Power Cable Insulation Protection Pipe Structure Enhancement and Damage Repair Process

Abstract

The present invention relates to the technical field of power cables, and particularly to the structure enhancement and damage repair process of power cable insulation protection tubes. First, a protection tube and a fixing glue are prepared; the method includes the following steps: Step 1: Weave and wind anisotropic aramid fibers around the outer wall of the protection tube, and weave and wind carbon fibers around the anisotropic aramid woven layer; Step 2: Place the protection tube wound with the anisotropic aramid woven layer and the carbon fiber woven layer into a curing furnace for heating and curing; Step 3: Coat the first component on the carbon fiber woven layer. The first component is coated on the carbon fiber woven layer, and the second component is sprayed on the first component coating; Step 4: Cure the fixing glue; Step 5: When the protection tube is damaged, the fluorescent layer is damaged and dark spots appear, which is convenient for positioning the damaged position; Step 6: Re-coat the fixing glue at the dark spots of the fluorescent layer in Step 5, and the re-coated fixing glue cures under natural sunlight, temperature and air pressure.

Description

Technical Field

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

[0002] The traditional materials of the protection tube are generally CPVC and PVC. Under harsh environments such as long-term ultraviolet irradiation, temperature changes, and chemical corrosion, this kind of protection tube is prone to aging and embrittlement phenomena, resulting in a decrease in mechanical strength, thereby increasing the maintenance cost and safety risks. In densely populated areas such as residential areas, the damage of power conduits and protection tubes not only affects the daily life of residents, but may also cause electric shock accidents, resulting in casualties and property losses. In addition, the PVC material has poor impact resistance. Once it is impacted by external force, it is easy to break, and it takes a lot of time to find the broken position during repair.

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

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. In this part, as well as in the abstract and title of the present application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract, 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 problems existing in the above-mentioned prior art, the present invention is proposed.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A process for enhancing the structure and repairing the damage of a power cable insulating protection tube, first prepare a protection tube and a fixing glue.

[0008] The fixing glue includes two components: a first component and a second component;

[0009] The first component includes polydimethylsiloxane, methyltriethoxysilane, fumed silica, and tetraethoxysilane;

[0010] The second component includes a catalyst, an accelerator, and a tackifier;

[0011] Add a graphene oxide-europium oxide composite to the first component;

[0012] The first component is also doped with a fragmented glass fiber mesh, and the fragmented glass fiber mesh is used as a filler;

[0013] The fiberglass mesh includes a mesh body and extended fiberglass. The mesh body is woven from warp and weft threads, both of which are made of fiberglass;

[0014] The lengths of at least some of the warp threads and at least some of the weft threads exceed the mesh body portion, forming extended fiberglass;

[0015] There is also a pair of auxiliary curing devices for accelerating the curing of the fixing glue. The auxiliary curing devices include electromagnetic emitters;

[0016] It includes the following steps:

[0017] Step 1: Weave and wind anisotropic aramid fibers around the outer wall of the protective tube to form an anisotropic aramid woven layer, and then weave and wind carbon fibers around the anisotropic aramid woven layer to form a carbon fiber woven layer;

[0018] Step 2: After the winding of the carbon fiber woven layer is completed, place the protective tube wound with the anisotropic aramid woven layer and the carbon fiber woven layer into a curing furnace for heating and curing. After the anisotropic aramid woven layer and the carbon fiber woven layer are cured, grind and clean the protective tube wound with the anisotropic aramid woven layer and the carbon fiber woven layer;

[0019] Step 3: Coat the first component on the carbon fiber woven layer. The first component is coated on the carbon fiber woven layer, and the second component is sprayed on the first component coating;

[0020] Step 4: Cure the fixing glue. The electromagnetic emitter irradiates the place where the fixing glue is coated to excite the fluorescence of the graphene oxide - europium oxide complex. The fluorescence causes the fixing glue containing tetraethoxysilane to be photocured, forming a strong network structure. The first component and the second component of the fixing glue undergo a condensation reaction to form strong chemical bonds on the surface of the first component, making the surface of the fixing glue have excellent structural strength. Thus, the fixing glue cures to form a composite material structure;

[0021] Control the curing temperature to be 25 - 45 °C, under 0.1 - 0.2 MPa, and the curing time is 20 - 30 hours;

[0022] Step 5: When the protective tube prepared in Step 4 is applied to protect the power cable, the fixing glue added with the graphene oxide - europium oxide complex has fluorescence characteristics, forming a fluorescent layer on the surface of the protective tube. When the protective tube is damaged, the fluorescent layer is damaged and dark spots appear. The damaged position is located through the dark spots;

[0023] Step 6: Re - coat the first component of the fixing glue at the dark spots of the fluorescent layer in Step 5, and spray the second component on the first component coating. The re - coated fixing glue cures under natural sunlight, temperature, and air pressure.

