45results about How to "Guaranteed practical value" patented technology

The invention relates to a silicon / silicon oxycarbide / graphite composite negative electrode material which is a silicon-containing material which has the size being lower than 3 microns uniformly and is firmly distributed on the surface of a negative electrode of graphite. The invention further provides a preparation method of the composite negative electrode material. The preparation method comprises the steps of dispersing a silicon-containing material in a liquid organo-siloxane monomer, sequentially adding an acid liquid of alcohol and water, a curing agent and a graphite negative electrode material, then carrying out ball milling or mechanical stirring, pinching and mixing to obtain a paste-type mixture; calcining the paste-type mixture at high temperature under a protective atmosphere, crushing and sieving to obtain different-particle-size silicon / silicon oxycarbide / graphite lithium-ion battery negative electrode material. The silicon-containing materials of the silicon / silicon-oxygen carbon / graphite composite negative electrode material are firmly and uniformly distributed on the surface of a graphite material; due to the structure, the silicon-containing materials can be effectively adsorbed on the surface of the graphite, the self agglomeration of the silicon-containing material can be avoided and the silicon-containing material is prevented from peeling off from the graphite; the silicon / silicon oxycarbide / graphite composite negative electrode material has the characteristics that the charge and discharge specific capacities are adjustable, and the electrochemical cycle stability is high.

The invention relates to a silicon-based composite negative electrode material for a lithium ion battery, wherein a silicon-containing material with the size of less than 0.3 [mu]m is dispersed uniformly in a porous silicon oxygen carbon skeleton. The invention also provides a method for preparing the composite negative electrode material, wherein the method includes the steps: dispersing the silicon-containing material in a liquid organo-siloxane monomer, successively adding an ethanol-water acidic solution, a curing agent and an amorphous carbon source precursor solution into the dispersion liquid, and carrying out heat preservation to make the mixed solution cured; carrying out high temperature calcination on the precursor after curing in a protective atmosphere, to obtain a bulk silicon-based composite material; and crushing the bulk silicon-based composite material by ball milling to obtain the silicon-based lithium ion battery negative electrode material having various different particle sizes. The silicon-containing material in the silicon-based composite negative electrode material is firmly and evenly distributed in the porous silicon oxygen carbon skeleton, and the structure can effectively bear a volume effect brought by embedding and stripping of lithium and has the characteristics of adjustable charge / discharge specific capacity and high electrochemical cycle stability.

The invention provides a MOS transistor radio-frequency circuit simulation macro model and a parameter extraction method thereof. The simulation macro model comprises a MOS transistor simulation model, a gate resistor RG connected between a transistor gate node and a circuit grate node in series, a capacitor Cjun.s and a resistor Rjun.s and a capacitor Cjun.d and a resistor Rjun.d respectively indicating the a source electrode and a substrate, as well as the junction capacitance and parasitic resistance therebetween, and two resistor Rbulk and Rwell respectively indicating bulk resistance and trap resistance of the transistor. The four resistors Rjun.s, Rjun.d, Rbulk and Rwell are connected at one point, and indicate the parasitic resistance introduced by the substrate with a T-shaped structure. The invention also provides a method for extracting parameters of each element of a substrate network structure in the macro model using the equivalent circuit Y-parameter analytic method. The invention simulation macro model is suitable for frequency up to 20GHz, improves model accuracy of the MOS transistor in 20GHz high frequency domain, and expands the frequency application range of CMOS circuit EDA design.

