468 results about "Graphite electrode" patented technology

The invention provides a method for making foam slag in LF (ladle furnace) refining by using a waste graphite electrode, which specifically comprises the following steps: grinding the waste graphite electrode to obtain graphite electrode powder, and adding limestone as a foaming agent in the LF refining. 0-1.25 kg / t of steel limestone is added firstly, and 0.018-0.19 kg / t of steel graphite electrode powder is added every 2 min. Compared with the prior art, by utilizing the characteristics of high carbon content, high conductivity and low sulfur of the graphite electrode, the invention aims to realize submerged arc heating, reduce power consumption and shorten refining time so as to meet the requirement of continuously increasing LF smelting indexes under the high-quality development trend of steelmaking.

The invention discloses a graphite electrode cooling device of a graphitization furnace, the graphitization furnace and a cooling method, and relates to the technical field of graphite electrode cooling, the graphite electrode cooling device of the graphitization furnace comprises a cooling mechanism, the cooling mechanism comprises an adhesion layer and a plate type heat pipe, an adhesion layer is arranged on the surface of the graphite electrode exposed outside the graphitization furnace, the plate type heat pipe is arranged on one side, far away from the surface of the graphite electrode, of the adhesion layer, the plate type heat pipe comprises a sealing shell, a medium cavity is formed in the sealing shell, a capillary core layer is arranged on the inner wall of the medium cavity, and a cooling medium is stored in the medium cavity; according to the graphite electrode cooling device of the graphitization furnace, the plate type heat pipe is attached to the surface of the exposed graphite electrode, circulating water cooling is not needed, phase change heat transfer of a cooling medium is utilized, the heat dissipation efficiency is improved, phase change heat transfer is not conducted under the low-temperature condition, and invalid heat exchange is avoided.

The invention relates to the technical field of graphite electrode production, in particular to a roasting device for graphite electrode production and a roasting method.The roasting device comprises a roasting box, a sieve plate and a plurality of rotating rollers, a plurality of connecting plates corresponding to the rotating rollers are horizontally arranged in the roasting box in a sliding mode, the rotating rollers are embedded and rotationally connected to the connecting plates, and a through opening is formed in the roasting box; the end part of the rotating roller penetrates through the through hole and extends to the outer side of the roasting box, and a pair of arc-shaped scraping plates is arranged on the outer side wall of the rotating roller; and the scraping assembly drives a plurality of pairs of arc-shaped scraping plates to synchronously scrape residues on the outer side wall of the rotating roller. Compared with roasting in the prior art, by arranging the sliding assembly, the rotating assembly and other parts, the distance between the rotating rollers can be adjusted, and the graphite electrode roasting device is suitable for graphite electrodes of different thicknesses. The rotating roller can rotate to drive the electrode to roll, so that uniform roasting is ensured. During roasting or after roasting is finished, the scraping assembly can clean residues on the rotating roller.

The invention relates to the technical field of laser processing, in particular to a graphite ultra-micropore femtosecond laser beam splitting array processing device and a heat influence suppression method, the graphite ultra-micropore femtosecond laser beam splitting array processing device comprises a laser micropore processing equipment main body provided with a laser emission head, and the laser micropore processing equipment main body is provided with a heat suppression workbench mechanism and a workpiece air cooling device; the thermal inhibition workbench mechanism comprises a base, a cover plate, a liquid cooling assembly and an air cooling assembly. The air cooling assembly comprises an end plate and a plurality of exhaust fans. By means of the heat suppression workbench mechanism with the liquid cooling assembly and the air cooling assembly, a composite heat conduction path of'contact conduction-liquid cooling circulation-airflow heat dissipation 'is formed, heat of the workpiece is rapidly conducted out, and the heat influence of ultra-micropore machining of the graphite workpiece is suppressed; the annular pipe blows air flow to a machining area through the air exhaust groove, heat of a laser action point is taken away instantly, and the heat influence on the graphite electrode micro hole in the machining process is further reduced.