[0024] In the above design, in Step 1, the protective tube has a structural layer composed of a profiled aramid woven layer and a carbon fiber woven layer. 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 with the profiled aramid woven layer and the carbon fiber woven layer not only has excellent mechanical properties, but also has good insulation and corrosion resistance. The profiled aramid woven layer and the carbon fiber woven layer 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 with the profiled aramid woven layer and the carbon fiber woven layer, the protective tube is not easily damaged during transportation and installation, reducing the loss during the construction process. When the number of fiber meshes is moderate, ensure that the extended glass fibers are staggered as much as possible with each other to form a three-dimensional network structure and improve the overall strength.

[0025] In Step 3 and Step 4, a layer of fixing glue is coated on the surface of the carbon fiber woven layer. The fixing glue can not only bond the carbon fiber woven layer, the profiled aramid woven layer and the outer surface of the protective tube into one body.

[0026] Add graphene oxide-europium oxide composite to the first component. Tetraethoxysilane is a cross-linking agent, also known as a bridging agent, which makes the fixing glue have a photocuring effect. When the first component is irradiated by the electromagnetic rays generated by the electromagnetic emitter to excite the fluorescence of europium oxide, it cross-links under the fluorescence irradiation to form a strong network structure. The graphene oxide-europium oxide composite can also improve the mechanical strength and toughness of the fixing glue, making it more durable.

[0027] Through a condensation reaction (a condensation reaction is a reaction in which two or more organic molecules interact and are covalently bonded into a large molecule, often accompanied by the loss of small molecules such as water, hydrogen chloride, alcohol, etc.), strong chemical bonds can be formed, enabling the fixing glue to have excellent adhesion and structural strength when connecting materials. Tetraethoxysilane is a cross-linking agent, also known as a bridging agent, which can form silicon-oxygen polymers through hydrolysis and condensation reactions. These polymers can cross-link under electromagnetic ray irradiation to form a strong network structure, making the fixing glue have a photocuring effect. Fumed silica has a good thickening effect and can increase the viscosity of the fixing glue. Adding fumed silica can enhance the mechanical strength of the fixing glue and improve the firmness of the bonding. Especially when the fixing glue is cured, fumed silica, as a filler material, can provide additional support.

[0028] Chemical reaction formula of the condensation reaction:

[0029] (CH3)3Si-O-Si(CH3)3 + H2O → (CH3)3Si-OH + (CH3)3SiOH;

[0030] (CH3)3Si-OH + CH3Si(OCH2CH3)3 → (CH3)3Si-O-Si(CH3)(OCH2CH3)3。

[0031] The surface of the first component coating undergoes a condensation reaction with the second component to form a coating layer. This fixing adhesive that combines photocuring and chemical condensation has a supporting network structure inside. The surface of the fixing adhesive has excellent structural strength, wear resistance, and good integrity, which can improve the structural strength and durability of the cured fixing adhesive. Thus, it further enhances the protection strength of the protection tube.

[0032] Control the curing temperature at 25 - 45 °C. Under a pressure of 0.1 - 0.2 MPa, the curing time is 20 - 30 hours to ensure that the fixing adhesive is completely cured and the cured structure is uniform and stable, improving the stability of the structure formed by the curing of the fixing adhesive.

[0033] In steps 5 and 6, during the use of the protection tube, if damage occurs, the fluorescent layer generated by the absorption of sunlight by the graphene oxide - europium oxide composite can quickly locate the damaged position through the dark spots on the fluorescent layer. Moreover, for the re - coated fixing adhesive, the re - coated fixing adhesive cures under natural sunlight, temperature, and air pressure. It can be coated and repaired simply and quickly.

