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Novel reaction system for rapidly constructing plant gene site-directed knockout carrier
InactiveCN107254485AHigh speedImprove efficiencyHydrolasesVector-based foreign material introductionBiologyDouble chain
The invention discloses a novel reaction system for rapidly constructing a plant gene site-directed knockout carrier. The system comprises 1) based on a CRISPR-Cas system carrier, the carrier comprises the DNA molecules having the following characteristics: an agrobacterium infection method is used for carrier conversion to the plant, a carrier capable of simultaneously realizing driving of SgRNA by an OsU3 promoter for transcription and driving of Cas9 protein by an Ubiquitin promoter for expression; 2) restriction enzyme AarI; 3) buffer and Oligo required by a reaction of the restriction enzyme AarI; 4) target gene site specific DNA double chain; and 5) T4DNA ligase and ATP required by an enzyme reaction. The system only requires 5-10 reaction cycles for rapidly and efficiently completing a construction process of plasmid, greatly simplify the operation flow, and satisfies the requirement of rapid construction with high flux for plant gene site-directed knockout plasmid.
Owner:NANJING AGRICULTURAL UNIVERSITY
Method for accessing 802.11 wireless network channel under centralized control
ActiveCN102413582AEasy accessImprove utilization efficiencyHigh level techniquesWireless communicationInter frame spacePacket loss rate
The invention relates to a method for accessing an 802.11 wireless network channel under centralized control. On the premise of retaining a competitive mechanism, the method changes a random backoff channel accessing mode into a wireless controller (AP, access point)-based centralized control mode, thus optimizing the following problems in the channel accessing process: (1) the waiting time for random backoff of a station (STA) is not necessary and different inter-frame space (IFS) durations are uniformly replaced by a short inter-frame space (SIFS) duration, thus reducing time delay of frame transmission, improving the use ratio of a channel and greatly increasing the throughput of a system; (3) when multiple stations compete for channels simultaneously, the occurrence of collision is avoided, the accessing time delay of the stations is reduced, and the packet loss rates of the stations are reduced; and (4) stations do not use channel availability assessment (CAA), thus reducing energy consumption of the stations.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Method for ultrasonic cleaning of polished sapphire substrate wafer
ActiveCN103537453AImprove oxidation capacityAvoid readsorptionCleaning using liquidsElectrolysisMetal impurities
The invention relates to a method for ultrasonic cleaning of a polished sapphire substrate wafer and provides a method for conducting cleaning through ultrasound and a solution to remove particles and metal ions and then conducting cleaning through ultrasound and oxidation liquid to remove organic matters. According to removal of the particles and the metal ions, an FA / O type chelating agent and two kinds of non-ionic surface active agents including JFC and AEO are selected and prepared to mixed liquid in proportion and the ultrasonic action is added so that cleaning can be conducted; anodic oxidation liquid obtained through electrolysis of a diamond film (BDD) is selected to remove organic pollution, the oxidation liquid is high in oxidation function, and therefore most organic matters are resolved. According to the method, comprehensive cleaning of the particles, the organic matters and metal impurities is conducted, the number of steps is small, operation is simple, and the method can satisfy the requirement of the new-period micro-electronic cleaning technology.
Owner:江西伟嘉创展企业管理有限公司
Cooling air path system of unmanned aerial vehicle
InactiveCN106672225AEfficient physical coolingExempt from usingAir-treatment apparatus arrangementsRotocraftUncrewed vehicleSource area
The invention provides a cooling air path system of an unmanned aerial vehicle. The cooling air path system comprises an airflow source, air guiding holes, an air path and air outlets, wherein the airflow source is generated by rotation of paddles on all vehicle arms, the air guiding holes are formed in the portions, corresponding to paddle tail rotating areas, of the top faces of all the vehicle arms, the air path is a gap channel between the inner wall of a vehicle body and internal modules of the vehicle body, and the air outlets are formed in the position, corresponding to a heating source area, of the bottom of the vehicle body. The airflow source guides airflow into the inner sides of the vehicle arms through the air guiding holes, and the airflow enters the air path, flows through the heating source area and then is exhausted from the air outlets. The cooling air path system of the unmanned aerial vehicle is good in whole vehicle cooling performance and low in noise.
