si(OCH2CH3)3 → (CH3)3Si-O-Si(CH3)(OCH2CH3)3.

[0013] The coating surface of the first component reacts with the second component to form a coating layer. This fixing glue that combines light curing and chemical condensation has a supporting network structure inside. The surface of the fixing glue has excellent structural strength, wear resistance and good integrity, which can improve the structural strength and durability of the cured fixing glue, thereby further improving the protection strength of the protective tube.

[0014] Control the curing temperature to 25-45°C, the curing time to 20-30 hours at 0.1-0.2MPa, to ensure that the fixing glue is completely cured and the cured structure is uniform and stable, and to improve the stability of the structure formed by the fixing glue; Step 5 and Step 6: If the protective tube is damaged during use, the fluorescent layer generated by the graphene oxide-europium oxide composite absorbing sunlight can quickly find the damaged position through the dark spots on the fluorescent layer, and the re-applied fixing glue is cured under natural sunlight, temperature and air pressure. The coating repair can be simple and fast.

[0015] The fiberglass mesh retains expanded glass fibers. The beneficial effect of the expanded glass fibers is that, while ensuring a moderate amount of fiber mesh, the expanded glass fibers are staggered as much as possible to form a three-dimensional mesh structure, thereby improving the overall strength and the structural strength of the protective tube when the damaged part is repaired with fixing glue.

[0016] Furthermore, the diameter of the glass fibers of the glass fiber mesh is 5.5-9.5 μm; the area of ​​the mesh is 0.45-1.95 mm 2 , mesh area is 0.01-0.18mm 2 The length of the expanded glass fiber is 0.45-2.05mm. In terms of volume, there are 3-6 glass fiber meshes per cubic centimeter. The 6-9μm glass fiber mesh has good softness and a certain toughness. The area of ​​the mesh is 0.5-2mm 2 The formed fragmented glass fiber mesh is not easy to be tangled into a ball after being mixed into the polymer moisture-proof plugging glue as filler. The mesh area is 0.01-0.19mm 2 , allowing polydimethylsiloxane to pass through the mesh and bond more strongly to the glass fiber mesh; the length of the expanded glass fiber is 0.45-2.05mm, and there are 3-6 glass fiber meshes per cubic centimeter, ensuring that the expanded glass fibers are intertwined as much as possible to form a three-dimensional network structure, thereby improving the structural strength of the fixing glue after curing.

[0017] Preferably, when drawing, the glass fiber as one of the warp and weft is in a molten state and passes through a space where ferroferric oxide powder dust is floating in the air to adhere to ferroferric oxide powder, and the particle size of the ferroferric oxide powder is 0.45-0.25 μm; when drawing, the glass fiber as the other of the warp and weft is in a molten state and passes through a space where ferroferric oxide powder dust is floating in the air to adhere to graphite powder, and the particles of the graphite powder are 5-9 μm. The fixing glue can be heated by an electromagnetic heating device and can withstand electromagnetic induction heating at a higher temperature.

[0018] Furthermore, the auxiliary curing equipment includes an electromagnet, an oscillating circuit is connected to the electromagnet to generate a magnetic field with periodic direction changes, the electromagnet is close to the fixing glue, the ferroferric oxide powder on the glass fiber can vibrate in the alternating magnetic field to expel the air in the fixing glue, and the vibration also promotes the tightness of the glass fiber and the fixing glue, so that the fixing glue mixed with the graphene oxide-europium oxide composite forms a conductive fluid, and at the same time, the electrons inside the graphite in the cured fixing glue are not as active as in the liquid state, so it loses its conductivity and shows a higher resistivity. The conductive path in the graphite of the cured fixing glue is also closed due to the lack of sufficient electron concentration and fluidity.

[0019] Furthermore, the auxiliary curing equipment also includes an electromagnetic heating device, which generates an alternating magnetic field, and the fixing glue is heated and cured by the electromagnetic heating device.

[0020] The electromagnetic heating device generates an alternating magnetic field. The glass fiber is bonded with soft magnetic powder, which has soft magnetic properties and can introduce the magnetic field deep into the fluid glue to form a relatively uniform magnetic field distribution in the fluid glue. The magnetic field generated by the electromagnetic heater is used to make the conductive fluid generate eddy current and heat, thereby heating the conductive fluid glue relatively evenly.

