2057 results about "Electric spark" patented technology

The invention relates to the technical field of image processing, and discloses a wire cutting machine cutting path intelligent planning method and system based on image processing. The method comprises the following steps: performing multi-angle image acquisition and preprocessing on a to-be-processed workpiece to obtain a workpiece feature map; inputting the workpiece feature map into a sensing area identification network for processing to obtain a target processing area identification map; performing feature enhancement on the target processing area identification image to obtain an enhanced feature image and an importance weight image; cutting path planning is carried out according to the enhanced feature map and the importance weight map, and an initial cutting path is obtained; and performing multi-objective optimization on the initial cutting path to obtain a target cutting path and a corresponding electric spark parameter configuration table. According to the method, collaborative optimization of the cutting path and the electric spark parameters is achieved, the contradiction among the machining precision, the machining time and the energy consumption is balanced, and the system can achieve the optimal process matching on workpieces made of different materials and with different geometric complexities.

The present invention relates to the technical field of electric spark discharge machining, and discloses an electrode structure, an electric spark machining device and a machining method, wherein the electrode structure includes a connecting member, whose axis is a first axis, and one end of the connecting member has a mounting portion; the electrode is hinged to the mounting portion through a hinge shaft, and the axis of the hinge shaft is a second axis; one end of the biasing member abuts against the connecting member, and the other end abuts against the electrode, applying a biasing force to the electrode tending to remain in the mounting portion; the connecting member can be driven to rotate around the first axis, and the electrode deflects out of the mounting portion and rotates around the second axis when the connecting member rotates. This allows the electrode to extend into a guide hole machined on a workpiece when the connecting member is not rotating, and to deflect out of the mounting portion to machine a rotating inner cavity or inner hole when the connecting member rotates to generate centrifugal force, thereby solving the problem that the electric spark equipment in the prior art cannot machine a rotating inner cavity or inner hole whose inner cavity diameter is larger than the orifice.

The invention discloses a dust treatment device for emery production, and relates to the technical field of emery production, the dust treatment device comprises a dust absorption mechanism and a dust absorption pipe mounted on one side of the dust absorption mechanism, a dust treatment mechanism is arranged on one side of the dust absorption mechanism, and a filter box is arranged on one side of the dust treatment mechanism; the dust absorbing mechanism comprises a dust absorbing sleeve, a first rotating shaft is arranged in the center of the interior of the dust absorbing sleeve, a dispersing rotating disc is fixedly installed on one side of the first rotating shaft and rotationally connected with the dust absorbing sleeve, and a plurality of dispersing spiral plates are fixedly installed on the outer side of the first rotating shaft; due to the fact that a certain amount of water is contained in the anti-static spray, the preliminary dust falling effect can be achieved, meanwhile, the anti-static effect can be achieved, and the phenomenon that due to the fact that the concentration of sucked dust is too high, dust suction pipes are mostly made of metal materials, certain electrostatic sparks are generated and make contact with aluminum oxide dust, and then explosion is generated is avoided.

Provided are a system and a method for detecting fire event in underground utility tunnels based on acoustics. The system is for early detection of fire situations in an underground facility based on sound. The system includes a sound acquisition device that is installed in the underground facility and collects acoustic signals in real time, and a fire situation early detection server that predicts occurrence of electric sparks and infers a fire risk based on the acoustic signal collected by the sound acquisition device.

The invention provides a double-curved-surface hole wall rotational flow umbrella oil nozzle for low-carbon fuel and a machining method, and relates to the technical field of gas turbine fuel injection. The nozzle comprises a needle valve, a needle valve seat, a spraying hole and a rotational flow groove; the needle valve and the needle valve seat form a sealing conical surface, the inner wall face of a spraying hole of the curved-surface rotational flow umbrella spraying nozzle is a double curved surface, the double curved surface and the sealing conical surface form a ruled surface, the rotational flow groove is formed in the inner wall face of the spraying hole, and the direction of the rotational flow groove is the generatrix of the ruled surface. The inner wall face of the spraying hole is designed to be the curved face, fuel is better guided to flow in the oil nozzle, the area of a low-pressure area is reduced due to sudden change of the direction in the fuel flowing process, and therefore cavitation is restrained from occurring and developing, and the phenomena that the spraying hole is blocked and mist spraying is unstable due to cavitation are improved; the rotational flow grooves in the curved surface can be achieved through the electric spark machining technology, the machining difficulty is reduced, meanwhile, the turbulent kinetic energy and the radial momentum of fuel can be effectively improved, spray distribution is more uniform, and the atomization quality is improved.

