CN115254506A - Device for manufacturing surface-layer continuous functional gradient coating for insulator and using method - Google Patents

Abstract

The invention discloses a device for manufacturing a surface layer continuous functional gradient coating for an insulator and a using method thereof. The invention can manufacture the insulator with the surface layer dielectric constant or conductivity changing continuously, the produced insulator has uniform dielectric constant or conductivity distribution, no interface charge accumulation, uniform electric field distribution under the action of the electric field and improved electric resistance. Meanwhile, the light-cured technology is adopted for manufacturing, the interface binding force is good, the surface layer is uniformly coated, the thickness control can be realized, and the technology controllability is improved.

Description

Device for manufacturing surface-layer continuous functional gradient coating for insulator and using method

Technical Field

The invention belongs to the technical field of manufacturing of high-voltage electrical equipment, and particularly relates to a device for manufacturing a surface layer continuous functional gradient coating for an insulator and a using method thereof.

Background

In recent years, remote and large-capacity power transmission and transformation systems are rapidly developed, application of ultra-high or extra-high voltage power equipment is increasingly widespread, problems and accidents caused by solid insulation faults are more prominent in the operation process of the equipment, and recent data of a southern power grid show that more than half of accidents are related to failure of an insulating part in Gas Insulated Switchgear (GIS) accidents in 2009-2013 years. Meanwhile, as the land area for electric power construction becomes tense, miniaturization and integration of electric power equipment are in a trend. However, due to the limitation of the electric strength, the insulation size of the existing insulation component cannot meet the requirements of miniaturization and compactness of equipment such as an underground substation and an offshore power transmission and transformation platform in open sea. It follows that discharge breakdown of critical insulating components has become a core problem that has limited the overall performance of high voltage devices and the development of device miniaturization.

It is generally considered that the distortion of the electric field is one of the main factors causing partial discharge and even flashover of the surface of the insulator. To control the electric field, manufacturers currently include methods to optimize the shape of the spacers, add shield electrodes, and embed grading rings, which are costly but inefficient. Recently, the use of functionally graded materials in insulators has shown impressive ability to mitigate electric field distortion at voltage. The functional gradient material is an advanced composite material with special functions, wherein the microstructure (including components, structures, physical parameters and the like) of the material is continuously or quasi-continuously changed at a spatial position, so that the macroscopic properties and functions of the material are correspondingly changed in a gradient manner, and the advanced composite material is suitable for different environmental requirements. Under the background, the scholars propose the concept of surface layer functional gradient materials, namely, the regulation and control of the surface electric field of the insulator are realized by designing the spatial gradient distribution of the dielectric constant or the conductivity of the surface layer of the insulator. At present, the surface layer functional gradient is mainly constructed by means of direct coating, plasma fluorination, magnetron sputtering, vapor deposition, laser cladding and the like, and the processes have a prominent problem that the spatial gradient distribution of the surface layer dielectric constant or conductivity is discontinuous, and electric field distortion is easily caused in a boundary area with the change of the dielectric constant or conductivity. Meanwhile, charge accumulation is easily generated at the gradient interface, and the electric field is further distorted, so that the surface power resistance is reduced. Meanwhile, the method has the defects of poor interface bonding force, uneven surface coating, difficult thickness control and the like.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a device and a method for manufacturing a continuous functional gradient coating for a surface layer of an insulator, aiming at the defects in the prior art, so that the electric field distortion caused by the nonuniform change of the dielectric constant is overcome, and the electrical resistance of the surface is further improved. Meanwhile, the defects of poor interface bonding between the coating and the substrate, uneven surface coating, difficult thickness control and the like in the prior art are overcome.

The invention adopts the following technical scheme:

a device for manufacturing a surface layer continuous functional gradient coating for an insulator comprises a static mixer, wherein a mixed solution with a dielectric constant or conductivity changing continuously along with time is arranged in the static mixer, an output end of the static mixer is connected with a spray gun through a guide pipe, the spray gun is arranged on the periphery of an insulator base, the insulator is placed on the insulator base, the insulator base and the spray gun are arranged in a light curing device, the insulator base is connected with an insulator base control module, the spray gun is connected with a spray gun control module, and the light curing device is connected with a curing control module.

Specifically, the outer side of the insulator base is provided with an annular spray gun base, and the spray guns are arranged on the annular spray gun base at intervals.

