215results about How to "Good split effect" patented technology

The continuous tow dispersing device includes unwinding roller, winding roller and tightening roller, as well as air separator and carding unit set successively between the unwinding roller and the winding roller. The air separator has a hollow barrel, and a tow separating cavity in the upper port of the hollow barrel with a tow separating plate with ventilating holes in the bottom and a closing cover plate in the top. The carding unit has a box; inside the box, there are horizontal upper plate with at least two parallel air slots, lower plate with air holes and carding groove between the upper plate and the lower plate; and on the box, there is mechanical vibrator. The device has simple structure, no need of outer power, tow dispersing action completed with air pressure, good tow dispersing effect, low tow damage and other advantages.

The invention discloses a constant-volume feeding device which comprises a discharge hopper, a constant-volume distributor, a feeding hopper and a distribution cylinder. A feeding pipe is connected with the upper end of the distributor cylinder, the feeding hopper is welded to the top of the feeding pipe, a discharge pipe is connected with the lower end of the distributor cylinder, the discharge hopper is welded to the bottom of the discharge pipe, the constant-volume distributor is installed in the distributor cylinder and comprises a positioning ring, distributor hammer heads and distributor baffles, the positioning ring is welded to a rotary shaft, the distributor baffles are welded to the outer side face of the positioning ring at equal intervals, and the distributor hammer heads are welded to the ends of the distributor baffles respectively. The constant-volume feeding device is simple in structure and convenient to use, constant-volume feeding of materials can be effectively achieved, the distribution effect is good, distribution is accurate, normal production and machining are not affected, continuous constant-volume feeding operation can be achieved, manual distribution is not needed, and a lot of manpower and material resources are saved.

The invention discloses a splitter for rock boring, which comprises a chassis, a large arm, a small arm and a control system, and is characterized by further comprising a propelling beam, a hydraulic rock drill, a propelling oil cylinder, a splitting machine and a switching mechanism, wherein the propelling beam is connected with one end of the small arm through an angle adjusting device; both the hydraulic rock drill and the propelling oil cylinder are arranged on the propelling beam; the propelling oil cylinder drives the hydraulic rock drill to slide on the propelling beam; the switching mechanism is connected to one side edge of the propelling beam; the splitting machine is arranged on the switching mechanism. The splitter is high in efficiency and high in splitting effect.

The invention discloses a large efficient screening-type double-toothed roll crusher provided with a distribution device. The double-toothed roll crusher comprises a crushing device and the distribution device. The crushing device comprises a crushing drive motor, a fluid coupling, a reducer, a double-drum gear coupling, a crushing box, a base support, a left toothed roll, a right toothed roll and a lubricating grease pump, wherein the crushing drive motor, the fluid coupling, the reducer and the double-drum gear coupling form two sets of crushing drive units; and the two sets of crushing drive units are connected wit the left toothed roll and the right toothed roll inside the crushing box respectively. The distribution device comprises a distribution chute, an adjustable distribution stick, a movable connecting bracket, a distribution seat and a fixed connecting bracket, wherein the fixed connecting bracket and the distribution seat are fixed on the crushing box of the crushing device, the distribution chute is fixed at a discharge port of a material output belt machine head, and the distribution chute is connected with the crushing box through the movable and fixed connecting brackets. According to the large efficient screening-type double-toothed roll crusher, the problems of capital investment, equipment movement and the like of crushing equipment combined by a plurality of devices are solved fundamentally, the labor intensity of daily equipment maintenance is reduced, and the mining of surface mine materials is accelerated.

The invention discloses a preparation method of an organic-inorganic hybrid cyclodextrin chiral stationary phase. According to the method, a surfactant is taken as a template, a silicon-based-beta-cyclodextrin derivative and a silanization reagent are subjected to a hydro-thermal synthesis method to obtain the spherical organic-inorganic hybrid cyclodextrin chiral stationary phase, average aperture of silicon ball is 2.5 nanometers, and particle size is 5-8 micrometers. The preparation method has the advantages of mild reaction condition, simple preparation process and adjustable load capacity of the cyclodextrin derivative. The organic-inorganic hybrid cyclodextrin chiral mesoporous silicon ball stationary phase is not restricted by usage of a mobile phase polar solvent during a usage process, resolution efficiency is high, and chiral resolution capability is good.

The invention discloses a novel hybrid mesoporous silica gel chromatographic stationary phase and a preparation method thereof. Under the condition of a dual-template agent, an R-(+)-1,1'-binaphthyl -2,2'-diphenol group is introduced into the surface of hybrid mesoporous silica gel and firstly applied to the chromatographic stationary phase. After column-filling operation is carried out, five kinds of binaphthyl compounds are separated successfully; and the chromatographic peak is good in shape and can be separated rapidly. The method is simple in preparation process in which a cationic surfactant and a triblock copolymer are taken as the dual-template agent, the hybrid mesoporous silica gel chromatographic stationary phase is prepared by the copolycondensation of a binaphthol derivate silicon source with 1,2-bis-triethoxysilyl ethane (BTSE) under an acidic condition. The hybrid mesoporous silica gel chromatographic stationary phase has a neat spherical shape and is homogeneous in particle diameter distribution (3 to 10 microns) as well as uniform and adjustable in particle diameter. Thus, the chromatographic stationary phase disclosed by the invention can be applied widely.