[0021] Preferably, the first component contains, by weight percentage, 19%-31% polydimethylsiloxane, 19%-31% methyltriethoxysilane, 8%-9.5% white carbon black, 5%-6% tetraethoxysilane, and 1%-2% graphene oxide-europium oxide composite.

[0022] Furthermore, in the second component, by weight percentage, the catalyst comprises 1%-2%, the promoter comprises 8%-9%, and the viscosity enhancer comprises 6%-7%; the catalyst comprises dibutyltin dilaurate; the promoter comprises γ-aminopropyltriethoxysilane; and the viscosity enhancer comprises N-β-aminoethyl-γ-aminopropyltrimethoxysilane.

[0023] The rate of the condensation reaction can be adjusted by the second component, making the production process more flexible. The catalyst uses dibutyltin dilaurate and the promoter uses γ-aminopropyltriethoxysilane, which are substances that can accelerate the rate of chemical reactions without being consumed in the reaction themselves. The tackifier uses N-β-aminoethyl-γ-aminopropyltrimethoxysilane to help fix the glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is a schematic diagram of the structural principle of the protection tube of the present invention; Figure 2 A microscopic diagram of a glass fiber mesh of shortened and expanded glass fibers of the present invention; Figure 3 It is a schematic diagram of the structural principle of the glass fiber mesh of the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1, reference Figure 1-Figure 3, the structure enhancement and damage repair process of the power cable insulation protection tube, first prepare the protection tube 1 and the fixing glue.

[0030] The fixing glue comprises two components, a first component and a second component; The first component includes polydimethylsiloxane, methyltriethoxysilane, white carbon black and tetraethoxysilane; The second component includes a catalyst, an accelerator, and a tackifier; adding a graphene oxide-europium oxide composite to the first component; The first component is also doped with a glass fiber mesh 4 in a fragmented form, and the glass fiber mesh 4 in a fragmented form is used as a filler; The glass fiber mesh 4 includes a mesh body 41 and extended glass fibers 42. The mesh body 41 is woven with warp and weft threads, and both the warp and weft threads are made of glass fibers. The lengths of at least part of the warp threads and at least part of the weft threads are both beyond the mesh body 41, forming extended glass fibers 42; A pair of auxiliary curing devices for accelerating the curing of the fixing glue are also prepared, and the auxiliary curing devices include an electromagnetic transmitter; The following steps are involved: Step 1, weaving and winding the heteroaramid fiber on the outer wall of the protection tube 1 to form a heteroaramid braided layer 2, and weaving and winding the carbon fiber on the heteroaramid braided layer 2 to form a carbon fiber braided layer 3; Step 2, after the carbon fiber braided layer 3 is wound, the protective tube 1 wound with the anisoaramid braided layer 2 and the carbon fiber braided layer 3 is placed in a curing furnace for heating and curing. After the anisoaramid braided layer 2 and the carbon fiber braided layer 3 are cured, the protective tube 1 wound with the anisoaramid braided layer 2 and the carbon fiber braided layer 3 is polished and cleaned; Step 3, coating the first component on the carbon fiber braided layer 3, the first component is coated on the carbon fiber braided layer 3, and the second component is sprayed on the first component coating; Step 4, curing the fixing glue, irradiating the area where the fixing glue is coated with an electromagnetic transmitter to excite the graphene oxide-europium oxide complex to fluoresce, and the fluorescence causes the fixing glue containing tetraethoxysilane to be photocured to form a strong network structure, and the first component and the second component of the fixing glue undergo a condensation reaction to form a strong chemical bond on the surface of the first component, so that the surface of the fixing glue has excellent structural strength, and the fixing glue is cured to form a composite material structure; Control the curing temperature to 25-45°C, at 0.1-0.2MPa, the curing time is 20-30 hours; Step 5: When the protective tube 1 prepared in step 4 is used to protect the power cable, the fixing glue added with the graphene oxide-europium oxide composite has a fluorescent property, and a fluorescent layer is formed on the surface of the protective tube 1. When the protective tube 1 is damaged, the fluorescent layer is damaged and dark spots appear, and the damaged position is located by the dark spots; Step 6: Re-apply the first component of the fixing glue on the dark spots of the fluorescent layer in step 5, and spray the second component on the first component coating. The re-applied fixing glue is cured under natural sunlight, temperature and air pressure.