[0034] The fiberglass mesh retains expanded fiberglass. The beneficial effect of the expanded fiberglass is that, while ensuring an appropriate number of fiber meshes, it ensures that the expanded fiberglass intersects as much as possible with each other, forming a three - dimensional reticular structure, which improves the overall strength and the structural strength of the protection tube repaired with the fixing adhesive at the damaged part.

[0035] Furthermore, the diameter of the fiberglass in the fiberglass mesh is 5.5 - 9.5 μm; the area of the mesh body is 0.45 - 1.95 mm 2 , and the area of the mesh holes is 0.01 - 0.18 mm 2 ; the length of the expanded fiberglass is 0.45 - 2.05 mm; calculated by the number of sheets per unit volume, there are 3 - 6 fiberglass meshes per cubic centimeter; moreover, the mesh woven with 6 - 9 μm fiberglass has good softness and certain toughness. The area of the mesh body is 0.5 - 2 mm 2 , and the fragmented fiberglass mesh formed is not easily knotted into a group after being doped into the polymer moisture - proof sealing potting glue as a filler. The area of the mesh holes is 0.01 - 0.19 mm 2 , allowing polydimethylsiloxane to pass through the mesh holes and having a stronger bonding force with the fiberglass mesh; the length of the expanded fiberglass is 0.45 - 2.05 mm, and there are 3 - 6 fiberglass meshes per cubic centimeter, ensuring that the expanded fiberglass intersects as much as possible with each other, forming a three - dimensional reticular structure and improving the structural strength after the curing of the fixing adhesive.

[0036] Preferably, when one of the warp and weft is glass fiber, during wire drawing, using the molten state, it passes through the space where iron tetroxide powder dust floats in the air to adhere to iron tetroxide powder, and the particle size of the iron tetroxide powder is 0.45 - 0.25 μm; when the other of the warp and weft is glass fiber, during wire drawing, using the molten state, it passes through the space where iron tetroxide powder dust floats 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 relatively high temperature.

[0037] Furthermore, the auxiliary curing device includes an electromagnet, and an oscillating circuit is connected to the electromagnet to generate a magnetic field with a periodically changing direction. The electromagnet is close to the fixing glue. The iron tetroxide powder on the glass fiber can generate vibrations in the alternating magnetic field to expel the air in the fixing glue. At the same time of vibration, it also promotes the tightness of the fit between the glass fiber and the fixing glue, making the fixing glue mixed with graphene oxide - europium oxide complex form a conductive fluid. At the same time, the electrons inside the graphite in the cured fixing glue are less active than in the liquid state, so it loses its conductive ability and shows a relatively high resistivity. The conductive path in the graphite of the cured fixing glue is also blocked due to the lack of sufficient electron concentration and fluidity.

[0038] Furthermore, the auxiliary curing device also includes an electromagnetic heating device. The electromagnetic heating device generates an alternating magnetic field, and the fixing glue is heated and cured by the electromagnetic heating device.

[0039] The electromagnetic heating device generates an alternating magnetic field. The glass fiber is adhered with soft magnetic powder, and the soft magnetic powder has soft magnetic properties, which 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 heating, thereby heating the fluid glue with conductive properties relatively uniformly.

[0040] Preferably, in the first component, by weight percentage, polydimethylsiloxane is 19% - 31%, methyltriethoxysilane is 19% - 31%, fumed silica is 8% - 9.5%, and tetraethoxysilane is 5% - 6%, and graphene oxide - europium oxide complex is 1% - 2%.

[0041] Furthermore, in the second component, by weight percentage, the catalyst is 1% - 2%, the promoter is 8% - 9%, and the tackifier is 6% - 7%; the catalyst includes dibutyltin dilaurate; the promoter includes γ - aminopropyltriethoxysilane; the tackifier includes 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 is dibutyltin dilaurate and the promoter is γ-aminopropyltriethoxysilane, which can accelerate the chemical reaction rate and is not consumed in the reaction itself. The tackifier is N-β-aminoethyl-γ-aminopropyltrimethoxysilane, which can help fix the shape of the glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0044] Figure 1 is a schematic structural principle diagram of the protection tube of the present invention;

[0045] Figure 2 is a microscopic display diagram of the glass fiber mesh of the shortened and expanded glass fiber of the present invention;

[0046] Figure 3 is a schematic structural principle diagram of the glass fiber mesh of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] In order to make the above objects, features, and advantages of the present invention more understandable, the following will make a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings of the specification.