The invention relates to the technical field of data signal processing, in particular to a distribution box electric spark monitoring method which has the advantages of not depending on optical imaging conditions, adapting to complex environments and being capable of effectively distinguishing difference between mechanical vibration and discharge signals. According to the invention, non-intrusive monitoring of electric sparks in the distribution box can be realized, and the limitation of a traditional visual method in a closed space is overcome. And the fusion of the multi-dimensional acoustic features improves the recognition accuracy and reduces the false alarm rate. The introduction of environmental parameters enables the system to adapt to different working conditions, and improves the robustness of monitoring. The method does not need to reform the structure of the distribution box, can be widely applied to state monitoring of various low-voltage distribution equipment, and effectively prevents equipment faults and safety accidents caused by electric sparks.

The invention discloses a data processing method and system for a precise automatic multi-axis numerical control electric spark forming machine, and the method comprises the steps: mapping preprocessed data into a digital twin model for fusion analysis, and extracting fusion features including instantaneous energy density, an effective machining angle, a thermal error compensation amount and a chip removal efficiency evaluation value; based on the fused feature data, performing real-time state evaluation and future discharge trend prediction by using a LightGBM neural network model, and outputting a processing prediction result; and a multi-target optimization function is established, an improved NSGA-II algorithm is utilized to carry out rapid optimization search by taking the current processing parameters as an initial population, a multi-axis cooperative motion instruction is generated, and the multi-axis cooperative motion instruction is transmitted to a multi-axis motion control module and a pulse power supply module to be executed. And the processing stability and reliability are improved.

The invention discloses a method for electric spark machining of a high-carbon high-chromium molybdenum alloy steel chute, a first group of electrodes is adopted to machine the chute to be machined, the first group of electrodes comprises a first electrode, a second electrode and a third electrode, when the first group of electrodes is adopted to machine each chute, the first electrode is firstly used for rough machining, and then the second electrode is used for machining; carrying out semi-finish machining by using a second electrode, and finally carrying out finish machining by using a third electrode; after a plurality of skewed slots are machined, after a first electrode in a first group of electrodes is abraded, a second group of electrodes is adopted to machine the skewed slots to be machined, the second group of electrodes comprises a second electrode, a third electrode and a fourth electrode, when the second group of electrodes is adopted to machine each skewed slot, the second electrode is firstly used for rough machining, and then the third electrode is used for semi-finish machining; and finally, finish machining is conducted through a fourth electrode. And in this way, after the (n-3) th electrode in the (n-3) th group of electrodes is abraded, the (n-2) th group of electrodes is adopted to machine the chute to be machined, the (n-2) th group of electrodes comprises the (n-2) th electrode, the (n-1) th electrode and the nth electrode, when the (n-2) th group of electrodes is adopted to machine each chute, the (n-2) th electrode is firstly used for rough machining, and then the (n-1) th electrode is used for semi-finish machining, and finally, finish machining is conducted through the nth electrode. The invention aims to improve the processing efficiency and reduce the production cost while ensuring the processing quality.

The utility model relates to the technical field of electric spark cutting machines, and discloses an electric spark numerical control cutting machine alignment device which comprises a working table and a cutting machine body right facing the working table, an adjusting assembly driving the cutting machine body to ascend and descend is installed on the working table, first supporting frames parallel to each other are fixed to the two sides of the working table, and the first supporting frames are fixed to the working table. A second supporting frame and a third supporting frame which are perpendicular to the first supporting frames are fixed between the first supporting frames on the two sides, the second supporting frame and the third supporting frame are parallel to each other, a horizontal lead screw is rotationally connected to the second supporting frame, the two ends of the horizontal lead screw are in threaded connection with clamping seats, opposite threads are arranged at the two ends of the horizontal lead screw, and the clamping seats are in threaded connection with the clamping seats. Clamping plates are fixed to the adjacent sides of the clamping seats on the two sides, and pressing mechanisms are fixed to the clamping seats on the two sides and the middle of the third supporting frame. The fixture has the following advantages and effects that a workpiece can be conveniently and automatically positioned and aligned, meanwhile, the workpiece is rapidly pressed and fixed, and the machining efficiency is improved.

