205results about How to "Increase production cost" patented technology

The invention discloses a food conveying device with an anti-falling mechanism for food processing, and relates to the technical field of food processing.The food conveying device with the anti-falling mechanism for food processing comprises a mounting frame, a conveying assembly is arranged on the mounting frame and comprises a driving motor and a conveying belt, and the conveying belt is rotationally mounted on the inner side of the mounting frame; the driving motor fixedly penetrates the side wall, away from the conveying belt, of the mounting frame. The output end of the driving motor is fixedly connected with a driving shaft of the conveying belt. According to the food conveying device with the anti-falling mechanism for food processing, multiple sets of partition plates arranged at equal intervals are arranged on the conveying belt, dough can be separated to be conveyed, material collision is prevented, when the dough is conveyed to the end of the conveying assembly, a push block rotates, the push block applies extrusion force to the dough, the dough is extruded and pushed, and the dough is conveyed to the end of the conveying assembly. The dough can be pushed away from the conveying belt, and the situation that the dough adheres to the conveying belt and is inconvenient to fall off is prevented.

The invention discloses an intelligent production scheduling method for a long-period operation chemical device, which takes a real-time state of a production device and a predicted future health condition as one of important basis of production scheduling, combines a traditional equipment failure mechanism model with a GBDT algorithm, can predict an equipment health level at a future moment, and improves the production scheduling efficiency. Guiding the dynamic adjustment of the equipment load and the production scheduling; and then iterative optimization of the scheduling scheme is carried out by using an adaptive genetic algorithm, dynamic adaptive crossover probability and mutation probability adjustment is carried out on the scheduling scheme in the intermediate process, and the rate of convergence of the algorithm to a globally optimal solution is improved. From the aspect of application effects, the long-period operation characteristic of the large chemical device and the continuity and stability of the production process can be considered while the production efficiency and the cost are ensured, and a scientific and feasible technical implementation scheme is provided for the production scheduling of the large device of a chemical enterprise.

The invention discloses a short-process preparation method and application of a vanadyl sulfate electrolyte based on vanadium slag valence regulation and control, and belongs to the technical field of vanadium electrolytes. The method comprises the following steps: leaching the vanadium slag by using sulfuric acid to obtain a leaching solution containing low-valence vanadium; extracting vanadium and chromium in the leachate by adopting an amine organic extraction agent; carrying out reverse extraction by using sulfuric acid; the method comprises the following steps of: firstly, extracting and separating vanadium by using a phosphoric acid extracting agent, and finally, carrying out reverse extraction by using sulfuric acid to obtain the vanadium electrolyte which can be used for constructing a VFB-5kW / 10kWh vanadium battery energy storage system. The traditional established thinking that pentavalent vanadium is extracted through vanadium slag oxidation to serve as a vanadium source to prepare the vanadium electrolyte is broken through, the novel technology for extracting the low-valence vanadium solution from the vanadium slag to directly prepare the vanadium electrolyte is provided, the short-process and green novel technology for preparing the vanadium electrolyte from the vanadium slag is constructed, the efficiency of the vanadium electrolyte preparation technology is improved, and the preparation cost is reduced.

The invention discloses a preparation method of a coal-based yellow fluorescent carbon dot aqueous solution, which comprises the following steps: drying lignite to constant weight, grinding, sieving to obtain a primary coal sample, and weighing the primary coal sample; adding the weighed primary coal sample into a mixed solution of peracetic acid and hydrogen peroxide, stirring, and filtering to obtain a pretreated coal sample; the method comprises the following steps: mixing a coal sample with water, stirring to obtain a lignite solution, transferring the lignite solution into a cavitation device, starting a cavitation program, and adjusting and maintaining the flow; collecting circulating liquid in the cavitation device, and filtering to remove residual large particles to obtain an aqueous solution of the coal-based carbon dots; the method comprises the following steps: pretreating a coal sample by using a mixed solution of peracetic acid and hydrogen peroxide, and stripping the coal sample by combining a hydrodynamic cavitation method to prepare a carbon dot with yellow fluorescence; the method is low in cost, environmentally friendly, simple in equipment and huge in large-scale production potential, and a new method and thought are provided for enriching polychromaticity of the coal-based carbon dots.