[0048] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0049] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for the convenience of description, the cross-sectional views showing the device structure will be enlarged locally out of the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0050] Furthermore, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that can be included in less than one implementation manner of the present invention. The "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 selectively exclusive embodiment from other embodiments.

[0051] Example 1, refer toFigures 1-3 , the structure enhancement and damage repair technology of the power cable insulation protection pipe, first prepare the protection pipe 1 and the fixing glue.

[0052] The fixing glue includes two components: the first component and the second component;

[0053] The first component includes polydimethylsiloxane, methyltriethoxysilane, fumed silica and tetraethoxysilane;

[0054] The second component includes a catalyst, an accelerator and a tackifier;

[0055] Add graphene oxide-europium oxide composite to the first component;

[0056] The first component is also doped with a fragmented glass fiber mesh 4, and the fragmented glass fiber mesh 4 is used as a filler;

[0057] The glass fiber mesh 4 includes a mesh body 41 and extended glass fibers 42. The mesh body 41 is woven from warp and weft threads, and both the warp and weft threads are made of glass fibers;

[0058] The lengths of at least some of the warp threads and at least some of the weft threads both exceed the part of the mesh body 41, forming extended glass fibers 42;

[0059] Also prepare a pair of auxiliary curing devices for accelerating the curing of the fixing glue. The auxiliary curing devices include electromagnetic emitters;

[0060] It includes the following steps:

[0061] Step 1: Weave and wind the anisotropic aramid fiber around the outer wall of the protection pipe 1 to form an anisotropic aramid woven layer 2, and weave and wind the carbon fiber around the anisotropic aramid woven layer 2 to form a carbon fiber woven layer 3;

[0062] Step 2: After the winding of the carbon fiber woven layer 3 is completed, put the protection pipe 1 wound with the anisotropic aramid woven layer 2 and the carbon fiber woven layer 3 into a curing furnace for heating and curing. After the anisotropic aramid woven layer 2 and the carbon fiber woven layer 3 are cured, polish and clean the protection pipe 1 wound with the anisotropic aramid woven layer 2 and the carbon fiber woven layer 3;

[0063] Step 3: Coat the first component on the carbon fiber woven layer 3. The first component is coated on the carbon fiber woven layer 3, and the second component is sprayed on the first component coating;

[0064] Step 4: Cure the fixing glue. Irradiate the area coated with the fixing glue through an electromagnetic emitter to excite the fluorescence of the graphene oxide-europium oxide composite. The fluorescence causes the fixing glue containing tetraethoxysilane to be photocured, forming a strong network structure. The first component and the second component of the fixing glue undergo a condensation reaction, forming strong chemical bonds on the surface of the first component, so that the surface of the fixing glue has excellent structural strength, and thus the fixing glue cures to form a composite material structure;

[0065] Control the curing temperature at 25 - 45 °C, under 0.1 - 0.2 MPa, and the curing time is 20 - 30 hours;

[0066] Step 5: When applying the protective tube 1 prepared in Step 4 to protect the power cable, the fixing glue added with the graphene oxide-europium oxide composite has fluorescence characteristics, forming a fluorescent layer on the surface of the protective tube 1. When the protective tube 1 is damaged, the fluorescent layer is damaged and dark spots appear. Locate the damaged position through the dark spots;

[0067] Step 6: Re-coat the first component of the fixing glue at the dark spots of the fluorescent layer in Step 5, and spray the second component on the first component coating. The re-coated fixing glue cures under natural sunlight, temperature, and air pressure.