[0031] In the above design, the protective tube 1 in step 1 has a structural layer of anisoaramid braided layer 2 and a carbon fiber braided layer 3. Aramid is a high-performance fiber with extremely high strength and heat resistance, while carbon fiber is known for its excellent mechanical properties and light weight. The protective tube 1 has a structural layer of anisoaramid braided layer 2 and a carbon fiber braided layer 3. The protective tube 1 not only has excellent mechanical properties, but also has good insulation and corrosion resistance. The anisoaramid braided layer 2 and the carbon fiber braided layer 3 can also effectively block sunlight and extend the service life of the protective tube 1 made of CPVC or PVC material. Due to the high strength and impact resistance of the protective tube 1 of the anisoaramid braided layer 2 and the carbon fiber braided layer 3, the protective tube 1 is not easily damaged during transportation and installation, reducing losses during construction. While ensuring that the number of fiber meshes is moderate, ensure that the expanded glass fibers 42 are interlaced with each other as much as possible to form a three-dimensional mesh structure to improve the overall strength.

[0032] In step 3 and step 4, a layer of fixing glue is coated on the surface of the carbon fiber braided layer 3 , and the fixing glue can not only bond the carbon fiber braided layer 3 , the anisotropic aramid braided layer 2 and the outer surface of the protective tube 1 together.

[0033] Graphene oxide-europium oxide complex is added to the first component. Tetraethoxysilane is a cross-linking agent or bridging agent, which makes the fixed glue have a light-curing effect. When the first component is excited by the electromagnetic radiation generated by the electromagnetic emitter, europium oxide is cross-linked under the fluorescence irradiation to form a strong network structure. The graphene oxide-europium oxide complex can also improve the mechanical strength and toughness of the fixed glue, making it more durable.

[0034] Through condensation reaction (condensation reaction is a reaction in which two or more organic molecules interact with each other and are combined into a large molecule by covalent bonds, and is often accompanied by the loss of small molecules such as water, hydrogen chloride, alcohol, etc.), a strong chemical bond can be formed, so that the fixing glue has excellent adhesion and structural strength when connecting materials. Tetraethoxysilane is a cross-linking agent, also known as a bridging agent, which can form silicone polymers through hydrolysis and condensation reactions. These polymers can be cross-linked under electromagnetic radiation to form a strong network structure, making the fixing glue have a light-curing effect. White carbon black has a good thickening effect and can increase the viscosity of the fixing glue. Adding white carbon black can enhance the mechanical strength of the fixing glue and improve the firmness of the bond. Especially when the fixing glue is cured, white carbon black can provide additional support as a filling material.

[0035] The chemical reaction formula of the condensation reaction is: (CH3)3Si-O-Si(CH3)3 + H2O → (CH3)3Si-OH + (CH3)3SiOH; (CH3)3Si-OH + CH3Si(OCH2CH3)3 → (CH3)3Si-O-Si(CH3)(OCH2CH3)3.

[0036] The first component coating surface undergoes a condensation reaction with the second component to form a coating layer. This fixing glue that combines light curing and chemical condensation has a supporting network structure inside, and the fixing glue surface has excellent structural strength, wear resistance and good integrity, which can improve the structural strength and durability of the cured fixing glue, thereby further improving the protection strength of the protection tube 1.

[0037] Control the curing temperature to 25-45°C, the curing time to 20-30 hours at 0.1-0.2MPa, to ensure that the fixing glue is completely cured and the cured structure is uniform and stable, and to improve the stability of the structure formed by the fixing glue; Step 5 and step 6: If the protective tube 1 is damaged during use, the fluorescent layer generated by the graphene oxide-europium oxide composite absorbing sunlight can quickly find the damaged position through the dark spots on the fluorescent layer, and the re-applied fixing glue is cured under natural sunlight, temperature and air pressure. The coating repair can be simple and fast.

