50results about How to "Weaken the centrifugation" patented technology

The invention comprises integrated axial front and back stages. The front stage fan bucket impeller has a bucket-shape forward bended rectangular main runner screw-coiling round the hub. The back stage helical centrifugal impeller has a main centrifugal runner and a branch backward bended rectangular centrifugal runner. The forward bended runner of the front stage is in communication with the backward bended runner of the back stage to form an integrated impeller.

The invention discloses a preparation process for bromoxynil octanoate. The preparation process is characterized in that octanoyl chloride, 4-cyanophenol, 50% hydrogen peroxide and bromine are used as reaction raw materials and the preparation process comprises an esterification reaction step and a bromination reaction step according to a reaction sequence. The preparation process has the advantages as follows: the steps of bromination mother liquor recovery, centrifugation and drying are eliminated, dry powder feeding is avoided, the occurrence rate of contamination accidents is reduced, the yield is increased, material consumption is reduced, equipment investment is reduced and the production cost is reduced.

The invention relates to the technical field of strain culture mediums, in particular to a culture medium treatment method for increasing the number of lactobacillus acidophilus fermentation and lyophilization viable bacteria. Compared with the prior art, according to the nutritional requirements of the lactobacillus acidophilus, on the basis of a bacterium enrichment test by adding organic pea protein powder, impurities obtained after centrifugation, emulsification and lyophilization of fermentation liquid are reduced to improve the number of the viable bacteria of lyophilization lactobacillus acidophilus powder.

The present invention is process of synthesizing alpha-(N-methyl-N-benzylamido)-3-hydroxy acetophenone hydrochloride. Alpha-(N-methyl-N-benzylamido)-3-hydroxy acetophenone hydrochloride is synthesized with 3-acetoxy acetophenone and methylbenzyl amine as main materials, and butyl acetate as solvent, and through bromizing, amination and hydrolysis reaction. The present invention has the features of simple technological process, facile materials, high product yield, high product purity, low cost, environment friendship, etc.

The present invention relates to a centrifuge rotor, in particular a laboratory centrifuge rotor, including a rotor body, wherein the rotor body at least partially includes a porous metal or a porous metal alloy and an armoring located radially outside with respect to the rotation axis of said rotor body is provided. The centrifuge rotor allows centrifugation to be performed in a shorter time than previously and at a higher rotational speed. This results, inter alia, in higher RCA (relative centrifugal acceleration) values and thus in a very rapid separation of the constituents of the substances to be centrifuged.

The invention relates to a flake silver @ silver iodate visible light photocatalyst and a preparation method thereof. The preparation method comprises the following steps: respectively dissolving sodium iodate or potassium iodate and silver nitrate in water, adding one solution into another solution under the stirring condition so as to generate suspension of silver iodate; dripping hydrazine hydrate, sodium borohydride and other aqueous solutions containing reducing substances into the obtained suspension, irradiating the suspension under illumination of a xenon lamp of 300W for 5-30 minutes by adopting a photoreduction method, generating metal silver nanoparticles on the surfaces of silver iodate particles in situ, and finally, filtering the precipitate, washing and drying to obtain the flake silver @ silver iodate visible light photocatalyst. The method can be implemented at room temperature and under normal pressure, the cost is low, the equipment is simple and easy to operate, large-scale production can be realized, and the method has significant potential application in the aspect of industrial production. The prepared flake silver @ silver iodate photocatalytic material has high photocatalytic performance, the elemental silver and silver iodate generated due to in-situ reduction are firmly bound, and separation of photon-generated carriers is obviously improved.

The invention relates to a method for synthesizing alpha-(N-methyl-benzyl)-3-hydroxy acetyl benzene, taking 3-acetoxy acetyl benzene and methyl-benzyl amine as main raw material, taking single butyl acetate as dissolvent and comprising bromation, amination and hydrolytic reaction. It is characterized by simple process, easy-getable raw material, no usage of inflammable, explosive and toxic chemical dissolvent, and increased productivity by 5%, high purity, low cost and little waste.