The invention provides a method for degrading a perfluoroalkyl compound by activating peroxymonosulfate based on a graphite electrode. Comprising the following steps: step 1, pretreatment of a graphite rod electrode: soaking the graphite rod electrode in a sulfuric acid solution to remove surface impurities; step 2, preparing an electrolyte: preparing the electrolyte containing a perfluoroalkyl compound to be degraded, a background supporting electrolyte and peroxymonosulfate (PMS), and fully stirring to ensure uniform distribution; and step 3, inserting the pretreated graphite rod electrode into electrolyte in an electrolytic bath, adjusting current and voltage, and carrying out electrolysis under the condition of solution stirring. According to the method, the feasibility of activating the PMS to degrade the perfluoroalkyl compound by the low-oxygen-evolution-potential electrode is proved for the first time, and the cognitive limitation of the traditional technology is broken through; the prior art generally depends on a high oxygen evolution potential electrode (such as a BDD electrode, and the oxygen evolution potential is larger than 2.0 V / SHE) to activate PMS so as to degrade perfluoroalkyl compounds.

The embodiment of the invention discloses an electrode evaluation method. The method comprises the following steps: acquiring the initial active lithium amount of a to-be-detected symmetric battery; the working electrode and the counter electrode of the symmetrical battery are made of graphite; carrying out charging and discharging process control on the symmetrical battery for multiple times to obtain the residual active lithium amount; based on the initial active lithium amount and the residual active lithium amount, evaluating a graphite electrode of the symmetric battery; in each charging and discharging process, the symmetrical battery is charged and discharged at a relatively high first charging rate and a relatively high first discharging rate, so that lithium removal of the counter electrode and the working electrode is completed, and the symmetrical battery is charged to a second voltage, so that electrolysis of a solid electrolyte interface film of the counter electrode is completed; and discharging the symmetrical battery to a fourth voltage to enable the solid electrolyte interface film of the working electrode to complete electrolysis. According to the invention, the time of each charging and discharging process and the consumption speed of lithium ions are accelerated, so that the evaluation speed of the graphite electrode is accelerated.

The invention belongs to the technical field of cooperative control, and belongs to an ultrahigh-power graphite electrode roasting multi-parameter cooperative control method and system, and the method comprises the steps: collecting full-dimensional operation parameters of a roasting system, carrying out the partition division of a roasting furnace, and collecting the coupling state data of each partition in real time. And identifying different roasting abnormal scenes based on the coupling state data, and constructing process collaborative risk data under different roasting abnormal scenes in combination with the stage of the current roasting process and the aging state of the furnace body. And marking a to-be-adjusted parameter set in the cooperative control strategy according to the process cooperative risk data, and performing adjustment to obtain an optimized cooperative control strategy. According to the balance degree index, performing comprehensive evaluation on each control node in the optimization cooperative control strategy, defining the control nodes which do not pass the evaluation as risk nodes, and generating a risk adjustment strategy pointing to the risk nodes; according to the method, multi-target collaborative optimization can be realized, the production cost is reduced, and the stability and controllability of the roasting process are improved.

The invention discloses a temperature control method and system for a continuous graphitization furnace, the graphitization furnace comprises a furnace body and a pair of graphite electrodes inserted in the furnace body, and the temperature control method comprises the following steps: real-time temperature of a material in the furnace body and instantaneous power of a circuit where the graphite electrodes are located are detected in real time; calculating a temperature change rate based on the real-time temperature, and calculating a power change rate based on the instantaneous power; and the intelligent model configured based on the neural network architecture processes the real-time temperature, the temperature change rate and the power change rate to obtain a first adjustment value used for adjusting the output power of the circuit where the graphite electrode is located. According to the temperature control method for the continuous graphitization furnace, the control strategy based on data driving and the intelligent model can exceed traditional simple feedback control, accurate prediction and active intervention on the temperature of the graphitization furnace are achieved, and therefore complex thermodynamic response caused by the fact that the characteristics of materials in the furnace change along with the temperature is effectively coped with; and the graphitization process is always in the optimal temperature interval.