The invention discloses a lithium ion battery silicon metal composite negative electrode material and preparation method thereof. The composite negative electrode material is prepared by mutually filling silicon-containing material SiOx and metal oxide-containing material, then coating with amorphous carbon and dispersing in graphite material, wherein x is greater than or equal to 0 and less than or equal to 2, and y is greater than or equal to 0 and less than 4. The stoichiometric equation of the composite negative electrode material is SiMzOw-aC. The preparation method is as follows: (1) weighting a certain amount of a silicon-based SiOx material, a metal oxide-containing material MOy, organic carbon and a graphite precursor raw material for screw extrusion for 0.5-24 h to fully mix the precursor material; and (2) calcining the mixed precursor raw material in a protective atmosphere at 600-1400 DEG C for 0.5-12 h, and performing post-processing to obtain the silicon metal composite negative electrode material. The silicon metal composite negative electrode material has good electrochemical stability. The preparation method is simple, the used equipment is general industrialization equipment, and mass production is easy.

The invention discloses a silicon-based composite anode material for a lithium ion battery and a preparation method thereof. The anode material comprises a graphite skeleton and an amorphous carbon layer which coats the graphite skeleton. The graphite skeleton is filled with a silicon material coated with a carbon-containing structure. The silicon material and the graphite skeleton are combined through a loose carbon material. The preparation method at least comprises the following steps: (1) preparing the silicon material coated with the carbon-containing structure; (2) preparing spherical particles with graphite as the main body; (3) coating the spherical particles with the amorphous carbon layer; and (4) granulating. According to the invention, the electric insulation problem of silicon anode due to its volume change can be solved, and it can be guaranteed that silicon active component can always be electrically contacted with a current collector during the charge-discharge cycle process. Meanwhile, huge stress effect caused by volume expansion / shrinkage of the active material silicon is further buffered. Then, the composite material has characteristics of high electrochemical cycle stability and regulable specific capacity.

The invention discloses a big data based construction cost information management platform, and relates to the technical field of building industry. The platform comprises an information management foundation layer, an information data display layer, a business system access layer, an information resource data center layer, an information management application layer and an information managementapplication support layer, wherein the information management foundation layer comprises a cloud host, a cloud storage and construction cost network resources; the information data display layer comprises a mobile terminal and a PC terminal; the business system access layer comprises an investment decision making system, a bidding and purchasing system, a construction management system and a completion settlement system; the information resource data center layer comprises a policy and regulation library, a material price information base and an industry information data base; the informationmanagement application layer comprises an information acquisition module, an information processing analysis module and an information query module; the information management application support layer comprises a data management service module, a user registration service module and a user management service module. Based on a big data based platform technology, a powerful guarantee is provided for enterprise development.

The invention relates to a silicon / carbon composite anode material for lithium ion batteries and a preparation method thereof. The material is composed of a graphite framework material, a middle buffer layer SiOC material, carbon fiber and a silicon-containing material with the carbon-coated surface, wherein the silicon-containing material with the carbon-coated surface is combined with the graphite framework material through the buffer layer SiOC and carbon fiber. Stoichiometric equation of the composite anode material is aSiOz@dAC-bSiOxCy&cCF-C, wherein a is less than or equal to 0.2 and greater than 0; b is less than or equal to 0.4 and greater than 0; c is less than or equal to 0.1 and greater than 0; d is less than or equal to 0.1 and greater than 0; z is less than or equal to 2 and greater than or equal to 0; x is less than 4 and greater than 0; and y is less than or equal to 20 and greater than 0. In the composite material, the amorphous carbon-coated silicon material is effectively contacted with graphite under the action of SiOC and carbon fiber so as to avoid agglomeration of the silicon material itself and peeling of graphite. According to the invention, charge-discharge specific capacity is adjustable, and electrochemical cyclic stability is high.

The invention provides a sterilization assembly, a cooking utensil and a sterilization method. The sterilization assembly comprises a shell, a control panel and an ultraviolet lamp. The shell is detachably arranged on the cooking utensil. The shell is connected to the cooking utensil in a clamped mode; and the control panel is connected with the shell and is located in the shell. The ultraviolet lamp is electrically connected with the control panel, and the control panel can control the turning on and / or turning off of the ultraviolet lamp. The ultraviolet lamp is arranged, and the ultravioletlamp is used for sterilizing food in the cooking utensil, the sterilization efficiency can be effectively improved, it is guaranteed that the food can be stored in the cooking utensil for a long time, especially the cooking utensil with an appointment function can be appointed for a long time, the deterioration of the food in the appointment time is avoided, and the maximum appointment time of the cooking utensil is greatly prolonged.

