1668 results about "Composite insulators" patented technology

The invention discloses a silicone rubber for a composite insulator, wherein the silicone rubber comprises the following raw materials in parts by weight: 30-50 parts of methyl vinyl silicone rubber A, 50-70 parts of methyl vinyl silicone rubber B, 25-50 parts of fumed silica, 100-130 parts of aluminium hydroxide, 1-6 parts of silane coupling agent, 0.2-2 parts of ultraviolet absorber, 2-6 parts of zinc oxide, 0.5-3 parts of triethanolamine, 0.2-1 parts of stearic acid, 0.5-2 parts of hydrogen-containing silicone oil, 0.2-1 parts of vinyl silicone oil, 0.5-3 parts of color masterbatch rubber, 2-6 parts of hydroxyl silicone oil and 0.5-1 parts of vulcanizing agent. The silicone rubber provided by the invention can achieve the following performances: the tensile strength is larger than 4 MPa; the breaking elongation is larger than 350%; the peel strength is larger than or equal to 12 KN.m<-1>; the shore hardness is 60+ / -5 degrees; the thermal aging tensile strength retention is larger than or equal to 90%; the anti-creep track passes a grade of 1A4.5; the flame retardance reaches a grade of FV-0; the average static contact angle is larger than 105 degrees; the electrical surface resistivity is larger than 2*10<15> omega; the dielectric constant is smaller than 3.8; and the dielectric loss angle tangent is smaller than 0.01.

The invention relates to a test apparatus of a DC gas insulated metal enclosed transmission line (GIL). The apparatus has the test capabilities of SF6 gas clearance insulation tests, insulator surface flashover characteristic tests and metallic conducting particle tests, and can well meet insulation test requirements of the DC GIL. The apparatus approximately takes the shape of 'L', and comprises a high-voltage lead end, a high-voltage equalizing ring and a silicon rubber composite insulator high-voltage bushing in the vertical direction and high-voltage guide electrodes which are coaxially distributed and positioned in the middle along the horizontal direction, a peripheral test apparatus shell, and a transverse test apparatus shell which is composed of three air chambers together.

A method of fabricating a double gate, FINFET device structure in a silicon on insulator layer, in which the channel region formed in the SOI layer is defined with a narrowed, or necked shape, and wherein a composite insulator spacer is formed on the sides of the device structure, has been developed. A FINFET device structure shape is formed in an SOI layer via anisotropic RIE procedures, followed by a growth of a silicon dioxide gate insulator layer on the sides of the FINFET device structure shape. A gate structure is fabricated traversing the device structure and overlying the silicon dioxide gate insulator layer located on both sides of the narrowest portion of channel region. After formation of a source / drain region in wider, non-channel regions of the FINFET device structure shape, composite insulator spacers are formed on the sides of the FINFET shape and on the sides of the gate structure. Metal silicide is next formed on source / drain regions resulting in a FINFET device structure featuring a narrow channel region, and surrounded by composite insulator spacers located on the sides of the device structure.

Flash memory cells are provided that include a first source / drain region and a second source / drain region separated by a channel region. A first gate opposes. A first gate insulator separates the first gate from the channel. The first gate insulator includes a graded composition gate insulator. A second gate is separated from the first gate insulator by a second gate insulator. The above memory cells produce gate insulators with less charging at the interface between composite insulator layers and provide gate insulators with low surface state densities. The memory cells substantially reduce large barrier heights or energy problems by using dielectrics having suitably, adjustably lower barrier heights in contact with the polysilicon floating gate. Such adjustable barrier heights of controlled thicknesses can be formed using a silicon suboxide and a silicon oxycarbide dielectrics prepared according to the process as described herein.

