30results about How to "Avoid contact opportunities" patented technology

The invention discloses a preparation method of expandable carbon nitride flame retardant epoxy resin, which relates to the flame retardant technical field of flame retardant epoxy resin system. The expandable carbon nitride is used as the flame retardant, the epoxy resin is used as the matrix, and the curing agent is used for curing. Synergistic preparation of flame retardant epoxy resin composites. The limiting oxygen index and scanning electron microscope analysis methods are used for testing and characterization. Compared with expandable graphite, expandable carbon nitride has better compatibility. After thermal expansion, a denser carbon layer is formed, which can be well developed To heat insulation and oxygen insulation, delay or inhibit the combustion of the system. The invention successfully prepares a new generation of high-performance flame-retardant material that is halogen-free, highly efficient, non-toxic and low-smoke.

The invention discloses a plywood laminate automatic composing method. A composing procedure of a single laminate layout unit is set at a control module first, coordinate positioning of a composing working plane is initialized, and the composing procedure of the single laminate layout unit is started. According to the composing procedure of the single laminate layout unit, a positioning dischargemechanism picks a raw material veneer of specified specifications in a raw material holding area. The positioning discharge mechanism moves the picked raw material veneer onto an induction panel of ameasuring and calculating mechanism, the induction panel conducts image acquisition, and the length and width of the raw material veneer and the position of the center point of a sucker are calculated. The relative position of the center point of the sucker during discharge of the raw material veneer is calculated, and the raw material veneer is moved to the relative position in a to-be-composed area. Through the plywood laminate automatic composing method, veneers of different specifications can be arranged into an appropriate laminate layout automatically according to laminate arranging requirements, and the characteristics of automatic composing, little labor investment and low production cost are achieved.

The invention discloses a method for synthesizing cyclohexanone dimer by continuous catalytic reaction and distillation. The method comprises the following steps that: a catalytic reaction and distillation device shown in a figure is adopted, and cyclohexanone enters the a tower from the middle part of the tower; a cyclohexanone dimer and water azeotropic mixture obtained by the condensation of overhead vapor is subjected to continuous low layer resultant water separation in a water knockout vessel, and the upper layer cyclohexanone flows into the top of the tower; and tower bottom residue isheated by a reboiler, the temperature of the residue is controlled to be 250 to 280 DEG C, and 60 to 90 mass percent cyclohexanone dimer can be obtained from liquid discharged from the bottom of the tower. The method adopts continuous catalytic reaction and distillation technology and removes water in products away from a reaction field in time, thereby promoting a reaction to move toward the direction of the formation of the cyclohexanone dimer; meanwhile, the method separates the products of the reaction from a stripping section at the lower part to further eliminate the opportunity for theproducts of the reaction to contact a catalyst, thereby improving the selectivity of the cyclohexanone dimer, ensuring continuous reaction, high production efficiency and high selectivity of the cyclohexanone dimer, and facilitating industrial production.

The invention discloses a single spore separation device, a single spore separation microscope and a single spore separation method. The single spore separation device of the present invention comprises a lifting regulator, a connecting rod, a needle-shaped object fastener and a separation needle; the lifting regulator is installed at the position of the condenser lifting regulator on the microscope mirror arm; Control the rise or fall of the lifting regulator; one end of the connecting rod is connected to the lifting regulator, and the other end of the connecting rod is connected to the needle-shaped object fastener; one end of the separation needle is locked Inside the pin object fastener. The invention has the advantages of ensuring the accuracy of single spore separation; the height of the separation needle can be adjusted; the separation needle is not easy to break; frequent focusing is not required; and the operation process is simple.

The invention provides a polyester melt direct spinning method by online adding functional modifiers. The melt with 5%-10%wt of conveying capacity is taken out on a melt main pipeline and enters a dynamic mixer, the functional modifiers are added, a functional melt is generated and returns to the melt main pipeline, and the functional melt and other melts on the main pipeline enter an efficient static mixer on the melt main pipeline and are mixed again to obtain the functional melt for spinning. The invention further discloses a polyester melt direct spinning system by online adding the functional modifiers. The melt with 5%-10% of the conveying capacity is taken out on the polyester melt main pipeline, so that production of the functional melt and production of polyester are relatively independent, the basic performance of the melt is consistent with that of a melt produced by large-scale polyester, the problem of poor uniformity of the functional melt is solved by mixing twice, a re-cooling and pelleting process of the melt is omitted, machining cost is greatly reduced, the heating capacity of the melt entering the dynamic mixer is reduced, and energy consumption is low.