Further, the spray guns comprise four, and each spray gun is connected with the output end of the static mixer through a corresponding conduit.

Specifically, the outlet of the spray gun is provided with a rotating piece, and the rotating speed of the rotating piece is 10000-15000 rpm.

Specifically, the spray gun control module comprises a PLC module, and the PLC module is connected with the spray gun through a rotating motor and a stepping motor respectively.

Specifically, a stepping motor is arranged in the insulator base and electrically connected with the insulator base control module.

Specifically, the input end of the static mixer is connected with a first injection pump and a second injection pump through corresponding conduits, and epoxy resin composite material solutions with different dielectric constants or conductivities are filled in the first injection pump and the second injection pump respectively.

Furthermore, the first injection pump, the second injection pump, the static mixer and the conduit are arranged in a water bath device, and the water bath device is connected with a temperature display and control module.

Further, the first injection pump and the second injection pump are respectively connected with the injection pump control module.

In a second aspect, an embodiment of the present invention provides a method for using an apparatus for manufacturing a surface-layer continuous functionally graded coating for an insulator, including the following steps:

s1, mixing two inorganic fillers with photosensitive resin respectively, wherein the volume fraction of the mixture of the two inorganic fillers is 40%, and performing rotary stirring and vacuum degassing treatment to obtain two composite photosensitive resin materials with high dielectric constant or conductivity and low dielectric constant or conductivity;

s2, calculating the continuous gradient dielectric constant of the insulator simulation model or the electric field distribution under the conductive coating through finite element simulation, and determining the dielectric constant or the conductive distribution of the edge surface with the purposes of reducing the electric field intensity of the edge surface and improving the uniformity of the electric field of the edge surface;

s3, controlling the temperature to be 25-100 ℃ according to the along-plane dielectric constant or conductivity distribution obtained in the step S2, adjusting the injection rate of the two composite photosensitive resin materials obtained in the step S1, and mixing the two composite photosensitive resin materials to obtain a mixed solution with the dielectric constant or conductivity continuously changing;

s4, controlling the moving speed of the insulator base in the vertical direction through the insulator base control module, opening the curing control module to enable the photocuring device to be in a working state, controlling the flow rate of a spray gun through the spray gun control module, and spraying and curing the insulator on the insulator base;

and S5, after the spraying in the step S4 is finished, keeping the photocuring device in a working state, taking out the insulator after 30-120 min, and finishing the manufacturing of the coating.

Compared with the prior art, the invention has at least the following beneficial effects:

a manufacturing device of a surface layer continuous functional gradient coating for an insulator is characterized in that a solution mixed by a static mixer is output to a spray gun through a guide pipe and sprayed on the surface of the insulator through the spray gun; in the process, the spray gun is controlled by the spray gun control module to adjust the angle and the distance to enable the spray gun to be perpendicular to the surface of the insulator, and the distance is kept fixed; the flow rate of the spray gun is also controlled by the spray gun control module to adjust the thickness of the coating; the input of the insulator base control module drives the insulator to move in a translation mode in the vertical direction at a determined speed; the insulator base and the spray gun are arranged in the light curing device to ensure that the solution sprayed on the surface of the insulator is cured as soon as possible; the light curing control module adjusts the wavelength of light, the energy of light and the curing time in the light curing device through a button, and the curing effect is ensured.

Furthermore, the annular spray gun base plays a role in fixedly supporting the spray gun.

Furthermore, the annular base is provided with a spray gun at intervals of 90 degrees, so that the insulators can be sprayed with the coating with the same components at all positions at the same time, and the coating of the insulators is uniformly distributed.

Furthermore, the solution output by the spray gun can be quickly atomized by the high-speed shearing stress generated by the rotating piece, so that the solution is uniformly sprayed on the surface of the insulator; subsequently, the solution that loses shear stress rapidly becomes viscous, the force with the insulator surface further increases, and the rheology decreases.

Furthermore, the angle and the distance of the spray gun are adjusted through the spray gun control module, the spray gun can adapt to insulators of different types, the angle and the distance of the spray gun and the insulator are kept consistent in the spraying process, and the coating uniformity is controlled. Specifically, the angle distance of the spray gun is adjusted to be perpendicular to the surface of the insulator, the distance is kept consistent, and the coating can be sprayed uniformly. Meanwhile, the distance between the spray gun and the insulator is adjusted, the spraying range can be controlled, the spraying range is large when the distance is long, and the spraying range is concentrated when the distance is short. The coating thickness can be adjusted by spray gun flow rate control.

