99 results about "Arc energy" patented technology

The invention relates to the technical field of electrical fault positioning, in particular to an urban rail train relay state online monitoring method and system. The specific implementation process comprises the following steps: collecting coil current, contact voltage, load current and environment vibration signals by using an electrical sensor group; when the coil current is subjected to step change, intercepting an electromechanical characteristic data set; arc energy and contact resistance fluctuation characteristics are calculated, correlation analysis is carried out in combination with environment vibration signals, and passive fluctuation and active fluctuation are distinguished; and establishing a multi-factor health degree evaluation model, dynamically adjusting the arc energy and the weight coefficient of the contact resistance according to the magnitude of the load current and the vibration intensity, monitoring the health state of the relay in real time, and predicting the residual life. Through multi-dimensional data synchronous acquisition and vibration decoupling, the interference of mechanical vibration on electrical performance monitoring is effectively eliminated, the problem that a dynamic working condition cannot be reproduced in an off-line test is improved, and the accuracy of relay state evaluation and service life prediction is remarkably improved.

The invention relates to a modular intelligent power distribution cabinet safety management method based on the Internet of Things, particularly discloses a modular intelligent power distribution cabinet safety management method based on the Internet of Things, and aims to solve the problems that a traditional power distribution cabinet monitoring system is poor in expansibility, weak in fault recognition capability and rigid in protection strategy. The method comprises the following steps: deploying a modularized sensing unit with a standardized interface to realize plug and play; multi-dimensional data of current, voltage, temperature and arc light are synchronously acquired at a high sampling rate; data are fused on the edge side through Kalman filtering, and key features such as harmonic distortion rate, voltage sag depth, temperature gradient change rate and electric arc energy accumulation value are extracted; performing dynamic risk assessment by using a five-layer deep belief network model, and triggering early warning when the high risk probability exceeds a threshold value; adaptively adjusting an overcurrent protection constant value, opening delay and isolation logic according to an evaluation result; and the edge-cloud coevolution is realized by continuously optimizing the model and the strategy through cloud reinforcement learning.

The invention provides a multi-factor influence static contact ablation loss and degradation evaluation method, which comprises the following steps: acquiring environmental condition parameters according to arc energy transfer distribution, fusing the environmental condition parameters into a simulation process, and determining a material loss initial rate; if the initial material loss rate exceeds a preset threshold value, analyzing the influence of arcing time on energy transfer through a neural network model, and judging an evaporation splashing proportion; carrying out data fusion on a material melting mechanism by adopting the evaporation splashing proportion to obtain an ablation depth quantized value; obtaining a nonlinear feature adjustment coefficient under the influence of multiple factors through the ablation depth quantized value, and determining a contact fault risk level; according to the contact fault risk level, iteratively optimizing the environmental condition variable by adopting finite element simulation to obtain a material loss accumulation curve; and if the material loss accumulation curve displays an acceleration trend, predicting the residual arcing time bearing capacity through a neural network, and judging the end point of life.

The invention relates to the technical field of life prediction, in particular to a high-voltage switch cabinet contact life management system based on digital twinning, which comprises a thermal behavior acquisition module, a conductive state construction module, a thermal loss dynamic evaluation module, a thermal disturbance response regulation and control module and a life mapping driving module. According to the method, temperature difference and time interval in an on-off period are collected, thermal stress change is calculated in combination with current density, thermal characteristics of materials are correlated, thermal behaviors of a contact are dynamically reflected, a conductive path boundary is reconstructed based on contact area and pressure offset, a through-flow state is accurately described, and heat accumulation and arc energy input are extracted. The method comprises the steps of analyzing a temperature trend under thermal diffusion lag, constructing a heat loss evolution curve, adjusting thermal conductivity distribution through a ratio of temperature rise to mass migration rate, improving local adaptability of thermal disturbance response, generating a life attenuation layer in combination with equivalent thermal mechanical load and fatigue tolerance, and enhancing dynamic nature and precision of evaluation. And accurate judgment and management of the degradation area are realized.

