154 results about "Surface charges" patented technology

The invention specifically relates to a multi-parameter state monitoring and fault diagnosis system for an intelligent circuit breaker, and relates to the technical field of state monitoring and fault diagnosis of power equipment. A surface / bulk charge and electroluminescent optical monitoring module; a mechanical-electrical performance correlation analysis module; and a diagnosis evaluation module. According to the invention, the dielectric property micro-change module adopts a low-frequency superposition excitation and partial discharge fingerprint spectrum fusion technology, and can sensitively capture dielectric micro-change of gradual deterioration such as damp and uniform aging; the surface / body charge and electroluminescent module performs mixed optical imaging through a non-contact electrostatic potential array and PMT / APD, and accurately recognizes surface charge accumulation and early electrical tree growth; the mechanical-electrical association module quantifies thermal mechanical stress accumulation and impact vibration influence based on FBG strain monitoring and multi-physics field coupling modeling.

The utility model belongs to the technical field of high-voltage transmission lines and insulation, and particularly relates to a three-post insulator surface charge measurement experiment device in an electrothermal composite field, which comprises an experiment cavity, a microwave heating system, a charge measurement device and a data acquisition system, the experiment chamber comprises a first experiment chamber and a second experiment chamber, the first experiment chamber is provided with a glass window, a microwave heating system is arranged above the glass window, and the three-post insulator is arranged in the second experiment chamber; a central guide rod embedded in the high-voltage guide rod on the outer side of the first experiment cavity penetrates through the first experiment cavity and penetrates through the three-post insulator, a sliding rail is arranged at the bottom of the second experiment cavity, a charge measuring device is connected to the upper portion of the sliding rail in a sliding mode, and the charge measuring device is connected with a data acquisition system. And the microwave heating system has the characteristics of small thermal inertia and easiness in instantaneous control, automatic control is conveniently realized, and the controllability of the heating process is improved.

The application discloses an air insulation structure verification method and device based on surface flashover voltage calculation, a terminal equipment and a storage medium, and belongs to the technical field of voltage testing. The method comprises the following steps: obtaining an original structure parameter set; establishing a three-dimensional model according to the original structure parameter set; performing steady-state simulation on the three-dimensional model to obtain an initial electric field distribution; correcting the initial electric field distribution according to surface roughness to obtain a first corrected electric field distribution; performing transient simulation on the three-dimensional model to obtain a surface charge density distribution; correcting the first corrected electric field distribution according to the surface charge density distribution to obtain a second corrected electric field distribution; accumulating the volume with a second corrected electric field value not less than a preset gas critical ionization field strength to obtain a critical volume; and calculating the surface flashover voltage based on the critical volume, and verifying the original insulation structure according to the surface flashover voltage. Therefore, by implementing the application, the problem of inaccurate surface flashover voltage calculation in the prior art can be solved.

The utility model discloses a modification device for producing inorganic non-metal modified powder with good dispersity. The modification device comprises a semi-finished product bin (1), a first spiral reamer (2), an ion fan (3), a medicament barrel (4), a medicament spraying opening (5), a three-roller modification main machine (6), a cyclone separator (7), a pulse cloth bag collector (8), an induced draft fan (9), a recycled powder bin (10), a second spiral reamer (11), a packaging machine (12) and a material drying room (13). According to the device, the three-roller modification host machine is adopted to finish surface modification, so that the modification effect is good; powder modified by the three-roller modification main machine is less in agglomeration and good in dispersing performance after being separated by the air separator; the ion fan ionizes air to generate a large amount of positive and negative charges, so that charges on the surface of the powder during high-speed friction, collision and shearing can be neutralized, and the static electricity removal treatment of the powder is realized; the device can realize continuous production, and is high in yield and low in energy consumption; and the method conforms to green development, and is energy-saving and environment-friendly.