[0068] In the above design, the protective tube 1 in Step 1 has a structural layer of a special-shaped aramid woven layer 2 and a carbon fiber woven layer 3. Aramid is a high-performance fiber with extremely high strength and heat resistance, while carbon fiber is famous for its excellent mechanical properties and light weight. The protective tube 1 has a structural layer of a special-shaped aramid woven layer 2 and a carbon fiber woven layer 3, not only having excellent mechanical properties, but also good insulation and corrosion resistance. The special-shaped aramid woven layer 2 and the carbon fiber woven 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 with the special-shaped aramid woven layer 2 and the carbon fiber woven layer 3, the protective tube 1 is not easily damaged during transportation and installation, reducing the loss during the construction process. When ensuring an appropriate number of fiber meshes, ensure that the extended glass fibers 42 intersect as much as possible with each other to form a three-dimensional network structure and improve the overall strength.

[0069] Step 3: A layer of fixing glue is coated on the surface of the carbon fiber woven layer 3 in Step 4. The fixing glue can not only bond the carbon fiber woven layer 3, the special-shaped aramid woven layer 2 and the outer surface of the protective tube 1 into one body.

[0070] Graphene oxide-europium oxide composite is added to the first component. Tetraethoxysilane is a crosslinking agent, also known as a bridging agent, which enables the fixing glue to have a photocuring effect. When the europium oxide in the first component is excited by the electromagnetic rays generated by the electromagnetic emitter to emit fluorescence, crosslinking occurs under the fluorescence irradiation, forming a strong network structure. The graphene oxide-europium oxide composite can also improve the mechanical strength and toughness of the fixing glue, making it more durable.

[0071] Strong chemical bonds can be formed through a condensation reaction (a condensation reaction is a reaction in which two or more organic molecules interact and are covalently bonded into a large molecule, often accompanied by the loss of small molecules such as water, hydrogen chloride, alcohol, etc.), enabling the fixing glue to have excellent adhesion and structural strength when connecting materials. Tetraethoxysilane is a crosslinking agent, also known as a bridging agent, which can form siloxane polymers through hydrolysis and condensation reactions. These polymers can crosslink under electromagnetic ray irradiation to form a strong network structure, giving the fixing glue a photocuring effect. Fumed silica has a good thickening effect and can increase the viscosity of the fixing glue. Adding fumed silica can enhance the mechanical strength of the fixing glue and improve the firmness of the bond. Especially when the fixing glue is cured, fumed silica, as a filler material, can provide additional support.

[0072] Chemical reaction formula of the condensation reaction:

[0073] (CH3)3Si-O-Si(CH3)3 + H2O → (CH3)3Si-OH + (CH3)3SiOH;

[0074] (CH3)3Si-OH + CH3Si(OCH2CH3)3 → (CH3)3Si-O-Si(CH3)(OCH2CH3)3.

[0075] A condensation reaction occurs between the surface of the first component coating and the second component, forming a coating layer. This fixing glue that combines photocuring 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. Thus, the protection strength of the protection tube 1 is further enhanced.

[0076] Control the curing temperature at 25 - 45 °C, under 0.1 - 0.2 MPa, and the curing time is 20 - 30 hours to ensure that the fixing glue is completely cured and the cured structure is uniform and stable, improving the stability of the structure formed by the curing of the fixing glue;

[0077] Steps 5 and 6: During the use of the protective tube 1, if it is damaged, the fluorescent layer generated by the absorption of sunlight by the graphene oxide-europium oxide composite can quickly locate the damaged position through the dark spots on the fluorescent layer. Moreover, the fixedly applied glue is reapplied and cured under natural sunlight, temperature, and air pressure. The coating repair can be simply and quickly carried out.

[0078] The fiberglass mesh 4 retains the extended fiberglass 42. The beneficial effect of the extended fiberglass 42 is that, while ensuring an appropriate number of fiber meshes, it ensures that the extended fiberglass 42 intersects as much as possible with each other to form a three-dimensional reticular structure, improving the overall strength and the structural strength of the protective tube 1 at the damaged part repaired with the fixedly applied glue.