The invention discloses an outdoor high-voltage alternating-current drop-out fuse, and relates to the technical field of fuses. The breaking auxiliary mechanism is connected in series in a circuit of the lower wiring terminal and the fusion tube assembly, when a short-circuit fault occurs, the coil generates a strong magnetic field due to instant passing of ultra-large current, the elastic force of the second spring can be overcome to push the iron core to move, and the arc-shaped push plate is driven to quickly push the fusion tube assembly to move away from the insulator; compared with a breaking mode of a traditional drop-out fuse which only depends on gravity drop of a fuse tube after a fuse wire is fused, the mode has the advantages that the breaking process is actively accelerated, the separation time of the upper contact and the conductive pressing plate is greatly shortened, the duration of an electric arc is shortened, and through the arrangement of the spacing adjusting assembly, the electric arc can be rapidly separated from the conductive pressing plate. Each section of small arc is further lengthened, arc energy is greatly weakened, segmented and lengthened progressive arc extinguishing is achieved, and the arc extinguishing speed is far better than that of a traditional design of a fixed-interval arc extinguishing plate.

The invention belongs to the technical field of aerospace structural part welding and manufacturing, and particularly relates to a laser-electric arc hybrid welding method for a high-strength aluminum alloy cabin section. According to the method, a high stress concentration area and a deformation risk area are identified through pre-welding modeling and heat-force coupling simulation, then the laser and electric arc energy ratio is dynamically matched based on a heat input cooperation coefficient eta, and the welding speed and the laser defocusing amount are regulated and controlled in real time in combination with a weld joint forming stability index sigma calculated through a pre-trained LSTM model. And performing fusion depth compensation on the special area through the dynamic arc compensation factor phi, and finally optimizing the performance of the joint through postweld heat treatment. The method can adaptively cope with complex working conditions such as plate thickness fluctuation and track curvature change, defects such as air holes and hot cracks are effectively restrained, the internal defect rate of a welding seam is lower than 0.5%, the tensile strength of a welding joint reaches 90% or above of that of a base material, the method is adaptive to 2-series and 7-series high-strength aluminum alloy and complex welding seam tracks, and the welding quality is improved. And the harsh requirements of high reliability and long service life of aerospace structural parts are met.

The application discloses an arc-extinguishing chamber assembly, which comprises a piston rod, a cylinder body and a piston seat. The outer circumferential surface of the piston rod, the inner wall of the cylinder body and the end surface of the piston seat form a compression cavity. The outer circumferential wall of the piston rod and the inner wall of the piston seat form an expansion cavity which is communicated with a nozzle. The piston seat is provided with a compression hole which is communicated between the expansion cavity and the compression cavity. The compression hole is provided with a one-way compression valve which allows gas to flow from the compression cavity to the expansion cavity. The piston rod is provided with a piston inner cavity which is communicated with the internal gap of a movable arc contact. The side wall of the piston rod is provided with a compensation hole which is communicated between the piston inner cavity and the expansion cavity. The compensation hole is provided with a compensation valve which allows gas to flow from the piston inner cavity to the expansion cavity. The arc-extinguishing chamber assembly can utilize the arc energy generated by the arc contact assembly, so that the operation of the movable mechanism of the circuit breaker is more convenient and labor-saving, and the breaking operation effect of the circuit breaker is optimized. The application further discloses a circuit breaker using the arc-extinguishing chamber assembly.

The invention relates to the technical field of contact materials for high-voltage electrical equipment, and particularly discloses a contact material, a preparation method and a contact state monitoring method. The contact material includes a base material; the surface of the substrate material is combined with a porous HEAs framework, and the porous HEAs framework is provided with through holes perpendicular to the substrate material; the through holes are filled with phase change alloy, and the melting point of the phase change alloy is smaller than or equal to 200 DEG C. An integrated double-layer structure is adopted, a substrate material with excellent static electrical performance is combined with a porous HEAs framework-phase change alloy composite surface layer with dynamic response characteristics and self-adjusting performance, the contact material is endowed with the electric arc energy active dissipation, erosion self-inhibition and surface self-repairing capacity, and through doping modification of rare earth elements, the contact material can be subjected to surface self-repairing, so that the service life of the contact material is prolonged, and the service life of the contact material is prolonged. Consumption monitoring of the contact material in the working state is achieved, and the technical bottleneck that an existing contact material lacks active protection, self-adaptive repairing and state monitoring is solved.