The invention relates to the technical field of high-voltage direct-current power transmission equipment, and discloses a direct-current composite insulator umbrella cover with a double-gradient structure, a preparation process and a composite insulator, the umbrella cover is of a three-layer composite structure, and the umbrella cover sequentially comprises a high-resistivity inner layer, a high-dielectric middle layer and a micro-conductive outer layer from inside to outside; the volume resistivity of the high-resistivity inner layer is larger than 1 * 10 < 13 > omega.m, and the thickness of the high-resistivity inner layer is 10%-20% of the total thickness of The volume resistivity of the high-dielectric middle layer is 1 * 10 < 10 >-1 * 10 < 12 > omega.m, the relative dielectric constant is 15-25, and the thickness of the high-dielectric middle layer is 60%-80% of the total thickness of the umbrella cover; the volume resistivity of the micro-conductive outer layer is 1 * 10 < 8 >-1 * 10 < 10 > omega.m, the relative dielectric constant is 5-8, and the thickness is 5%-20% of the total thickness of the umbrella cover. The technical problems that an existing epoxy hard composite insulator umbrella cover is uneven in electric field distribution and surface charges are prone to accumulation can be solved, and automatic regulation and control of the electric field in the insulator body and rapid discharge of the surface charges are achieved.

This invention belongs to the field of microbial electrochemistry and single-cell analysis technology, and specifically relates to a femtocoulomb-level single-bacterial surface charge imaging method and its application. This technology is based on electrochemiluminescence microscopy, utilizing the spontaneous enrichment of cationic ECL luminescent molecules by the electrostatic field of the negative charge on the bacterial surface, thereby non-destructively enhancing its ECL signal. By establishing a quantitative relationship between the ECL intensity enhancement ratio and the number of adsorbed molecules, and combining this with COMSOL simulation to determine the thickness of the luminescent layer, it achieves for the first time high-throughput, high spatiotemporal resolution dynamic quantitative measurement of femtocoulomb-level charges on the surface of a single living bacterium. The invented technology has high sensitivity, high resolution, and good biocompatibility, and can be used to reveal bacterial metabolic-charge regulation mechanisms, analyze synergistic electron transport pathways, and screen highly electroactive bacterial subpopulations in situ, providing a key tool for microbial electrochemical research.

The application is specifically a multi-parameter state monitoring and fault diagnosis system for intelligent circuit breaker, and relates to the technical field of power equipment state monitoring and fault diagnosis, comprising: a dielectric property micro-change online monitoring module; a surface / body charge and electroluminescence optical monitoring module; a mechanical-electrical performance correlation analysis module; a diagnosis evaluation module.In the application, the dielectric property micro-change module adopts low-frequency superimposed excitation and partial discharge fingerprint spectrum fusion technology, which can sensitively capture the dielectric micro-change of gradual degradation such as dampness and uniform aging; the surface / body charge and electroluminescence module adopts non-contact electrostatic potential array and PMT / APD hybrid optical imaging, which can accurately identify surface charge accumulation and early growth of electrical treeing; the mechanical-electrical correlation module relies on FBG strain monitoring and multi-physical field coupling modeling, which can quantify the impact of thermal mechanical stress accumulation and impact vibration.

The invention relates to the technical field of medical biological materials, and particularly discloses a composite electret flexible biological electrostatic electret patch and a preparation method thereof.The electrostatic electret patch comprises a backing layer, a medical pressure-sensitive adhesive layer and a functional layer which are sequentially arranged from outside to inside. According to the functional layer, at least one of polylactic acid, polyvinylidene fluoride and a polylactic acid-glycolic acid copolymer is selected as a polymer matrix to be compounded with graphene, a specific process combining ultrasonic dispersion and high-precision 3D printing is adopted, a deep-energy-level charge trap is introduced, the problems of high-conductivity filler agglomeration and surface charge leakage are solved, and the conductivity of the graphene is improved. The surface potential retention rate of the material can reach 60% or above after 900 days, the charge loss rate is not larger than 20% after 8-hour air exposure, and efficient physical electrostatic electret assisted sleep treatment under the drug-free and non-transdermal conditions is achieved.