The invention discloses a water quality detection device, comprising a floating plate, wherein a first protection box is arranged on the top surface of the floating plate; matching first and second support rods are respectively arranged on both sides of the inner bottom surface of the first protection box; turntables are symmetrically arranged between the first and second support rods and are located inside the first protection box; the two turntables are connected with each other through a plurality of placement racks; the top surface of each placement rack is successively provided with a PHdetector, a dissolved-oxygen detector, a sulfide detector, an ammonia nitrogen detector and a phosphoric acid detector; the end surface of one turntable, close to the first support rod, is fixedly connected with a first rotating shaft; the first rotating shaft is movably connected with the side surface of the first support rod; and the end surface of the other turntable, close to the second support rod, is fixedly connected with a second rotating shaft. The water quality detection device of the invention has the beneficial effects of reasonable design, convenience in usage, and capability of sampling and detecting water at different water layers and greatly improving the working efficiency of testing personnel; and the water quality detection device is suitable for promotion.

The invention discloses an intelligent control stadium water supply and drainage system and a control method thereof, and relates to the technical field of building equipment. The system comprises a monitoring management center and a water supply and drainage subsystem; the monitoring management center comprises a control subsystem; the control subsystem comprises a monitoring unit, a central processing unit, a debugging unit, a storage unit, a video image acquisition unit, a detection unit, a communication unit and a terminal; the monitoring unit is sequentially connected with the central processing unit, the communication unit and the water supply and drainage subsystem through a data transmission module; the water supply and drainage subsystem comprises a purification unit, a water storage tank, a water distribution tank, a water pump, a sewage recovery module and a rainwater collection module. According to the invention, the water supply and drainage subsystem is monitored in realtime by setting the control subsystem. The sewage recovery module and the rainwater collection module are arranged. The monitoring of the water supply and drainage subsystem in the stadium is effectively improved. The self-sufficiency of the water supply is realized. The water supply and drainage subsystem is suitable for popularization.

The invention discloses a beauty skin care sprayer and a system thereof, which relate to the technical field of beauty instruments. The beauty skin care sprayer comprises a base with a first inner chamber and a top seat with a second inner chamber. A shell is fixedly inserted on the peripheral side of the top seat. One end surface of the shell is provided with a fog outlet hole. A liquid outlet nozzle is fixedly inserted into the other end surface of the shell. One end of that liquid discharge nozzle is connected with a peristaltic pump through a liquid delivery pipe. An aire outlet nozzle isfixedly inserted into the circumferential side of the shell. One end of that air outlet nozzle is connected with an air pump through an air delivery pipe. An air inlet pipe is further fixed on circumferential side of the shell. A digital pressure gauge is connected to one end of the air inlet pipe. The peristaltic pump and the air pump are arranged in a cooperative manner, and then the skin careliquid flowing out of the liquid outlet nozzle forms the conical structure and generates the jet which breaks up into micro liquid droplets by the instability of the jet when the jet is ejected from the fog outlet hole, thereby realizing the atomization of the skin care liquid; and the beauty skin care sprayer and a system thereof have a high market application value.

The invention discloses a sewage detection device for factories, which comprises a frame, a support plate is arranged at the bottom of the frame, a storage box is provided on one side of the top surface of the support plate, a power supply is provided on the inner bottom surface of the storage box, one side of the power supply is located in the storage box A controller is arranged on the inner bottom surface, a rotating shaft is arranged on one side of the storage box and the other side on the top surface of the supporting plate, a first motor is arranged on one side of the rotating shaft and on the top surface of the supporting plate, and a first gear is arranged on the output shaft of the first motor , the first gear is meshed with the second gear, the second gear is arranged on the output shaft of the rotating shaft, the detection equipment body is arranged on the top surface of the frame, and a support frame is provided on one side of the detection equipment body and on the top surface of the frame. A second motor is arranged on the side and on the top surface of the frame. The beneficial effects of the invention are: the detection device can not only realize the detection of sewage components, but also detect the components of insoluble particle impurities in sewage, which is suitable for popularization.