The invention provides a circuit breaker and an uninterruptible power supply. The circuit breaker comprises a first busbar, a second busbar, a main contact and a plurality of arc contacts, the arc contact comprises an arc moving contact and an arc static contact. When the arc moving contact is in contact with the arc static contact, the plurality of arc contacts are connected in series through the conductive piece, the arc contact located at the head end of the plurality of arc contacts connected in series is connected with the first busbar, and the arc contact located at the tail end of the plurality of arc contacts connected in series is connected with the second busbar. When the arc moving contact is in contact with the arc static contact, the multiple arc contacts are connected in series through the conductive pieces, so that the arc contacts can generate multiple sections of series-connected arcs at the breaking moment, the sum of the voltages of the multiple sections of arcs is far higher than the system power supply voltage after the voltages of the multiple sections of arcs are superposed, the arcing duration can be shortened through the high voltage difference, and the fault can be rapidly cut off. Meanwhile, arc energy is dispersed to a plurality of fractures, heat concentration is avoided, and permanent damage to the arc contact and the internal structure of the circuit breaker caused by high-temperature arc ablation can be prevented.

This invention discloses an AC circuit breaker control method and device, relating to the field of circuit breaker control technology. The method includes the following steps: acquiring the target waveform sequence of the target AC circuit and obtaining the fundamental and higher harmonic components through frequency domain decomposition to extract current waveform features; constructing a zero-crossing prediction model based on the current waveform features, and dynamically correcting the prediction model by combining the higher harmonic components and load asymmetry characteristics to generate a candidate interval for the initial breaking time; determining the final breaking time by combining the instantaneous power direction reversal point and the arc sustaining energy threshold; triggering the circuit breaker operation at the final breaking time, and dynamically adjusting the contact separation speed based on the residual arc energy until the arc energy decays to a safe value. This invention solves the problems of arc extension and equipment damage in traditional circuit breakers under harmonic distortion or sudden disturbances by extracting current waveform features to construct a zero-crossing prediction model and dynamically correcting the contact separation strategy.

The invention provides a static contact of an electric switch, which at least comprises a conductive connecting piece, a contact point and a conductive body, the contact point is welded on the conductive body or the conductive connecting piece, the conductive body and the conductive connecting piece are arranged in a split or integrated manner, and the contact point is welded on the conductive body or the conductive connecting piece based on the total volume of the conductive body. The volume ratio of the conductor made of the iron material in the conductor is 30%-100%, or the material of the conductor at least contains more than 30% of the iron material in volume ratio. The invention also provides an electromagnetic release comprising the static contact. The invention relates to a static contact of an electric switch, which is applied to the electric switch, because an electric conductor containing an iron material is arranged in a main loop, part of arc energy is consumed on the iron material when the electric switch is switched off by utilizing the positive temperature coefficient characteristic of the iron material, so that the current limiting coefficient of the electric switch is reduced; the current limiting performance of the electrical switch can be improved.

The invention discloses a muzzle arc energy and mass center spatio-temporal evolution analysis method and system, and relates to the technical field of muzzle arc analysis, and the method comprises the steps: building an electromagnetic track launch muzzle arc simulation experiment platform, and obtaining a muzzle arc image through a high-speed photographing system; an arc contour image is obtained based on a local adaptive threshold segmentation and morphological gradient extraction algorithm, and the integrity and robustness of arc contour extraction are improved; based on a robust centroid tracking algorithm of multi-connected domain energy fusion and time sequence consistency constraint, a final arc centroid is obtained, and stable positioning and tracking of the arc energy centroid in the full evolution stage are achieved; and quantitatively analyzing the time-domain evolution characteristics of the highlighted area of the muzzle arc and the law of the spatial motion trail of the mass center of the highlighted area based on the muzzle arc images at different muzzle speed. An effective means is provided for quantitative characterization of a bore port arc, and an experimental basis and a theoretical reference are provided for optimization of a bore port structure, anti-ablation design, regulation and control of emission working conditions and the like of an electromagnetic emission system.