Owner:YUNEEC INT (CHINA) CO LTD
Integral type casing centralizer and manufacturing method thereof
The invention provides an integral casing centralizer and a manufacturing method thereof, belonging to the field of oil and gas well cementing. The integral casing centralizer is processed by uniform wall thickness material pipe or plate, including hoops at both ends, and limbs located between the hoops at both ends; the limbs are evenly distributed on the circumference, and each The two ends of each limb are respectively connected with the hoops at both ends; each limb is arched outward; the outer diameter of the centralizer formed by all the limbs is smaller than or equal to the inner diameter of the upper casing.
Owner:CHINA PETROLEUM & CHEM CORP +1
Novel three-dimensional electrode material for lithium air battery and preparation method for novel three-dimensional electrode material
InactiveCN105449226AIncrease surface areaIncrease profitMaterial nanotechnologyCell electrodesGas phaseLithium–air battery
The invention discloses a novel three-dimensional electrode material for a lithium air battery and a preparation method for the novel three-dimensional electrode material, and belongs to the field of a chemical power source. The novel three-dimensional electrode material comprises carbon paper, 1-20% of carbon nanotube and 1-20% of catalyst based on the mass percent of the overall electrode material; the carbon nanotube is deposited on the carbon paper by chemical vapor deposition; and the catalyst is loaded on the carbon nanotube by electrochemical deposition. The preparation of a binder-less electrode material is realized; a complex powder electrode preparation process is avoided; and an oxygen electrode is simple in structure and easy to assemble.
Owner:GUANGXI NORMAL UNIV
Battery piece PECVD post-plating film reworking piece processing method
ActiveCN107331734AExempt from usingReduce the use effectFinal product manufactureSemiconductor devicesGlass knifeEngineering
The invention discloses a battery piece PECVD post-plating film reworking piece processing method comprising the following steps: S1, silicon nitride cutting: using a glass knife to cut and remove the silicon nitride on the surface of the battery piece, specifically, if the glass knife cutting surface is located on the contact surface between the battery piece and the silicon nitride, directly entering step 2; S2, cutting and plating film: using a pipe type PECVD plating film process to re-plate films on the surface of the battery piece. The method can well remove the silicon nitride without using a HF acid solution or by using a little HF acid solution, and the texturization and PN node production cannot be affected; the method re-plate the PECVD film on the battery piece, thus effectively reducing battery piece damages and battery piece fragment rate, reducing raw material acid solution consumption, reducing production cost, improving work efficiency, and well processing aberration reworking pieces; the method is very effective.
Owner:TONGWEI SOLAR (ANHUI) CO LTD
Sheet type ferrite inductor terminal electrode and its preparation method
InactiveCN101145434ANo investmentSave resourcesTransformers/inductances coils/windings/connectionsAlloyElectron
A terminal electrode for chip ferrite inductors and a preparation method thereof are provided, which belongs to the technical field of chip ceramic electronic components. The terminal electrode for chip ferrite inductors has a two-layered structure and is prepared by firstly forming an autologous electrode on the terminal surface of a chip ferrite inductor to increase the surface electronic conductivity of the terminal ferrite of the chip ferrite inductor, to reduce the resistivity less than 10<4> Ohm*m and to allow the ferrite on the terminal surface semi-conductive even metallized; then electroplating Ni on the autologous electrode as a conductive seed layer to form a metal Ni layer; and finally electroplating Sn or Sn-Pb alloy on the Ni layer to obtain a Ni / Sn or Sn-Pb two-layered electrode. The invention has the advantages of no use of precious metal paste in the prior preparation process of terminal electrode in chip ferrite inductor, reduced production cost, reduced consumption of precious metals, and simplified production process.