Furthermore, the stepping motor acts after receiving the action instruction of the control module to drive the insulator to move in a translation mode in the vertical direction, the spray gun is in a working state at the moment, and the dielectric constant or the conductivity of the solution sprayed at each moment is different, so that the continuous change of the surface coating of the insulator can be realized.

Further, the static mixer can realize uniform and rapid mixing of solutions in a syringe pump and a syringe pump. The dielectric constant or conductivity of the solution in the injection pump and the injection pump are different, the injection speed of the injection pump and the injection pump is adjustable, and the mixing proportion can be controlled so as to control the dielectric constant or conductivity of the mixed solution.

Furthermore, the controllable solution viscosity of water bath device guarantees through setting up different water bath temperatures that the solution viscosity is guaranteed to fluctuate at an within range, can guarantee that solution does not block up pipe, static mixer, guarantees that the solution viscosity and the velocity of flow of supplying with the spray gun are stable, and then guarantee the spraying effect.

Furthermore, the injection pump control module can realize the control of the injection speed of the injection pump, further realize the control of the proportion of the solution flowing through the static mixer and realize the control of the dielectric constant or the conductivity of the mixed solution; the device and the method can realize the preparation of the continuous functional gradient coating on the surface of the insulator. The problem of protruding interface in the discontinuous gradient coating scheme is solved, the uniformity of an electric field is improved, and the electrical resistance of the edge surface is improved.

In conclusion, the invention can manufacture the insulator with the surface layer of which the dielectric constant or the conductivity is continuously changed, the produced insulator has uniform dielectric constant or conductivity distribution, no interface charge accumulation exists, the electric field is uniformly distributed under the action of the electric field, and the electric resistance is improved. Meanwhile, the light-cured technology is adopted for manufacturing, the interface binding force is good, the surface layer is uniformly coated, the thickness control can be realized, and the technology controllability is improved.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a view showing the construction of the apparatus of the present invention;

FIG. 2 is a diagram showing a relative dielectric constant distribution;

fig. 3 is a diagram of simulation results of the electric field distribution along the surface of three insulators.

Wherein: 1. a first syringe pump; 2. a second syringe pump; 3. a static mixer; 4. a water bath device; 5. a temperature display and control module; 6. an injection pump control module; 7. a conduit; 8. an annular nozzle base; 9. an insulator base; 10. a spray gun; 11. a light-curing device; 12. a curing control module; 13. a spray gun control module; 14. insulator base control module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.

Referring to fig. 1, the present invention provides an apparatus for manufacturing a surface coating with a continuous functional gradient coating for an insulator, comprising: the device comprises a first injection pump 1, a second injection pump 2, a static mixer 3, a water bath device 4, a temperature display and control module 5, an injection pump control module 6, a guide pipe 7, an annular spray head base 8, an insulator base 9, a spray gun 10, a light curing device 11, a curing control module 12, a spray gun control module 13 and an insulator base control module 14.

The first injection pump 1 and the second injection pump 2 are respectively connected with the input end of the static mixer 3 through corresponding guide pipes 7, the output end of the static mixer 3 is connected with four spray guns 10 arranged on an annular spray gun base 8 through four guide pipes, an insulator base 9 is positioned at the central positions of the four spray guns 10, and an insulator is placed on the insulator base 9.

The first injection pump 1 and the second injection pump 2 are respectively connected with an injection pump control module 6, epoxy resin composite material solutions with different dielectric constants or conductivities are respectively filled in the first injection pump 1 and the second injection pump 2, and the speed of the solution pushed by the first injection pump 1 and the second injection pump 2 is controlled by the injection pump control module 6.

Under the control of the injection pump control module 6, epoxy resin composite material solutions with different dielectric constants or conductivities in the first injection pump 1 and the second injection pump 2 are injected into the static mixer 3 through the guide pipe 7 at different speeds for mixing, and mixed solutions with the dielectric constants or conductivities changing continuously along with time are obtained by controlling the propelling speeds of the different injection pumps.