The invention relates to the technical field of laser material processing, in particular to an attraction type laser and electric arc collaborative welding device. The device comprises a welding platform, a control host, a laser-arc hybrid welding unit with a moving module, a constraint channel unit and an attraction power unit. The restraining channel unit comprises a sealing belt and a sealing retracting and releasing assembly, the sealing retracting and releasing assembly and the laser-arc hybrid welding unit move synchronously, one end of the sealing belt is arranged on the sealing retracting and releasing assembly, and the sealing belt is attached to the butt joint gap between the two workpieces to be welded. The other end of the sealing belt is attached to one end of the butt joint gap and connected with the attraction power unit. By the adoption of the attraction type laser and electric arc collaborative welding device, the problems of low laser and electric arc energy coupling efficiency and poor stability in the laser welding process are solved, and the attraction type laser and electric arc collaborative welding device is suitable for laser welding of metal materials.

The invention discloses a pulse type pantograph net arcing energy detector and a method thereof. The pulse type pantograph net arcing energy detector comprises a measuring circuit, a timing circuit and a frequency division and transmission circuit. The measuring circuit is used for converting a light current signal generated by arcing into a pulse signal of which the frequency is in direct proportion to the size of the light current; the timing circuit is used for starting timing after the pulse signal is interrupted and generating a trigger signal when timing reaches a preset interval threshold value; and the frequency division and transmission circuit is used for receiving the pulse signal output by the measuring circuit and counting, and outputting a count value as arcing energy data when the trigger signal is received. According to the invention, the arcing energy can be detected, another quantifiable index is provided for the arcing intensity, and the characteristics of wide range, low error, quick response and interference resistance are achieved on the measurement effect.

The application discloses a field-circuit coupling-based molded case circuit breaker arc energy dissipation prediction system and relates to the technical field of circuit breaker arc energy prediction.The system comprises a multi-modal data acquisition module, a cross-modal feature fusion module, a prediction model construction module, a working condition self-adaptive adjustment module and a prediction output module.The application realizes accurate prediction of double-break molded case circuit breaker arc energy dissipation through multi-modal data acquisition and cross-modal feature fusion.Synchronous acquisition of multi-dimensional feature data is realized through arrayed optical fiber electric field sensors, miniature Hall sensor arrays, hyperspectral imaging units, infrared thermographs and other equipment, covering the full-space field of the arc-extinguishing chamber, and through dynamic weight distribution and physical correlation degree calculation, data heterogeneity among modes is eliminated, a fusion feature vector is generated, the representation capability of arc dynamic behavior is improved, the error between the prediction value and the actual dissipated energy is low, and the problem of poor working condition adaptability of traditional models is solved.

The application discloses a kind of SF6 circuit breaker fault prediction method and system considering the effect of breaking arc, collect breaking arc data and SF6 gas decomposition product content after breaking, in the process of operation and after fault, establish circuit breaker historical breaking data set, build cumulative arc energy-SF6 gas decomposition product content relationship model, obtain the SF6 gas decomposition product content corresponding to different breaking times, breaking current;Establish SF6 gas decomposition product content historical operation data set;Build SF6 gas decomposition product content prediction model based on LSTM, obtain the prediction result of SF6 gas decomposition product content;Establish SF6 gas decomposition product content historical fault data set, build SF6 circuit breaker fault diagnosis model;The prediction result of SF6 gas decomposition product is as the input of SF6 circuit breaker fault diagnosis model, obtains fault diagnosis result, realizes the fault prediction of SF6 circuit breaker.

