82results about How to "Extended feeding time" patented technology

The invention discloses 2,3,6,7-tetracarboxylic dianhydride triptycene and a synthetic method thereof. The synthetic method comprises the following steps: preparing 2,3-dimethyl anthracene by a series of reaction of oxylene and phthalic anhydride which are cheap and easily obtained, and further reacting with 2-amino-4,5-hemellitic acid to obtain 2,3,6,7-tetramethyl triptycene; obtaining high-purity 2,3,6,7-tetramethyl triptycene by simple and rapid separation on columns, further oxidizing by potassium permanganate to obtain 2,3,6,7-tetracarboxylic acid triptycene, then obtaining the 2,3,6,7-tetracarboxylic dianhydride triptycene by dehydration. The method has the advantages of cheap and easily-obtained raw material, simple preparation method, high product purity which is up to 98% and the like, and the obtained product dianhydride monomer is fit for preparation of polyimide materials with good heat resistance and dissolubility.

The invention discloses a synthesis method for 2,3,6,7-triptycene tetracarboxylic dianhydride. The method comprises the following steps of: 1) preparing 2,3,6,7-tetramethylanthracene from o-xylene and benzyl alcohol or methylene chloride under the catalysis of anhydrous aluminum trichloride; 2) diazotizing the 2,3,6,7-tetramethylanthracene, anthranilic acid and amyl nitrite to generate a crude product 2,3,6,7-tetramethyl triptycene; 3) performing chromatographic separation on the crude product 2,3,6,7-tetramethyl triptycene, and flushing the separated 2,3,6,7-tetramethyl triptycene by using a mixed eluting agent to obtain 2,3,6,7-tetramethyl triptycene; 4) oxidizing the 2,3,6,7-tetramethyl triptycene in a mixed solvent consisting of potassium permanganate, pyridine and water under a reflux condition to generate 2,3,6,7-triptycene tetracarboxylic acid; and 5) refluxing and dehydrating the 2,3,6,7-triptycene tetracarboxylic acid in acetic anhydride to generate the 2,3,6,7-triptycene tetracarboxylic dianhydride. The method has the characteristics of readily available and low-cost raw materials, high yield and high product purity.

The invention relates to the field of automation, particularly relates to an automatic weighing and packing device for a fine powdery material and a method thereof, and solves the technical problems of providing the automatic weighing and packing device for the fine powdery material and the method thereof which are precise to pack and convenient to stack. The device comprises a coarse feeding device, a shaping and vibration transportation device, a measuring and weighing device and an edge-fold sewing device, wherein the coarse feeding device is arranged above the shaping and vibration transportation device; the coarse feeding device comprises a feeding control system, a support, a spiral feeder, a quantitative hopper and a bag holder, wherein the spiral feeder, wherein the quantitative hopper and the bag holder are sequentially arranged on the support, and the spiral feeder is connected with the upper end of the quantitative hopper; the shaping and vibration transportation device comprises a belt conveyor and a vibrator; the measuring and weighing device comprises a belt weigher, a feeder, a spiral feeder and a lifting sleeve, wherein the spiral feeder and the lifting sleeve are installed on the feeder. The automatic weighing and packing device provided by the invention has the effects of being quick and accurate in material packing efficiency and convenient to stack.

The invention relates to the technical field of preparation of a ternary positive electrode material for lithium ion batteries, in particular to a method for synthesizing a nickel-cobalt-manganese ternary precursor by utilizing a thick hopper control system. According to the invention, slurry at the bottom of a reaction kettle is pumped into a thick hopper through a pump on a material feeding pipeline, and no stirring is carried out in the thick hopper; gravity is utilized to carry out sedimentation and realize solid-liquid separation; then thick slurry is refluxed into the reaction kettle toincrease the solid content; at the same time, clear liquid is discharged to the outside through a clear liquid discharge pipeline; the system can be applied to continuous production and upgrading, canalso be used for intermittent production and upgrading, and can be opened in any process of production. When the system is in operation, the proportion of the clear liquid discharge can be increasedby increasing the material feeding flow rate, and the flow rate of the thick slurry can be changed by the opening degree of a thick slurry reflux pipeline valve. By adopting the method provided by theinvention, the production cost is effectively reduced, the operation difficulty is reduced, and the safety is improved; the precursor produced by the invention has more excellent physical and chemical indexes, and a sintered positive electrode material has more excellent performance.