The present invention relates to dust detection, and in particular to a dust isolation sensor with a self-cleaning function, comprising a box body, which is provided with an air duct, which has an air inlet and an air outlet, a light-emitting component and a photosensitive component, a graphite electrode inserted in the air duct, and the graphite electrode is connected to an electrode of a DC power supply; the air inlet of the suction fan faces the air outlet of the air duct; the box body also comprises a vibration motor, which is installed on the outer wall of the air duct, and the vibration of the vibration motor drives the air duct to vibrate; the box body also comprises an air blowing nozzle, which includes an air inlet and an air blowing port, and the air blowing nozzle faces the inner cavity of the air duct, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air; the box body is connected to a ceramic bracket, which supports the graphite electrode; the part where the ceramic bracket is connected to the graphite electrode is padded with a rubber pad; the dust in the air duct is continuously removed to maintain the stability of the dust sensor during long-term use.

The invention relates to the technical field of mixing and kneading pots, and discloses a negative pressure dust collection graphite electrode raw material mixing and kneading pot, which comprises a driving assembly, the driving assembly comprises a base, the top of the base is fixedly connected with a mixing and kneading pot assembly, and the inner side of the mixing and kneading pot assembly is rotatably connected with two material cleaning assemblies. The top of the mixing and kneading pot assembly is fixedly connected with a pot cover shell, the top of the pot cover shell is sleeved with a connecting pipe, the bottom of the connecting pipe is provided with an oil gathering assembly, the bottom of the oil gathering assembly is fixedly connected with a wind wheel, and the material cleaning assembly cleans paste on the side wall of the mixing and kneading pot assembly. The connecting pipe and the oil gathering assembly are matched to polymerize and liquefy smoke and recycle and reuse the smoke in real time, the side face of the wind wheel is fixedly connected with an arc plate, the arc plate inclines by 45 degrees, the arc plate and the mixing and kneading pot assembly cooperate to promote cleaning of paste, and the problem that the smoke condenses in upper structures such as a pot cover and a vacuumizing pipeline to form hard impurities, so that the smoke cannot be recycled is solved. And the final quality of the electrode is seriously influenced.

The invention discloses a preparation method of a threaded joint of a graphite electrode, which comprises the following steps: material preparation: carrying out mixing kneading, molding, roasting and graphitization treatment on needle coke aggregate and a coal pitch binder to prepare a graphite joint blank; in the mixing and kneading process, graphene nanosheets with the mass percent of 0.5%-5% are added into raw materials to serve as conductive reinforcing phases, dispersion of the raw materials is promoted through the technology of combining ultrasonic dispersion and mechanical stirring, and the graphite material with the volume density larger than or equal to 1.70 g / cm < 3 >, the apparent porosity smaller than or equal to 3% and the axial conductivity larger than or equal to 5 * 10 < 4 > S / m is obtained. Compared with the prior art, the preparation method of the threaded joint of the graphite electrode has the advantages that the threaded joint can adapt to the high-temperature working condition, connection stability is kept, the conductivity is excellent, and the service life is long.

The application belongs to the technical field of graphene material preparation, and particularly relates to a general covalent functionalized graphene (CFG) electrochemical preparation method, which comprises the following steps: (1) under the condition of a light sealing oil seal, graphite electrodes are subjected to electrochemical intercalation treatment by using concentrated sulfuric acid; (2) after the intercalation is completed, light sealing oil is injected into an electrolytic cell while the concentrated sulfuric acid is discharged; (3) in the electrolytic cell, a micro-liquid film reaction zone is constructed by using the density and phase solubility difference of the light sealing oil, the aqueous electrolyte and the heavy sealing oil, and the micro-liquid film reaction zone is contacted with the intercalated graphite electrode to make the intercalated graphite electrode electrochemically oxidized to generate CFG; (4) by controlling the relative intercalated graphite electrode of the micro-liquid film reaction zone to move directionally, the whole intercalated graphite electrode is gradually and completely converted into CFG; (5) the CFG structure after the reaction is placed into a solvent to be mechanically exfoliated to prepare a CFG dispersion liquid, and the CFG powder is obtained after drying treatment.