The invention relates to the technical field of preparation and application of a chiral selector, and particularly discloses a bis-(6-oxo-m-nitrobenzaldehyde sulfonyl)-beta-cyclodextrin (beta-CD-N2) as well as a preparation method and an application of the beta-CD-N2 serving as the chiral selector in high-performance capillary electrophoresis, namely the application of the beta-CD-N2 in preparation of a chiral electrophoresis monolithic column for separating chiral materials. The preparation method is characterized in that firstly a synthesis method of the beta-CD-N2 is confirmed, the derivative is characterized by using means such as ultraviolet, infrared, photoelectron spectroscopy, nuclear magnetic resonance, mass spectrometry and elemental analysis, after comprehensive analysis, the molecular formula of the derivative is identified as C54H76O43N2S2, and the derivative is identified as a target derivative and is not reported before. The beta-CD-N2 is used for preparing a chiral HPCE (high-performance capillary electrophoresis) monolithic column and separating the chiral materials such as cetirizine, mexiletine, propafenone, ofloxacin and bupivacaine and can realize baseline separation, and accordingly, a novel method for quantitative determination of HPCE of a multi-chiral material single enantiomer can be established.

The invention discloses nutrition-enhanced chewy rice noodles and a preparation method thereof. The nutrition-enhanced chewy rice noodles comprise the following raw materials: rice flour, sweet potato flour, egg meal, gluten flour, papaya powder, strawberry powder, lotus root starch, kudzuvine root powder, ginger powder, honeysuckle flower powder, liquorice root powder, xylitol, lactitol, sodium caseinate, sodium stearoyl lactylate, sorbitan monooleate, an enzyme preparation, a nutrition enhancer, diammonium phosphate, and sodium alginate. The nutrition-enhanced chewy rice noodles and the preparation method thereof disclosed by the invention are characterized in that the preparation processes are simple; and the prepared nutrition-enhanced chewy rice noodles have the advantages of rich nutrition, easy absorption and digestion, and good health-care effects; moreover, the rice noodles are fine in flexibility, chewy, long-lasting in flavor and good in taste after being cooked, and thus, appetite of people can be easily stimulated.

The invention belongs to the technical field of organic chemistry, and particularly provides a trivalent cobalt Salen catalyst, a synthesis method of the trivalent cobalt Salen catalyst as well as an application of the trivalent cobalt Salen catalyst to resolution of terminal epoxides. The trivalent cobalt Salen catalyst is prepared from raw materials which are cheap and easy to obtain through simple reactions, is a binuclear macrocyclic catalyst, is used for catalyzing hydrolytic kinetic resolution of the terminal epoxides and is used at the temperature of 15-30 DEG C, the usage amount of the catalyst is 0.008-0.02 mol% of that of a racemization epoxide, the reaction yield can be higher than 48%, and the ee (enantiomeric excess) value of the resolution product is higher than 99%. The catalyst is mild in reaction condition, low in consumption, high in resolution efficiency and capable of being applied to hydrolytic kinetic resolution of the various terminal epoxides and has the high industrial application value.

The invention discloses an MOF@SiO2 core-shell microsphere HPLC chiral column for enantiomeric resolution. A method of in-situ growth is used, aminopropyl silica gel is used as a core, and chiral MOFscontrollably grow on the surface of the core as a shell to synthesize a core-shell composite material, and the MOF@SiO2 core-shell microsphere is used as a high performance liquid chromatography stationary phase for chiral separation. Compared with a pure MOF chiral column, the MOF@SiO2 core-shell microsphere HPLC chiral column of the invention can resolve multiple enantiomers, and the chromatographic column has many advantages of higher resolution, higher column efficiency and faster separation speed, which is of great significance to improve the problems of high background pressure and lowcolumn efficiency of a pure crystal column caused by uneven crystal particles.

The invention discloses automatic slitting equipment for pipes, and relates to the technical field of pipe processing. The automatic slitting equipment comprises a control system and a rack and further comprises a feeding mechanism, a bearing roller mechanism, a clamping roller mechanism, a conveying mechanism, a cutting mechanism and a discharging mechanism which are arranged on the rack; the bearing roller mechanism is used for bearing and driving pipes to synchronously rotate; the bearing roller mechanism is sequentially provided with a feeding station and a cutting station in the length direction of the bearing roller mechanism; the feeding mechanism is used for conveying the pipes to the feeding station; the conveying mechanism is used for conveying the pipes from the feeding stationto the cutting station; the clamping roller mechanism is used for being matched with the bearing roller mechanism to jointly clamp the pipes; the cutting mechanism is used for cutting off the pipes; the discharging mechanism is used for moving the cut-off pipes out of the cutting station; and a control system is used for controlling operation of all the mechanisms. The pipes are synchronously rotated during tool feeding of a tool, so that the pipes are stressed uniformly, the edge breakage probability is greatly reduced, the rejection rate is decreased, the processing efficiency is improved, and the automation degree is high.