The invention relates to the production field in the livestock industry and discloses an invention scheme of a high-efficient feeding trough for cattle, which can be used for solving the problems of low feed reward and waste of feed resources caused by picky eating behavior of the cattle. The high-efficient feeding trough for the cattle is characterized by comprising an upper storage trough 1, a lower intake trough 2 and a middle condition control feed conveying device, wherein the condition control feed conveying device comprises rake teeth 3, an orthogonal wheel 4, an electric motor 5, a controller 6, movable and fixed contacts 7 and a spring 8. The condition control feed conveying device can convey feed in the storage trough into the intake trough in batches, the feed amount conveyed each time is very low (2-3kg), and a prerequisite for conveying the feed each time is that the feed in the intake trough is completely taken by the cattle; therefore, the picky eating behavior of the cattle can be limited, and synchronicity and balance of feed intake can be further improved. The use of the trough has to be based on total mixed ration (TMR) feeding. By adopting the method, the occurrence of the picky eating behavior of the cattle can be thoroughly avoided, the situation of enabling the cattle to intake balanced nutrients can be ensured, the feed reward can be improved, and the feed resources can be saved. The uniform feed intake can be ensured, and the synchronicity of feed digestion can be improved, thus the high-efficient feeding trough is conductive to maintaining an environment in a normal rumen; the feed is more sanitary; the frequency of artificial feeding is reduced, and the labor intensity is reduced; and the intake time of the cattle is increased, and the intake amount is improved.

The invention discloses a siphoning type zooplankton feed incubation and feeding system and a using method thereof. The siphoning type zooplankton feed incubation and feeding system comprises a bait tank, a culture pond and a connection pipeline, wherein the bait tank comprises an incubation tank and a siphoning feeding tank which are partitioned by a partition tank, a shading incubation baffle can be inserted into the partition tank, and a live insect separation tank opening is formed in the in the bottom of the separation tank. Bait tank water inlet pipes are respectively arranged at the tops of the incubation tank and the siphoning feeding tank, and a water discharging port is formed in the bottom. A bait discharging pipe and an air supply pipeline are perpendicularly arranged in the siphoning feeding tank, air supply nozzles are arranged at the bottom of the air supply pipeline and respectively supply air to the incubation tank and the siphoning feeding tank, a siphon sleeve is sleeved with the top of the bait discharging pipe connected with the feeding end of a feeding pipeline of the culture pond, and the output end of the feeding pipeline is connected with a diffuser. The using method of the siphoning type zooplankton feed incubation and feeding system comprises the steps of incubation, feeding and cleaning. Incubation, impurity separation and feeding are integrated into one system, so that labor in zooplankton culture is saved, and feeding efficiency is increased.

The invention relates to a formula of feed for livestock, and particularly discloses a compound premix for livestock. The pecking feed part of the compound premix is prepared from the following components: barley, water, L-lysine hydrochloride, DL-methionine, ferrous sulfate, zinc sulfate, copper chloride hydroxide, manganese sulfate, sodium selenite, calcium iodate, vitamin complex for chicken, mildew preventive, magnesium sulfate, sodium bicarbonate, potassium chloride, calcium formate, calcium hydrophosphate, ethoxyquinoline, dextrin and starch. The raw materials are uniformly mixed and pressed into cake to obtain the compound premix. The compound premix has the advantages that (1) natural habits of livestock for pecking and ingesting can be met, and pickingill of chicken can be prevented; (2) the components are reasonably proportioned, the production performance of feeding chicken can be remarkably improved; (3) the ingesting time of feeding chicken can be effectively prolonged, and nutritional substances can be effectively absorbed; (4) the components in the feed cannot be layered due to proportion difference in the feeding chicken pecking process.

The invention relates to the technical field of concrete, and provides an intelligent delivery device and method for various concrete materials, wherein the intelligent delivery device includes a plurality of feeding bins, a plurality of branch conveying mechanisms, a general conveying mechanism, a plurality of decelerating motors, a plurality of material level sensors, a plurality of weighing sensors and a PLC controller. The branch conveying mechanisms are arranged under discharge ports of all the feeding bins side by side and are used for receiving and conveying materials delivered out fromthe feeding bins. The general conveying mechanism is arranged under the branch conveying mechanisms and is used for conveying the entirety of the materials of all the feeding bins conveyed by all thebranch conveying mechanisms to the next process of concrete preparation, and regulating gates of all the feeding bins and driving motors of all the decelerating motors and the general conveying mechanism driving roll cylinder are each connected with and controlled by the PLC controller. The problem that inaccurate material delivery of conventional conveying device for various concrete materials affects the quality of concrete is solved.