The invention discloses a solid electrolyte material with low interface impedance and a preparation method of the solid electrolyte material. The material comprises a major structure with a chemical formula Li1+x+yAlx(Ti,Ge)2-xSiyP3-yO12, and lithium iodide dispersed in the major structure, wherein the major structure of the material is an NASICON fast ion conductor; x is greater than 0 and less than or equal to 0.4; y is greater than 0 and less than or equal to 0.1; and the mass percentage a of lithium iodide in the material is greater than 0 and less than or equal to 10%. The preparation method of the material comprises the following steps of (1) synthesizing the major structure: selecting raw materials according to a stoichiometric equation of the solid electrolyte material and performing planet ball milling, cold pressing and a solid-phase reaction to obtain the major structure of the dense flaky solid electrolyte material, and (2) performing modification treatment: soaking a sample obtained in Step (1) in a lithium iodide aqueous solution, performing heating for some time, taking the sample out, cleaning the sample and performing vacuum drying treatment. According to the solid electrolyte material and the preparation method, a lithium iodide material with lithium ion conduction property is added to a solid electrolyte layer, so that the interface impedance is reduced, a three-dimensional ion conduction network is formed, and the ion conductivity is improved.

The invention relates to a novel air water generator high in efficiency. The novel air water generator comprises a condensation mechanism, the condensation mechanism comprises a compressor, a condenser, an expansion valve and an evaporation assembly, the compressor is communicated with the condenser and an evaporation assembly, and the expansion valve is communicated with the condenser and the evaporation assembly. In the novel air water generator high in efficiency, air enters an outer shell through all air inlet pipes and touches protruding blocks on an evaporation plate, part of the air flows back, cross flow is formed by the back-flowing air and the entering air, air disturbance is enhanced, and thus air condensation time is prolonged; another part of the air flows along the semi-circular edges of the protruding blocks, the contact area of the air and the evaporation plate is increased, and the air condensation effect is further improved; in addition, two through holes are formed in an inclined mode, so that air collides after passing through the two through holes, air disturbance is further enhanced, the air condensation effect is improved, and thus practical value of the air water generator is guaranteed.

The invention discloses a dust particle detection device, which comprises a base, wherein a bottom tank is arranged on the top surface of the base; a water tank is arranged on one side of the bottom surface in the bottom tank; a water injection pipe is arranged on one side of the water tank; one end of the water injection pipe penetrates through the bottom tank and extends to the outer side of thebase; a micro water pump is arranged on the top part of the water tank and is located in the bottom tank; a water inlet end of the micro water pump is connected with a water outlet end on the top part of the water tank through a first water conveying pipe; a first clapboard is arranged on one side of the water tank and is located in the bottom tank in a matching way; a power supply is arranged onone side of the first clapboard and is located on a bottom surface in the bottom tank; a controller is arranged on the top part of the power supply and is located in the bottom tank; a second clapboard is arranged on one side of the power supply and is located in the bottom tank in the matching way. The dust particle detection device provided by the invention has the beneficial effects that the detection device is simple and reasonable in structure design, capable of detecting components of dust particles, capable of providing an effective auxiliary measure for treating polluted air, beneficial to greatly improving the work efficiency of a detection department, and suitable for being popularized.

