199 results about "Lead alloy" patented technology

The invention relates to a method and a system for efficiently removing lead from high-lead gold-loaded carbon desorption electrolysis gold mud. The method comprises the following steps: baking pretreatment; pyrogenic process smelting; performing gold-silver-copper-lead alloy sheet forming; separating gold, silver, copper and lead alloy: separating gold by nitric acid; removing lead from sponge gold; removing lead from silver nitrate; recycling copper nitrate and the like. The system comprises a trolley furnace and a rotary intermediate frequency furnace connected with the trolley furnace, and a discharging opening of the rotary intermediate frequency furnace is sequentially connected with a lifting intermediate frequency furnace, a water-quenching bead splashing barrel, a gold separation kettle, a first-stage separation reaction kettle and a second-stage separation reaction kettle. A liquid outlet of the secondary separation reaction kettle is sequentially connected with a silver nitrate transfer tank, a silver reaction kettle, a filter tank, a transfer tank, a copper nitrate storage tank and a copper nitrate reaction kettle. According to the method, the lead removal procedure is added after nitric acid separation of the gold-silver-copper-lead alloy and silver nitrate chlorination precipitation, lead impurities in sponge gold and sponge silver produced in the wet smelting process can be efficiently removed, the gold content and the silver content of gold ingot and silver ingot products obtained through smelting are both larger than 99.9%, and therefore it is guaranteed that the quality of the products reaches the standard.

The invention discloses a multi-directional combined extrusion forming method for an environment-friendly lead-free copper profiled bar, and relates to the technical field of profiled bar processing, and the method comprises the following steps: S1, blank preparation: selecting a lead-free copper alloy blank, pretreating the surface of the blank, and removing an oxide layer and impurities; s2, die assembly is conducted, specifically, a combined multi-directional die is adopted and comprises an axial extrusion die, a radial extrusion die and an angle-adjustable circumferential auxiliary die, all the dies are connected through high-precision positioning devices, and the relative position precision of the dies in the extrusion process is ensured; and S3, multidirectional preheating is conducted, specifically, the assembled mold and blank are placed in a multidirectional heating furnace, multidirectional uniform preheating is conducted on the blank, the heating rate is controlled to be 5-10 DEG C / min, the temperature of the blank reaches 650-750 DEG C, and meanwhile the temperature of the mold is kept to be 550-650 DEG C. Through time sequence cooperation of axial, radial and circumferential pressure, a three-way pressure stress field is formed in the blank, and the problem of hot cracking of lead-free alloys such as bismuth brass caused by a grain boundary brittle phase is effectively inhibited.

The invention relates to an aluminum-based lead alloy / cobalt-doped coated carbon fiber powder-alpha-PbO2 composite positive grid and a preparation method thereof, and belongs to the technical field of battery grids. The aluminum-based lead alloy / cobalt-doped coated carbon fiber powder-alpha-PbO2 composite positive plate grid sequentially comprises an aluminum alloy matrix, a zinc immersion antimony layer, a nanometer La2O3-doped nickel bottom layer, a Pb-Sn-Bi-Ag alloy middle layer and a porous cobalt-doped coated carbon fiber powder-alpha-PbO2 composite active layer from inside to outside. The catalytic activity of the electrode plate is improved by utilizing high conductivity and large bearing current intensity of aluminum, and the outer layer is doped with cobalt-coated carbon fiber powder-alpha-PbO2, so that the corrosion resistance of the positive grid can be improved, and the service life of the positive grid can be prolonged. Compared with a traditional lead alloy, the aluminum-based lead alloy composite positive plate grid has the advantages that the weight is reduced by more than 50%, the tensile strength is improved by 34%, and the conductivity is improved by more than 28%. Under the condition of 100% depth of discharge (DOD), the cycle period of a lead storage battery using the aluminum-based lead alloy anode grid is prolonged by 25%, and the long-term frequent charge and discharge requirements of a lead-acid energy storage battery can be met.