The utility model discloses a pressing tool for pressing a flexible graphite polar plate, which is characterized in that a first flexible graphite sheet and a second flexible graphite sheet are respectively arranged on a first lower template and a second lower template, and are punched downwards through a punch; the area, corresponding to the ridge forming the flow channel, in the second flexible graphite sheet and the first flexible graphite sheet are pressed into a prefabricated plate through a punching sheet on the punch, the area, corresponding to the ridge forming the flow channel, in the second flexible graphite sheet is removed, and the prefabricated plate is prepared and used for subsequently preparing the flexible graphite polar plate. Therefore, the density consistency of a flow field area of the prepared flexible graphite polar plate is improved, the compactness of a runner ridge is improved so as to eliminate stamping cracks, the mechanical strength of the polar plate is improved, the service life of the polar plate is prolonged, and the performance and the service life of a fuel cell are improved.

The invention relates to the technical field of material surface engineering and metallurgical equipment, in particular to a composite coating for prolonging the service life of a crystallizer copper plate and a plasma spraying preparation method thereof.The composite coating comprises, by mass, 35%-55% of chromium, 20%-55% of nickel, 5%-10% of titanium diboride, 0.1%-0.3% of niobium and the balance chromium carbide and inevitable trace impurity elements. According to the invention, titanium diboride and chromium carbide are used as main hard reinforcing phases, so that the coating shows excellent wear resistance at normal temperature and high temperature; a hollow graphite electrode is adopted in the spraying process, plasma arc is generated, and meanwhile an ablation product (carbon) provides a carbon source for formation of chromium carbide; the titanium powder and the boron powder are subjected to an in-situ reaction in a plasma arc to generate titanium diboride, and the in-situ synthesis technology enables hard phase particles to be fine and uniformly distributed, and forms a firm interface with a metal binding phase, so that the problems of interface pollution and weak combination caused by the addition of the hard phase are avoided.

The utility model relates to the technical field of graphite electrode appearance detection, in particular to a graphite electrode appearance detection sample fixing device, which is characterized in that a graphite electrode is conveyed to a driving mechanism through a conveying mechanism, so that the driving mechanism drives the graphite electrode to rotate, and meanwhile, the appearance of the graphite electrode is detected through a detection mechanism. Then unqualified positions are marked through the marking mechanism, then the detected graphite electrodes are discharged through the conveying mechanism, and meanwhile the other group of undetected graphite electrodes are conveyed to the driving mechanism, so that the practicability of the equipment is improved; comprising a driving mechanism; the device further comprises a conveying mechanism, a detecting mechanism and a marking mechanism, and the conveying mechanism, the detecting mechanism and the marking mechanism are all installed on the driving mechanism. The conveying mechanism is used for conveying the graphite electrode, the driving mechanism is used for rotating the graphite electrode, the detection mechanism is used for detecting the graphite electrode, and the marking mechanism is used for marking unqualified positions.

This invention provides an electrode device having a support for engaging and holding a graphite electrode used in the manufacture of a quartz crucible via arc discharge. The electrode device is characterized in that the outermost surface layer of the support, at the portion adjacent to the graphite electrode when the support is engaged with the graphite electrode, has an anti-fouling film. Thus, an electrode device is provided that can suppress contamination from the support, shorten the lifespan of the graphite electrode, and reduce manufacturing costs.

The utility model discloses a graphite electrode forming cooling water inlet device which comprises a machine frame, a water storage tank fixed in the machine frame, an inner container concentrically sleeved in the water storage tank in the Z-axis direction and an arc-shaped hanging basket welded and fixed at one end in the inner container. A lifting assembly used for driving the upper concentric-square-shaped frame, the inner container and the arc-shaped hanging basket to slide in the Z-axis direction is installed on the outer wall of one side of the machine frame. A plurality of graphite electrode workpieces to be cooled in water in the same batch are placed in the arc-shaped hanging basket, the lifting assembly controls the upper concentric-square-shaped frame, the inner container and the arc-shaped hanging basket to be immersed in the water storage tank, so that the graphite electrode workpieces are cooled, and the lifting assembly drives the arc-shaped hanging basket to move upwards after cooling is completed. And the graphite electrode workpiece in the arc-shaped hanging basket is separated from the cooling liquid.