In order to control the viscosity of the epoxy resin composite material solution and the mixed solution, a first injection pump 1, a second injection pump 2, a static mixer 3 and a conduit 7 are all arranged in a water bath device 4, the water bath device 4 is connected with a temperature display and control module 5, the temperature is controlled by the temperature display and control module 5 so as to control the viscosity of the solution, the viscosity of the solution is reduced by increasing the temperature, and the temperature control range of the temperature display and control module 5 is 0-100 ℃.

The mixed solution is divided into four parts through a guide pipe 7, the four parts are respectively connected into 4 spray guns 10, in order to ensure that the coating of the insulator is uniform in all directions, the spray guns 10 are arranged on an annular spray gun base 8, and the spray guns are arranged at intervals of 90 degrees.

Wherein, the outlet of the spray gun 10 is additionally provided with a high-speed rotating part, so that the spray gun 10 has a rotary atomization function, and when the solution is supplied to the outlet of the spray gun 10, the solution generates a shear thinning effect under the action of high shear stress; when the mixed solution is sprayed on the surface of the insulator, the viscosity of the mixed solution losing the action of the shear stress is rapidly increased and is attached to the surface of the insulator, and the uniform coating of the insulator is ensured by the device.

The high-speed rotating part utilizes the shearing stress of the high-speed rotating part to ensure that the solution is stretched on the surface of the rotating part and moves towards the edge of the rotating part at an increasing speed, and when the solution leaves the edge of the rotating part, the solution is converted into fine fog drops.

The working state of the spray gun 10 is controlled by a spray gun control module 13, and the thickness of the coating can be controlled by controlling the flow rate of the spray gun 10; for guaranteeing that the coating is even, spray gun control module 13 has angle and apart from automatic control function, can adapt to the insulator of different grade type, guarantees that spraying in-process spray gun 10 keeps unanimous with insulator angle, distance, and spray gun control module adopts real-time supervision's closed-loop control mode control spray gun, specifically does: the spray gun control module inputs the distance, the angle and the flow speed as fixed values. The spray gun has an infrared distance measurement function, can measure the distance and the angle between the spray gun mouth and the surface of the insulator in real time and feed back the distance to the spray gun control module, the spray gun control module compares a measured value with a fixed value, sends a command to drive the rotating motor to adjust the angle to the input fixed value, and sends a command to drive the stepping motor to move so as to keep the distance between the stepping motor and the surface of the insulator as the input fixed value.

The insulator is placed on the insulator base 9, and in order to prepare the continuous gradient coating, the insulator base 9 is provided with a stepping motor with a speed control function and can control the position of the insulator to lift; the lifting speed of the insulator base 9 is controlled by an insulator base control module 14.

The annular spray head base 8, the insulator base 9 and the spray gun 10 are all arranged in the light curing device 11, and when the spray gun 10 works, the light curing device 11 is also in a working state, so that the curing of the surface coating of the insulator is accelerated. The light curing device 11 is controlled by a curing control module 12 to control the wavelength, light energy and light curing time of light.

The invention relates to a using method of a device for manufacturing a surface layer continuous functional gradient coating for an insulator, which comprises the following steps:

a manufacturing device for a continuous functional gradient coating on the surface layer; placing the insulator on an insulator base 9 to prepare photosensitive resin;

s1, providing two inorganic fillers with high dielectric constant or high conductivity and low conductivity respectively, wherein the inorganic filler with high dielectric constant or high conductivity meets the requirement that the dielectric constant of the coating is highest when the volume fraction of the inorganic filler is maximal. The particle size distribution of the two inorganic fillers is similar, the two inorganic fillers and the photosensitive resin are respectively mixed, in order to ensure that the mixture is flowable, the mass fraction of the mixture of the two inorganic fillers is fixed at 30-40% so as to ensure the flowability, the two composite photosensitive resin materials with high dielectric constant or conductivity and low dielectric constant or conductivity are obtained through rotary stirring and vacuum degassing treatment, the two treated composite photosensitive resin materials are respectively filled into a first injection pump 1 and a second injection pump 2, the temperature of a water bath device 4 is adjusted, and the good flowability of the solution is ensured;

s2, calculating the electric field distribution under the continuous gradient dielectric constant or the conductivity coating of the insulator simulation model through finite element software simulation, and determining the dielectric constant or the conductivity distribution of the edge surface with the aim of reducing the electric field intensity of the edge surface;

this dielectric constant or conductivity distribution is continuously varied.