A composite insulator containing means for providing early warning of impending failure due to stress corrosion cracking, flashunder, or destruction of the rod by discharge activity conditions is described. A composite insulator comprising a fiberglass rod surrounded by a polymer housing and connected with metal end fittings on either end of the rod is doped with a dye-based chemical dopant. The dopant is located around the vicinity of the outer surface of the fiberglass rod. The dopant is formulated to possess migration and diffusion characteristics, and to be inert in dry conditions and compatible with the insulator components. The dopant is positioned within the insulator such that upon the penetration of moisture through the housing to the rod through a permeation pathway in the outer surface of the insulator, the dopant will become activated and will leach out of the same permeation pathway or diffuse through the housing. The activated dopant then creates a deposit or stain on the outer surface of the insulator housing. The dopant comprises an oil-soluble dye, an indicator, or a stain compound that can either be visually identified, or is sensitive to radiation at one or more specific wavelengths. The dopant could also be formulated by a nanoparticle enabled material. Deposits of activated dopant on the outer surface of the insulator can be detected upon imaging of the outer surface of the insulator by appropriate imaging instruments or the naked eye.

A method of fabricating a MOSFET device featuring a raised source / drain structure on a heavily doped source / drain region as well as on a portion of a lightly doped source / drain (LDD), region, after removal of an insulator spacer component, has been developed. After formation of an LDD region a composite insulator spacer, comprised of an underlying silicon oxide spacer component and an overlying silicon nitride spacer component, is formed on the sides of a gate structure. Formation of a heavily doped source / drain is followed by removal of the silicon nitride spacer resulting in recessing of, and damage formation to, the heavily doped source / drain region, as well as recessing of the gate structure. Removal of a horizontal component of the silicon oxide spacer component results in additional recessing of the heavily doped source / drain region, and of the gate structure. A selective epitaxial growth procedure is then used to form a raised, single crystalline silicon structure on the recessed and damaged heavily doped source / drain and LDD regions, while a polycrystalline silicon structure is grown on the underlying recessed gate structure. Metal silicide is then formed on the raised, single crystalline silicon structure and on the polycrystalline silicon structure.

The invention provides a multi-dimensional parameter assessment method of an aging degree of a running composite insulator. The method comprises the following steps: firstly measuring hardness, hydrophobicity, a surface defect area, an infrared absorption peak corresponding to a Si-O-Si group, a trap charge amount and a flashover voltage of a high-temperature vulcanized silicone rubber test sample of an umbrella skirt of a target composite insulator; then performing quantitative processing on the measured data, and scoring the aging degrees of the processed feature parameters; performing weighted summation on the scores of the feature parameters to obtain a comprehensive feature parameter characterizing the aging degree of the composite insulator; and finally determining the aging degree of the insulator according to a corresponding relation between the size of the comprehensive feature parameter and the grade of the aging degree. According to the multi-dimensional parameter assessment method provided by the invention, the microscopic electrical characteristics and microscopic physical and chemical characteristics of the umbrella skirt material of the composite insulator are combined with macroscopic characteristics to realize the comprehensive assessment of the aging degree of the composite insulator. By adoption of the method, the one-sidedness of the traditional assessment method is avoided, and thus the accuracy of an assessment result is guaranteed.

The invention discloses a method and system for detecting a composite insulator interface. The method comprises the following steps of: sampling from a composite insulator to be detected to obtain an experimental group insulator and a reference group insulator; subsequently carrying out a boiling experiment on the experimental group insulator; installing the reference group insulator and the experimental group insulator in electrode structures of respective high voltage circuit and exerting voltage to the electrode structures; detecting leakage currents of the experimental group insulator and the reference group insulator by using leakage current detecting devices in the high voltage circuits; and simutaneously detecting the surface temperatures of the experimental group insulator and the reference group insulator by using a surface temperature tester; and judging whether a defect such as debonding exists at the interface of a protective jeacket and a core bar of the composite insulator to be detected according to the leakage current and the surface temperature of the experimental group insulator and the reference group insulator. With the adoption of the method and the system, the defect such as debonding of the protective jacket and the core bar can be identified effectively with high detection efficiency and low detection cost.