Owner:UNIV OF SCI & TECH BEIJING
Computer radiating system
InactiveCN104571423AShorten travel distanceSpeed up the cycleDigital data processing detailsWater dischargeWater flow
The invention relates to a computer radiating system which comprises a case. The case comprises a casing and a radiating assembly. The radiating assembly comprises a water channel, a water feeding pipe, a water tank, a water discharging pipe, a water flow adjusting assembly, a cooling plate and a fin group. The water discharging pipe and the water flow adjusting assembly are arranged on two sides of the water tank. The water flow adjusting assembly comprises a round water pipe and a partition plate. The partition plate is arranged in the water pipe, the middle axis of the water pipe is located on the plane of the partition plate, one side of the partition plate is connected with the pipe wall of the water pipe in a sealing mode, a gap is formed between the other side of the partition plate and the pipe wall of the water pipe, a water inlet and a water outlet are arranged in the water pipe on two sides of the partition plate, the water inlet is connected with the water feeding pipe, and the water outlet is communicated with a cooling cavity. The computer radiating system adopts the waterfall type water cooling mode to conduct heat exchange in the case, improves the computer radiating speed, omits a fan, reduces noise, omits air ports, and achieves a good dustproof effect.
Owner:HUANGGANG POLYTECHNIC COLLEGE
Multifunctional intelligent office table
InactiveCN107568910AIncrease the areaMeet placement needsOffice tablesCombination furnitureWireless microphoneSoftware engineering
The invention discloses a multifunctional intelligent office table which comprises a table top, a table body, table legs, an intelligent office system and a driving mechanism. The table top comprisesa first table top and a second table top, the first table top is movably connected with the second table top to form the L-shaped table top, the table body includes a first table body and a second table body, telescopic shafts are arranged between the first table top and the first table body, drawers are arranged on the upper layer of the second table body, a door plate type storage area is formedon the low layer of the second table body, the intelligent office system comprises a touch display screen, a wireless microphone, a reminding device and a host, and the driving mechanism is connectedwith the telescopic shafts, the touch display screen, the reminding device and the host. According to the multifunctional intelligent office table, the intelligent office system is arranged in the table top, various notice files and the like can be displayed through the touch display screen on the table top, use of paper is decreased, communication between employees is more convenient, so that the office efficiency of the employees is improved, the height and the inclined angle of the table top can be adjusted, using habits of different users are met, and working is more comfortable and convenient.
Owner:黄寒芳
Transmission opening type showcase
InactiveCN111202390AGuaranteed tightnessExempt from usingShow cabinetsWing fastenersEngineeringStructural engineering
The invention relates to the technical field of showcases, in particular to a transmission open type showcase, thereby solving defects in the prior art. The transmission open type showcase comprises acabinet body having a cavity structure. A sliding glass door is slidably arranged on the inner wall of the cabinet body; a connecting plate is fixed to the bottom of the sliding glass door through countersunk bolts. A supporting base is fixed to the inner wall of the cabinet body through bolts. One side of the supporting base is movably connected with a cylinder mounting base through a pin shaft;an oscillating cylinder is fixedly mounted on one side of the cylinder mounting base through a bolt; and a piston rod is arranged in the oscillating cylinder. With the oscillating cylinder, a limiting baffle and the like, the glass door is pushed to be opened and closed through air cylinder transmission, the moving stroke of the glass door can be limited through the limiting baffle, so that the sealing performance of the showcase can be effectively kept while collision with the showcase body is avoided; the glass door can be automatically locked through the self-locking characteristic of theair cylinder, so that the showcase is more attractive and convenient to operate.