This invention relates to a fluid conveying device, in addition to an applying method of the device in conveying, characterized in that the device comprises solid shaft front and rear two stages, and the front stage turbine fan scoop wheels are several same disks superimposed, the rear screw centrifugal impeller are several same plans; the plan whirl rectangle main channels are connected with each other to form an integrated blade wheel, making the main channels of the integrated blade wheels are rectangle turbine fan scoop wheels anticentripetal main channel whose front and rear is a twist big section surface in axial and radial. The invention has a special turbine fan scoop sprue and a radial turbine blade forming the sprue, cutting in fluid from the blade wheel excircle, making the rotating mechanical energy has stronger transforming ability to the fluid.

The invention relates to a grass mowing plate for mowing lawns, bushes and the like and aims to overcome the defects that existing grass mowing plates are low in lawn mowing efficiency and difficult to mow plants such as the bushes. The grass mowing plate comprises an upper plate, a lower plate and blades, wherein the upper plate and the lower plate are mounted together, and a cavity is formed between the upper plate and the lower plate, a plurality of blade openings are formed in the lateral side of the lower plate, an edge is disposed on side of each blade, the blades are movably mounted in the cavity formed by the upper plate and the lower plate and correspond to the blade openings in the lower plate, and power drives the blades to extend out of the blade openings and rotate fast to perform mowing. When grass mowing plate is not used, the blades retract into the grass mowing plate, and cut caused by accidental touch is avoided. Compared with the existing grass mowing plates, the grass mowing plate is efficient in mowing of the lawns, the bushes and the like, and safe and convenient to operate.

According to the invention, a one-step method is adopted, based on solvothermal synthesis, polyvinylpyrrolidone (PVP), zinc nitrate hexahydrate (Zn(NO3)2.6H2O), 2-aminoterephthalic acid (C8H7NO4), anN,N-dimethylformamide / alcohol mixed solvent and chloroauric acid HAuCl4 are blended and loaded in a hydrothermal kettle for making a reaction, a metal organic frame structure is formed, and meanwhile,a gold nanoparticle core is formed through decomposition of the chloroauric acid under the high temperature condition; and meanwhile, micelle formed by the PVP is used, growth of the MOF-5 structureis limited, so that the MOF-5 composite material which has monodispersity, is uniform in particle size and is of the gold nanoparticle core-shell structure is prepared.

The invention relates to a cantilever crane. The cantilever crane comprises a stand column, a jib, a movable trolley and an electric hoist, wherein the movable trolley moves along the jib; the electric hoist is mounted on the movable trolley; the jib has a retractable structure and comprises a cantilever and a balance arm; one end of the cantilever is rotatably mounted on the stand column; the balance arm is slidably mounted on the cantilever and moves in the length direction of the cantilever; a driving mechanism which drives the balance arm to move is arranged between the movable trolley andthe balance arm, so that the balance arm and the movable trolley move synchronously, and the movement directions of the balance arm and the movable trolley are opposite; and the stand column is further provided with a locking device for locking the position of the jib. The rotating angle of the jib is locked by the locking device on the stand column, a heavy object is effectively prevented from colliding with surrounding objects, by arrangement of the retractable jib, the centrifugal effect generated during rotation of the jib is reduced, and safe and stable locking is implemented.

The invention relates to an air-injection vortex-spinning groove-shaped self-twist hollow spindle which comprises a fiber inlet (1), a yarn forming channel (2), a circumferential step groove (4), conical top plane arc grooves (5) and conical top wall face spiral grooves (3), wherein square groove bodies on a conical top plane of the hollow spindle are arc; included angles between the conical top wall face grooves and a horizontal direction are 20-40 degrees; the circumferential groove is step-shaped; and the quantity of steps is 1-3. According to the spindle, positive pressure bonded between a fiber at a free end and a wall face of the hollow spindle in a spinning process can be increased, and a friction force between the fiber and the wall face is increased, so that the twisting possibility of the fiber is improved, a cohesive force between the fibers in a yarn is increased, and the strength of the yarn is improved finally; in addition, the loss of the fibers can be reduced; and a use ratio of the fibers can be increased.