The invention discloses a method and device for processing off-gases in the productive process of polyester or copolyester. The method comprises the following steps of: firstly leading the vacuum off-gases containing tetrahydrofuran to be in contact with water vapor and absorbed through a water vapor injection pump, then sending a mixture of the vacuum off-gases and the water vapor to a spray absorber for carrying out spraying absorption once again; and directly sending the ordinary pressure or positive pressure off-gases containing tetrahydrofuran to the spray absorber for spraying absorption. The method and device provided by the invention can be used for processing the industrial off-gases generated by different devices in the productive process of polyester or copolyester in a differentiation manner; as one or more than two automatic regulating valves are arranged in a pipeline by which the vacuum tail gases are communicated to the water vapor injection pump, the automatic regulating valves can lead the pressures of the vacuum off-gases under different operating conditions to be kept in a constant working range so that a system can operate in a more stable condition. The device provided by the invention can avoid the probability to the maximum degree that inflammable and explosive objects are in contact with open fire, thereby the corresponding potential safety hazard is eliminated fundamentally.

The invention relates to a hinge structure which is composed of a base, at least a linkage mechanism, a shaft connecting seat and a guide mechanism. When the shaft connecting seat performs upwards opened rotation moving relative to the base, a guide piece of the guide mechanism moves upwards along the guide wall of a fixing piece to move the shaft connecting seat outwards; and simultaneously, a non-parallel four-bar mechanism composed of a first shaft bar, a second shaft bar, a third shaft bar of the linkage mechanism and the base produces a linkage action to enable the shaft connecting seat to rotate and simultaneously move upwards and outwards. According to the hinge structure, the side wall bottom edge of a front cover of a casing can not collide the side wall bottom edge of a back cover when the hinge structure is opened or closed, and the opening or the closing can be smoothly achieved.

The invention discloses a preparation method of electronic grade propylene glycol monomethyl ether and a product obtained by the preparation method, and belongs to the technical field of preparation of fine chemicals. The method comprises the following steps of: 1) mixing methanol, propylene oxide and a basic ionic liquid catalyst, and carrying out reaction in a micro-channel reactor to obtain a reaction solution; 2) removing light components from the reaction solution to obtain a light component removed reaction solution; and 3) evaporating the light component removed reaction solution obtained in step 2), and performing negative pressure rectification on the obtained steam to obtain the electronic grade propylene glycol monomethyl ether. The preparation method of the electronic grade propylene glycol monomethyl ether provided by the invention are mild in reaction conditions, the purity of the prepared product is high, the yield is high, and the activity and selectivity of the catalyst are high.

The invention provides a production device and a method for producing feed soybean meal by utilizing anaerobe fermentation. The production device comprises a feeding device, a material distributing and mixing device, a fermentation device, a drying device, a shattering device and a baling device; the feeding device comprises a filter, a discharging pit and a lifter; the material distributing and mixing device comprises a mixing cabin, a distributor, a mixer and a conveyor, which are sequentially connected with one another from top to bottom; the fermentation device adopts a matrix-type solid fermentation system; and the shattering device comprises a shattered material cabin and a pulverizer. The production process is reasonable in design, the matrix-type solid fermentation system is used for fermenting the material, the feeding and discharging systems are equipped, so that the pollution can be effectively controlled, the produced fermentation soybean meal is safe and reliable, and the production device and the method have the advantages of easiness in popularization and application.

The invention belongs to the field of detection of metallographic low power test blocks, and particularly relates to a low power test block semi-automatic pickling method. The method comprises the following steps that firstly, acid liquid is preheated in an automatic pickling bath, and temperature and etching time are set; secondly, test blocks are put into the pickling bath according to the etching degrees; thirdly, the test blocks are subjected to automatic pickling is conducted according to the set temperature and time, after the set picking time is reached, the automatic pickling bath discharges acid automatically, a fan operates at a rated maximum rotation speed, and after acid mist in the bath disappears, a pickling bath cover is automatically opened for lifting-out operation on a pallet; fourthly, the test block pallet is lifted into a cleaning pool, and test block automatic cleaning is conducted by operating a cleaning trolley travelling button; and fifthly, the test block pallet is lifted out, enters a drying device with set drying temperature and reaches a detection zone until detection is completed. The low power test block semi-automatic pickling method is capable of relieving the labor intensity, ensuring the safety of operators and improving and increasing the surface quality of the test blocks after pickling.

The invention relates to a built-in sealed continuous ink supply system with a pressure dynamic compensation function. The built-in sealed continuous ink supply system comprises an ink soft bag (1), a pressure dynamic compensation device and a printing head (5). The ink soft bag (1) is positioned above the pressure dynamic compensation device and is connected with an ink inlet (31) of the pressure dynamic compensation device by a soft bag connecting tube (2), an elastic air bag (33) is arranged in the pressure dynamic compensation device, an ink outlet (37) on the lower side of the pressure dynamic compensation device is connected with the printing head (5) by an ink supply tube (4), and the pressure dynamic compensation device is in a sealed state when ink is supplied by the ink inlet (31) and the ink outlet (37). The built-in sealed continuous ink supply system has the advantages that the ink is completely prevented from being in contact with external air, the probability of oxidation, evaporation and crystallization of the ink is reduced, and a phenomenon of head blockage is decreased; problems of air resistance, backflow, misting, overflow and the like can be effectively solved, and the built-in sealed continuous ink supply system is provided with a warning device with functions of ink deficiency voice prompting, corresponding indicator lamp prompting and the like.