Owner:苏州福管家智造科技有限公司
Umbrella spin-drying machine
InactiveCN107014157ASolve carrying problemsExempt from usingDrying solid materials without heatDrying gas arrangementsPublic placeSolar cell
The invention discloses an umbrella spin-drying machine. The umbrella spin-drying machine comprises a foldable solar cell panel, a draught drying oven, bearings, a rack, a motor, tuck nets, a storage battery and a draining pipe, wherein a plurality of umbrella storing holes are formed in the top surface of a constant temperature box, and the bearings are mounted in the umbrella storing holes; the side walls of the bearings are provided with clamping teeth, and the clamping teeth are meshed with the rack; the motor is mounted in the draught drying oven; an output shaft of the motor is connected with the rack, and the bearings are driven to rotate in the umbrella storing holes through the rack; the openings of the tuck nets are connected with the bearings; and the foldable solar cell panel is connected with the storage battery, and the storage battery is connected with the motor. Rainwater can be smoothly thrown out through the meshy structures of the tuck nets and discharged out by patting the draining pipe, so that concentrated collection is facilitated. The carrying problem of the umbrellas at public places at rainy days is effectively solved, and operation is convenient and rapid. As the use of plastic bags is omitted, energy is saved, and environment is protected.
Owner:ZHEJIANG UNIV
Synthetic method of micromolecule pickling auxiliary tanning agent
ActiveCN106065422APromote absorptionReduce elution rateTanning treatmentPre-tanning chemical treatmentThermometerAcetaldehyde
Provided is a synthetic method of a micromolecule pickling auxiliary tanning agent. Aniline-2,5-disulfonic acid and glyoxylic acid are added into a reactor provided with a stirrer, a thermometer and a reflux condensing tube and then are stirred evenly at a normal temperature, then the pH of the system is adjusted to be 4-5 through alkaline water, the temperature of the system is increased to 90-100 DEG C, reaction is conducted for 6 hours, the system is cooled to be at the normal temperature, the solid content is controlled to be 50% through distilled water, and then the micromolecule pickling auxiliary tanning agent is obtained. By the adoption of the pickling auxiliary tanning agent, high-exhaustion chrome tanning is achieved in the process of achieving less-acid salt-free pickling.
Owner:SHAANXI UNIV OF SCI & TECH
Supporting equipment for bridge precast hollow slab lateral mould and using method of supporting equipment
The invention relates to supporting equipment for a lateral mould and a using method of the supporting equipment, in particular to supporting equipment for a bridge precast hollow slab lateral mould and a using method of the supporting equipment. During the pouring of a hollow slab precast pedestal, after fixing parts are pre-buried under the precast pedestal, the hollow slab lateral mould is supported by a jack and adjusting lead screws. The using method of the supporting equipment comprises the following steps: during the concrete pouring of the hollow slab precast pedestal, the fixing parts are transversely pre-buried in the pedestal concrete at intervals of 1 m; during the use, the hollow slab lateral mould is hoisted on I-steel by hoisting equipment to be close to a pedestal slurry sealing pipe, and then, the bottom of the lateral mould is tightly jacked by the jack every other 1 m; one ends, connected with the lateral mould, of the adjusting lead screws are connected with corresponding small channel bars every other 1 m, the adjusting lead screws are rotated to correct the lateral mould until the lateral mould meets construction requirements. According to the invention, the structure is simple, the mounting and dismounting are facilitated, the use is flexible, the performance is reliable, the controllability and randomness are high, the construction efficiency is high, the waste of manpower and material is reduced, and high safety and reliability are achieved.
Owner:宁夏公路桥梁建设有限公司
Device for sealing plate layer of plate filter
InactiveCN111359281AImprove sealingExempt from usingStationary filtering element filtersDiaphragm pumpElectric machine
The invention relates to the technical field of aluminum plate strip foil machining equipment, in particular to a device for sealing the plate layer of a plate filter, and overcomes the defects of high cost and short service life in the prior art. The device comprises a plate layer body, and the plate layer body has a cavity structure. Filter paper is arranged in the plate layer body; the inner cavity of the plate layer body is divided into a dirty oil cavity and an oil purifying cavity by the filter paper; a motor, a screw rod, a sliding groove, a sealing ring, a pressing rod, a pressing ringand other structures are arranged; in the filtration phase, the motor drives a connecting plate to move; a sliding base and the pressing ring are driven to move by the connecting plate, after inclined sliding, the elastic pressing ring further compresses and seals the negative pressure sealing groove, the sealing effect of the negative pressure sealing groove is enhanced, the operation is convenient and fast, use of a diaphragm pump is omitted, the production cost is low, equipment is not prone to abrasion, and the service life is long.