The invention provides limited feeding grain for laying ducks in a breeding period and a preparation method of the limited feeding grain. The limited feeding grain comprises the following raw materials in percentage by weight: 35%-50% of corn, 3%-6% of soybean meal, 4%-5% of rapeseed meal, 10%-20% of wheat middling, 8%-10% of wheat bran, 3%-5% of fermented alfalfa meal, 4%-6% of edible fungus bran, 4%-10% of bentonite, 2%-4% of stone powder and 2%-4% of a premix. The preparation method comprises the following steps: step 1, obtaining a raw material mixture with a grain size of 1.5-2.0 mm; step2, heating the raw material mixture to 80-85 DEG C and keeping the raw material mixture at the constant temperature for 25-50 s to prepare a cooked raw material mixture; and step 3, preparing granular limited feeding grain from the cooked raw material mixture by a granulator. The limited feeding grain is low in cost, the egg laying peak rises fast and high and lasts for a long time, and the preparation method is easy in parameter control and high in practicability.

A unidirectionally-energized brushless DC motor includes a disk attached to a frame, a plurality of plate-like permanent magnets disposed on the disk at equal intervals around the disk, magnetic cores fixed to the frame according to the plurality of permanent magnets, windings each of which is wound around the magnetic core and to which DC power is supplied, a predetermined number of magnetic cores fixed to the frame, and windings each of which is wound around the magnetic core and connected to a power consumption device. The permanent magnets are located such that an angle formed by a straight line passing through the center of the disk and the center of the permanent magnet and a normal line in the center of a magnetic pole plane of the permanent magnet ranges from 0° to 60°.

The invention relates to a bait for a juvenile sea cucumber in the growing period and a preparation method of the bait. The bait is prepared from the following components in weight percentage: 60% of sargassumthunbergii powder, 10% of common mussel meat powder, 4% of soybean meal, 6% of defatted fish meal, 2% of spirulina powder, 1.5% of baker's yeast powder, 0.5% of compounded mineral substance, 0.5% of multivitamin powder, 1.5% of immune polysaccharides and 14% of dry sea mud powder. In the bait for the juvenile sea cucumber in the growing period, the components are in mutualcompatibility, the contained nutritional ingredients can meet the rapid growing need of the juvenile sea cucumber, the juvenile sea cucumber then grows fast in the opening stage and grows to 2 mm from 0.5 mm averagely after being fed with the bait for 20 days, and the rate of survival is up to more than 80%.

The present invention relates to a method for preparing phagostimulant for aquaculture animals by utilizing euphausiid, and said method includes the following steps: pulverizing euphausiid, heating, self-dissolving, adding alkali, continuously ehating to make hydrolysis, solid-liquid separation, the obtained liquid is euphausiid protein solution, adding alkali intothe obtained solid euphausiid shell to make deacetylation, separating out solid chitosan, acid-dissolving chitosan to obtain chitosan colloid solution, mixing the chitosan colloid solution and the above-mentioned euphausiid protein solution, after flocculation separating precipitate and vacuum drying so as to obtain the invented product which can raise food intake of animal, raise utilization rate of bait and raise the nutrient level of bait.

The invention discloses a high-energy riser bush structure which comprises a riser bush shell. The top end of the riser bush shell is provided with a barrel, the top end of an inner cavity of the barrel is provided with a supporting base, fixed bases are installed on the left side and the right side of the top end of the inner wall of the barrel, the fixed base is connected with the supporting base through a supporting rod, the bottom end of the supporting base is provided with a cylinder body, the upper end and the lower end of the inner wall of the cylinder body are provided with an upper plug plate and a lower plug plate correspondingly, a piston plate is installed in an inner cavity of the cylinder body, the piston plate is connected with the upper plug plate through a reset spring, the bottom end of the inner wall of the barrel is provided with a baffle, the inner wall of the baffle is provided with a hollow barrel, and the upper end and the lower end of the inner wall of the hollow barrel are provided with an upper clamping base and a lower clamping base correspondingly. According to the high-energy riser bush structure, by means of the cooperation of the cylinder body, the piston plate and a sealing plate, the heat insulation effect on the riser bush shell is improved, feeding time is prolonged, and the casting appearance quality is improved.