The application relates to the field of electric power control and electric vehicles, and discloses a high-reliability active and passive integrated protection device which comprises a first conductor, a first fuse body, a second conductor and a first excitation device which are connected in series; the first fuse body is connected in parallel with a first trigger circuit; in a normal working state of the first fuse body, the first trigger circuit is not conductive with the first excitation device; when the first fuse body is fused, the first fuse body disconnects the circuit, or under the action of arc energy or elastic force, the first trigger circuit can be driven to be conductively connected with a signal receiving end of the first excitation device to send a trigger signal to the first excitation device; and the first excitation device disconnects the first conductor according to the received trigger signal. The first excitation device is used as a backup protection of the first fuse body, and the working reliability of the protection device is improved.

The utility model relates to the antiaging structure technical field of ceramic temperature controller, and disclose an antiaging structure of ceramic temperature controller, including base, the one side fixed connection of base has the antiaging component, the inside fixed connection of base has the damping seal component, the antiaging component includes the fixed connection in the seal pad of base one side, the inboard fixed connection of seal pad has the connecting block, the one side fixed connection of connecting block has silver alloy, the bottom fixed connection of silver alloy has graphite particle dispersion layer, the damping seal component includes the fixed connection in the damping gel of base inside, the top fixed connection of base has the rubber cover, the surface fixed connection of rubber cover has the spring. The antiaging structure of ceramic temperature controller, through the setting of antiaging component, reduced the water vapor permeation to the corrosion of junction and temperature controller internal structure, reduced the ablation of the junction because of arc energy high, improved the stability of product.

The application relates to the technical field of electrical safety, and particularly discloses an arc fault protection method based on a circuit breaker intelligent algorithm, which comprises the following steps: S1, collecting a line current signal in real time, eliminating frequency converter harmonic interference of an original signal through an anti-aliasing filter, and converting the original signal into a digital signal; S2, processing the current signal through a three-stage cascaded wavelet analysis module, and outputting a dynamic peak-to-average ratio to S4; S3, detecting a current disturbance based on a double sliding rail window, outputting a disturbance positioning mark and a time-frequency feature to S4, determining a disturbance event, and positioning a starting point; S4, receiving the dynamic peak-to-average ratio of S2 and the disturbance positioning mark and the time-frequency feature of S3, processing according to a characteristic analysis result, and adopting a direct interruption method and an electromagnetic radiation-current frequency domain cross verification method; and S5, constructing an arc energy accumulation prediction model; the application solves the problems of weak arc missing detection, electromagnetic interference misoperation and delay.

The application relates to the technical field of electric arc processing equipment, and discloses an electric arc energy sensing variable-diameter nozzle regulating device and method, which solves the problem that the diameter of a nozzle cannot be self-adaptively adjusted according to electric arc energy variation, and comprises a conical nozzle body, the end of the conical nozzle body is provided with a front-end horn-shaped nozzle, the front-end horn-shaped nozzle is integrally arranged with the conical nozzle body, the outer side of the front-end horn-shaped nozzle is provided with a regulating mechanism, a driving mechanism is arranged on the regulating mechanism, the regulating mechanism comprises a regulating sleeve located on the outer side of the front-end horn-shaped nozzle, a plurality of inner arc-shaped rods are fixedly connected to the inner side of the front-end horn-shaped nozzle at equal angles, and a connecting column is fixedly connected to the outer side of each inner arc-shaped rod; the front-end horn-shaped nozzle is expanded outward under the action of the force of each reset spring, the diameter is increased, and the diameter of the whole nozzle is conveniently regulated.

This invention relates to the field of intelligent welding simulation and control, and particularly to a method for constructing an AI welding composite energy field model based on a dynamic coupling mechanism. The method includes: firstly, constructing an asymmetric rotating-tilted body laser energy field model, an arc energy field model considering plasma constraints, and a dynamically coupled enhanced energy field model; simultaneously acquiring multimodal sensor data including current and voltage signals and molten pool images; then, using a pre-trained AI deep inversion network, mapping the extracted multimodal feature vectors and process parameters to accurate plasma compressibility factors and synergistic effect coupling coefficients; finally, updating the heat flux density distribution through back substitution and superimposing it to construct the overall composite energy field distribution, which is then input into a multiphysics solver for transient hydrodynamic calculations. This invention achieves the inversion and real-time dynamic coupling of key heat source parameters, improving the simulation optimization efficiency of the composite welding energy field model and the accuracy of weld morphology prediction.