Owner:苏州风之杰通风设备有限公司
Preparation method and application of internal-external dual cross-linked core-shell structured acrylic acid emulsion
The invention discloses a preparation method and application of an internally and externally cross-linked core-shell structure acrylic emulsion. The present invention adopts a multi-step seed emulsion pre-emulsification polymerization method to prepare an acrylic emulsion, which mainly includes preparing a seed monomer, seed emulsion polymerization, and core layer emulsion. There are four steps of polymerization and shell emulsion polymerization. After the polymerization is completed, the pH value of the emulsion is adjusted, and adipic acid dihydrazide is added to obtain an acrylic emulsion with an internal and external double cross-linked core-shell structure. The polymerization stability and the minimum film-forming temperature of the core-shell structure acrylic emulsion prepared by the present invention are greatly improved, and are applied in the field of water-based wood lacquer, while improving the cross-linking degree, density and hardness of the paint film, reducing the Water absorption and glass transition temperature of paint film.
Owner:SOUTH CHINA UNIV OF TECH
Self-circulating water treatment device for electrophoretic coating
PendingCN110451671AImprove water qualityAvoid residueFatty/oily/floating substances removal devicesPaint waste treatmentPrecipitationWater quality
The invention provides a self-circulating water treatment device for electrophoretic coating. The self-circulating water treatment device for electrophoretic coating comprises a filter tank and a sludge precipitation tank, wherein filter cloth and a reel group are arranged in the filter tank, the filter cloth is disposed below the pipe mouth of a water inlet pipe of the self-circulating water treatment device, and the reel group includes a first reel and a second reel which are arranged in parallel; and the first reel is used for winding the filter cloth, the second reel is connected with a reel driving motor, and is suitable for conveying the filter cloth from the first reel to the second reel, and the sludge precipitation tank is connected with the filter tank, is arranged below the filter tank, and is used for separating solid particles and / or grease in the filtrate obtained through treatment of the filter cloth. The self-circulating water treatment device for electrophoretic coating, not only can grease and solid particles be removed simultaneously, but also the problem that the filtration rate and filtration effect are affected due to the clogging of the filter cloth in the filtration process can be solved, so that improvement of the water quality of recycled water of the self-circulating water treatment device is facilitated.
Owner:北京正和顺汽车部件有限公司
Special electronic book for the blind
InactiveCN104318821AConvenient for daily lifeEasy to operateTeaching apparatusInput/output processes for data processingComputer graphics (images)Electronic book
The invention provides a special electronic book for the blind. The electronic book is characterized in that the electronic book comprises a touch screen, an input component and a speech component; the touch screen is divided into a control area and a reading area, the control area is carved with control buttons with Braille, the reading area is carved with reading tracking lines, and the reading area is divided into rows by aid of the reading tracking lines so as to enable at least part of text to be virtually displayed in the reading area in rows. The input component is used for inputting the text to the touch screen. The speech component is used for converting the text corresponding to a position touched by a finger into speech and reading out the speech when the touch screen is touched by the finger.