The invention belongs to the technical field of energy storage materials, and relates to an interface bonding layer of lithium and solid electrolyte, an interface bonding method and application, the bonding layer is deposited on the surface of a solid electrolyte matrix material through magnetron sputtering, and the bonding layer can be composed of tin-lead alloy, tin-silver-copper ternary alloy and other materials. The electrolyte is suitable for solid electrolytes of NASICON type, garnet type, sulfide, halide and the like; the bonding process is carried out at 70 DEG C under the pressure of 200MPa, so that the interface stability of the battery is remarkably improved, the interface impedance is reduced, the energy density is effectively improved, and the cycle life is effectively prolonged; in addition, the composition of the bonding layer and lithium have certain solubility, binary or multi-element alloy can be formed, uniform deposition of lithium is promoted, formation of lithium dendrites is inhibited, and the failure risk of the battery is reduced. According to the invention, the safety and stability of the battery are improved, the overall electrochemical performance is optimized, and powerful support is provided for the practical application of the solid-state metal lithium battery.

The utility model discloses a lead alloy plate grid burr removing device which comprises a burr removing mechanism arranged on a mold base plate, the burr removing mechanism is arranged between a plate grid fixed mold and a plate grid traction roller, and the burr removing mechanism is used for being matched with a plate grid to remove surface burrs. According to the technical scheme, the lead alloy plate grid burr removing device is arranged between the plate grid outlet fixed mold and the separation rotary mold, burrs and burrs generated on the surface of a plate grid are removed in a rotary brush wheel mode through rapid rotation, meanwhile, lead oxide, oil dirt and other foreign matter accumulated on the surface of the rotary mold can be removed, the surface quality of the plate grid is improved, and the production efficiency is improved. And subsequent product production is facilitated.

The invention provides a liquid lead bismuth alloy flow resistance experiment device which comprises a liquid storage container and an experiment box which are connected through a pipeline, a first pipeline is arranged between the liquid storage container and the experiment box, a second pipeline is arranged between the experiment box and the liquid storage container, and a first flow meter is arranged on the first pipeline; the experimental box comprises an outer shell, a flow channel is arranged in the outer shell, a supporting inner core capable of being taken out is arranged on the flow channel, a plurality of detachable and replaceable experimental devices are arranged on the supporting inner core, the experimental devices are located in the flow channel, a first pressure meter is arranged at the inlet end of the flow channel, and a second pressure meter is arranged at the outlet end of the flow channel. The invention further provides an experiment method based on the liquid lead bismuth alloy flow resistance experiment device. According to the experimental device and the experimental method provided by the invention, the internal structures of the rod bundle channel and the heat transfer tube channel can be simulated by disassembling and replacing experimental devices in the experimental box, and the measurement and research of the flow resistance characteristics of the liquid lead-bismuth alloy surface with different structures can be completed.

The present invention provides a zinc smelting method, comprising the following steps: mixing zinc-lead materials, urban minerals and a regulator to obtain a mixed material; the elements and element mass fractions in the mixed material include: 10-50% lead, 10-40% zinc, and 2-15% copper; adding the mixed material to a molten pool reduction furnace, and after the mixed material is melted, a zinc-lead-copper melt entering the molten pool of the molten pool reduction furnace and a bed material maintained in situ are obtained; a first reaction gas, a zinc-lead-copper melt and a bed material are introduced into the molten pool, and a crude lead alloy, zinc vapor and slag are obtained through a reduction reaction; wherein the reduction reaction is carried out under non-oxygen-enriched conditions, the oxygen content in the atmosphere in which the reduction reaction is carried out is 0-20%, and at least one of the first reaction gas and the regulator includes a reducing agent. The present invention can selectively reduce the mixed material under non-oxygen-enriched and low reducing power conditions by controlling the ratio of the mixed material and the slag, thereby effectively improving the direct recovery rate of valuable metals and zinc.

The utility model discloses a sample preparation tool for a lead alloy direct-reading spectrometer sample. The sample preparation tool comprises a to-be-prepared sample, a high-density alloy steel plate and an extrusion device, the high-density alloy steel plate is horizontally fixed below the working platform; a sample to be prepared is positioned under the high-density alloy steel plate; the extrusion device is used for driving the to-be-prepared sample to continuously rise until the to-be-prepared sample is extruded to the high-density alloy steel plate, so that the preparation of the sample is completed; the extrusion device comprises a large piston cylinder, a small piston cylinder and a hydraulic oil tank; the large piston cylinder and the small piston cylinder are vertically placed side by side, and a sample to be prepared is placed at the top end of a large piston of the large piston cylinder; a rodless cavity of the small piston cylinder is connected with a rodless cavity of the large piston cylinder through an oil conveying pipeline, and a second one-way valve is installed on the oil conveying pipeline. An oil outlet pipe of the hydraulic oil tank is communicated with a rodless cavity of the small piston cylinder through a first one-way valve, and an oil return pipe of the hydraulic oil tank is connected with a rodless cavity of the large piston cylinder through an oil drain valve. Small and irregular lead alloy direct-reading spectrometer samples can be conveniently prepared, and the production and research and development efficiency is improved.