The present application relates to the technical field of welding process, disclose a kind of laser electric arc composite welding weld penetration control method and system, the method includes: based on the infrared thermal radiation signal of welding pool constructs pool three-dimensional temperature field;Based on the specific element spectral line intensity of the plasma optical spectrum signal in the welding pool, the pool metal vapor concentration is calibrated;The pool three-dimensional temperature field and the pool metal vapor concentration are coupled analysis, and the pool state characteristics of the welding pool are obtained;Based on the pool state characteristics dynamic division laser-arc energy distribution ratio;Based on the laser-arc energy distribution ratio, the offset position of laser focal point in weld depth direction is adjusted, and the arc voltage waveform is adjusted by inverter power supply;The present application can improve the efficiency of a kind of laser electric arc composite welding weld penetration control.

This invention discloses a method and system for evaluating the electrical life of high-voltage switches based on the decomposition rate of environmentally friendly gases. The method includes: calculating the rated molar number of environmentally friendly gases in an environmentally friendly mixed gas; conducting an interruption test and calculating the arc energy corresponding to each interruption current; obtaining the percentage reduction in the volume of environmentally friendly gases after the interruption test at each interruption current, and obtaining the molar reduction of environmentally friendly gases corresponding to each interruption current based on the percentage reduction in volume; determining the number of moles of environmentally friendly gases decomposed per unit energy for each interruption current based on the molar reduction and the corresponding arc energy; obtaining the actual arc energy, and determining the amount of environmentally friendly gas decomposed per unit energy for each interruption current based on the actual arc energy and the number of moles of environmentally friendly gases decomposed per unit energy for the corresponding interruption current, and summing them to determine the total amount of environmentally friendly gas decomposed; and evaluating the electrical life of the target high-voltage switch based on the total amount of environmentally friendly gas decomposed and the rated molar number.

This invention relates to the field of physics field calculation technology and discloses a multi-physics field coupling life assessment method for disconnecting switches. The method includes: real-time monitoring and deduction of the transient electromagnetic, thermal, and stress coupling states inside the switch to achieve accurate quantitative assessment of contact losses, aiming to promote efficient resource utilization and green management throughout the entire life cycle of power equipment. The method includes: calculating the rate of change of current based on transient current at adjacent sampling times; solving for local volumetric heat source density and radial temperature gradient by combining material properties; quantifying structural stress and frequency shift using thermoelastic theory; correcting the dynamic separation speed of the contacts through coupled electromagnetic repulsion; and finally calculating the vaporization and ablation loss volume based on the micro-arc energy density. This invention effectively improves the scientific nature of disconnecting switch maintenance decisions, reduces resource waste caused by premature maintenance, supports low-carbon energy conservation and green production in power systems, and achieves accurate life extension and efficient recycling of equipment.

The invention relates to the technical field of electrical system energy efficiency evaluation, in particular to a chemical enterprise energy efficiency evaluation method and system. According to the method, a residual current energy efficiency loss model and an arc energy efficiency loss model are established through least square fitting based on historical data of typical working conditions of chemical enterprises; based on the residual current energy efficiency loss model and the arc energy efficiency loss model, obtaining the weight of each index in the index layer; constructing a judgment matrix based on the weight ratio of different indexes in the index layer; judging whether the judgment matrix meets the consistency requirement or not according to the satisfaction consistency proportion corresponding to the judgment matrix, and if not, correcting the judgment matrix; calculating the target weight of each index in the index layer based on the judgment matrix meeting the consistency requirement; and carrying out weighted summation on the value of each index in the index layer and the target weight thereof to obtain a chemical enterprise energy efficiency comprehensive score. The method can effectively improve the energy efficiency evaluation precision of the chemical enterprise.