The invention discloses a dust particle detection device, which comprises a base, wherein a bottom tank is arranged on the top surface of the base; a water tank is arranged on one side of the bottom surface in the bottom tank; a water injection pipe is arranged on one side of the water tank; one end of the water injection pipe penetrates through the bottom tank and extends to the outer side of thebase; a micro water pump is arranged on the top part of the water tank and is located in the bottom tank; a water inlet end of the micro water pump is connected with a water outlet end on the top part of the water tank through a first water conveying pipe; a first clapboard is arranged on one side of the water tank and is located in the bottom tank in a matching way; a power supply is arranged onone side of the first clapboard and is located on a bottom surface in the bottom tank; a controller is arranged on the top part of the power supply and is located in the bottom tank; a second clapboard is arranged on one side of the power supply and is located in the bottom tank in the matching way. The dust particle detection device provided by the invention has the beneficial effects that the detection device is simple and reasonable in structure design, capable of detecting components of dust particles, capable of providing an effective auxiliary measure for treating polluted air, beneficial to greatly improving the work efficiency of a detection department, and suitable for being popularized.

The invention discloses a bird feeding device matched with a landscape lamp, and relates to the technical field of bird feeding equipment. The bird feeding device comprises a base; the base is connected with a lamp holder through a lamp post; the lamp post is of a hollow structure; a feeding hole is formed in the peripheral side face of the lamp post; a valve is cooperatively arranged inside the feeding hole; a controller is arranged inside the lamp post; one opposite side faces of the upper portion of the lamp post are each provided with a positioning groove; a baffle is rotationally connected to the exteriors of the positioning grooves; a transmission pile is arranged inside the lamp post; the transmission pile is in sliding connection with the inner surface of the lamp post through a first lifting mechanism; one opposite side faces of the upper portion of the transmission pile are each provided with a groove; a supporting rod is rotationally connected to the interiors of the grooves; one end of the supporting rod is rotationally connected to the baffle; one side face of the baffle is connected with a feeding groove through a rotating mechanism; a feeder is arranged inside the lamp post; the feeder is connected with the inner surface of the lamp post through a second lifting mechanism. The adjustable feeding groove and the feeder are arranged on the lamp post, the landscape ornamental effect is effectively improved, and the device is suitable for being popularized.

The invention discloses a building outer wall air conditioner outdoor unit rain sheltering device and a control system thereof, and belongs to the technical field of building equipment. The rain sheltering device comprises a base plate. Opposite side faces of the base plate are fixedly provided with side supporting frames. The upper portions of the two side supporting frames are connected througha top plate. A sliding groove is formed in one surface of the top plate. A movable plate is arranged on the upper surface of the top plate. A sliding rod is fixedly arranged on the lower surface of the movable plate. A part of section of the sliding rod penetrates through the sliding groove in a matched inserting manner. One power telescopic rod is at least fixed to the upper surface of the base plate. The output end of the power telescopic rod is fixedly provided with a power rod. The upper end of the power rod is rotationally connected to one edge of the movable plate. The power telescopic rod and the power rod are used for driving the movable plate to outwards slide to the set position along the surface of the top plate, accordingly, the front position of an air conditioner outdoor unitis shielded, the situation that rainwater is blown and beaten to the air conditioner outdoor unit due to wind power is avoided, the situation that rainwater enters the air conditioner outdoor unit, and consequently components rust is effectively resisted, and the service life of the air conditioner outdoor unit is prolonged.

The invention relates to the technical field of eggbeater and discloses a manually adjustable stepless speed change eggbeater. The eggbeater comprises an eggbeater shell, wherein a stirring rod is arranged at a left end of the eggbeater shell, a motor is fixedly connected to the interior of the eggbeater shell, and a gearbox fixedly connected with an output shaft of the motor is arranged at a left end of the motor; a right end of the stirring rod is fixedly connected with a connecting rod, the connecting rod is movably sleeved with an installation tenon block, a left wall of the eggbeater shell is provided with an installation tenon groove matched with the installation tenon block, and the connecting rod is provided with an installation mechanism. According to the stepless speed change eggbeater capable of being manually adjusted, by arranging the mounting mechanism, stirring rods can be correspondingly adjusted and replaced under different use conditions, so practicability of the eggbeater is improved, the situation that different types of eggbeater bodies need to be used is avoided, a practical value of the eggbeater is guaranteed, The stirring rod is relatively simple to mount or dismount, so use efficiency of the eggbeater is improved.