The invention relates to the technical field of power distribution, in particular to an electric energy metering box for power distribution equipment, which comprises a box body, a box door, a mounting plate, a partition plate, a lead screw motor and the like, the box door is hinged to the front side of the box body, the mounting plate and the partition plate are connected in the box body, ventilation openings are formed in the left side and the right side of the box body, and the lead screw motor is mounted on the box body. A lead screw of the lead screw motor is rotationally connected with the bottom of the box. Electric appliance elements and an electric energy meter in the box body can be shot through the visual camera, numerical values on the electric energy meter can be read, the numerical values are recorded in the controller, if the visual camera shoots electric sparks, it is indicated that a fire risk exists in the box body, and the controller can control a second electromagnetic valve to be opened; inert gas in the gas compression tank enters the box body through the gas outlet pipe to dilute the oxygen concentration in the box body, so that fire cannot occur in the box body.

The invention discloses a high-strength composite pipe manufacturing method, and relates to the technical field of composite pipe production, and the method comprises the following steps: S1, inner ring welding: arranging and guiding inner ring reinforcing warps through a front end winding welding seat, and welding inner ring spiral wefts to the outer sides of the inner ring reinforcing warps through electric sparks, s2, mesh belt winding: wrapping a middle-layer steel wire mesh belt on the outer side of an inner-ring spiral weft through a middle-layer mesh belt winding welding seat, welding the middle-layer steel wire mesh belt on the outer side of the inner-ring spiral weft through electric sparks, and winding the middle-layer steel wire mesh belt on the outer side of the inner-ring spiral weft through a middle-layer steel wire mesh belt winding welding seat; the operation stability of production equipment is improved, the convenience of replacement and adjustment of the mesh belt storage roller is effectively improved, a mesh framework is formed by continuous online welding of warp-direction steel wires and inner and outer weft-direction steel wires, and the mesh framework and steel-plastic formed by one-time co-extrusion composite molding of polyethylene plastic penetrate through each other in a three-dimensional mode and are embedded with each other to jointly bear the working load.

Fixing seats are symmetrically arranged at the outer ends of the two sides of an oil storage cooling and heat dissipation mechanism, three rams are arranged on the upper surfaces of the two fixing seats through linear guide rails, and the ends, close to the oil storage cooling and heat dissipation mechanism, of the rams are provided with ox heads; the oil storage cooling and heat dissipation mechanism comprises an oil groove, partition plates and baffles, a workbench is arranged in the oil groove, cavities are formed in the side walls of the two sides of the oil groove, the inner wall of the oil groove is open, the partition plates and the baffles are installed on the inner wall of the oil groove, and heat dissipation holes are densely distributed in the upper portion of the oil groove. The tool is reasonable in structure, cooling oil returns to the oil storage tank through the oil return tooth grooves and the oil return openings in the lower portions of the oil grooves, heat generated when six ox heads are machined at the same time enters the cavities in the two sides of the oil grooves through the heat dissipation holes and is exhausted through the exhaust connectors, the heat generated when the ox heads are machined in the oil grooves is greatly reduced, and machining efficiency is improved. Therefore, the safety and the service life of the cow head are ensured.