[0079] Furthermore, the diameter of the fiberglass of the fiberglass mesh 4 is 5.5 - 9.5 μm; the area of the mesh body 41 is 0.45 - 1.95 mm 2 , and the mesh hole area is 0.01 - 0.18 mm 2 ; the length of the extended fiberglass 42 is 0.45 - 2.05 mm; in terms of the number of sheets per unit volume, there are 3 - 6 fiberglass meshes 4 per cubic centimeter; moreover, the mesh woven with fiberglass of 6 - 9 μm has good flexibility and certain toughness. The area of the mesh body 41 is 0.5 - 2 mm 2 , and the fragmented fiberglass mesh 4 formed is not easily knotted into a mass after being doped into the polymer moisture-proof sealing and potting glue as a filler. The mesh hole area is 0.01 - 0.19 mm 2 , allowing polydimethylsiloxane to pass through the mesh holes and having a stronger binding force with the fiberglass mesh 4; the length of the extended fiberglass 42 is 0.45 - 2.05 mm, and there are 3 - 6 fiberglass meshes 4 per cubic centimeter, ensuring that the extended fiberglass 42 intersects as much as possible with each other to form a three-dimensional reticular structure and improving the structural strength after the fixedly applied glue is cured.

[0080] In the first component, by weight percentage, polydimethylsiloxane is 19% - 31%, methyltriethoxysilane is 19% - 31%, fumed silica is 8% - 9.5%, tetraethoxysilane is 5% - 6%, and the graphene oxide-europium oxide composite is 1% - 2%.

[0081] In the second component, by weight percentage, the catalyst is 1% - 2%, the promoter is 8% - 9%, and the tackifier is 6% - 7%; the catalyst includes dibutyltin dilaurate; the promoter includes γ-aminopropyltriethoxysilane; the tackifier includes N-β-aminoethyl-γ-aminopropyltrimethoxysilane.

[0082] The rate of the condensation reaction can be adjusted by the second component, making the production process more flexible. The catalyst is dibutyltin dilaurate and the promoter is γ-aminopropyltriethoxysilane, which can accelerate the chemical reaction rate and is not consumed in the reaction itself. The tackifier is N-β-aminoethyl-γ-aminopropyltrimethoxysilane, which can help fix the shape of the glue.

[0083] During the production of the protection tube 1, the profiled aramid fiber is woven and wound around the outer wall of the protection tube 1 to form a profiled aramid woven layer 2. Then the carbon fiber is woven and wound around the profiled aramid woven layer 2 to form a carbon fiber woven layer 3. Next, the protection tube 1 wrapped with the profiled aramid 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. The first component is coated on the surface of the carbon fiber woven layer 3, and the second component is evenly sprayed on the first component. The electromagnetic emitter irradiates the place where the fixing glue is coated to excite the fluorescence of the graphene oxide-europium oxide composite. The fluorescence causes the fixing glue containing tetraethoxysilane to be photocured, forming strong chemical bonds on the surface of the first component, making the surface of the fixing glue have excellent structural strength. Thus, the fixing glue cures to form a composite material structure, enhancing the structure of the protection tube 1.

[0084] During use, the fixing glue of the graphene oxide-europium oxide composite is excited by sunlight to emit fluorescence. When the protection tube 1 is damaged, the fluorescence layer is damaged and dark spots appear, facilitating the positioning of the damaged location. The first component of the fixing glue is reapplied to the dark spots of the fluorescence layer, and the second component is sprayed on the first component coating. The reapplied fixing glue cures under natural sunlight, temperature, and air pressure, making the repair of the damaged protection tube 1 convenient and fast.

[0085] Example 2, refer to Figure 2 and Figure 3 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment.

[0086] When the glass fiber, which is one of the warp and weft, is drawn, using the molten state, it passes through the space where there is iron tetroxide powder dust floating in the air and adheres to the iron tetroxide powder. The particle size of the iron tetroxide powder is 0.45 - 0.25 μm. When the glass fiber, which is the other of the warp and weft, is drawn, using the molten state, it passes through the space where there is iron tetroxide powder dust floating in the air and adheres to the graphite powder. 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 relatively high temperature.

[0087] The auxiliary curing device includes an electromagnet. An oscillating circuit is connected to the electromagnet to generate a magnetic field with periodically changing directions. The electromagnet is close to the fixing glue. The iron oxide powder on the glass fiber can generate vibrations in the alternating magnetic field to expel the air in the fixing glue. At the same time of vibration, it also promotes the tightness of the fit between the glass fiber and the fixing glue, making the fixing glue mixed with the graphene oxide-europium oxide composite form a conductive fluid. At the same time, the electrons inside the graphite in the cured fixing glue are less active than in the liquid state, so they lose the conductive ability and exhibit a relatively high resistivity. The conductive path in the graphite of the cured fixing glue is also blocked due to the lack of sufficient electron concentration and fluidity.