[0038] The glass fiber mesh 4 retains the expanded glass fibers 42. The beneficial effect of the expanded glass fibers 42 is that, while ensuring a moderate amount of the fiber mesh, the expanded glass fibers 42 are staggered as much as possible to form a three-dimensional mesh structure, thereby improving the overall strength and the structural strength of the protective tube 1 when repairing damaged parts with fixing glue.

[0039] Furthermore, the diameter of the glass fibers of the glass fiber mesh 4 is 5.5-9.5 μm; the area of ​​the mesh body 41 is 0.45-1.95 mm 2 , mesh area is 0.01-0.18mm 2 The length of the extended glass fiber 42 is 0.45-2.05 mm. In terms of volume, there are 3-6 glass fiber meshes 4 per cubic centimeter. The 6-9 μm glass fiber mesh has good softness and a certain toughness. The area of ​​the mesh body 41 is 0.5-2 mm 2 The formed fragmented glass fiber mesh 4 is not easy to be tangled into a ball after being mixed into the polymer moisture-proof plugging glue as a filler. The mesh area is 0.01-0.19mm 2 , allowing polydimethylsiloxane to pass through the mesh and to bond more strongly to the glass fiber mesh 4; the length of the extended glass fiber 42 is 0.45-2.05 mm, and there are 3-6 glass fiber meshes 4 per cubic centimeter, ensuring that the extended glass fibers 42 are interlaced as much as possible to form a three-dimensional network structure, thereby improving the structural strength of the fixing glue after curing.

[0040] The first component contains, by weight percentage, 19%-31% polydimethylsiloxane, 19%-31% methyltriethoxysilane, 8%-9.5% white carbon black, 5%-6% tetraethoxysilane, and 1%-2% graphene oxide-europium oxide complex.

[0041] The second component comprises, by weight percentage, 1%-2% of a catalyst, 8%-9% of an accelerator, and 6%-7% of a tackifier; the catalyst comprises dibutyltin dilaurate; the accelerator comprises γ-aminopropyltriethoxysilane; and the tackifier comprises N-β-aminoethyl-γ-aminopropyltrimethoxysilane.

[0042] The rate of the condensation reaction can be adjusted by the second component, making the production process more flexible. The catalyst uses dibutyltin dilaurate and the promoter uses γ-aminopropyltriethoxysilane, which are substances that can accelerate the rate of chemical reactions without being consumed in the reaction themselves. The tackifier uses N-β-aminoethyl-γ-aminopropyltrimethoxysilane to help fix the glue.

[0043] When the protective tube 1 is produced, the heteroaramid fiber is woven and wound on the outer wall of the protective tube 1 to form a heteroaramid woven layer 2, and the carbon fiber is woven and wound on the heteroaramid woven layer 2 to form a carbon fiber woven layer 3. Then, the protective tube 1 wrapped with the heteroaramid woven layer 2 and the carbon fiber woven layer 3 is placed in a curing furnace for heating and curing. After curing, it is polished and cleaned, and the first component is coated on the surface of the carbon fiber woven layer 3. The second component is evenly sprayed on the first component. The electromagnetic transmitter is used to irradiate the area where the fixing glue is coated to excite the graphene oxide-europium oxide complex to fluoresce. The fluorescence causes the fixing glue containing tetraethoxysilane to be photocured, and a strong chemical bond can be formed on the surface of the first component, so that the surface of the fixing glue has excellent structural strength, so that the fixing glue is cured to form a composite material structure, thereby enhancing the structure of the protective tube 1.

[0044] When in use, the fixing glue of the graphene oxide-europium oxide composite is excited to fluoresce by sunlight. When the protective tube 1 is damaged, dark spots appear where the fluorescent layer is damaged, which facilitates the positioning of the damaged position. The first component of the fixing glue is re-coated on the dark spots of the fluorescent layer, and the second component is sprayed on the coating of the first component. The re-coated fixing glue is cured under natural sunlight, temperature and air pressure, making the damage of the protective tube 1 convenient and quick to repair.