The invention discloses a method for preparing brown aluminum oxide by smelting chromium-aluminum spinel. The method comprises the following steps: crushing the chromium-aluminum spinel into chromium-aluminum spinel particles; the chromium-aluminum spinel particles and the carbon particles are mixed, and a mixture is obtained; putting the mixture into an electric arc furnace for bottoming and compacting; electrifying and smelting by using a three-phase graphite electrode; after smelting is completed, cooling water is continuously introduced into the electric arc furnace for cooling for a period of time, and then natural cooling is conducted; and disassembling the furnace, cleaning and separating brown aluminum oxide and high-carbon chromium metal, and packaging. According to the method, chromium trioxide in the chromium aluminate spinel is reduced into high-carbon metal chromium by adopting a carbon reduction smelting method, so that most of chromium trioxide is removed, a generated aluminum-containing product meets the impurity-containing requirement of brown aluminum oxide, and the high-carbon metal chromium is conveniently separated from the brown aluminum oxide by utilizing the characteristic that the density of the generated high-carbon metal chromium is greater than that of the brown aluminum oxide; the technological process is greatly simplified, and the production cost is saved.

The invention belongs to the field of electric arc furnaces in the metallurgical industry, and particularly relates to the field of electric arc furnace power supply, in particular to a double-electrode alternating-current electric arc furnace capable of achieving frequency-variable smelting operation. A TV1 high-voltage voltage transformer, an electric arc furnace circuit breaker and a CT1 high-voltage current transformer are connected to an inlet wire bus section; the system further comprises a phase-shifting N transformer and an alternating current-direct current-alternating current converter, a primary side winding of the phase-shifting N transformer is connected with the output end of the electric arc furnace circuit breaker, a secondary side of the phase-shifting N transformer is connected with the input end of the alternating current-direct current-alternating current converter, and a TV2 low-voltage voltage transformer and a CT2 low-voltage current transformer are arranged on the wire outlet side of the output end of the alternating current-direct current-alternating current converter. And the output end of the AC-DC-AC converter is connected with the outlet copper pipe, the flexible water-cooled cable and the copper-steel composite conductive cross arm through a large-current line, so that electric energy is transmitted to the dual-electrode graphite electrode. According to the invention, the smelting charging power is improved, the smelting power consumption is reduced, and the smelting efficiency is improved.

The invention relates to the technical field of vacuum furnace electrode quick connection, in particular to a high-temperature vacuum furnace graphite electrode quick connection structure which comprises a copper bar, a furnace body electrode base, a copper end connecting piece, a graphite end connecting piece and a graphite lock nut. The detachable copper end connecting piece and the graphite end connecting piece are adopted to be connected with the water cooling copper electrode and the graphite special-shaped electrode respectively, the plane where the conductive end A of the copper end connecting piece and the plane where the conductive end B of the graphite end connecting piece are located are machined precisely, sufficient attachment is guaranteed, and the conductive requirement is met. And when the special-shaped electrode in the vacuum furnace is worn and needs to be replaced, the replacement operation can be completed only by quickly disassembling the single end in the vacuum furnace.

The utility model discloses a graphite electrode fixing device of arc furnace, including arc furnace top cover, the top fixedly connected with hollow frame of arc furnace top cover, the top of hollow frame is equipped with the T type hand pole of rotating joint with it, the bottom fixedly connected with driving bevel gear of T type hand pole, the driving bevel gear is engaged with three driven bevel gears, every driven bevel gear all is equipped with clamping mechanism, every graphite electrode body's both sides all are equipped with clamping plate, the opposite end of two clamping plates all are fixedly connected with insulating plate, and the central mechanism is equipped between two clamping plates. The utility model discloses single drive source through bevel gear transmission's mode, can drive multiple clamping components synchronous action simultaneously, simplifies the operation process, ensures the even force of electrode in the installation process, avoids the eccentricity of installation due to the uneven clamping force, improves electrode service life and smelting effect.