The application discloses an ionic liquid-metal organic framework composite material and a preparation method and application thereof, and particularly relates to the technical field of air purification membrane materials. The ionic liquid-metal organic framework composite material provided by the application realizes efficient capture of particulate pollutants (PM) in air through the action of surface charges and / or polar functional groups of MOF and the strong electrostatic action of IL with high static potential. The fiber membrane loaded with the ionic liquid-metal organic framework composite material provided by the application can capture pollutants with small particle sizes in air by means of the electrostatic force of the ionic liquid-metal organic framework composite material to attract and polarize the pollutants, so that the capture efficiency of PM and other particles in air can reach more than 98%, and the performance is almost unchanged after 96 hours of use, and the ionic liquid-metal organic framework composite material has excellent long-term durability. 2.5 ​

The application belongs to the technical field of semiconductor testing and relates to a semiconductor epitaxial layer resistivity measuring device and method. The measuring device comprises a sample table for placing a sample to be measured, a pretreatment unit for stabilizing the surface charge of the sample to be measured and a measuring unit for detecting the resistivity of the sample to be measured. The pretreatment unit comprises a second electrode and a first voltage source. The second electrode is connected to the front surface of the sample to be measured. The first voltage source forms a first closed loop with the second electrode and a first electrode on the back surface of the sample to be measured. The first voltage source provides a first voltage to the second electrode. The pretreatment unit provided in the application directly stabilizes the surface charge of the sample to be measured by actively applying an electric field, greatly improves the repeatability of CV measurement, effectively suppresses the flat-band voltage drift phenomenon and thus obtains more real and accurate resistivity values of the sample to be measured.

The invention discloses a novel optoelectronic device capable of being prepared on any substrate, a preparation method and application, and belongs to the technical field of optoelectronic devices, the novel optoelectronic device comprises a conductive layer, a porous insulating spacer layer, a porous transparent conductive layer and a charge transport layer which are sequentially deposited on the upper surface of any substrate; the conductive nanocrystalline in the porous transparent conductive layer is uniformly coated by the charge transport layer; and the porous structures in the porous insulating spacer layer and the porous transparent conductive layer are filled with an optical activity semiconductor material. The device can be integrated on different types of substrate materials; meanwhile, each functional layer can be prepared into a porous structure by adopting wet processes such as silk-screen printing and the like, so that preparation of a large-area device is facilitated; and a composite structure of the porous core-shell charge transport layer with bulk phase conduction and surface charge extraction or injection is utilized to replace a common charge transport material, so that efficient charge extraction or injection with a photoactive material interface can be realized, and efficient transport of carriers in a conductive layer bulk phase can be ensured.

The dynamic electrostatic attaching device comprises a vacuum cavity, a magnetron sputtering evaporation source is arranged in the vacuum cavity, an insulation cooling main roller is arranged above the magnetron sputtering evaporation source, a thin film is led out from an unwinding roller and wound on a winding roller through the insulation cooling main roller, and the winding roller is connected with the magnetron sputtering evaporation source. The insulation cooling main roller is connected to a positive output end / or a negative output end of a controllable bias power supply; and the dynamic charge closed-loop control unit is used for monitoring and dynamically adjusting the charge state on the surface of the thin film in real time. On the basis of realizing large-area and no-damage tight attachment of the film and the cooling roller, the charge quantity on the surface of the film is automatically and accurately maintained in a preset safe working window through real-time monitoring and feedback adjustment, so that the dielectric breakdown risk caused by overhigh charge is synchronously prevented, and the service life of the film is prolonged. And the problems of adhesive force failure and heat dissipation deterioration caused by too low charges are solved.