Owner:2D CARBON CHANGZHOU TECH INC
Panoramic head positioning method, panoramic head positioning system and operation method of panoramic head positioning system
ActiveCN112183503AExempt from usingReduce learning costsImage enhancementImage analysisGonial angleReconstruction algorithm
The invention discloses a panoramic head positioning method, a panoramic head positioning system and an operation method of the panoramic head positioning system. The positioning method comprises thefollowing steps: selecting a dental arch form to determine rotation track data; acquiring and analyzing two-dimensional image data of the head of the patient at each angle, calculating to obtain target depth data and point cloud at each angle, and recovering a three-dimensional surface structure of the head; registering the point cloud at each angle to obtain complete point cloud three-dimensionaldata, and determining the positions of the jaw and the mouth and the position and posture of the head; adjusting the radiation source and the detector according to the position and posture of the head to enable the face of the head to directly face the radiation source or the detector; acquiring position data of the nozzle and calculating a rotary motion starting point of the ray source and the detector; calculating moving track data according to the rotating track data and the rotating motion starting point; controlling the ray source to emit rays while controlling the ray source and the detector to move according to the movement track data, and controlling the detector to receive the rays; and processing the projection data acquired by the detector through a panoramic reconstruction algorithm to obtain a panoramic image.
Owner:SHANGHAI UEG MEDICAL IMAGING EQUIP CO LTD
Method for preparing lithium-enriched lithium manganese oxide solid solution cathode material
ActiveCN102544475BFlexible adjustment ratioHomogeneous coprecipitationCell electrodesAir atmosphereOXALIC ACID DIHYDRATE
The invention relates to a method for preparing a lithium-enriched lithium manganese oxide solid solution cathode material. The method comprises the following steps of: adding a mixed aqueous solution of nickel salt, cobalt salt and manganese salt into an oxalic acid or oxalate aqueous solution by an oxalate coprecipitation high-temperature solid state method, and stirring and reacting to generate nickel, cobalt and manganese oxalate coprecipitation; performing solid and liquid separation, washing and drying to obtain a nickel, cobalt and manganese oxalate precursor; and mixing and grinding the precursor and lithium salt, drying, baking at high temperature in an air atmosphere, and thus obtaining the lithium-enriched lithium manganese oxide solid solution cathode material. During preparation of the precursor, the proportion of the nickel salt, the cobalt salt and the manganese salt is adjusted, so that the constituents of the lithium-enriched lithium manganese oxide solid solution cathode material can be adjusted flexibly. The preparation method is suitable for large-scale, economic, stable and reliable production of the lithium-enriched lithium manganese oxide solid solution cathode material, has obvious advantages, and is high in practical value.
Owner:HUBEI WANRUN NEW ENERGY TECH DEV
Flexible packaging film for lithium ion battery, and preparation method of flexible packaging film
InactiveCN109461848AAvoid Galvanic CorrosionImprove securitySecondary cellsCell component detailsConductive materialsElectrochemical corrosion
The invention discloses a flexible packaging film for a lithium ion battery. The flexible packaging film comprises a cast polypropylene film layer, a first adhesive layer, a first rigid protective layer, a high molecular insulation middle cell fixing layer, a second rigid protective layer, a second adhesive layer and a polyester resin layer, wherein the first rigid protective layer and the secondrigid protective layer are thermally pressed on the two side surfaces of the high molecular insulation middle cell fixing layer respectively; the cast polypropylene film layer is adhered to the firstrigid protective layer through the first adhesive layer; and the polyester resin layer is adhered to the second rigid protective layer through the second adhesive layer. Therefore, the overall structure of the flexible packaging film of the lithium ion battery has good ductility and hardness; the formability is better; the use of a conductive material-aluminum foil is avoided; the possibilities ofshort-circuiting the packaging film and a negative electrode sheet and forming an ion channel and an electron channel are avoided; the possibility of electrochemical corrosion of the soft package lithium ion battery is avoided; and the safety and reliability of the soft package lithium ion battery are greatly improved.