The invention relates to the technical field of graphite electrode roasting, and discloses a method for impregnating a graphite electrode through secondary roasting. Through the synergistic effect of an intelligent cooperative temperature control method, a whole-process inert protection system, a waste heat gradient utilization path and clean combustion directional pollution discharge, high-precision stable temperature control of the secondary roasting procedure is achieved, the activation temperature fluctuation of the coke powder is compressed to be within, the activation uniformity of the coke powder and the roasting consistency of the green body are guaranteed, and the quality of the green body is improved. The mechanical strength and the conductivity of the graphite electrode are greatly improved, the oxidation loss rate of a green body is reduced to below 0.08% through a nitrogen gas curtain and a multi-stage oxygen removal design, pollutant degradation is avoided, a protective medium is protected, meanwhile, the waste heat utilization rate is greatly improved, the fuel gas consumption is reduced, and the reuse frequency of coke powder is increased by utilizing the waste heat of one-time roasting; and finally, double improvement of product quality stability and production economy is realized.

The present invention provides a long-term storage gel battery based on an accordion structure and its preparation method. The battery comprises a high-salinity gel electrolyte, a cation-selective gel electrolyte, a low-salinity gel electrolyte, an anion-selective gel electrolyte, a paraffin separator, and graphite electrodes. The combination of these modules reduces the complexities of gel battery preparation and enables the long-term storage of the prepared gel battery.

The invention relates to the technical field of graphite production, in particular to an extrusion forming device for graphite production, which comprises a worktable and a support frame mounted above the worktable, a vertical rod is mounted in the middle of the upper surface of the worktable, and forming cavities are mounted on the outer side of the vertical rod at equal intervals through a regulation and control assembly; an electric push rod is fixed to the middle of the supporting frame in a penetrating mode, a supporting plate is installed at the output end of the electric push rod, and a pressing head and a pushing column are installed below the right side and the rear side of the supporting plate correspondingly. According to the extrusion forming device for graphite production, the vertical rods drive the four sets of forming cavities installed on the outer side at equal intervals to rotate, meanwhile, the supporting plates drive the pressing heads and the material pushing columns to move downwards together, and therefore the pressing heads conduct extrusion forming on paste in the corresponding forming cavities under the pressing heads; and the formed graphite electrode biscuit in the corresponding forming cavity under the pushing column is pushed out and demolded by the pushing column, so that the continuous batch extrusion forming efficiency of the graphite electrode can be improved.

The present application relates to the field of graphite preparation, a preparation process of large-size graphitized furnace head conductive electrode, comprising: mixing, mixing and kneading, vibration forming, baking furnace baking to obtain electrode blank, using series connection type graphitization furnace for graphitization, starting power 2415kW, rising to 2938kW for 6.5 hours, falling to 2455kW for 3 hours, rising to 5306kW for 40 hours, rising to 6595kW for 6.5 hours, rising to 12000kW. The power supply curve of the present application, aiming at large-size graphite electrode, ensures that the internal stress and volatile matter in the graphitization temperature rising process are within the controllable range; aiming at the high sulfur content of sponge coke and projectile coke in the electrode blank formula, the rapid reaction and release of sulfur and sulfur carbon compounds during high temperature heating are controlled, the internal force generated during graphitization is reduced, thereby reducing cracks, preventing the formation of small holes and cracks in the electrode, and improving the density and conductivity.

The application relates to the field of graphite electrode baking technology, and discloses a method for baking and impregnating graphite electrodes in two steps; through the synergistic effect of the intelligent collaborative temperature control method, the whole-process inert protection system, the waste heat step-by-step utilization path and the clean combustion directional pollution discharge, high-precision temperature stability control of the two-step baking process is realized, the coke powder activation temperature fluctuation is compressed to 10-20 DEG C, the uniformity of coke powder activation and the consistency of blank baking are ensured, the mechanical strength and the electric conductivity of the graphite electrode are greatly improved, through the nitrogen gas curtain and the multi-stage oxygen removal design, the blank oxidation loss rate is reduced to below 0.08%, the pollutants are prevented from degrading the protective medium, meanwhile, the waste heat of the first baking is utilized, the waste heat utilization rate is greatly improved, the fuel gas consumption is reduced, and the reuse times of the coke powder are increased, finally, the product quality stability and the production economy are improved.