The invention relates to a silicon / carbon composite anode material for lithium ion batteries and a preparation method thereof. The material is composed of a graphite framework material, a middle buffer layer SiOC material, carbon fiber and a silicon-containing material with the carbon-coated surface, wherein the silicon-containing material with the carbon-coated surface is combined with the graphite framework material through the buffer layer SiOC and carbon fiber. Stoichiometric equation of the composite anode material is aSiOz@dAC-bSiOxCy&cCF-C, wherein a is less than or equal to 0.2 and greater than 0; b is less than or equal to 0.4 and greater than 0; c is less than or equal to 0.1 and greater than 0; d is less than or equal to 0.1 and greater than 0; z is less than or equal to 2 and greater than or equal to 0; x is less than 4 and greater than 0; and y is less than or equal to 20 and greater than 0. In the composite material, the amorphous carbon-coated silicon material is effectively contacted with graphite under the action of SiOC and carbon fiber so as to avoid agglomeration of the silicon material itself and peeling of graphite. According to the invention, charge-discharge specific capacity is adjustable, and electrochemical cyclic stability is high.

The invention discloses an industrial coal slag detection device, which comprises a frame, a support plate is arranged at the bottom of the frame, a storage box is provided on the top surface of the support plate, a power supply is provided on the inner bottom surface of the storage box, one side of the power supply is located on the inner bottom surface of the storage box A controller is provided, a detection device body is provided on one side of the top surface of the frame, a first support frame and a second support frame are symmetrically arranged on one side of the detection device body and on the other side of the top surface of the frame, the top of the first support frame and the The top of the second support frame is connected by a horizontal plate, the top surface of the horizontal plate is provided with a fixed seat, one side of the fixed seat and the top surface of the horizontal plate are provided with a first motor, the output shaft of the first motor is provided with a first gear, the first gear A second gear is meshed on the top, and a plurality of connecting rods are symmetrically arranged on the bottom surface of the second gear. The invention has the beneficial effects that: the detection device has a simple and reasonable structural design, can accurately detect the components of the coal slag, can greatly improve the utilization rate of the coal slag, and is suitable for popularization.

The invention discloses an energy-saving environment-friendly street lamp and relates to the field of industrial machinery. The energy-saving environment-friendly street lamp comprises a lamp post and a lamp shade, the lamp shade is arranged at the top end of the lamp post, the energy-saving environment-friendly street lamp comprises a light emitting module and a power supply module, the power supply module is a solar battery, the solar battery comprises a solar battery panel and a storage battery, the solar battery panel converts solar energy into electric energy, the electric energy is stored in the storage battery, and the storage battery provides electric energy for an LED. The energy-saving environment-friendly street lamp realizes to convert the solar energy into electric energy and convert the electric energy into light energy, the whole process is energy saving, environmental friendly and pollution free, and accordingly the street lamp is very environmental friendly, and the street lamp is good for the sustainable development of resources.

The invention discloses an elevator falling preventive device applicable to old building transformation, and relates to the technical field of elevators. The elevator falling preventive device comprises an elevator car body. The elevator car body is arranged in a shaft; a speed sensor and a controller are fixed to a surface of the elevator car body; a clamping mechanism is arranged on the upper portion of the elevator car body; a speed reduction mechanism is arranged on the lower portion of the elevator car body; the clamping mechanism comprises limit components, a first motor and clamping rods; two ends of each limit component are fixed to the inner wall of the upper portion of the shaft and the inner wall of the lower portion of the shaft; the first motor is arranged on the upper surfaceof the elevator car body; the clamping rods are slidably arranged on the upper portion of the elevator car body; the speed reduction mechanism comprises speed reduction plates, a second motor and retardance components; the speed reduction plates are fixed onto the inner wall of the shaft; the second motor is arranged on the lower surface of the elevator car body; the retardance components are slidably arranged on the lower portion of the elevator car body. The elevator falling preventive device has the advantages that the clamping mechanism and the speed reduction mechanism are matched with each other, and accordingly the operating safety factors of elevators in old buildings can be increased.