The invention discloses a body suspension device for automobile assembly. The body suspension device comprises a suspension mechanism, wherein wheels are mounted on two ends of the suspension mechanism; coil springs are mounted on two sides of the lower part of the suspension mechanism; each coil spring is provided with a corresponding shock-absorbing pad on one side; a shock absorber is mounted between the coil springs; an oil storage chamber is connected to one end of a piston head through a piston push rod; a compression damping mechanism is mounted inside the shock absorber; two ends of the bottom of a control rod are connected to central control arms through welding pieces; a torsion rod is externally wrapped with a protective shaft sleeve; a Watt link is mounted below the torsion rod; a lifting lug is arranged on one end of the shock absorber; and a compression spring is mounted on one side of the lifting lug. Through the arrangement of the coil springs, the shock absorber, the torsion rod, the Watt link and the compression spring, the body suspension device for automobile assembly solves the problems that an existing body suspension device for automobile assembly is poor inshock-absorbing and cushioning effect, and that the inclination angle of the wheels can not be adjusted in time.

Embodiments of the invention provide a detection reagent and a detection method of an anthraquinone compound. The detection reagent comprises a hydrogen bond acceptor and a hydrogen bond donor corresponding to the hydrogen bond acceptor, wherein the hydrogen bond acceptor comprises L-menthol; and the hydrogen bond donor comprises acetic acid. The detection method comprises the following steps: heating a to-be-detected solution; adding the detection reagent into the to-be-detected solution; performing ice bath after uniform mixing to obtain a solidified layer and a liquid layer; after the liquid layer is poured out, adding a deflocculating agent into the solidified layer for deflocculating; and measuring the content of the anthraquinone compound by HPLC. According to the detection reagent and the detection method provided by the embodiments of the invention, tedious centrifugation and filtration are reduced; on the basis of reserving the ion advantages, the detection reagent and the detection method have the characteristics of low cost, environmental protection, high efficiency and the like; and in addition, the application of DESs also avoids the use of a demulsifier, so that the problem that the mass spectrometry detection cost of the anthraquinone compound is high in the prior art is solved.

The invention provides a regulator of a feeding device of a forged part forming machine. The regulator comprises a height regulating unit and a motor-driven unit; the height regulating unit is provided with a permanent fulcrum and a swing arm, wherein the permanent fulcrum shaft is fixed on the back surface of the machine; the top of the swing arm is pivotally connected with the permanent fulcrum shaft; the motor-driven unit is provided with a motor and a drive gear set, wherein the motor is arranged on a surface of the swing arm, which is far away from the back surface, and is positioned in the axial direction of the permanent fulcrum shaft; and the drive gear set is arranged on the top surface of the swing arm and the top surface of the motor. The regulator is used for greatly reducing the centrifugal effect and the inertia effect of the motor, therefore, the whole machine can achieve the efficacies of effectively reducing the load of the feeding operation and increasing the regulating precision.

The invention discloses a high-specific-area O-doped surface-modified silkworm-excrement-based microporous carbon material as well as a preparation method and an application thereof. Firstly, silkworm excrement and water are mixed, swelled and freeze-dried, and carbonized silkworm excrement is prepared from the freeze-dried silkworm excrement in the protective gas; the carbonized silkworm excrement and KOH are mixed and subjected to an activation pore enlargement reaction in the protective gas, a high-specific-area silkworm-excrement-based microporous carbon material is obtained after washing, centrifugation and drying, and the high-specific-area O-doped surface-modified silkworm-excrement-based microporous carbon material is prepared in a plasma reactor in the oxygen atmosphere and can be applied to sustained or controlled release of pesticides. The silkworm excrement is carbonized and activated under the protective gas condition at the high temperature, O-doped surface modification is performed on the material in the plasma modification manner, and the obtained carbon material has the higher specific surface area and controllable O-containing polar groups and can have the higher adsorption capacity and the better sustained or controlled release effect on the pesticides.