The application belongs to the technical field of lead-free tin paste, and particularly relates to high-performance lead-free tin paste, a preparation method and application thereof; the high-performance lead-free tin paste comprises lead-free alloy powder, carbon nanotube composite and fluxing agent in a mass ratio of 12-15:0.5-1:84.5-87; the carbon nanotube composite comprises carbon nanotubes, carbon nanohorns, nano indium tin oxide, quaternary ammonium salt surfactant and liquid rosin; the fluxing agent comprises, in terms of mass percentage, hydrogenated rosin 30-40%, activating agent 5-10%, thixotropic agent 4-8%, stabilizer 1-5% and solvent to make up the balance to 100%; the high-performance lead-free tin paste provided by the application has low welding point cavity rate, high shear strength and good temperature cycle impact resistance.

The invention discloses anti-corrosion and anti-leakage glue, a preparation method and a lead-acid storage battery, and relates to the technical field of lead-acid storage batteries. The glue provided by the invention is prepared from the following components in parts by weight: 60-95 parts of toluene; 1 to 10 parts of polyethylene; 0.1 to 5 parts of styrene; 1 to 10 parts of polyisobutene; 1-10 parts of hydrogenated rosin; and 0.1 to 5 parts of toner. Adding toluene into a closed container, heating, cutting polyisobutene into small blocks, adding into the closed container, carrying out heat-preservation stirring, adding polyethylene, styrene and hydrogenated rosin, and carrying out heat-preservation stirring; cooling to room temperature; adding the toner, and stirring; the lead-acid storage battery comprises the terminal, and the terminal and the plastic cover are bonded by adopting the glue. By adjusting the addition amount of each component, the prepared glue can well adapt to the use environment of the lead-acid storage battery, corrosion of sulfuric acid to a lead column can be effectively reduced, and corrosion spreading of lead alloy is blocked; and the service life of the terminal is greatly prolonged.

The invention relates to a waste lead storage battery low-carbon recovery system and a recovery process thereof. The system comprises a waste battery pretreatment unit, a crushing and sorting unit and a lead smelting unit. The waste battery pretreatment unit is provided with a waste battery storage chamber, a discharge chamber, a gas collection chamber and a to-be-crushed chamber which are communicated in sequence, and is used for waste battery storage, residual electricity electrolysis hydrogen production and temporary storage; the crushing and sorting unit comprises a multi-stage crusher, a screening machine, a sorting machine and a filter press, and is used for separating to obtain a lead grid, a lead alloy block, light plastic, heavy plastic and waste lead paste. The lead smelting unit comprises a gas-liquid separation tank, a gas mixing tank and a side-blown furnace, gas generated by electrolytic hydrogen production is purified and dried and then mixed with natural gas to form mixed gas, the mixed gas serves as fuel of the side-blown furnace, and the waste lead paste is subjected to reduction smelting in the side-blown furnace to obtain lead bullion. According to the system, by-products of hydrogen production through electrolysis of waste battery residual electricity serve as smelting fuel, low-carbon environment-friendly recycling treatment of the waste lead storage battery is achieved, and the resource utilization rate is increased.

The utility model discloses an efficient stirring device for a lead alloy smelting furnace, which comprises a stirring device main body and a controller, and the controller is arranged on the right side of the smelting furnace and is in telecommunication connection with the stirring device main body; the stirring device body further comprises an adjusting platform, a stirring rod rotating device and a blade-movable stirring rod, the adjusting platform is arranged above the smelting furnace, the stirring rod rotating device is arranged below the adjusting platform, and the front end of the blade-adjustable stirring rod is connected with the tail end of the stirring rod rotating device. According to the utility model, the stirring center of the device is movable, so that the mixing efficiency is improved; the stirring angle can be adjusted, so that the mixing effect is enhanced; the stirring blades are detachable, the stirring position can be adjusted up and down, and the applicability of the device is improved; the device is high in overall stirring efficiency, short in consumed time and good in energy-saving benefit.