[0045] Example 2, reference Figure 2 and Figure 3 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0046] When drawing the glass fiber as one of the warp and weft, the ferroferric oxide powder is bonded to the glass fiber in a molten state through a space where ferroferric oxide powder dust is floating in the air, and the particle size of the ferroferric oxide powder is 0.45-0.25μm; when drawing the glass fiber as the other of the warp and weft, the graphite powder is bonded to the glass fiber in a molten state through a space where ferroferric oxide powder dust is floating in the air, and the particle size of the graphite powder is 5-9μm. The fixing glue can be heated by electromagnetic heating equipment and can withstand electromagnetic induction heating at a higher temperature.

[0047] The auxiliary curing equipment includes an electromagnet, an oscillating circuit is connected to the electromagnet to generate a magnetic field with periodic direction changes. The electromagnet is close to the fixing glue, and the ferroferric oxide powder on the glass fiber can vibrate in the alternating magnetic field to expel the air in the fixing glue. The vibration also promotes the tightness of the glass fiber and the fixing glue, so that the fixing glue mixed with the graphene oxide-europium oxide composite forms a conductive fluid. At the same time, the electrons inside the graphite in the cured fixing glue are not as active as in the liquid state, so it loses its conductivity and exhibits a higher resistivity. The conductive pathways in the graphite of the cured fixing glue are also closed due to the lack of sufficient electron concentration and fluidity.

[0048] Furthermore, the auxiliary curing equipment also includes an electromagnetic heating device, which generates an alternating magnetic field, and the fixing glue is heated and cured by the electromagnetic heating device.

[0049] The electromagnetic heating device generates an alternating magnetic field. The glass fiber is bonded with soft magnetic powder, which has soft magnetic properties and can introduce the magnetic field deep into the fluid glue to form a relatively uniform magnetic field distribution in the fluid glue. The magnetic field generated by the electromagnetic heater is used to make the conductive fluid generate eddy current and heat, thereby heating the conductive fluid glue relatively evenly.

[0050] When the fixing glue is solidified, an oscillating circuit is first connected to the electromagnet to generate a magnetic field with periodic direction changes. The electromagnet is close to the fixing glue, and the ferroferric oxide powder on the glass fiber can vibrate in the alternating magnetic field to expel the air in the fixing glue. The vibration also promotes the tightness of the glass fiber and the fixing glue, so that the fixing glue mixed with the graphene oxide-europium oxide composite forms a conductive fluid, and then an electromagnetic heating device is used to generate an alternating magnetic field to generate eddy current heat in the conductive fluid, thereby heating the conductive fluid glue relatively evenly, making the structure of the cured fixing glue uniform and stable, and further improving the structural strength of the protective tube 1.

[0051] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible, for example, the size, scale, structure, shape and proportion of various elements, and parameter values ​​such as temperature, pressure, etc., mounting arrangements, use of materials, color, directional changes, etc., without substantially departing from the novel angles and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0052] Furthermore, in order to provide a concise description of exemplary embodiments, all features of the actual embodiment may not be described, namely those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention.