The invention discloses a flash and top blowing coupled molten pool tin smelting device and method, and belongs to the technical field of pyrogenic smelting of crude tin. Tin concentrate, fuming enriched tin middling and powdery tin smoke dust are subjected to ore blending with a flux and then are smelted; adding a carbonaceous reducing agent into the molten pool, and reducing to form a CO reducing atmosphere layer at the upper part of the slag layer; and blowing fluidized bed furnace roasting dry powder to the upper part of the CO reducing atmosphere layer, carrying out flash reduction smelting on the fluidized bed furnace roasting dry powder, enabling the fluidized bed furnace roasting dry powder which is not subjected to flash reduction smelting to enter a molten pool, and continuing to carry out a reduction stage in top-blowing molten pool smelting, so that flash and top-blowing coupling is realized, and crude tin is prepared. According to the invention, flash melting pool smelting and top-blowing melting pool smelting are effectively coupled together, fuel consumption can be reduced by about 20%, and the bed capacity is obviously improved.

The invention relates to the technical field of mechanism design, and discloses a hard disk frame module and a server, the hard disk frame module comprises a hard disk frame, the hard disk frame is provided with a hinge end and a free end, the hinge end is used for being rotatably connected with the side wall of a case, and the hard disk frame has a first state in which the free end is turned up relative to the case; in the second state, the free end is arranged in the case; the handle is rotatably arranged at the free end of the hard disk frame, the handle is provided with a first abutting part, the bottom wall of the case and / or the hard disk frame module further comprises a bottom support, and when the first abutting part abuts against the bottom support, the hard disk frame is in a first state. According to the hard disk frame module provided by the embodiment of the invention, devices such as a cable, a plug-in card and a radiator below the hard disk frame module can be maintained under the condition that the hard disk frame does not need to be disassembled, and the defect that in the related technology, the hard disk frame can only be overturned within a small angle range and cannot be overturned can be overcome. And an operator cannot conveniently maintain components such as a mainboard at the bottom of the hard disk frame.

The invention discloses a sliding door locking structure and a sliding door mechanism, the sliding door locking structure comprises a lock box, the lock box comprises a lock box assembly part and a lock groove, and the lock box assembly part is used for being assembled with an upper rail; the vertical frame is provided with a sliding rail in the length direction of the vertical frame, and the vertical frame is used for being assembled with the side edge of the door body; the lock rod is arranged in the sliding rail in a sliding mode, one end of the lock rod is used for being connected with the lock groove in a matched and inserted mode, and the other end of the lock rod is in linkage with a handle of a door body so that the lock rod can stretch into or be separated from the lock groove. A lock hole or a lock tongue does not need to be arranged on the side edge of the door body, key components such as the lock box and the lock rod are hidden in the upper rail and the vertical frame, exposure of the lock is reduced, the safety of the door body is improved, meanwhile, the structure of the lock is simplified, the production efficiency is improved, and the production cost is reduced.

The utility model relates to the technical field of textile dyeing, and discloses a high-color-fastness yarn dyeing device which comprises a supporting plate, a bottom plate is fixedly connected to the upper surface of the supporting plate, a partition plate is fixedly connected to the upper surface of the bottom plate, a top plate is fixedly connected to the upper surface of the partition plate, and a first motor is arranged on the upper surface of the top plate. According to the high-color-fastness yarn dyeing device, by arranging the containing pipe and the yarn cylinder, dye can flow out of yarn, by arranging the stirrer, the dye can be evenly mixed with the yarn, and the effects that dip dyeing and coloring can be conducted on the yarn from the interior of the yarn, the yarn is evenly colored, and the color fastness of the yarn is improved are achieved; the problems of uneven coloring, low color fastness and the like in the dip dyeing process of common dyeing equipment are solved, and the problems that if the dip dyeing time is prolonged and the dye concentration is increased to improve the dyeing effect, the production cost is increased, and the environment is possibly polluted are solved.

The invention provides a method for eliminating delta ferrite in austenitic stainless steel and the austenitic stainless steel, and belongs to the technical field of metal materials. The method comprises the following steps that an austenitic stainless steel ingot containing the delta ferrite is subjected to heat preservation for first set time at the first set temperature for first heat treatment; heating the austenitic stainless steel ingot subjected to the first heat treatment to a second set temperature, and carrying out heat preservation for a second set time at the second set temperature for second heat treatment; and cooling the austenitic stainless steel ingot subjected to the second heat treatment, or sequentially and repeatedly carrying out the first heat treatment and the second heat treatment on the austenitic stainless steel ingot subjected to the second heat treatment for at least one time, and then cooling to obtain the austenitic stainless steel subjected to delta ferrite elimination. The first heat treatment and the second heat treatment are performed, and the second set time is limited, so that the austenitic stainless steel is prevented from being in a high-temperature environment for a long time, and austenite grains are prevented from obviously growing.