Owner:EVE ENERGY CO LTD
Method for producing plants basin by using compost decomposed stalk
InactiveCN100448346CImprove plasticityStrong toughnessBio-organic fraction processingOrganic fertiliser preparationEmulsionNitrogen
Owner:JIANGSU ACAD OF AGRI SCI
Novel intelligent office table
InactiveCN107647601AIncrease desktop areaImprove work efficiencyOffice tablesBook-restsOffice systemsHabit
The invention discloses a new type of intelligent office desk, which comprises a desktop, which includes a first desktop and a second desktop, the first desktop and the second desktop are movably connected, so that the desktop is L-shaped; a table body, which includes the first table body and the second table body, a telescopic shaft is arranged between the first desktop and the first table body, the upper layer of the second table body is a drawer, and the lower layer is a door-type storage area; table legs; including a touch screen, a wireless microphone, a camera and a host An intelligent office system; a driving mechanism, which is respectively connected with the telescopic shaft, the touch display screen and the host. Through the built-in intelligent office system on the desktop, various notification files can be displayed through the touch screen on the desktop, which reduces the use of paper and makes communication among employees more convenient, thus improving the office efficiency of employees. The height and inclination angle of the desktop can be adjusted to meet the usage habits of different users, making the office more comfortable and convenient.
Owner:黄寒芳
Alternating-current drive circuit of LED streetlight
InactiveCN103687209ASimple structureEasy to useElectric light circuit arrangementDriver circuitTransformer
An alternating-current drive circuit of an LED streetlight comprises an input end, a lightning protection circuit, a rectification circuit and a parallel chip control circuit. The input end is connected with the lightning protection circuit which is connected with the rectification circuit, the rectification circuit is connected with the parallel chip control circuit, and a plurality of LED string light sources are connected to the parallel chip control circuit. The alternating-current drive circuit is simple and reasonable in structure, convenient to use, good in effect and easy to promote; circuit structure is simplified, quantity of elements is reduced, design difficulty is lowered, switch transformer and electrolytic capacitor are omitted, electromagnetic radiation generated by the switch transformer is avoided, service life of the LED drive circuit is prolonged, service life of the overall power supply and lamp is prolonged, the drive circuit can be welded to a lamp panel to realize integration of the two, a power supply casing is omitted, and space occupation of the drive circuit is reduced.
Owner:浙江中赛科技有限公司
Assembling method of circular track crane and circular track crane
The invention relates to an assembling method of a circular track crane and the circular track crane. The assembling method of the circular track crane comprises the following steps that an arm frame and a mast are transversely placed on a base plate, the first end of the arm frame is hinged to the base plate, the second end of the arm frame is suspended, the first end of the mast is hinged to the base plate, and the second end of the mast is suspended; an auxiliary support is vertically arranged on the base plate, and the auxiliary support upwards supports a steel wire rope connected between the second end of the mast and the second end of the arm frame; the steel wire rope is shrunk, the second end of the mast is lifted under the tension action of the steel wire rope due to the fact that the weight of the arm frame is larger than that of the mast, when the second end of the mast is lifted to the first height, the steel wire rope is separated from the auxiliary support, and when the second end of the mast is lifted to the second height, hoisting of the mast is completed; and the second height is greater than the first height. A mast self-lifting mode is adopted, so that the use of a plurality of large auxiliary cranes is avoided, the disassembly and assembly cost is reduced, and the disassembly and assembly efficiency is improved.
Owner:XCMG CONSTR MACHINERY
River sewage treatment device
ActiveCN107902762AImprove efficiencyReduce sewage treatment costsTreatment using aerobic processesWater contaminantsScrew capOxygen supply
The invention relates to a river sewage treatment device. The river sewage treatment device comprises a plurality of water purification plant cultivation systems arranged between two lateral river channels, wherein a river bottom oxygen supplying system is arranged between the adjacent water purification plant cultivation systems; the river bottom oxygen supplying system comprises four supportingframes; each supporting frame comprises a base and a supporting sleeve connected with the base, and a supporting rod is inserted into each supporting sleeve; a fixed rod is connected with one side ofeach supporting rod and a rotary sleeve sleeves each fixed rod; a traction rope is wound on each rotary sleeve; one end of each traction rope is connected with a loading assembly and the other end ofeach traction rope is connected with one corner of a sewage treatment net; the end parts of the four traction ropes are connected with four corners of the sewage treatment net and the sewage treatmentnet is dragged and stretched; the sewage treatment net is provided with a plurality of submerged plant cultivation units; each submerged plant cultivation unit comprises a base arranged on the sewagetreatment net; a plant planting pot is arranged in a groove in each base; a screw rod is connected between the bottom part of each plant planting pot and the corresponding base; fixed screw caps arefastened at two ends of each screw rod. The river sewage treatment device has strong sewage treatment persistence.