The invention discloses a numerical simulation method, device, equipment and medium for surface charges of an epoxy core in a direct-current gas insulation sleeve, and relates to the field of electrical equipment insulation design, and the method comprises the steps: determining a conductivity tensor based on a pre-prepared epoxy core sample; constructing a target geometric model of the direct-current gas insulation sleeve based on the geometric parameters and the working environment information of the direct-current gas insulation sleeve and the parameter information of the aluminum foil in the epoxy core body; based on the conductivity tensor and the physical process of charge accumulation on the surface of the epoxy core body, constructing an electric-thermal-wet multi-physical field coupled target simulation model; and performing grid encryption processing on the target geometric model, and based on the processed model, a preset finite element solver and the target simulation model, determining a surface charge numerical simulation result so as to utilize the simulation result to complete insulating sleeve design operation. According to the invention, the charge accumulation rule on the surface of the epoxy core body in the direct-current gas insulation sleeve under different working conditions can be accurately output, and the operation reliability of related equipment is improved.

According to the preparation method, cerium hydroxide with positive charges and without charge treatment on the surface is subjected to ultrasonic oscillation, so that a polymer or monomer containing negative charges and cerium hydroxide particles form coordinate bonds, first layer coating on the surface is realized, and surface charges are reversed into negative charges. Coating for the second time, adding a polymer with weak positive charges, polymerizing ion pairs through charge attraction, realizing secondary charge reversal and changing into positive charges. The invention discloses a method for repeatedly coating the surface of a cerium hydroxide particle, the electrical property of the coated cerium hydroxide particle is not changed, and the defect, namely particle adhesion, generated by mechanical force in the polishing process can be greatly reduced, so that the yield of a product is improved.

A pharmaceutical composition for targeted radionuclide therapy comprising a plurality of nanostructures. Each respective nanostructure may comprise a hydrophilic inner cavity and an outer shell of PEG. The hydrophilic inner cavity may comprise a colloidal solution of Lu-177 DOTATAE and a plurality of high-atomic-number nanoparticles selected from a group consisting of gold nanoparticles, platinum nanoparticles and tantalum nanoparticles with a maximum diameter of 1 to 20 nm in a aqueous medium with a ratio (Lu-177 DOTATE: the plurality of high- atomic-number nanoparticles) of 1: 50-60. The outer shell of PEG may have a surface charge between -0.1 and -0.3 mV. The plurality of high-atomic-number nanoparticles may have a diameter of 20 nm. Each respective nanostructure may have a diameter between 50 and 200 nm. Each respective nanostructure may have a diameter of 150 nm. The aqueous medium may be selected from a group consisting water and acetone.

The application provides application of a carbon-silicon composite component chiral heterojunction membrane in chiral molecule / ion sieving, and belongs to the technical field of membrane science and technology.The application has the following characteristics: the carbon-silicon composite component chiral heterojunction membrane is used to selectively recognize and sieve chiral molecules or ions by using the concentration difference driving force, and the carbon-silicon composite component chiral heterojunction membrane is composed of a macroporous anodic aluminum oxide array and a chiral mesoporous carbon-silicon composite nanomaterial.Compared with the prior art, the carbon-silicon composite component chiral heterojunction membrane has asymmetric chemical composition, asymmetric pore structure, asymmetric surface charge distribution and enhanced surface electric property, and is used to sieve chiral molecules or ions under the action of a concentration gradient, so that the operation is simple, the sieving effect is good, and the carbon-silicon composite component chiral heterojunction membrane has considerable application prospect in the field of chiral sieving.

The invention provides a photo-thermal coupling self-powered system, and the system comprises a substrate which is used for bearing a whole device structure; the light-heat cooperation unit is arranged on the substrate and generates surface charges under illumination and temperature changes; a friction material for generating an electric charge; the electrodes are arranged at the two ends of the triboelectric material pair and are used for collecting charges; the rectification energy storage circuit is connected with the electrodes and used for rectifying, storing or outputting the collected charges outwards; the light-heat cooperation unit can be used as a triboelectric material or a functional layer, charge transfer coupling is carried out through light-induced polarization and pyroelectric effects under illumination and temperature changes, and coupling collection is carried out on multi-mode energy of light energy, heat energy and mechanical energy. According to the application, the photosensitive-thermal cooperation unit is introduced, illumination and temperature change are converted into surface charge quantity, and the problems that traditional TENG can only depend on single mechanical excitation and the energy source is limited are solved.