The utility model discloses a kind of underwater special water-resistant oil-resistant electric wire cable, including cable core, the surface of the cable core is fixedly connected with shielding layer, the surface of the shielding layer is fixedly connected with insulating filling layer.The utility model realizes underwater all-around protection by the synergistic effect of multilayer structure, wherein shielding layer insulates electromagnetic interference, ensures transmission stability;Insulating filling layer ensures electrical insulation, avoids short circuit;Lead alloy protective layer is sealed and resistant to corrosion, blocks water and corrosive substance;Buffering isolation layer absorbs impact, reduces mechanical damage;Water-blocking layer and oil-resistant layer form a barrier, prevent moisture penetration and oil erosion.Cuirass layer improves mechanical strength, stretch extrusion resistance;Wear-resistant anticorrosive coating prolongs service life;Overall structure is compact, the characteristics of each layer are complementary, with water-resistant, oil-resistant, anti-interference and other properties, suitable for various underwater special environment, practicality and reliability are strong.

The invention relates to the technical field of alloy recovery, and particularly discloses an innovative energy-saving method for waste circuit board regenerated copper and alloy product extraction, and the method comprises the following steps: S1, catalytic desoldering; s2, gradient separation: carrying out two-stage vortex separation and vibration screening on the desoldered material; s3, pulsating electrolysis is conducted, specifically, the separated copper concentrate serves as an anode, and periodic pulsating direct current is applied to a composite electrolyte; s4, membrane separation and refining: separating the electrolyte through a hollow fiber membrane module with the molecular weight cutoff of 500Da, performing electrodeposition on copper-rich liquid to obtain cathode copper, and performing pH gradient precipitation on permeate liquid to recover tin-lead alloy; and S5, precious metal recovery: carrying out microwave-assisted leaching treatment on the electrolytic residues, enriching the precious metal in the leachate through chelate resin, and repeating the step S4, so that the effects of reducing the comprehensive energy consumption of per ton of copper, and improving the purity of cathode copper and the recovery rate of tin-lead alloy are achieved.

The utility model relates to the technical field of flue gas treatment, and discloses an efficient flue gas absorption device for a lead alloy smelting furnace, which comprises a shell, an exhaust fan is arranged on the left side in the shell, and the output end and the input end of the exhaust fan are respectively and fixedly connected with a connecting pipe. According to the efficient flue gas absorption device for the lead alloy smelting furnace, the servo motor and the connecting sleeve are arranged, and the flue gas cover is arranged at the top end of the smelting furnace, so that all-directional absorption of flue gas is conveniently achieved, and the servo motor drives the driving gear to rotate through the connecting shaft; the driving gear can drive the driven gear to rotate to enable the smoke suction pipe in the driven gear to drive the smoke hood to rotate, so that the smoke hood can be conveniently rotated to open the top end of the smelting furnace, materials can be conveniently put when the smoke hood is rotated open, matching with a stirring device can be achieved, and the problem that the smoke hood is inconvenient to rotate to other places according to needs and cannot be conveniently stirred is solved. And a smoke hood is easy to shield a feeding hole to influence material feeding.

Disclosed in the present invention are a skeleton type inert lead-based rare-earth anode plate and a preparation method therefor. In the present invention, a die casting technique is used as a preparation technique. After lead metal is heated and melted, alloying elements are added to the resulting lead liquid; after alloying is completed, refining and slagging are performed, the temperature is maintained, and a copper bar is subjected to de-oiling, acid pickling, cleaning, drying and then tinning; then a metal net and the tinned copper bar are placed in a die-casting die, and the die is then closed; and a lead alloy liquid is pressed into the die by means of a high-pressure casting process, the copper bar and the metal net are coated with the lead alloy liquid, and after the lead alloy is solidified, a skeleton type lead-based rare-earth anode plate can be obtained. The anode plate prepared by the present invention has high plate surface strength, is not prone to deformation during use, has high production efficiency and long service life, and can effectively improve the production indexes of zinc electrodeposition.