Owner:广东德隆裕鑫环境科技有限公司
A kind of supporting equipment and using method of bridge prefabricated hollow slab side form
The invention relates to supporting equipment for a lateral mould and a using method of the supporting equipment, in particular to supporting equipment for a bridge precast hollow slab lateral mould and a using method of the supporting equipment. During the pouring of a hollow slab precast pedestal, after fixing parts are pre-buried under the precast pedestal, the hollow slab lateral mould is supported by a jack and adjusting lead screws. The using method of the supporting equipment comprises the following steps: during the concrete pouring of the hollow slab precast pedestal, the fixing parts are transversely pre-buried in the pedestal concrete at intervals of 1 m; during the use, the hollow slab lateral mould is hoisted on I-steel by hoisting equipment to be close to a pedestal slurry sealing pipe, and then, the bottom of the lateral mould is tightly jacked by the jack every other 1 m; one ends, connected with the lateral mould, of the adjusting lead screws are connected with corresponding small channel bars every other 1 m, the adjusting lead screws are rotated to correct the lateral mould until the lateral mould meets construction requirements. According to the invention, the structure is simple, the mounting and dismounting are facilitated, the use is flexible, the performance is reliable, the controllability and randomness are high, the construction efficiency is high, the waste of manpower and material is reduced, and high safety and reliability are achieved.
Owner:宁夏公路桥梁建设有限公司
Drilling method of single-sided board and manufactured single-sided board
PendingCN114340174AReduced Drilling MethodGuaranteed qualityPrinted circuit detailsPrinted circuit manufactureMechanical engineeringHole drilling method
The drilling method for the single-sided board comprises the following steps that S101, a base plate is placed on a drilling table top, the single-sided board is placed on the base plate, the single-sided board is fixed to the drilling table top, and the copper face of the single-sided board faces the base plate; and S201, drilling is conducted on the single-sided board placed on the base plate, and a drill bit feeds from one side of the medium face of the single-sided board. According to the single-sided board machined through the drilling method, burrs generated after drilling are all located on the medium face of the single-sided board, and due to the fact that the medium face of the single-sided board is not provided with wires and copper, even if the burrs on the medium face of the single-sided board need to be polished subsequently, the wires are not prone to being damaged in the polishing process, and the service life of the single-sided board is prolonged. Therefore, the quality of the single-sided board after drilling is ensured. And moreover, the use of an aluminum sheet is avoided, so that the processing efficiency is improved, the quality is ensured, and the cost of a drilling procedure is greatly reduced.
Owner:鹤山市泰利诺电子有限公司
Filter screen mounting structure, fan assembly and range hood
PendingCN110160110ACustom processing is convenientLow costDomestic stoves or rangesLighting and heating apparatusMagnetic polesEngineering
The invention provides a filter screen mounting structure, a fan assembly and a range hood. The filter screen mounting structure comprises a motor and a filter screen assembly detachably mounted on amotor shaft of the motor. The filter screen mounting structure further comprises a first magnetic part arranged on the filter screen assembly, a second magnetic part arranged on the motor shaft and alimiting part arranged on the motor shaft. The first magnetic part and the second magnetic part are arranged oppositely. After the filter screen assembly arrives at a preset mounting position, the first magnetic part is located below the second magnetic part and is in a homopolar mutual repulsion state. The filter screen assembly is connected to the limiting part in an abutting manner under the action of repulsion force. By means of the filter screen mounting structure, repulsion force between same magnetic poles is utilized, and demounting and mounting to the filter screen assembly are facilitated.
Owner:GREE ELECTRIC APPLIANCES INC
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