The application relates to the technical field of glass substrate static electricity elimination devices, and discloses a static electricity elimination device for glass substrate processing, which comprises a work platform, a cover body and a magnetic field generator. The work platform is provided with a conveying assembly for fixing and transporting glass plates. The cover body is arranged on the work platform and is internally provided with a spray head for spraying water vapor. Magnetic field generators capable of generating magnetic fields are arranged on the two sides of the cover body. The magnetic induction lines of the magnetic fields pass through the glass plates in the cover body. An electron emitter is further arranged inside the cover body and beside the spray head. During work, the magnetic field direction of the magnetic field generator is adjusted after the surface charges of the glass plates are detected. The water vapor generated by the spray head is used for wetting the surface of the glass plates, the surface liquid flow direction is controlled, the charges are moved in the magnetic field, the charges are concentrated under the influence of the Lorentz force, and the accumulated surface charges of the glass plates are neutralized by the electron emitter.

Provided are a tool and a method for processing a semiconductor wafer. A processing method includes supporting a semiconductor wafer continuously along a periphery of the semiconductor wafer with an electrically grounded conductive member; and spinning the semiconductor wafer, wherein surface charges induced during spinning are dissipated by movement of electrons from the semiconductor wafer to the electrically grounded conductive member at the periphery of the semiconductor wafer.

This invention provides a self-supporting graphene-based carbon microsphere anode framework and its preparation method. A chitin microsphere aqueous dispersion is mixed with a metal salt and ammonia, stirred, and filtered. The resulting chitin microspheres doped with metal hydroxide are dispersed in water. A surface charge modifier is added dropwise, and the mixture is stirred again. An aqueous solution of graphene oxide is added and stirred further. After filtration and annealing, graphene-coated metal / nitrogen co-doped carbon microspheres are obtained. These microspheres are then dispersed uniformly in water with a binder and a conductive agent, filtered to form a film, and dried to obtain a metal-doped self-supporting graphene-based carbon microsphere anode framework. This self-supporting graphene-based carbon microsphere lithium anode framework exhibits high specific capacity and excellent electrochemical performance, improving both energy density and electrode cycle stability.

This invention discloses a method for determining the surface charge density of micro / nano particles. The method first uses light scattering technology to determine the critical agglomeration concentration of micro / nano particles at a given electrolyte type and temperature. Then, under this concentration condition, the resultant force of electrostatic repulsion and long-range molecular attraction between particles is calculated, and the particle surface potential under this condition is determined. Finally, the surface charge density of the particles is obtained based on the obtained surface potential. This invention can accurately calculate the surface charge density of micro / nano particles by determining the critical agglomeration concentration using a laser scattering instrument, eliminating the need to separately measure the outer surface area of ​​the particles in a gaseous medium and the number of surface charges in a liquid medium before calculating the surface charge density.

This invention discloses a biomimetic corncob scaffold with piezoelectric, antibacterial, osteogenic, and healing-promoting functions, comprising: extraction of corncob cellulose nanofibers (CNF); preparation of 3D printing ink; 3D printing of a porous scaffold; loading of antimicrobial peptides and BMP-2 onto a GelMA+PAAM composite hydrogel; and composite preparation of the scaffold and hydrogel. Under external stimulation, the scaffold generates a microcurrent / surface charge, directly disrupting bacterial cell membranes; it avoids drug release and resistance issues, employing a physical mechanism of action with a sustainable response. The microcurrent / electric field generated by the piezoelectric effect simulates the bioelectric environment of natural bone, directly stimulating osteoblast proliferation and differentiation, and promoting mineralization; it mimics the natural anisotropic porous structure of the corncob, facilitating nutrient transport and cell migration; the piezoelectric material itself provides both antibacterial and osteogenic functions, achieving synergistic and unified mechanisms; it is suitable for harsh environments, biodegradable, and has flexible activation methods.