[0053] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. The process of strengthening the structure of the power cable insulation protection tube and repairing the damage thereof includes first preparing the protection tube and fixing glue, which is characterized by: The fixing glue comprises two components, a first component and a second component; The first component includes polydimethylsiloxane, methyltriethoxysilane, white carbon black and tetraethoxysilane; The second component includes a catalyst, an accelerator, and a tackifier; adding a graphene oxide-europium oxide composite to the first component; The first component is also doped with glass fiber mesh in a fragmented form, and the glass fiber mesh in a fragmented form is used as a filler; The glass fiber mesh comprises a mesh body and expanded glass fibers, the mesh body is woven with warp and weft, and both the warp and weft are made of glass fibers; The lengths of at least part of the warp threads and at least part of the weft threads are beyond the mesh body to form expanded glass fibers; A pair of auxiliary curing devices for accelerating the curing of the fixing glue are also prepared, and the auxiliary curing devices include an electromagnetic transmitter; The following steps are involved: Step 1, weaving and winding the heteroaramid fiber on the outer wall of the protection tube to form a heteroaramid braided layer, and weaving and winding the carbon fiber on the heteroaramid braided layer to form a carbon fiber braided layer; Step 2, after the carbon fiber braided layer is wound, the protective tube wound with the anisotropic aramid braided layer and the carbon fiber braided layer is placed in a curing furnace for heating and curing. After the curing of the anisotropic aramid braided layer and the carbon fiber braided layer is completed, the protective tube wound with the anisotropic aramid braided layer and the carbon fiber braided layer is polished and cleaned; Step 3, coating the first component on the carbon fiber braided layer, the first component is coated on the carbon fiber braided layer, and the second component is sprayed on the first component coating; Step 4, curing the fixing glue, irradiating the area where the fixing glue is coated with an electromagnetic transmitter to excite the graphene oxide-europium oxide complex to fluoresce, and the fluorescence causes the fixing glue containing tetraethoxysilane to be photocured to form a strong network structure, and the first component and the second component of the fixing glue undergo a condensation reaction to form a strong chemical bond on the surface of the first component, so that the surface of the fixing glue has excellent structural strength, and the fixing glue is cured to form a composite material structure; Control the curing temperature to 25-45°C, at 0.1-0.2MPa, the curing time is 20-30 hours; Step 5: When the protective tube prepared in step 4 is used to protect the power cable, the fixing glue added with the graphene oxide-europium oxide composite has a fluorescent property, and a fluorescent layer is formed on the surface of the protective tube. When the protective tube is damaged, the fluorescent layer is damaged to form dark spots, and the damaged position is located by the dark spots; Step 6: Re-apply the first component of the fixing glue on the dark spots of the fluorescent layer in step 5, and spray the second component on the first component coating. The re-applied fixing glue is cured under natural sunlight, temperature and air pressure.

2. The process for strengthening the structure and repairing damage of the power cable insulation protection tube according to claim 1 is characterized in that: The diameter of the glass fibers of the glass fiber mesh is 5.5-9.5 μm; The area of ​​the mesh is 0.45-1.95mm 2 , mesh area is 0.01-0.18mm 2 ; The length of the expanded glass fiber is 0.45-2.05mm; In terms of volume, there are 3-6 glass fiber meshes per cubic centimeter.

3. The process for strengthening the structure and repairing damage of the power cable insulation protection tube according to claim 1 is characterized in that: When drawing the glass fiber as one of the warp and weft, the molten state is passed through a space where ferroferric oxide powder dust is floating in the air, and the ferroferric oxide powder is bonded. The particle size of the ferroferric oxide powder is 0.45-0.25μm. As another kind of glass fiber in the warp and weft, when drawing, the molten state is passed through the space where graphite powder dust is floating in the air, and the graphite powder is bonded. The particles of the graphite powder are 5-9μm.

4. The process for strengthening the structure and repairing damage of the power cable insulation protection tube according to claim 3 is characterized in that: The auxiliary curing equipment includes an electromagnet, an oscillating circuit is connected to the electromagnet to generate a magnetic field with periodic direction changes. The electromagnet is close to the fixing glue, and the ferroferric oxide powder on the glass fiber can vibrate in the alternating magnetic field to expel the air in the fixing glue. The vibration also promotes the tightness of the glass fiber and the fixing glue.

5. The process for strengthening the structure and repairing damage of the power cable insulation protection tube according to claim 3 is characterized in that: The auxiliary curing equipment also includes an electromagnetic heating device, which generates an alternating magnetic field, and the fixing glue is heated and cured by the electromagnetic heating device.

6. The process for strengthening the structure and repairing damage of the power cable insulation protection tube according to claim 1, characterized in that: The first component contains, by weight percentage, 19%-31% polydimethylsiloxane, 19%-31% methyltriethoxysilane, 8%-9.5% white carbon black, 5%-6% tetraethoxysilane, and 1%-2% graphene oxide-europium oxide complex.

7. The process for strengthening the structure and repairing damage of the power cable insulation protection tube according to claim 1, characterized in that: The second component, by weight percentage, includes 1%-2% catalyst, 8%-9% accelerator, and 6%-7% tackifier; Catalysts include dibutyltin dilaurate; Accelerators include gamma-aminopropyltriethoxysilane; Adhesion promoters include N-β-aminoethyl-γ-aminopropyltrimethoxysilane.

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