The invention discloses an RV reducer delivery quality comprehensive performance quantitative detection experiment table and a detection method thereof. The RV reducer delivery quality comprehensive performance quantitative detection experiment table comprises an eccentric sleeve arranged on a first sensor shaft, the eccentric sleeve is sleeved with a sensor outer cylinder, and the eccentric sleeve rotates along with the first sensor shaft and a second sensor shaft; displacement signals between the laser displacement sensor and the eccentric sleeve are obtained in real time through the high-precision laser displacement sensor, a characteristic signal curve is obtained through a data acquisition card and a LabVIEW design data acquisition system, and the transmission ratio of an input shaft to an output shaft of the RV reducer is calculated after frequency spectrum transformation. The transmission error of the RV speed reducer can be obtained by comparing the theoretical transmission ratio with the actual transmission ratio, non-contact measurement is achieved through combination of the high-precision laser displacement sensor and the eccentric sleeve, and characteristic signals of the RV speed reducer can be accurately captured and identified.

The invention relates to a silver-loaded silver bromate visible-light-induced photocatalyst and a preparation method thereof. The particles of the silver-loaded silver bromate visible-light-induced photocatalyst are 200-1,500 nm in diameter, are sphere-like particles, and are loaded in situ with silver particles with the size of 10-100 nm on the surfaces. The preparation method comprises the following steps: dissolving sodium bromate or potassium bromate, and silver nitrate in water respectively; under the condition of stirring, adding one solution to the other solution to generate silver bromate suspension; dripping the aqueous solutions of reducing substances such as hydrazine hydrate and sodium borohydride, into the obtained silver bromate suspension, or adopting a photoreduction method to generate silver nanoparticles in situ on the surfaces of the silver bromate particles; finally, precipitating, filtering, washing and drying to obtain the silver-loaded silver bromate visible-light-induced photocatalyst. According to the invention, the material provided by the invention has very good photocatalytic performance; the elementary substance, silver generated in situ and the silver bromate are firmly combined; the preparation method is simple; the low cost is low; the reaction conditions are mild; the yield is high; requirements equipment are low; the silver bromate visible-light-induced photocatalyst is suitable for industrial production.

The invention discloses a rotary weir plate for an immersion plating tank. The rotary weir plate comprises a box body, a rotary guiding mechanism and a fixing plate, wherein the box body is provided with an accommodating cavity for storing liquid; two passage openings are formed in two opposite surfaces of the box body separately; a material strap enters the box body from one passage opening and penetrates out of the box body from the other passage opening; the rotary guiding mechanism is positioned on the two sides of the passage openings and is provided with a roller, and the axis of the roller is vertical; bearings are coaxially fixed at shaft ends on the two sides of the roller; the rotary guiding mechanism is fixedly connected with the box body through the fixing plate; a kidney-shaped hole extending horizontally is formed in the fixing plate; a thread hole is formed in the box body; the kidney-shaped hole is connected with the thread hole through a bolt; the roller is provided with a cylinder body and a rotary shaft; a blind hole is formed in the shaft end of the cylinder body; the axis of the blind hole coincides with the axis of the cylinder body; and the bearings are in contact with the outer circumferential surface of the rotary shaft and the inner circumferential surface of the blind hole. According to the rotary weir plate, the roller and the bearings are coaxiallyfixed, the rotating resistance of the roller is small, the roller is driven by the material strap to rotate without wearing the clad layer on the surface of the material strap, and guiding of the roller to the material strap is smoother.