The invention discloses a nuclear magnetic resonance sensor used for the nondestructive aging resonance of an umbrella skirt of a composite insulator. The sensor comprises a permanent magnet structure and a plane radio-frequency coil, wherein the permanent magnet structure mainly consists of two cylindrical permanent magnet sheets of same specification, the two cylindrical permanent magnet sheets are oppositely and coaxially arranged, and the permanent magnet structure is used for producing a static state main field B0; and the permanent magnet structure is provided with a slide mechanism, so that the distance between the permanent magnet sheets can be adjusted so as to adapt to umbrella skirts of different thickness. The plane radio-frequency coil is formed by two spiral coils which are connected in series on a plane according to the reverse direction of the magnetic field, and the plane radio-frequency coil is used for generating radio-frequency magnetic field B1 orthometric with the main magnetic field in a target region, and detecting return signals produced by a sample to be tested. During the aging detection of the umbrella skirt of the composite insulator, the slide mechanism is adjusted to enable the sensor to clamp the umbrella skirt to be tested, so that the transverse relaxation time T2 of the umbrella skirt can be measured, and further, the aging degree of the umbrella skirt can be judged according to the transverse relaxation time T2. The open-type nuclear magnetic resonance sensor has the advantages of small volume, light weight, and convenience in engineering field detection.

An evaluation method of the aging degree of an operational composite insulator comprises the steps of firstly utilizing a three-electrode volume resistivity test device to measure the volume resistivity of a round-slice high-temperature silicon sulfide rubber sampler which is cut from the surface of the net-hanging operational composite insulator at different temperatures, plotting a curve, calculating the linear fitting R2 of the curve, and finally comprehensively determining the aging degree of the composite insulator according to the change situation of the linear fitting R2 of the curve and the volume resistivity of the round-slice high-temperature silicon sulfide rubber sampler. According to the present invention, the aging degree of the composite insulator is determined comprehensively according to the change situation of the linear fitting R2 of the curve and the volume resistivity of the round-slice high-temperature silicon sulfide rubber sampler, so that the operation is simple and convenient, and the accuracy of the evaluation result is improved, and accordingly, the reliable operation of a high voltage power transmission line is guaranteed.

The invention relates to a hollow composite insulator used in 1100kV composite apparatus in power industry, and a producing method of the insulator. The insulator comprises an end connecting part, an insulation tube and an umbrella. The end connecting parts are stuck on the two ends of the winding tube. The invention is characterized in that: an integrated umbrella is stuck at the out side of an insulation tube; the insulation tube is a wound tube with an inner liner; the umbrella is an injecting-formed part made of high-temperature vulcanization silicon rubber, and because the inner liner of the insulation tube is an epoxy resin adhesive and SF6 decomposition mixing and solidifying structure, the anti-corrosion performance of the product is greatly increased; the umbrella is hot-solidified on the surface of the insulation tube at high vacuum and high temperature, so the connecting strength between the umbrella and the insulation tube is high, and the product performance is more stable and reliable. When winding the insulation tube, a track is first simulated on a computer, and then pins are fixed on both shaft ends of the mold core. When winding, a tension mechanism with even and constant tensile force is used for control, thus realizing even paving of the glass fiber.

The invention discloses a method for detecting a composite insulator based on multi-spectrum. The method comprises: selecting a detection device; under a same operation condition, performing visible light detection, infrared detection, and UV detection of the same composite insulator by using the detection device to obtain detection images of the composite insulator; performing comparison of a partial discharge lighting spot of the visible light image, a partial hot spot of the infrared image, and an electric corona spot of the UV image; performing comparison of visual light images, infrared images, and UV images of different composite insulators of the same pole tower of the same line under the same operation condition; establishing a multi-spectrum detection database according to each composite insulator; and performing data comparison and finding out existing data difference according to detection data in a certain period. According to the method, visual light detection, infrared detection, and UV detection can be organically combined; advantages are complemented; and electrified detection of the insulator is easy to perform. A defect of the composite insulator can be discovered in time, so that large-area tour-inspection is convenient to develop.