The invention discloses a winding device of tubular medical equipment, and relates to the technical field of production equipment of medical equipment. The winding device comprises a rack, and two brackets are symmetrically arranged on one side of the top surface of the rack; a winding mechanism is arranged on the top surface of the rack; the winding mechanism comprises two rollers; rotating shafts are arranged on the end faces, away from each other, of the two rollers; one ends of the rotating shafts are rotatably connected to the brackets; one end of one rotating shaft is connected with a first driving mechanism; cavities of which one ends are open are formed in the rollers; second driving mechanisms are arranged in the cavities; a winding ring is arranged in openings of the rollers in asliding manner; the two ends of the winding ring are connected with the second driving mechanisms; a combined mounting groove is formed in the winding ring; a bunch ring is connected in the combinedmounting groove in a clamping manner; the bunch ring comprises a ring rack and a clamping seat; an arc-shaped rod is connected to one end of the ring rack in a sliding manner; and a clamping hole is formed in the clamping seat. According to the winding device, the winding ring is arranged, and the bunch ring is cooperatively arranged, so that winding efficiency is effectively improved, and the winding device is suitable for popularization.

The invention discloses an auxiliary device for improving elevator car operation stability, and relates to the technical field of elevators. The auxiliary device comprises a hoistway with a car body;slide rails are mounted on opposite inner side walls of the hoistway; first groove ways are formed in near surfaces of the two slide rails; second groove ways are formed in opposite side surfaces of the first groove ways; mounting grooves are formed in one surfaces of the first groove ways; fixed bases are fixed on opposite side surfaces of a car body, and are rotationally connected with rotatingshafts; gears are fixed on the rotating shafts, and are engaged with racks; the rotating shafts are inserted in the second groove ways; the gears are arranged in the first groove ways in a cooperatingmanner; and the racks are mounted in the mounting grooves. As the slide rails and the fixed bases are respectively mounted on the hoistway and the car body, through cooperation of the gears and the racks, the elevator operation stability in old buildings is further improved, the fear sense in the hearts of passengers is effectively reduced, and the auxiliary device is suitable for popularization.

The invention discloses an adjustable landscape bridge device for a garden and relates to the technical field of landscape devices. The adjustable landscape bridge device comprises a supporting base,wherein lifting mechanisms are arranged on the lower surface of the supporting base side by side; a base plate is arranged on the upper surface of the supporting base; side supporting plates are arranged on one opposite sides of the base plate; grooved plates are arranged on the other opposite sides of the base plate; the grooved plates are connected with the side supporting plates in a sliding manner; and side surfaces, away from each other, of the two side supporting plate are connected with solar panels respectively through rotating mechanisms. According to the invention, a distance betweena supporting plate and a water surface is monitored in real time by arranging a liquid level sensor, the supporting base is driven to move vertically by using the lifting mechanisms so as to keep thedistance between the supporting plate and the water surface unchanged all the time, and electric energy is self-sufficient by using the solar panels and a hydroelectric generator, so that the marketvalue of the bridge device is effectively increased, the use requirements of users nowadays are met and the landscape attractiveness is improved.