The invention relates to an improved hub structure with a flow guide structure at inner side of a rim. The improved hub structure comprises a rim; a shaft hub is arranged at the central shaft of the rib; one upward end of the shaft hub is connected with the rib through a spoke; the flow guide structure is arranged at the inner side of the rib; the surface of the flow guide structure, relative to the rib is a rough inclined surface; two inclined surfaces are intersected with each other; a flow guide groove is formed in the part in which the spoke and the rib are in connection transition. According to the improved hub structure, the flow guide structure is arranged at the inner side of the rim and can prevent water from being thrown to the inner side of the rib and stopped at the inner side of the rib all the time under the centrifugal force; water can be directly in contact with the rough flow guide structure; the centrifugal effect of water can be effectively reduced through the rough flow guide structure; the water impacting the rough flow guide structure is slow in speed; water downwards flows along the inclined surface of the flow guide structure until entering the flow guide groove, and finally flows out of the hub of a car through the flow guide groove at the part in which the spoke and the rib are in connection transition, so that water can be prevented from accumulating at the inner side of the hub of the car.

The invention discloses an anti-scaling sufficient mixing reaction kettle capable of continuously reacting. The feed method of the material is changed, the tangential feeding is adopted, feeding components are distributed in the two directions of a reactor, the wall of the reaction kettle and a heating tube are continuously flushed, the feeding temperature is the lowest, the feeding components arebe in direct contact with the heating surface, the heating effect is improved, the temperature of the material in the reaction kettle is much closer to the reaction temperature, the reaction efficiency is improved, various kinds of mixing blades are combined, so that the material does not move in a certain way in the reaction kettle and forms disordered motion, the centrifugal effect is reduced,the particle material or large-gravity material is prevented from being in contact with the heating surface for a long period of time, the scaling of the material is avoided; meanwhile, the mixing ismore sufficient, the reaction efficiency is improved, the scaling is reduced by more than 90% by using the equipment provided by the invention, the temperature is accurately controlled, the material is mixed evenly, and the reaction rate is increased by 5%.

The invention discloses a data compression method and device based on an auto-encoder, and relates to the field of auto-encoders, the data compression device comprises an auto-encoder shell, the auto-encoder shell is of a cylindrical structure with an opening in one side, and an auto-encoder dismounting plate is fixed at the opening of the auto-encoder shell through a screw; the other side of the auto-encoder shell is integrally provided with an auto-encoder fixing plate, the auto-encoder fixing plate is provided with an auto-encoder fixing hole, and in order to solve the problems that when the auto-encoder is applied to an industrial motor, the overall equipment is likely to occupy a large area, the end of the auto-encoder shell is provided with a transmission connection assembly, and the transmission connection assembly is arranged on the end portion of the auto-encoder shell. The self-encoder fixing plate on the self-encoder shell can be fixed on one side, close to the motor rotating shaft, of the industrial motor through screws, so that the self-encoder shell is installed on the same side of the motor rotating shaft on the industrial motor, the occupied area is saved, the industrial motor shell does not need to be perforated, the service life of the industrial motor cannot be shortened, and the cost is reduced. And the use safety of the industrial motor is ensured.

The invention relates to a method for producing and processing rabbit brain powder. The method for producing and processing rabbit brain powder includes the following steps: (1) soaking fresh rabbit brains in low-temperature acetone or physiological saline, and removing blood vessels and meninges; (2) putting the rabbit brains with blood vessels and meninges removed in an extruding device soaked in acetone, and extruding the rabbit brains from the extruding device into a grinding machine; (3) grinding the rabbit brains by using the grinding machine in a slow grinding manner; (4) after the grinding operation, starting a filter screen at the bottom of the grinding machine to further filter out the blood vessels and meninge impurities, adding the acetone, slightly shaking for multiple times, centrifuging, then removing the acetone solvent; drying, packaging and storing at 4 DEG C. The method for producing and processing rabbit brain powder provided by the invention is used for further removing more than 70% of the residual blood vessels and meninge impurities by extruding and filtering; 20% of acetone is added before the grinding type crushing and centrifuging steps, so as to reduce the colloid state of the solution, thereby reducing the difficulty of subsequent centrifuging and drying and better keep the activity of the product.