The invention discloses a preparation technology of chiral amino acid, comprising the following steps of: 1) performing acetylation between L-amino acid or DL-amino acid and acetic anhydride; 2) distilling the reactant obtained from the step 1), and cooling for crystallization; 3) mixing acetylated L-amino acid or acetylated DL-amino acid obtained from the step 2), toluene and a methylamine aqueous solution, an ethylamine aqueous solution or a caustic soda flake aqueous solution until the temperature reaches 80-90 DEG C, maintaining for 1.5-2.5 hours, distilling at minus 0.001-minus 0.1 MPa at 50-95 DEG C for 4-6 hours, adding water, and adjusting pH to 7-8; and 4) carrying out resolution on the substance obtained from the step 3) and D-aminoacylase or L-aminoacylase. By the preparation technology provided by the invention, impurities in the method for resolution of chiral amino acid from aminoacylase can be effectively removed, acetylation content can be raised, and the resolution effect can be obviously improved in comparison with the prior art.

The invention provides a material separation screen plate, a vibration screen device comprising the material separation screen plate, as well as stirring equipment comprising the device, and generally relates to the field of engineering equipment. A plurality of feed holes are formed on the material separation screen plate, and the material separation screen plate is of a middle-high peripheral-low structure, and is provided with opposite inner concave lateral sides in which projections in vertical direction are of inner concave shapes. The vibration screen device comprises a feed device and a vibration separation device, and the feed device is detachably arranged at the inlet on the top of the vibration separation device, wherein the feed device comprises a feed case and a separation screen plate, wherein a feed port is formed on the top of the feed case; and the separation screen plate is arranged inside the feed case, and a plurality of inlet holes are formed on the separation screen plate. The vibration screen device has a simple structure, is convenient to assemble and disassemble, and realizes that the separation effect is improved, so that a material can be uniformly distributed on a screen after entering from the feed port.

The invention provides a road crack segmentation method based on a genetic algorithm and a U-shaped neural network. A genetic algorithm is used to search a full convolutional neural network architecture of a U-shaped coding and decoding structure, so as to achieve automatic design. The problems that a road crack segmentation neural network model which is manually designed is tedious in work and large in workload, the designed model is complex, and road crack segmentation is inaccurate under complex conditions are solved, and road cracks can be automatically and accurately segmented. A structure and operation which are better than those of manual design and lower in calculation complexity are found for the modules, high robustness is achieved for interference of complex road surface image cracks, disease non-uniformity and illumination imbalance, the characteristics of the road cracks can be extracted more accurately, and therefore the segmentation accuracy of the whole image is improved.

The invention relates to a display module dismounting tool and a using method thereof. The display module dismounting tool comprises a shell, and further comprises a heating device, a sucking device and a dismounting device which are partially or integrally arranged inside the shell, wherein a clamp device used for clamping a mobile phone front shell assembly and limiting the rotational range thereof is arranged at the upper part of the shell; the heating device is connected with the clamp device and is used for heating the mobile phone front shell assembly; the sucking device is indirectly connected with the clamp device and is used for sucking the mobile phone front shell assembly; the dismounting device is connected with the clamp device and is used for ejecting the clamp device so as to dismount the mobile phone front shell assembly. The display module dismounting tool clamps the mobile phone front shell assembly through the clamp device, heats the mobile phone front shell assembly through the heating device so as to conveniently dismount each part, sucks a touch screen and a display screen of a mobile phone front shell through the sucking device, and ejects the clamp device so as to dismount a middle frame of the mobile phone front shell from the touch screen and the display through the dismounting device. The display module dismounting tool has the advantages of strong universality, simplicity in operation, convenience in maintenance and cost reduction.

The invention discloses a preparation method according to D-serine through a splitting method. The preparation method takes levo-cyclic phosphoric acid as a splitting agent, adopts a half-quantity splitting method to split dl-serine, and comprises the following steps: heating and reflowing the dl-serine and half equivalent of the levo-cyclic phosphoric acid splitting agent in an inorganic proton acid alcohol and aqueous solution; reducing temperature and devitrifying; carrying out separating and dissociating to obtain the D-serine and L-serine respectivelt; recycling the L-serine after racemization. The preparation method is simple to operate; effective utilization rate of the chiral splitting agent is increased; dosage of the chiral splitting agent is decreased; the cost is relatively low; the yield is high; products are good in purity; the preparation method belongs to the field of racemoid splitting.

The invention discloses a powdered materiel distribution device, particularly relates to a distribution device of alumina powder in an aluminium electrolysis fume purification system. The structure of the level strip type fluidization distribution device is as follows: the distribution device comprises a materiel chamber, a gas chamber and a ventilating plate, wherein, the materiel chamber is horizontally arranged or nearly arranged in a horizontal manner and communicated with at least two distribution boxes that can discharge independently; and the materiel chamber is communicated with the distribution boxes by a distribution pipe and the distribution device. The distribution device effectively carries out multi-point distribution to the alumina powder by small elevation difference, has good distribution effect, improves and guarantees the purifying efficiency of aluminium electrolysis fume and has low equipment investment, simple structure and easy execution.