The invention belongs to the technical field of special maintenance of reactor bodies, and particularly relates to an electric spark machining head for cutting a sleeve flange in a narrow space. Comprising an expansion mechanism, a fine adjustment jacking mechanism, a rotating mechanism, an electrode and a radial servo feeding mechanism, the rotating mechanism provides rotary motion of the electrode and drives the electrode to conduct rotary machining, the radial servo feeding mechanism provides radial feeding motion of the electrode, and the expansion mechanism plays a role in fixing and positioning. The fine adjustment jacking mechanism drives the rotating mechanism, and the radial servo feeding mechanism drives the electrode to do up-down, rotating and radial feeding movement. The method has the beneficial effects that the damage to the pressure-bearing boundary of the primary loop of the nuclear power unit can be avoided under the condition that the heat sleeve is worn out of limits and needs to be replaced aiming at the common problem of wear settlement of the heat sleeve of the control rod driving mechanism of the nuclear power unit, and the whole dismantling work has relatively high safety, reliability and economical efficiency; and greater benefits can be created for the operation of a power plant.

The invention discloses an electric spark nondestructive testing evaluation method for the integrity of a waterproof layer of a cable trench, and belongs to the technical field of nondestructive testing, and the method comprises the following steps: applying a multi-frequency electric signal through a preset moving electrode; the initial contact pressure of the moving electrode and the surface of the waterproof layer is obtained in real time, the pressure of the contact position of the moving electrode is adjusted, an electric spark signal generated at the defect position of the cable trench waterproof layer by a multi-frequency electric signal applied by the moving electrode is captured, and characteristic parameters of the electric spark signal are extracted to generate current electric spark characteristic data; utilizing the current electric spark characteristic data to distinguish defect types so as to generate a defect evaluation result; and outputting defect distribution information and triggering an acousto-optic alarm according to a defect evaluation result. According to the method, a detection mode of combining multi-frequency electric signal excitation and electric spark signal feature extraction and analysis is adopted, waterproof layer defect types can be distinguished, the severity of the waterproof layer defects can be evaluated, and the detection accuracy is improved.

A method for preparing a profiled microchannel plate heat exchanger, and belongs to the technical field of heat exchange. The method based on a combination of a plurality of methods formed by selective laser melting and micro electrical discharge machining can realize a profiled microchannel plate heat exchanger having large aspect ratio flow channels and closed profile section flow channels.

The invention relates to the technical field of illumination optical fiber manufacturing, in particular to a photoelectric separation safety illumination line, a preparation method thereof and an illumination system. The optical fiber comprises a core layer, a wrapping layer and a protective layer, the wrapping layer is coated on the outer surface of the core layer and adopts a resin coating layer, and the protective layer is arranged on the outer surface of the wrapping layer; the photoelectric separation lighting line which is low in energy consumption, safe, reliable and high in lighting brightness is provided, through the photoelectric separation design, optical fibers are connected to LED lamp beads, optical signals are received, safety and environmental protection are achieved, environmental protection is achieved, no electric spark is generated, no electromagnetic interference is generated, no heat is generated, and therefore the surrounding environment cannot be affected; potential safety hazards are avoided; wireless energy transmission between the power supply module and the light source is realized by adopting a magnetic resonance coupling or electromagnetic induction technology, so that the electric shock risk caused by traditional wire connection is eliminated, and the safety of installation and use is improved.

The utility model provides a flue gas treatment structure of a wire cut electrical discharge machining tool, and belongs to the technical field of waste gas treatment. The flue gas treatment structure of the wire cut electrical discharge machine tool comprises a wire cut electrical discharge machine tool body and a flue gas treatment mechanism, a working plate is mounted at the top of the wire cut electrical discharge machine tool body, a working head is mounted at the bottom of the working plate, a treatment box is arranged on the left side of the wire cut electrical discharge machine tool body, and an air pump is mounted on the right side of the treatment box; by arranging the flue gas treatment mechanism, the flue gas treatment mechanism can move along with the working plate and the working head in the working process of the working plate matched with the working head, flue gas generated in the working process of the working head is sucked, meanwhile, dirt particles in sucked flue gas are subjected to adsorption treatment, and the dirt particles in the sucked flue gas are removed. And the situation that smoke is diffused everywhere and difficult to treat in the working process of the working head is avoided, so that the convenience and comprehensiveness of smoke treatment are improved.