Lead or lead alloys may be joined using non-consumable electrode arc welding, e.g., gas tungsten arc welding or plasma arc welding. A first metal 10 (at least 50 wt% by weight Pb) may be fused to a se

The utility model belongs to the technical field of aluminum alloy building materials, and particularly relates to a high-temperature-resistant and pressure-resistant aluminum pipe which comprises an aluminum pipe body, and the section of the aluminum pipe body is in a special shape. The connecting piece comprises a first right-angle part and a second right-angle part which are stacked and arranged on the two sides of the mounting part; the extension piece comprises a first convex part connected with the first right-angle part and a second convex part connected with the second right-angle part; the supporting piece comprises a first supporting part connected with the first protruding part and a second supporting part connected with the second protruding part. Wherein an RA330 alloy layer and a lead alloy layer are arranged on the surface of the aluminum pipe body. The aluminum pipe has the beneficial effects that the special-shaped section design of the aluminum pipe body is combined with the reinforcing structures of the first supporting part and the second supporting part, so that the compression resistance of the aluminum pipe can be remarkably improved, pressure can be more effectively dispersed, and the aluminum pipe is not prone to breakage or deformation when bearing external pressure.

The invention relates to the technical field of photovoltaic cell materials, and particularly discloses tin-lead conductive paste based on bimodal particle size distribution and a preparation method thereof, and the tin-lead conductive paste is composed of 40%-70% of T5 tin-lead alloy powder, 1%-30% of T6 tin-lead alloy powder and 5%-15% of an organic carrier. The core of the invention lies in that a tin-lead alloy system with the best comprehensive performance is preferably selected as a conductive phase, and on the basis, the defects of the existing low-temperature tin-lead paste in microstructure are fundamentally overcome by introducing a double-peak particle size distribution design; therefore, the electrode paste which is low in cost, low in process temperature, high in conductivity, strong in adhesion and low in contact resistance and is excellent in comprehensiveness is provided. Tin-lead alloy powder with bimodal particle size distribution is adopted as a conductive phase, and particularly, the tin-lead alloy powder is a compound system of T5 (15 microns to 25 microns) and T6 (5 microns to 15 microns) tin-lead alloy powder. Compared with the prior art, the method has the effects of remarkably improving the printing quality and precision, remarkably improving the conductivity and quality, optimizing the cost and improving the material stability.

The utility model discloses a lead alloy plate blank lifting device which comprises a clamping arm, a lifting chain and a kicking strap, the clamping arm further comprises a first clamping arm, a second clamping arm and a bolt pin structure, and the first clamping arm and the second clamping arm are movably connected in a crossed mode through the bolt pin structure located on the upper middle side of the first clamping arm and the upper middle side of the second clamping arm. The working length of the clamping arms can be adjusted by changing the cross position of the first clamping arm and the second clamping arm, the two ends of the lifting chain are connected to the top ends of the first clamping arm and the second clamping arm through hinges, and the front kicking strap and the rear kicking strap are installed at the front end and the rear end of a lower side support of the clamping arms in parallel. According to the lead alloy plate blank lifting device, the arm length can be adjusted, and the stability is improved.

The utility model discloses a lead alloy preparation electric heating device with a protective structure. The lead alloy preparation electric heating device comprises a base and a discharge port, an electric heating device body is arranged at the top end of the base, supporting frames are arranged on the two sides of the electric heating device body, and a smelting furnace is arranged in the electric heating device body; a discharging port is formed in the front end of the smelting furnace, a protection structure is arranged on one side of the top end of the base, and a fishing structure is arranged at the rear end of the top of the electric heating device body. According to the aluminum slag salvaging device, the salvaging structure is arranged, so that in order to enable aluminum slag salvaging to be safer, a connecting plate, a salvaging spoon, a first air cylinder and a second air cylinder are matched for use, the salvaging spoon can be obliquely placed into a smelting furnace during aluminum slag salvaging, and then the oblique salvaging spoon is leveled through the first air cylinder; according to the aluminum slag salvaging device, the aluminum slag is made to be perpendicular to the interior of the smelting furnace, then the salvaging spoon is pulled up through the second air cylinder, and therefore the aluminum slag is salvaged and is safer during salvaging.