The invention provides a method for judging the aging degree of an umbrella skirt of a composite insulator, which aims to solve the problem of low accuracy of the method for judging the aging degree of the umbrella skirt of the composite insulator in the prior art. The method comprises the following steps of: sampling an umbrella skirt sample at different positions to obtain slices; performing a thermally stimulated current (TSC) test on the slices respectively; calculating trapped electric charge quantity and trap levels of the slices through a TSC curve obtained by the test; and judging the aging degree of the umbrella skirt sample according to the trapped electric charge quantity and the trap levels of the slices. Due to the adoption of the technical scheme, the aging characteristics of the umbrella skirt can be estimated from the perspective of microcosmic electrical characteristics by directly measuring the characteristics of traps inside an umbrella skirt material of the composite insulator, and a basis is provided for on-site operation and maintenance of the composite insulator of an electric power system.

The invention discloses a micro-nano silicone rubber composite material for a composite insulator and a preparation method of the micro-nano silicone rubber composite material. The micro-nano silicone rubber composite material comprises the following raw material components in parts by mass: 100 parts of raw silicone rubber, 15-30 parts of fumed silica, 30-40 parts of micron aluminium hydroxide, 0-15 parts of nanometre aluminium hydroxide, 1-2 parts of a structurized control agent and 1-26 parts of a silane coupling agent. According to the invention, a micro-nano tracking-resistant filler is compounded with the silicon rubber in a proper volume ratio and by a proper process to form a special interface intermediate phase, namely, the microstructure and the compactness of the composite material are obviously improved and enhanced respectively, the content of aluminium hydroxide is reduced, the mechanical performance of the composite material is kept, and the tracking-resistant silicon rubber composite material is prepared.

The invention relates to a method and device for comprehensive on-line monitoring of hidden dangers of transmission line faults, which are installed on the transmission line to detect faults such as cracking of composite insulators, suspended discharge of fittings, vegetation flashover, pollution of insulators, and ice flashover of insulators, etc., which occur during long-term operation of the line. The traveling wave current signal generated by the hidden danger discharge is monitored online; for the collected traveling wave current waveform information, firstly, the type of the hidden trouble is identified by means of shape fitting and s-transformation; then the severity level of the hidden trouble is determined according to the wavelet energy spectrum; finally Locate the hidden trouble point by using double-end positioning or single-end positioning method. The invention creatively proposes to use the discharge current when a hidden trouble occurs as the detection object to realize the identification, positioning and early warning of the hidden trouble, and solves the problems of low efficiency, high cost and low reliability of traditional monitoring methods mainly based on manual inspection at present. Problems, prevent transmission line failures before they happen, and improve the stable operation level of the power grid.

The invention provides a method for detecting a high optical spectrum of a composite insulator. The method comprises the following steps of: 1) adopting a hyperspectral imager to perform imaging on the composite insulator, and obtaining a high optical spectrum image of the composite insulator; 2) carrying out pretreatment on the high optical spectrum image of the composite insulator, wherein the pretreatment comprises geometric correction and radiometric correction, and obtaining precise spectral information; and 3) using a special analysis platform to carry out treatment analysis, determining a running state of the composite insulator, judging result output / display, and judging whether the composite insulator needs to be replaced. The method for detecting the high optical spectrum of the composite insulator provided by the invention can carry out non-contacting type detection on the composite insulator, and a worker does not need to climb a tower; and the site operation required time is short, when the high hyperspectral imager obtains data, the information of multiple composite insulators is obtained at the same time, thereby being convenient for late stage treatment analysis on the multiple composite insulators simultaneously, achieving the purpose of batch detection, and meeting the requirements of composite insulator state detection of China.

The invention belongs to the technical field of composite insulators, and particularly relates to recovery and reutilization of a waste composite insulator silicon rubber material. The method comprises the following steps: recovering a waste composite insulator silicon rubber material, cleaning, and crushing, thus obtaining composite insulator silicon rubber powder; performing surface modification or regeneration treatment on the composite insulator silicon rubber powder, thus obtaining modified or regenerated composite insulator silicon rubber powder; and using one or more of the composite insulator silicon rubber powder and the modified / regenerated composite insulator silicon rubber powder as a rubber powder filler, wherein the waste composite insulator silicon rubber material comprises defectives, waste and scraps generated in composite insulator manufacturing as well as structured silicon rubber, cured rubber and other materials in a composite insulator silicon rubber refining process. According to the invention, the problem on recovery and regeneration of waste composite insulators in a power grid is solved, and space occupying, environmental pollution and resource waste caused by the waste composite insulator silicon rubber are avoided.