The invention relates to the technical field of pulse state recognition, in particular to an electric spark discharge pulse state recognition and control system and method.The electric spark discharge pulse state recognition and control method comprises the following steps that gap voltage is obtained, and whether the gap voltage is rising edge voltage or not is judged; comparing the gap voltage which is judged to be the rising edge voltage with a preset threshold voltage; when the gap voltage is the same as any one of the preset threshold voltages, a trigger state identifier is set to be 1, and counting is started from a preset value A1; when any one of counting stopping conditions is met, counting is stopped, the state identifier is reset, and the counting value is returned to the preset value A1; calculating delay time between two time points of counting starting and counting stopping; judging the delay time and outputting a judgment result; and performing control according to the judgment result. According to the invention, based on the pulse voltage threshold and the time characteristic, the short-circuit arc pulse and the arc discharge pulse are rapidly and accurately identified.

The invention discloses a household energy storage battery management system, and belongs to the technical field of energy storage batteries, the household energy storage battery management system comprises an energy storage box buried in an underground area, an energy storage end cover and a battery pack assembled with the energy storage box, the bottom of the energy storage box is provided with a ground temperature heat exchange unit, one side of the energy storage box body is provided with a discarding port penetrating through the side wall, and the energy storage end cover is arranged in the energy storage box body. A high-risk battery protection box is arranged on the side wall, located on one side of the discarding opening, of the energy storage box body, a pressure storage mounting base is arranged on one side of the energy storage box body, and the pressure storage mounting base is connected with a force storage push plate through a force storage device. The power storage device is triggered through fusing of a thermosensitive wire, a high-temperature abnormal battery pack can be instantly pushed into the independent high-risk battery protection box, chain reaction is avoided, the fire risk is reduced, the high-risk battery protection box is provided with an electromagnetic control fire extinguishing sand putting system, battery combustion can be rapidly inhibited, secondary damage is reduced, and the safety of the battery is improved. And the magnetic type wiring device is automatically powered off when an abnormal battery is discarded, so that the risk of electric sparks or short circuits is avoided.

The invention discloses a test system and method based on electric spark simulation acoustic detonation waves, and belongs to the technical field of acoustic detonation wave ground simulation tests. The problem that in the prior art, an acoustic explosion model does not simulate the atmospheric turbulence environment is solved. The turbulence generation system is adjusted to add a disturbance source for a flow field to generate plane jet flow, the hot line measurement system is used for measuring turbulence intensity, the electric spark acoustic explosion source system is used for generating N-type wave signals used for representing typical acoustic explosion characteristics, and the acoustic explosion wave measurement system is used for measuring acoustic explosion wave signals and storing measurement data. According to the ground test simulation system and method, the N-type wave of the far-field acoustic detonation, the atmospheric turbulence and the influence between the N-type wave and the atmospheric turbulence can be completed on the ground, the influence of the atmospheric turbulence on the acoustic detonation can be considered, a ground simulation platform is provided for research on the interaction between the acoustic detonation wave and the atmospheric turbulence, and the prediction precision of the far-field acoustic detonation is improved.

The utility model relates to an automatic switch control device, a charging pile and a robot system. The automatic switch control device comprises a pole piece detection circuit which is arranged below positive and negative metal pole pieces of a charging pile, is used for detecting whether to-be-charged equipment is located at the charging pile and enabling a power supply assembly to supply power to the to-be-charged equipment, and comprises a first circuit board and at least one group of detection assemblies, and the detection assemblies are arranged on the first circuit board; and the power supply slow start switch circuit and the power supply slow start on-off circuit are connected with the pole piece detection circuit and are used for conducting a circuit between the power supply assembly and the to-be-charged equipment. According to the charging pile, long-time conduction of the charging pole piece, namely the metal pole piece, in the charging pile can be avoided, and slow conduction of the charging circuit is achieved to avoid generation of instant discharge sparks.