The regenerated lead alloy pot comprises a furnace body, a lead pot is arranged in a hearth in the middle of the furnace body, the furnace body is composed of a supporting layer arranged on the outer side and a heat preservation layer arranged on the inner side, and a heat storage cavity is formed by the distance between the inner wall of the heat preservation layer and the outer wall of the lead pot arranged in the hearth. A plurality of detachable combustors which are annularly distributed at the upper part of the heat storage cavity are detachably arranged on the supporting layer; the detachable combustor comprises a compressed air sleeve, a natural gas sleeve and an oxygen sleeve which are sequentially sleeved from inside to outside. The detachable combustors are annularly distributed on the heat storage cavity of the lead pan, and the outlets of the detachable combustors are tangentially arranged along the outer wall of the lead pan, so that the periphery of the lead pan is uniformly heated, the tail ends of the detachable combustors are prevented from being directly aligned to the outer wall of the lead pan for heating, and the service life of the lead pan is prolonged.

The invention relates to the technical field of waste cyclic regeneration, and discloses a regeneration cyclic treatment method of zinc-containing waste acid in a hot galvanizing process, which comprises the following steps: step 1, zinc stripping: adding a zinc stripping additive into the zinc-containing waste acid, the zinc stripping additive being a mixture of a wetting agent and a corrosion inhibitor; step 2, iron removal: adding an iron removal agent into the zinc-containing waste acid after zinc removal, and stirring, wherein the content of iron ions in the waste liquid after the iron removal process is lower than 1g / L; step 3, electrolysis: using insoluble metal materials such as a titanium plate, a lead plate, a graphite plate and a lead alloy plate as an anode plate, and using a zinc plate, an aluminum plate or a stainless steel plate as a cathode plate; and when the concentration of zinc ions in the waste liquid is lower than 60g / L, electrolysis is stopped. And removing metal ions from the electrolyzed waste liquid, recovering the zinc removal capability, and returning to the step 1 to continuously remove the zinc. According to the invention, closed-loop circulation is realized, no wastewater is discharged, the requirement of wastewater treatment is eliminated, and the environmental protection cost is reduced.

The invention discloses an automatic die-casting machine for lead alloy pole columns, which belongs to the technical field of lead-acid storage battery production and comprises a transmission workbench, a plurality of lead alloy pole column dies are circumferentially arranged on the edge of the transmission workbench at equal intervals, the lead alloy pole column dies are movably connected with the transmission workbench, and pole column copper cores are placed in the lead alloy pole column dies. A pouring mechanism, a die-casting mechanism and an ejection mechanism are respectively arranged outside the transmission workbench, and the die-casting mechanism comprises a lead alloy pole mold positioning part and a scrap removing part which are matched with the lead alloy pole mold. According to the multi-station lead alloy pole mold, a lead alloy pole mold is driven by different stations, multiple stations work at the same time, meanwhile, one lead alloy pole mold can produce multiple products, and the production efficiency is improved; and meanwhile, a compact lead alloy pole body with a smooth outer surface is formed on the surface of the die-cast lead alloy pole, so that the casting defects are reduced, and the product quality is improved.

The utility model discloses an impurity removal device for tin stripping wastewater recovery, which relates to the technical field of tin stripping wastewater recovery and comprises a base frame, an impurity removal box is obliquely arranged at the top of the base frame from top to bottom, a liquid discharge hopper is arranged at the bottom end of the impurity removal box, and a side wall pipe is arranged at the connecting end of the impurity removal box and the liquid discharge hopper in a surrounding manner. A plurality of groups of liquid outlet holes distributed at intervals are formed in the inner wall of the side wall pipe, in the waste liquid impurity removal process, waste liquid can be pumped out of the tin liquid box in a pressurized mode through the pressure pump, the waste liquid is conveyed into the side wall pipe through the three-way pipe and the main flow hose, the waste liquid can be guided to the side wall of the liquid drainage hopper through the liquid outlet holes formed in the side wall pipe, and the waste liquid can be discharged out of the side wall of the liquid drainage hopper. By means of the device, the tin-lead alloy coating film fragments attached to the side wall of the liquid discharging hopper can be washed and cleaned, the device can wash the film fragments attached to the interior of the device while waste liquid impurity removal is conducted, the follow-up cleaning workload is greatly reduced, and the operation burden of workers is relieved.