[0088] Furthermore, the auxiliary curing device further includes an electromagnetic heating device. The electromagnetic heating device generates an alternating magnetic field, and the fixing glue is cured by heating through the electromagnetic heating device.

[0089] The electromagnetic heating device generates an alternating magnetic field. The glass fiber is bonded with soft magnetic powder. The soft magnetic powder has soft magnetic properties and can introduce the magnetic field deep into the fluid glue, forming 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 heating, thereby heating the fluid glue with conductive properties relatively uniformly.

[0090] When the fixing glue is cured, first an oscillating circuit is connected to the electromagnet to generate a magnetic field with periodically changing directions. The electromagnet is close to the fixing glue. The iron oxide powder on the glass fiber can generate vibrations in the alternating magnetic field to expel the air in the fixing glue. At the same time of vibration, it also promotes the tightness of the fit between the glass fiber and the fixing glue, making the fixing glue mixed with the graphene oxide-europium oxide composite form a conductive fluid. Then, an electromagnetic heating device generates an alternating magnetic field to generate eddy current heating in the conductive fluid, thereby heating the fluid glue with conductive properties relatively uniformly, making the cured structure of the fixing glue uniform and stable, and further improving the structural strength of the protection tube 1.

[0091] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel aspects and advantages of the subject matter described in this application. For example, the dimensions, scales, structures, shapes, and proportions of various elements, as well as parameter values (e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number, or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the functions described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0092] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments that are not relevant to the currently contemplated best mode of carrying out the present invention, or those that are not relevant to the implementation of the present invention, may not be described.

[0093] It should be understood that in the development of any actual implementation, as in any engineering or design project, a large number of specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine task of design, manufacturing, and production.

[0094] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A process for strengthening the structure of a power cable insulation protection tube, characterized in that: 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, the fixing glue includes a first component and a second component; the first component is coated on the carbon fiber braided layer, the first component includes polydimethylsiloxane, methyltriethoxysilane, white carbon black, tetraethoxysilane, graphene oxide-europium oxide composite and fragmented glass fiber mesh, the glass fiber mesh includes a mesh body and extended glass fiber, the mesh body is woven by warp and weft, at least part of the warp and at least part of the weft are longer than the mesh body, and the part exceeding the mesh body forms extended glass fiber; both the warp and weft are glass fibers, one of the glass fibers used as the warp or the glass fibers used as the weft is in a molten state during drawing, and is bonded with ferric oxide powder through a space where ferric oxide powder dust is floating in the air, and the other of the glass fibers used as the warp or the glass fibers used as the weft is in a molten state during drawing, and is bonded with graphite powder through a space where graphite powder dust is floating in the air; the second component is sprayed on the first component, and the second component includes a catalyst, a promoter, and a tackifier; Step 4, irradiating the graphene oxide-europium oxide complex with the electromagnetic emitter of the auxiliary curing equipment to excite fluorescence, and the first component is photocured under the fluorescence irradiation; the auxiliary curing equipment also includes an electromagnet, and an oscillation circuit is connected to the electromagnet, so that the electromagnet generates a magnetic field with periodic direction changes, and the ferroferric oxide powder on the glass fiber vibrates in the alternating magnetic field to expel the air in the fixing glue, while promoting the tightness of the glass fiber and the fixing glue to form a strong network structure, and at the same time, the first component and the second component undergo a condensation reaction to form a coating layer.

2. The process for strengthening the structure 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 0.45-1.95 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.

3. The process for strengthening the structure of the power cable insulation protection tube according to claim 1 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.

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

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

6. A process for repairing a damaged insulation protection tube structure of a power cable, characterized in that: The following steps are involved: Step 5, applying the protective tube produced by the power cable insulation protection tube structure reinforcement process described in any one of claims 1 to 5 to protect the power cable, and when the protective tube is damaged, the fluorescent layer formed by the graphene oxide-europium oxide composite will appear dark spots at the damaged part, and the damaged position can be located by the dark spots; Step 6: Re-apply the first component to the dark spots in step 5, and spray the second component on the first component. The re-applied areas are cured under natural sunlight, temperature and air pressure.

Images