The present application relates to a kind of coking wastewater advanced treatment method and system, method includes: the water quality characteristics of coking wastewater are pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler;Coking wastewater is sent into biochemical pool and carries out biochemical reaction, and modified polyurethane suspended filler is placed in biochemical pool;The effluent of biochemical pool is sent into electro-catalytic oxidation device and carries out electrolysis reaction, and electro-catalytic oxidation device uses modified anode electrode as anode electrode, and uses graphite electrode as cathode electrode;The effluent of electro-catalytic oxidation device is sent into filler adsorption tower and carries out adsorption treatment, and modified fly ash filler is placed in filler adsorption tower.The present application is pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler for coking wastewater advanced treatment for the water quality characteristics of coking wastewater, can economically and efficiently reduce the content of TOC, total fluorinated alkyl compound and total cyanide in coking wastewater.

The application is an array type electrostatic sensor, a projectile velocity measuring device and method based on the sensor. The array type electrostatic sensor is in the shape of a tube coaxially arranged behind the projectile outlet and the barrel or bore body, and a plurality of circumferentially arrayed graphite electrodes in a pleated triangle structure are arranged at the upstream and downstream cross sections along the axis of the tube. The measuring device comprises an induction unit, a signal conditioning unit and an analysis and calculation unit, obtains the electrostatic induction signal component belonging to the projectile, then according to the velocity range of different projectile models, selects the electrostatic induction signals of the electrodes at different positions in different cross sections to reconstruct the charge distribution and establish the cross correlation sensitivity matrix, and further based on the correlation focusing principle of the electrodes at different cross sections, proposes a data fusion algorithm of multiple sensor electrodes, and finally measures the muzzle projectile velocity. The application proposes to use electrostatic field sensing measurement as a new means for projectile testing in view of the complex environment of high temperature and high pressure at the muzzle.

The utility model relates to a graphite electrode structure, and belongs to the technical field of graphite electrodes. The graphite electrode assembly comprises a graphite reducer union, a graphite screw rod, a graphite joint and a graphite electrode, a first internal threaded hole and a second internal threaded hole are formed in the graphite reducer union, the first internal threaded hole is formed above the second internal threaded hole, the diameter of the first internal threaded hole is larger than that of the second internal threaded hole, and the first internal threaded hole is in threaded connection with an external thread of a copper rod; the upper end of the graphite screw rod is in threaded connection with the second inner threaded hole; the graphite joint is provided with an internal thread and is in threaded connection with the lower end of the graphite screw rod, so that the upper end surface of the graphite joint is propped against the lower end surface of the graphite reducing joint; the graphite electrode comprises an upper end part and a body part, the body part is arranged below the upper end part, the upper end part is provided with an external thread, the external thread of the upper end part is in threaded connection with the internal thread of the graphite joint, and the body part is used for discharging. The graphite electrode has the effect of improving the problem that the graphite electrode is prone to arc breaking.

The invention discloses a vertical blocking management and control structure and method for a contaminated site through combination of electrophoresis and microorganisms, and relates to the technical field of soil and underground water remediation management and control. An anti-oxidation graphite electrode is inserted into the boundary of a to-be-managed and controlled area of a polluted site to serve as an anode, a microbial bacterial solution and a cementing solution are injected at the same time, an open-screen steel pipe parallel to the anti-oxidation graphite electrode in a staggered mode is inserted into the managed and controlled area to serve as a cathode, and the adjacent anode and cathode are connected with a direct-current power source through a cable to form a plurality of electrode pairs. Under the action of electrophoresis, clay particles with negative charges and other colloidal particles in soil around the boundary of the site move towards the anode, and along with point cementation among soil particles at the anode and continuous deposition of calcium carbonate under the induction of microorganisms, a vertical barrier wall is finally formed. Colloidal particles in the soil are promoted to be cemented through electrophoresis and microorganisms to form a vertical barrier for risk management and control of a polluted site, and the method has the remarkable advantages of being low in building material dependency degree, small in construction disturbance, easy to maintain in the later period and the like.