The invention discloses an explosion-proof motor for an underground coal mine, and relates to the technical field of explosion-proof motors, and the explosion-proof motor comprises a housing, the outer wall of the housing is fixedly connected with a plurality of short fins at equal intervals, the inner wall of the housing is fixedly connected with a stator around the circumference, and the inner wall of the center of the housing is rotatably connected with a rotating shaft. Through vertical separation of the flow guide plate and flow guide of concave arc faces on the two sides, the resistance of hot air shunting to the two sides can be reduced, after the hot air enters the ventilation cavity, the heat dissipation area is increased under the flat arrangement of the hot air, and heat on the surface of the ventilation cavity is rapidly guided out through cooperation of the unfolded first fins, the unfolded second fins and the unfolded third fins, so that the heat dissipation efficiency is improved. The temperature exchange rate can be increased through double heat conduction, hot air in the ventilation cavity can be rapidly cooled, airflow and temperature on the two sides can be balanced, the stability of the system is improved, the equipment temperature can be reduced through good heat dissipation, and electric sparks caused by overheating are reduced.

The application discloses a kind of electric spark wire collecting and releasing device and method of convenient automatic wire feeding, belong to spark wire cutting processing technical field, including rack;The top of rack is connected with the adjusting type take-up and pay-off assembly for take-up and pay-off;Adjusting type take-up and pay-off assembly includes take-up and pay-off assembly, adjusting type linkage assembly and translation component, translation component is fixedly connected with rack, adjusting type linkage assembly is connected with take-up and pay-off assembly, adjusting type linkage assembly is fixedly connected with translation component;The end of the winding end of take-up and pay-off assembly is fixedly connected with the elastic compression assembly for cutting wire end fixedly connected;The side of rack close to cutting machine tool is connected with the wire feeding assembly for cutting wire to be sent to elastic compression assembly, and wire feeding assembly is movably connected with elastic compression assembly.The application realizes automatic wire feeding, and it is beneficial to practical use.

The utility model relates to the technical field of electric spark sources, in particular to a portable electric spark source which comprises an input power supply, a central control box, an upper computer and an exciter, and a source system is arranged in the central control box; the seismic source system comprises a voltage detection module, a high-voltage power supply module, an energy storage module and a high-voltage switch module. The input power supply is electrically connected with the high-voltage power supply module, the voltage detection module and the high-voltage switch module respectively; the high-voltage power supply module is electrically connected with the voltage detection module, the upper computer, the energy storage module and the high-voltage switch module, and the high-voltage switch module is electrically connected with the energy storage module and the exciter. According to the portable electric spark source, the high-voltage power supply and the high-voltage switch are integrated, so that the size and the weight of equipment are remarkably reduced, and the portability is improved.

The invention belongs to a non-traditional machining electric spark machining technology in the field of manufacturing, and discloses an electric spark multivariable self-adaptive efficient machining control system. The control system comprises an interelectrode discharge pulse distinguishing module, a gap machining state detection module, a gap environment machining state detection module, a gap voltage control module, a cutter lifting period control module and a pulse interval duration control module. By means of the method, the breakdown strength of spark liquid can be effectively maintained under various machining conditions, the probability of abnormal discharge is reduced, the machining process is stable, the discharge efficiency and the machining efficiency are high, and by establishing a corresponding machining process mathematical model and a control strategy, according to the machining condition of the discharge gap, the machining efficiency is improved. The optimal electric gauge calibration parameter configuration under the current machining condition is obtained, the electric gauge calibration parameters are adaptively changed and controlled in real time, and therefore the stable and efficient machining purpose is achieved.

A self-adaptive high-precision line repairing method comprises the following steps that S1, a detected sample is irradiated through a light source, and a CCD high-resolution camera collects image data to detect defects existing in a line; s2, analyzing the collected defect image data through an image analysis device to obtain a repair path of the nozzle, and calculating an operation parameter of the self-adaptively changed nozzle by using an empirical formula; s3, ablating the target electrode through an electric spark ablating device to prepare nano metal particles; s4, the flow rate of inert gas is adjusted through a carrier gas flow rate control device, and the nano-metal particles are conveyed into a nano-particle printing and sintering device; s5, printing the metal nanoparticles to the line defect position through a dry aerosol printing nozzle, and realizing the complete repair of the line through the movement of the nozzle and the assistance of a movable platform below the substrate; and S6, a pressurizing pump and a heating assembly are started to pressurize and heat the metal nanoparticles on the substrate in the sintering cavity. According to the scheme, the processing efficiency of line repair is improved.