S3, determining two different dielectric constants or conductivity proportions in a mixed solution obtained after the first injection pump 1 and the second injection pump 2 are mixed in the step S1 according to the dielectric constant or conductivity distribution along the surface obtained in the step S2, controlling the temperature to be 25-100 ℃ according to the determined content of the inorganic filler, and adjusting the injection rates of the injection pump 1 and the injection pump 2 along with time on the premise of ensuring that the total mass fraction of the two fillers in the mixed solution is 40%, so that the dielectric constant or conductivity can be continuously changed;

s4, setting an injection pump control module 6 according to the determined injection rate of the injection pump; according to the determined movement rate of the stepping motor of the insulator base 9, an insulator base control module 14 is arranged; setting a spray gun control module 13 according to the determined coating thickness, starting injection by the first injection pump 1 and the second injection pump 2, enabling the spray gun 10 and the insulator base 9 to be in a running state, and opening a curing control module 12 to enable the light curing device 11 to be in a working state;

generally, the dielectric constant or conductivity of the mixture depends on the volume fraction of the high dielectric constant or conductivity inorganic filler in the composite system, and thus, the dielectric constant or conductivity of the mixture can be determined by simply calculating the dielectric constant or conductivity of the high dielectric constant or conductivity at different volume fractions, and the determination is made according to the following formula

Wherein beta is the relative dielectric constant or conductivity of the mixture, beta_iIs the relative dielectric constant or conductivity, beta, of a high dielectric constant or conductivity inorganic filler_mIs the relative dielectric constant or conductivity of the photosensitive resin, v is the volume fraction of the inorganic filler with high dielectric constant or conductivity, and is taken as 0 to 40 percent.

In order to adjust the high dielectric constant or conductivity change rate (the speed of the dielectric parameter distribution change along the axis direction of the insulator) of the coating, the moving speed of the stepping motor of the insulator base 9 needs to be determined; when the syringe pumps are at the same injection rate, the faster the stepper motor moves, the longer the distance the spray head travels per unit time, and the greater the change in dielectric constant or conductivity distribution along the axis.

In order to adjust the thickness of the coating, the flow speed of the spray gun is controlled by arranging the spray gun control module 13, different spray gun flow speeds correspond to different coating thicknesses, and the thickness is increased when the flow speed is increased.

S5, after injection is finished, closing the spray gun control module to enable the spray gun to be in a closed state, setting the insulator base control module to close the insulator base stepping motor, and keeping the light curing device in a working state for 30min; and taking out the insulator to finish the coating manufacture.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The COMSOL software is utilized to simulate the distribution of the surface electric field of an original insulator, a discontinuous dielectric gradient coating insulator and a continuous dielectric gradient coating insulator.

Wherein the relative dielectric constant of the original insulator matrix is 4; the discontinuous dielectric gradient coating insulator is provided with 10 layers in total.

The relative dielectric constant of the first layer is 1=300;

the relative permittivity of the second layer is 2=200;

the relative dielectric constant of the third layer is 3=100;

the relative dielectric constant of the other layers as the substrate is 4;

the continuously variable dielectric gradient has a maximum relative permittivity of 300 and a minimum relative permittivity of 4,

referring to FIG. 2, the relative permittivity at the triple point is highest and decreases from radial to uniform 4.

Referring to fig. 3, the electric field intensity of the original insulator is highest at 0 creepage distance (here, the triple point, i.e., the air-insulation-conductor junction) and is 5.84kV/mm, the electric field intensity of the insulator with the discontinuous dielectric gradient coating is reduced to 3.97kV/mm at 0 creepage distance, but the electric field is distorted at the coating junction, the electric field intensity of the insulator with the continuous gradient is reduced to 3.95kV/mm at 0 creepage distance, and the electric field intensity of the creepage is not distorted, and the electric field intensity is uniformly changed.