The application discloses a kind of controllable doping p-type two-dimensional transistors based on space and preparation method thereof, mainly solve the problem that existing technology is difficult to realize accurate controllable doping.Solution includes: insulating substrate, two-dimensional material channel layer, source electrode and drain electrode located on both ends of two-dimensional material channel layer, gate dielectric layer located on two-dimensional material channel layer and source-drain electrode, gate electrode located on gate dielectric;By depositing a thick mask layer, the mask layer is thinned to form a patterned thin layer by lithography and etching, the two-dimensional material is ion bombarded through the treated mask layer, the two-dimensional material under the mask thin layer forms surface vacancies, then remove the mask, expose the two-dimensional material to oxygen flow to form surface charge transfer doping.The application can realize partition controllable doping without damaging the two-dimensional material and affecting the performance, effectively improve the conductivity of two-dimensional transistor.

The invention discloses a device and method for testing charge distribution and GIL insulator surface flashover characteristics, and the device comprises a closed experiment cavity, an insulator rotating table is disposed in the middle of the interior of the closed experiment cavity, and the insulator rotating table is connected with a rotation control system and controls the vertical movement and rotation movement of the insulator rotating table. The top of the insulator rotating table is provided with a top clamp used for clamping an insulator, the corona pin is fixed to the upper portion in the closed experiment cavity through a three-dimensional fine adjustment support and connected with an external high-voltage power source through a high-voltage terminal, the probe is installed on the inner side of the cavity through a fixed rotating device, and the measuring face of the probe faces the surface of the insulator. The probe is used for scanning and detecting surface potential distribution, and a probe signal is led to the electrostatic potentiometer through a shielding cable and is recorded and processed in real time through an oscilloscope and a data acquisition system. A real electric field environment of a direct current GIL coaxial cylinder structure can be simulated to measure complex curved surface charge distribution, and a mapping model of a charge accumulation state and a surface flashover characteristic is established.

The application discloses a kind of porous titanium doped biochar materials and its preparation process, belong to environmental functional adsorption material technical field.The forestry waste pine cone is used as raw material, and the base biochar is obtained by inert atmosphere carbonization, then the titanium source is uniformly loaded on the biochar skeleton, and the titanium modified biochar with stable structure and abundant active sites is prepared by subsection temperature control pyrolysis activation.The characterization results show that the obtained material has anatase titanium dioxide as active crystal phase, with developed microporous structure, high specific surface area and abundant Ti-O active sites, and strong negative surface charge.The preparation process has mild conditions and controllable process, the raw material source is wide, the cost is low, and the modification effect is stable, which provides technical support for the structure regulation and heavy metal pollution repair application of biomass-based functional carbon materials.

The invention discloses a CO2 response-based self-gel-breaking fracturing fluid and a preparation method and application thereof, and belongs to the technical field of oil and gas reservoir fracturing yield increase, the CO2 response-based self-gel-breaking fracturing fluid comprises the following components: a thickening drag reducer, a self-gel-breaking crosslinking factor, CO2, water and a fracturing fluid auxiliary agent, and the self-gel-breaking crosslinking factor is amino modified attapulgite. The amino modified attapulgite is added into the fracturing fluid and can be quickly and uniformly dispersed in water to form a one-dimensional nanoscale rod-like dispersion, and the surface charge of the one-dimensional nanoscale rod-like dispersion has the characteristic of being regulated and controlled by CO2. After the fracturing fluid enters a stratum, CO2 in a fracturing fluid system is absorbed by the stratum, the self-gel-breaking crosslinking factor is recovered to a non-protonated state, and the fracturing fluid automatically breaks gel. The self-gel-breaking fracturing fluid based on CO2 response provided by the invention has the characteristics of simplicity in preparation, environmental protection, low cost, automatic gel breaking, no residue and better sand carrying property, and is an important product for improving the recovery rate of shale oil and gas.