The invention belongs to the technical field of detection of performance of electric transmission line insulators, and discloses a method for automatically identifying hydrophobic grades of composite insulators. The method includes the steps of image enhancement, image filtering, image segmentation, image feature quantity extraction, neural network identification model establishment and the like. By analyzing hydrophobic images of the composite insulators, automatic identification of the hydrophobic grades of the composite insulators is achieved. Human factor influences are eliminated, the method is high in accuracy of the judgment result, easy to operate and capable of automatically identifying the hydrophobic grades of the insulators different in voltage grade, type, manufacturer, foul degree grade, operation age limit and the like.

The invention discloses an unmanned plane based live-line test apparatus for hydrophobicity of composite insulator of power transmission line. The Unmanned plane based live-line test apparatus for hydrophobicity of composite insulator of power transmission line comprises an unmanned plane, wherein, the unmanned plane is provided with a wireless remote controller, a water spraying apparatus and an image acquisition and transmission apparatus, the water spraying apparatus comprises a water tank, a water pump and a nozzle, wherein, the water pump and the water tank are connected with each other, and the water pump is connected with the nozzle by a water spraying pipe; the image acquisition and transmission apparatus comprises a pick-up head and an image transmitter, and the pick-up head and the image transmitter are connected with each other; the wireless remote controller comprises a wireless remote control receiver, a wireless communication module, a nozzle remote control mechanism, a pick-up head remote control mechanism and a water pump starter, and the wireless remote control receiver is respectively connected with the nozzle remote control mechanism, the pick-up head remote control mechanism and the water pump starter; the nozzle remote control mechanism is connected with the nozzle, the pick-up head remote control mechanism is connected with the pick-up head, and the water pump starter is connected with the water pump. The apparatus provided by the invention can effectively eliminate hidden troubles and is convenient and easy to operate, thereby reducing labor intensity of personnel to a large degree and guarantying personal safety.

The invention relates to a spiral-wound composite insulator bar for high-voltage transmission line in electric network and method for making same. The spiral-wound composite insulator bar has metal rings inlayed in its two ends. On the external diameter of metal rings wounded filaments, which are bound with, resinate glass fiber. The method comprises the steps of: getting some compound; melting resin; mixing melted glass fiber with resin solution and stirring with 150 turns per minute; enwinding continuously and modeling the glass fiber and epoxy resin radical solution in high temperature. The invention has the advantage of simple structure and low cost, of reducing tower's load and the effective distance from current transmission line to the earth. The spiral-wound composite insulator bar with cross wrap can meet the requirement of tensile strength, increasing bending strength.

This invention relates to a method for testing insulator remote surface corona based on an optical amplifier including: a, aligning an optical location system to a discharge position of a being tested compound insulator to get an ultraviolet signal generated by weak discharging along the surface of the insulator to be amplified by the optical amplifier and converted to an electric signal to be collected, stored and analyzed by a computer with a data collection method to decide the corona position and acute state of its discharge.

The invention discloses an ultrasonic guided-wave detecting system for the defect of a composite insulator. The ultrasonic guided-wave detecting system comprises a system master control computer, a signal generator, a power amplifier, a piezoelectric paster and a digital oscilloscope. The invention further discloses a detecting method applied to the ultrasonic guided-wave detecting system for the defect of the composite insulator. The detecting method comprises the following steps that 1, the frequency dispersion equation of propagation of guided waves in a composite insulator model is determined; 2, a corresponding frequency dispersion curve is obtained through insulator test piece related parameters tested through experiments; 3, stimulation guided wave frequency, periods and modal are determined according to a frequency dispersion curve conclusion; 4, stimulation and receiving points are selected, and defect detection of guided waves is achieved; 5, a guided wave detecting waveform is placed in a computer for data analysis processing, whether the defect exits or not it judged, and the size and type of the defect are judged. The detecting advantages of being accurate, fast, long in distance, large in range, low in cost and the like are achieved.