In conclusion, the device for manufacturing the surface layer continuous functional gradient coating of the insulator and the using method thereof realize the continuous change of the surface gradient coating of the insulator, overcome the problems of electric field distortion and other interfaces caused by the sudden change of the physicochemical parameters of the coating, and further improve the electric field distribution. The invention can also be applied to the preparation of continuous conductivity gradient coatings, and can effectively solve the problem of interface charge accumulation when direct current voltage is applied. Meanwhile, the technical scheme of spray gun spraying combined with photocuring curing overcomes the defects of poor interface bonding between the coating and the substrate, uneven surface coating, difficulty in controlling thickness and the like in the prior art, can obtain a coating with smooth surface, good interface bonding force and controllable thickness, and has better industrial application potential.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a continuous functional gradient coating manufacturing installation of surface course for insulator, which is characterized in that, including static mixer (3), be provided with the mixed solution of dielectric constant or conductivity continuous variation with time in static mixer (3), spray gun (10) are connected through pipe (7) to the output of static mixer (3), spray gun (10) set up around insulator base (9), the insulator is placed on insulator base (9), insulator base (9) and spray gun (10) set up in photocuring device (11), insulator base (9) are connected insulator base control module (14), spray gun (10) are connected spray gun control module (13), photocuring device (11) are connected solidification control module (12).

2. The manufacturing device of the surface continuous functional gradient coating for the insulator is characterized in that an annular spray gun base (8) is arranged on the outer side of the insulator base (9), and the spray guns (10) are arranged on the annular spray gun base (8) at intervals.

3. Device for producing a continuous functional gradient coating for a coating for an insulator according to claim 2, characterised in that the number of spray guns (10) is four and each spray gun (10) is connected to the output of the static mixer (3) by means of a corresponding conduit (7).

4. Device for producing a surface layer continuous functionally graded coating for insulators according to claim 1, characterised in that at the outlet of the spray gun (10) a rotating member is provided, the rotating member having a speed of rotation of 10000 to 15000rpm.

5. Device for producing a surface layer continuous functional gradient coating for insulators according to claim 1, characterised in that the spray gun control module (13) comprises a PLC module, which is connected to the spray gun (10) via a rotary motor and a stepper motor, respectively.

6. Device for producing a surface layer continuous functional gradient coating for an insulator according to claim 1, characterized in that a stepping motor is arranged in the insulator base (9), and the stepping motor is electrically connected with the insulator base control module (14).

7. The apparatus for manufacturing a surface layer continuous functional gradient coating for an insulator according to claim 1, wherein the input end of the static mixer (3) is connected to the first injection pump (1) and the second injection pump (2) through corresponding conduits, and epoxy resin composite solutions having different dielectric constants or conductivities are respectively filled in the first injection pump (1) and the second injection pump (2).

8. The apparatus for manufacturing continuous functionally graded coating for surface layer of insulator according to claim 7, wherein the first syringe pump (1), the second syringe pump (2), the static mixer (3) and the conduit are disposed in a water bath device (4), and the water bath device (4) is connected with a temperature display and control module (5).

9. The apparatus for manufacturing an insulator with a continuous functional gradient coating of the surface layer according to claim 7, wherein the first syringe pump (1) and the second syringe pump (2) are respectively connected with a syringe pump control module (6).

10. The use method of the manufacturing device of the surface continuous functional gradient coating for the insulator according to the claim 1 is characterized by comprising the following steps:

s1, respectively mixing two inorganic fillers with photosensitive resin, wherein the volume fractions of the two inorganic filler mixtures are both 40%, and performing rotary stirring and vacuum degassing treatment to obtain two composite photosensitive resin materials with high dielectric constant or conductivity and low dielectric constant or conductivity;

s2, calculating the continuous gradient dielectric constant of the insulator simulation model or the electric field distribution under the conductive coating through finite element simulation, and determining the dielectric constant or the conductive distribution of the edge surface with the purposes of reducing the electric field intensity of the edge surface and improving the uniformity of the electric field of the edge surface;

s3, controlling the temperature to be 25-100 ℃ according to the along-plane dielectric constant or conductivity distribution obtained in the step S2, adjusting the injection rate of the two composite photosensitive resin materials obtained in the step S1, and mixing the two composite photosensitive resin materials to obtain a mixed solution with continuously changed dielectric constant or conductivity;

s4, controlling the moving speed of the insulator base in the vertical direction through the insulator base control module, opening the curing control module to enable the photocuring device to be in a working state, controlling the flow rate of a spray gun through the spray gun control module, and spraying and curing the insulator on the insulator base;

and S5, after the spraying in the step S4 is finished, keeping the photocuring device in a working state, taking out the insulator after 30-120 min, and finishing the manufacturing of the coating.

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