A numerical control wire feeding mechanism for an automatic wire penetrating numerical control wire cut electrical discharge machining tool comprises a base plate, a wire feeding wheel mechanism and a pressing wheel mechanism, the wire feeding wheel mechanism comprises a wire feeding wheel, a wire feeding wheel shaft, a driving gear and a wire feeding wheel driving mechanism, and the pressing wheel mechanism comprises a pressing wheel, a pressing wheel shaft and a driven gear. The mechanism comprises a main swing arm, an auxiliary swing arm, a main rotating swing shaft, an auxiliary rotating swing shaft, a main push pin, an auxiliary push pin, a push-pull block, a push-pull power mechanism and an elastic component. According to the scheme, the wire feeding wheel can be accurately fed to a fixed wire feeding position, the certainty of the wire feeding center position is guaranteed, the pressure of the pressing wheel on the electrode wire during wire feeding can be adjusted through the adjusting screw, and the requirement for automatic wire feeding is met. The defects that in the prior art, the wire feeding position is uncertain, the wire feeding pressure is inconvenient to adjust, the wire feeding wheel and the electrode wire are prone to slipping in the wire feeding process, and wire feeding is unreliable are overcome.

The invention relates to the technical field of charging pile monitoring, and discloses a charging pile spontaneous combustion prevention system based on electric spark monitoring, and the system comprises a charging line monitoring module which is used for monitoring the state of a charging line, and obtaining and storing the monitoring data of the charging line; the analysis control module is used for analyzing the charging line monitoring data, judging whether the charging line needs to be replaced or not according to an analysis result, monitoring the state of the charging line through the charging line monitoring module, and obtaining and storing the charging line monitoring data; charging line monitoring data are analyzed through the analysis control module, the actual line loss coefficient and the real-time abnormal index are obtained, whether the charging line needs to be replaced or not is judged according to the actual line loss coefficient and the real-time abnormal index, and a worker can directly overhaul or replace the charging line according to a result; manual judgment after detection of the charging wire is not needed, so that the processing time is shortened, and the charging pile can be recovered to be used as soon as possible; fire disasters caused by electric sparks due to damage of the charging wire are prevented.

The utility model discloses a rotary plug structure and a converter. The rotary plug structure comprises a shell, pins, a rotary seat, a sliding contact piece, an elastic component and a fixed seat. The rotating seat is rotatably arranged on the shell, the plug pin is arranged on the rotating seat, the sliding contact piece corresponds to the contact end of the plug pin, and the elastic component is always in a compressed state, so that the sliding contact piece can be pushed to be in close contact with the contact end of the plug pin, and normal and stable current transmission can still be kept in the rotating process of the sliding contact piece and the contact end; and the electric contact effect is good, the stability of electric connection is effectively ensured, so that the situation of generating electric sparks is reduced, and the use safety is high. In order to reduce the occupied space, the pins can be designed to be of a turnover structure, and storage is convenient. The converter provided by the utility model comprises the rotary plug structure, so that the plug of the converter has a rotating function, the rotating direction can be adjusted, the converter has stronger adaptability and convenience, and wide popularization and application are facilitated.

The utility model discloses a dust explosion-proof monitoring pre-control device of a cigarette dust-removing pneumatic conveying system, and relates to the technical field of dust explosion prevention of cigarette production equipment. Explosion-proof detection mechanisms such as a temperature sensor, a pressure sensor and an electrostatic spark detector, and control execution mechanisms such as an extinguishing and cooling device, a pressure relief control valve and a pipeline blocking valve device are arranged on the dust removal branch pipe and the main pipe, and are connected with a centralized control device; real-time monitoring and pre-control of temperature, pressure and electrostatic sparks of the cigarette dust in the conveying process are achieved. When abnormal conditions are detected, sound and light alarms can be given out in time, measures such as water spraying cooling, pressure relief and pipeline blocking are taken, dust explosion is effectively prevented and controlled, and the safety of cigarette production equipment and personnel is protected. Meanwhile, by arranging the one-way explosion-proof device, it is ensured that when the dust removal equipment explodes, impact airflow cannot affect an upstream conveying pipeline and equipment, and the safety of the system is further enhanced.