The invention discloses an infrared accurate temperature measurement-based composite insulator insulation defect detection method. The method comprises the following steps: whether a heating abnormity position exists on a composite insulator or not is determined according to different temperatures represented by different colors in a thermogram, an apparatus is normal if the heating abnormity position does not exist, a difference between the highest temperature of the heating abnormity position and ambient temperature is compared if the heating abnormity position exists, the composite insulation has an insulation defect if the difference is greater than a preset temperature threshold C (C is greater than 1), same kind comparison is carried out if the difference is smaller than the preset temperature threshold C (C is greater than 1), a temperature difference between positions corresponding to a three-phase or same-phase double-string composite insulator in a same tower is compared and analyzed and is a difference between the highest temperature points of corresponding positions in the thermogram of the three-phase or same-phase double-string composite insulator, the apparatus is normal if the temperature difference is smaller than 1K, and on-tower repeated measurement is carried out if the temperature difference is greater than 1K. The method improves the detection efficiency of the composite insulator, and improves the composite insulator insulation defect determination accuracy.

The invention discloses a method for detecting composite insulator interface defects; according to the method, DC voltage leakage current characteristic tests of a composite insulator before and after a water boiling test are performed; power function fitting of the DV voltage and corresponding leakage current data and curves obtained in the measurement is performed; interface defects of the composite insulator are discriminated according to the fitting results; and discrimination determination can be performed by using characteristic coefficient ratios or characteristic index change rates. The method provided by the invention overcomes the disadvantage that withstand voltage tests and steep impulse tests can not sensitively reflect composite insulator interface defects; the method of the invention is simple and effective, and is applicable to the detection of 35-1000 kV AC-DC composite insulator interface defects.

The invention relates to a silicone rubber composite insulator aging degree detection method comprising the steps of: a, sample acquisition, b, sample washing, c, sample detection, and d, sample comparison. The aging degree of the sample is then reflected with spectral peak area variation amount. The method provided by the invention is simple, and has the advantage of convenient operation. Adopted special-purposed equipment is simple and is easy to operate and manufacture.

The invention relates to a composite insulator ageing state comprehensive evaluation method based on multi-characteristic vectors. According to the method, the mathematical theory of fuzzy variable weights is introduced into state evaluation of composite insulators, parameters which comprehensively and accurately reflect the working states of the insulators are separately selected, an improved analytic hierarchy process (IAHP) is adopted, and opinions of an expert group are processed. On the basis of constant weights, data of the insulators is combined, and variable weights of all factors are determined. Before indexes are adopted to conduct state evaluation, all the indexes are subjected to normalization, quantitative data is transformed according to corresponding formulas, a scoring system is adopted for qualitative data, the score ranks from zero to one, the distribution function which combines half trapezoid and triangle is adopted to determine the membership degree, and the influence of all index quality on the insulator state is synthesized by adopting a multilevel fuzzy comprehensive evaluation method. According to the method, related state parameters are organically and comprehensively combined, the accurate and positive evaluation on the state of the insulators in running is made, and the method has the practical value.

The invention relates to a prediction method for the ageing state of a composite insulator.The prediction method includes the steps that a multi-dimensional prediction model, about environment elements (the contamination degree, humidity and ultraviolet intensity) and operation years, of trap parameters (trap charge quantity) is set up, trap charge quantities of multiple samples are tested, equivalent time of each environment element is calculated according to operation environment and operation years of the composite insulator to determine a prediction formula, and the influence factor of the environment elements to ageing of the composite insulator is obtained.The relation between the trap parameters of space charges of a silicone rubber material of the composite insulator and the elements such as the operation time and the operation environment is determined, and the ageing trend of the operating composite insulator along with the operation time in the complex environment elements can be predicted accurately.It can be known by comparing with actual test values that the prediction value error is small and is within 16%, and a good evaluation effect is achieved.