This invention discloses a weather-resistant and fatigue-resistant offshore wind power cable structure and method, which solves the problem in the prior art where poor water-blocking performance of wind power cable structures leads to water tree formation in the conductor insulation layer due to moisture intrusion, resulting in a gradual deterioration of insulation performance. It has the beneficial effect of improving overall water-blocking performance and fatigue resistance. The specific solution is as follows: A weather-resistant and fatigue-resistant offshore wind power cable structure includes, from the inside to the outside, a conductor unit, a metal sealing sheath, a water-blocking buffer layer, an armor layer, and an outer sheath. The conductor unit is provided in at least one set, and a conductor core is provided inside the conductor unit. The conductor core is filled with water-blocking paste, and the conductor core is covered with a water-blocking tape, making the conductor core a water-blocking composite structure. The metal sealing sheath is a lead alloy sheath, which is covered on the outside of the conductor unit by an extrusion molding process to achieve radial absolute water blocking. The water-blocking buffer layer includes a radial water-blocking tape and an elastic buffer layer arranged from the inside to the outside.

The invention relates to the technical field of automatic shoe washing, in particular to an automatic shoe washing machine and method.The automatic shoe washing machine comprises a washing barrel body, an ultrasonic generation module and an inclined hanging type brushing mechanism, the washing barrel body is of a three-layer composite structure, the inner layer is a mixture of polypropylene and glass fiber, the middle layer is a lead alloy sound wave reflecting layer, and the outer layer is a stainless steel protective shell; a sound wave reflection structure is arranged on the inner wall of the inner layer; the ultrasonic generation module comprises piezoelectric ceramic vibrator arrays installed at the bottom and on the side face of the cleaning barrel body. The inclined hanging type brushing mechanism comprises a rotatable elastic support and a fixed brush set, the elastic support is transversely arranged on the cleaning barrel body, and the fixed brush set is arranged on the side wall of the cleaning barrel body. The intelligent shoe cleaning machine has the multiple technical effects of being intelligent, self-adaptive, efficient in cleaning, energy-saving, environment-friendly, capable of achieving low-damage protection on shoe materials and the like, and is suitable for automatic cleaning scenes of various shoes.

This invention discloses a test method for the resistance of lead-grid alloy in the positive electrode plate of a storage battery to hydration short circuits, specifically implemented according to the following steps: Step 1, preparing an electrolyte for electrochemical scanning; Step 2, fabricating a working electrode; Step 3, using a three-electrode system on an electrochemical workstation, performing linear sweep voltammetry (LSV) on the working electrode to determine the peak potential and current density of the oxidation peak appearing in the potential range of -0.4V to 0.4V. This invention aims to solve the problem of hydration short circuits in storage batteries existing in the prior art.

The present invention provides a lead-acid battery having excellent high-temperature durability and capable of suppressing the reduction of water content in an electrolyte. The lead-acid battery of the present invention comprises a battery container having a battery chamber, a plate group accommodated in the battery chamber, and an electrolyte injected into the battery chamber, the plate group comprising a plurality of alternately arranged positive plates and negative plates and a separator arranged between the positive plates and the negative plates, the positive plate comprising a positive electrode mixture containing a positive electrode active material and a positive electrode collector plate (11) comprising a grid-shaped portion (110) holding the positive electrode mixture, the positive electrode collector plate (11) being formed of a lead alloy, the lead alloy containing Ca in a range of 0.035 mass % or more and 0.08 mass % or less, containing Sn in a range of 0.50 mass % or more and 1.0 mass % or less, containing Ag in a range of 0.003 mass % or more and 0.035 mass % or less, containing Bi in a range of greater than 0 and 0.02 mass % or less, and the remainder being composed of lead and unavoidable impurities.

The utility model discloses a lead-coated copper battery terminal, which relates to the technical field of battery terminals and comprises a battery jar and a battery cover, the battery cover is mounted on the battery jar, terminal inner cores are mounted on two sides of the battery cover, the bottom end of each terminal inner core is positioned inside the battery cover and is provided with a plum-blossom-shaped base, and the battery cover is mounted on the battery jar. A terminal shell is cast outside each terminal inner core, the terminal inner cores are made of copper alloy, and the terminal shells are made of lead alloy. According to the utility model, the lead-coated copper structure is adopted, the material cost is reduced, the plasticity of lead alloy and the design of the plum-blossom-shaped base are utilized, the vibration of a vehicle is buffered, the loosening and falling of the pile head are reduced, and in addition, the terminal inner core is provided with the anti-skid stripes and the terminal shell made of the lead material, thereby respectively enhancing the friction force between the pile head and the inner core and limiting the displacement of the pile head; the connection reliability is ensured.