The invention discloses a grain screening funnel and relates to the technical field of grain processing equipment. The grain screening funnel comprises a funnel body, and a first discharging pipe is arranged at the bottom of the funnel body. A base plate is arranged inside the funnel body. First rotating shafts, second rotating shafts and third rotating shafts are symmetrically arranged above thebase plate in sequence. The first rotating shafts, the second rotating shafts and the third rotating shafts are all symmetrically provided with a plurality of stirring blades. Two screening plates aresymmetrically arranged inside the funnel body. The bottom ends of the two screening plates are both fixedly connected to the base plate. The screening plates are sequentially provided with first screening holes, second screening holes and third screening holes. Frist material slipping plates and second material slipping plates are obliquely arranged between the outer sides of the screening platesand the inner side of the funnel body. The bottom of each first material slipping plate is provided with a second discharging pipe. The bottom of each second material slipping plate is provided witha third discharging pipe. Due to the facts that the screening plates and the material slipping plates are arranged and the screening plates are provided with the multiple sets of the screening holes,production efficiency is improved and the grain screening funnel is suitable for popularization.

The invention relates to a silicon / silicon carbon / graphite composite negative electrode material for a lithium ion battery, which is a silicon-containing material with a uniform and firm dispersion size below 3 μm on the surface of the graphite negative electrode. The present invention also provides a preparation method for the composite negative electrode material, comprising: dispersing the silicon-containing material in a liquid organosiloxane monomer, sequentially adding an acidic solution of ethanol-water, a curing agent and graphite negative electrode material, and then performing ball milling or Mechanical stirring and kneading are mixed to obtain a paste mixture. The paste is calcined at high temperature and crushed and sieved in a protective atmosphere to obtain silicon / silicon carbon / graphite lithium ion battery negative electrode materials with various particle sizes. The silicon-containing material in the silicon / silicon carbon / graphite composite negative electrode material is firmly and evenly distributed on the surface of the graphite material. This structure can make the silicon material effectively adsorb on the surface of the graphite, avoiding the agglomeration of the silicon material itself and the interaction with the graphite. It has the characteristics of adjustable charge-discharge specific capacity and high electrochemical cycle stability.

The invention discloses anti-theft equipment for education documents based on big data. The anti-theft equipment comprises an equipment body, wherein a fixed seat is embedded in the bottom end of the equipment body, and a sealing cabinet door is movably hinged to the surface of the equipment body; a locking block is fixedly arranged on the surface of the sealing cabinet door, and an adaptive round hole is formed in the surface of the locking block; a stable top plate is fixedly arranged at the top end of the equipment body; a linkage assembly is rotationally connected to the surface of the inner wall of the sealing cabinet door; and a driving structure is attached to one end of the linkage assembly. According to the anti-theft equipment, by arranging a limiting assembly and utilizing the limiting and clamping functions of an air cushion of the limiting assembly, a fixed long plate is not prone to sliding out of the interior of the limiting assembly when the fixed long plate is stably attached to the interior of the limiting assembly, then the use effect of the fixed long plate is guaranteed, and the use value of the equipment is further increased; and the accident problem that the fixed long plate is opened by mistake is avoided, and the adaptation range of the equipment is further widened.

The invention discloses an industrial dust detector. The industrial dust detector comprises a frame. A support plate is connected to the bottom of the frame movably. A threaded rod is arranged on oneside of the top face of the support plate. The top end of the threaded rod penetrates the frame to extend to the upper side of the frame. A nut is arranged on the partial section, above the frame, ofthe threaded rod in a matched mode. A first motor is arranged on one side of the threaded rod and on the top face of the support plate. A first gear is arranged on an output shaft of the first motor.A second gear is meshed with the first gear. A second gear is arranged on a partial section, below a top plate of the frame, of the threaded rod. A protection box is arranged on one side of the firstmotor and on the top face of the support plate. A first connector is arranged on the inner bottom face of the protection box. A first exhaust fan is arranged on one side of the first connector and onthe bottom face of a cover of the protection box. The industrial dust detector has the advantages of simplicity and reasonableness in structural design, capability of accurately detecting dust contentin a region and significance in air quality improvement.