The invention discloses a transformer bushing explosion-proof method and system. The anti-explosion method for the transformer bushing comprises the following steps: acquiring data of internal oil pressure, hydrogen dissolved quantity and discharge energy of the transformer bushing; data of internal oil pressure, hydrogen dissolved amount and discharge energy of the transformer bushing are compared with corresponding preset thresholds; and when at least two data of the internal oil pressure, the hydrogen dissolved amount and the discharge energy are greater than or equal to the corresponding preset threshold values, controlling a circuit breaker corresponding to the transformer bushing to be disconnected so as to stop supplying the fault arc energy to the transformer bushing. According to the anti-explosion method and system for the transformer bushing, anti-explosion monitoring on the transformer bushing is realized.

This invention discloses an equivalent simulation method for determining the pressure distribution of an oil-immersed current transformer's oil conservator, comprising: preparing an experimental enclosure that can accommodate the oil-immersed current transformer; fixing the oil-immersed current transformer at the center of the experimental enclosure; establishing a coordinate system for the position of the oil-immersed current transformer within the experimental enclosure; determining a fault point coordinate and a determined pressure distribution coordinate on the oil conservator enclosure of the oil-immersed current transformer; setting a pressure sensor at the determined pressure distribution coordinate point; placing the arc generator head of a short-circuit impulse generator at the determined fault point coordinate; filling the experimental enclosure with insulating oil; adjusting the magnitude of the arc energy released by the short-circuit impulse generator; obtaining the pressure signal corresponding to the arc energy magnitude from the pressure sensor; and calculating the actual pressure values ​​borne by the oil conservator enclosure of the current transformer at the pressure distribution points corresponding to different energy magnitudes.

A circuit breaker arc extinguishing device, it includes arc extinguishing grid piece group (1), arc extinguishing support (2), arc insulation cover (3) and arc leading piece (4), both ends of the arc extinguishing grid piece group (1) are installed on the arc extinguishing support (2), the foot of the arc extinguishing grid piece group (1) is installed in the arc insulation cover (3), and the arc leading piece (4) is installed at the top end of the arc insulation cover (3) and located at the top of the arc extinguishing grid piece group (1), characterized by: the arc insulation cover (3) is provided with a plurality of concave-convex grooves (301) on the inner side wall of the foot of the arc extinguishing grid piece group (1). The circuit breaker arc extinguishing device provided by the application can more effectively utilize the arc energy input into the arc extinguishing chamber under the premise of using the same volume size gas production cover by setting the wave groove on the inner side of the gas production cover, improves the gas production effect, and the wave groove is set between the two arc extinguishing grid pieces to provide a runway for the arc, which is beneficial to the arc entering the arc extinguishing chamber.

The invention relates to the technical field of sheet metal welding, and provides a sheet metal welding process weld joint quality monitoring method and system.The method comprises the steps that according to a thermal expansion coefficient, a welding temperature field and the actual weld joint length, the weld joint deformation amount used for quantifying weld joint linear shrinkage caused by the thermal expansion effect is obtained; acquiring an environment correction factor according to the real-time environment temperature and the real-time environment humidity; according to the welding arc energy, the environment correction factor and the metal plate heat dissipating capacity, metal plate welding net energy used for quantifying effective deposition energy in the welding process is obtained; acquiring a gas flow interference index according to the gas flow rate; and the weld defect probability is obtained according to the welding temperature field, the weld deformation, the metal plate welding net energy and the airflow interference index, and the weld forming quality is monitored according to the weld defect probability. The welding seam defect probability is obtained by fusing metal plate characteristics, environmental attenuation and material nonlinear heat dissipation factors, and the welding seam forming quality monitoring accuracy can be improved.

The invention belongs to the technical field of welding processes, and particularly relates to a hot wire pulse welding method and a welding gun. Compared with the prior art, according to the embodiment of the invention, the inertia of purely adjusting electric parameters is jumped out, preheating energy independent of a welding loop is introduced to serve as a newly-added control dimension, melting energy and arc maintaining energy are decoupled, the matching relation between pulse energy and time is reversely reconstructed through triple cooperation of hot wire peak value reduction, high-frequency complementary spacing and low-base-value heat control input, and therefore the welding precision is improved. Therefore, on the premise that the deposition rate is not sacrificed, low heat input and high-frequency stable transition are achieved at the same time.