The invention belongs to the technical field of assisted reproduction, and particularly relates to a biological response type memristor for in-vitro embryo monitoring and application of the biological response type memristor. The memristor comprises a substrate, a bottom electrode, a dielectric layer and a top electrode which are sequentially arranged from bottom to top, the dielectric layer is a double-layer functional layer composed of an Nb2O5 thin film and a barium titanate thin film, the barium titanate thin film is located on the upper layer of the bottom electrode, and the Nb2O5 thin film is located on the upper layer of the barium titanate thin film. The memristor realizes response to biological information by monitoring metabolic byproducts and oxidative stress markers in an embryo in-vitro culture solution in real time, realizes operation by inducing redistribution of surface charges of an interface through ion adsorption, and shows a resistance state transformation characteristic. Besides, the system breaks through the limitation of traditional microscope visual evaluation, realizes direct, sensitive and quantitative electric signal reading of the embryo metabolism state and the oxidative stress level, and solves the problem of embryo development potential evaluation caused by the increase of aneuploid rate in old lying-in women and recurrent implantation failure groups.

A wearable triboelectric sensor has a first layer with surface charges at the same polarity and a second layer with both positive and negative surface charges. The two layers are held together by electrostatic forces generated by surface charges of opposite polarity. Electrostatic forces generated by surface charges of the same polarity force the layers away from each other causing gaps between the layers. When the sensor is placed on the skin of a user, bodily movements induce compressive and tensile stresses that force the layers toward and away from each other causing the gaps to close and open. Contact and separation of the two layers in the areas of the gaps induce a triboelectric voltage that can be measured to determine an extent of the bodily movement. Thus, the bodily movement can be accurately detected with a relatively small, inexpensive sensor that does not require an active power source.

The utility model relates to the technical field of laser printers, and discloses a fixing device for a laser printer heating roller surface charging and discharging mechanism, which comprises a fixing support, a second fixing bolt is in threaded connection with the inside of the fixing support, and a charging and discharging assembly is arranged at the rear end of the second fixing bolt. The top of the charging and discharging assembly is provided with a discharging electrode piece, the upper side of the discharging electrode piece is connected with a first heating roller, a third fixing bolt is arranged in the fixing support, the rear end of the third fixing bolt is in threaded connection with a printer body, and a groove is formed in the front side of the printer body. According to the charging and discharging mechanism, the third fixing bolts are used for fixing the fixing supports, the discharging electrode pieces are connected with the first heating roller, the charging and discharging assembly is installed in the groove, the second fixing bolts abut against the charging and discharging assembly, and the problems that the charging and discharging mechanism is tedious in installation and replacement steps, and the cost is high due to the complexity of the assemblies are solved.

The invention belongs to the technical field of vacuum arc extinguish chambers and high-voltage insulation, and discloses a method for constructing dielectric regulation and control and charge dissipation composite coatings on the inner and outer surfaces of a vacuum arc extinguish chamber, which is characterized in that dielectric regulation and control coatings are constructed on the inner and outer surfaces of a metal sealing ring to improve the electric field distribution, and charge dissipation coatings are constructed on the inner and outer surfaces of a ceramic shell to improve the electric field distribution. The surface charge discharge is promoted; the two coatings have a synergistic effect and can effectively relieve electric field concentration and prevent surface charge accumulation, so that the surface insulation performance of the inner surface and the outer surface of the vacuum arc extinguishing chamber is remarkably improved; the dielectric regulation and control coating material adopts one or two of aluminum oxide and magnesium oxide, and is constructed on the inner surface and the outer surface of the metal sealing ring by a plasma spraying method; the charge dissipation coating is prepared on the inner surface and the outer surface of the porcelain shell through a slurry coating and sintering process, and is made of one or two of zinc oxide and chromic oxide; the vacuum arc-extinguishing chamber has the functions of electric field homogenization and charge discharge, the overall voltage withstanding level of the vacuum arc-extinguishing chamber can be remarkably improved, the process is mature, and the vacuum arc-extinguishing chamber can be directly applied to an existing vacuum arc-extinguishing chamber production line.