The invention discloses a method for preventing steel for producing pure iron by a pusher-type heating furnace from generating cracks. The method comprises the following steps: changing a charging and discharging mode and ensuring in-furnace time; improving a heating process; the special roller is specially used; bending is controlled, and perpendicularity is improved. According to the production method for eliminating the defects of the industrial pure iron flat steel rolled by the double furnaces, the defects of the pure iron rolled by the double furnaces are eliminated, double-furnace production is carried out by adopting the pusher furnace and the stepping furnace at the same time, the yield and the product physical quality are improved, the yield is increased, the efficiency is increased, and meanwhile the product quality percent of pass reaches 97% or above.

The preparation method comprises the following steps: uniformly stirring steel slag and tailings according to a mass ratio of (2-3): (7-8) at a high speed, adding water, continuously stirring to obtain a turbid solution, slowly adding sodium silicate into the turbid solution under high-speed stirring to obtain a mixed solution, simultaneously dropwise adding a water reducing agent and a thickening agent into the mixed solution under stirring, and uniformly stirring to obtain a slurry; and finally, carrying out a slump test on the mixture, and determining the addition amount of silica gel or water according to a test result, so as to obtain the flow-state solidified soil based on the large-particle waste residues. According to the method, through the innovative material ratio and preparation process, the stirring and pumping performance of the large-particle material is improved, the segregation risk is reduced, the homogeneity and stability of the fluid-state solidified soil are improved, meanwhile, the production cost is reduced, batch consumption of a large amount of solid waste is achieved, and the problem that use of the large-particle material in traditional fluid-state solidified soil is limited is solved.

The utility model provides an edge sealing structure of a packaging bag making machine, which relates to the technical field of packaging bag manufacturing and processing and comprises an operation table, a motor is arranged on one side of the top wall of the operation table, a right-hand and left-hand thread screw rod is arranged at the output end of the motor, and two movable plates are in threaded connection with one side of the surface wall of the right-hand and left-hand thread screw rod. Two supporting plates are fixedly connected to one side of the top wall of the operation table, sliding rods are fixedly connected to one sides of the surface walls of the two supporting plates, the sliding rods are slidably connected with the two movable plates, and the right-hand and left-hand threaded lead screw is rotatably connected with the two supporting plates and is driven to rotate through rotation of the output end of the motor. The right-hand and left-hand thread lead screw rotates to drive the movable plate to move on the first sliding groove, then the packaging bag is driven to be centered under the action of the extending plate, and the problems that due to the fact that thin film materials deviate in the sealing process, sealing lines are irregular, the sealing missing phenomenon occurs, the sealing performance and attractiveness of the packaging bag are affected, and the production cost of the packaging bag is increased are avoided.

The invention discloses a recovery method for extracting lithium, copper and aluminum from waste lithium iron phosphate batteries. First, waste lithium iron phosphate batteries are pretreated to obtain a mixture of positive and negative electrode sheets in a flaky state, and then the electrode sheet mixture is leached with a trivalent iron salt solution as a leaching agent, and a lithium-containing leachate and ferrophosphorus slag including copper and aluminum current collectors are filtered. The lithium-containing leachate is oxidized and pH adjusted, and then filtered and separated to obtain a lithium-containing purified liquid and iron hydroxide precipitate. The lithium-containing leachate is further adjusted to a high pH value to remove impurities, and then a saturated sodium carbonate solution is added to precipitate and crystallize to obtain lithium carbonate; the iron hydroxide precipitate is dissolved with dilute acid to prepare a trivalent iron salt solution, which is circulated for the leaching agent. The ferrophosphorus slag including copper and aluminum current collectors is separated by a hydrodynamic screening device to obtain a copper and aluminum current collector mixture and ferrophosphorus slag, and the former is dried and ground and separated by a specific gravity separator to obtain copper powder and aluminum powder. The invention shortens the process flow, and the project investment and production costs are relatively low, and is suitable for large-scale recycling and treatment of waste lithium iron phosphate batteries.

The invention relates to a blade cell variable-pitch grabbing mechanism which comprises a supporting frame and two symmetrically-arranged variable-pitch clamping jaw units, and the supporting frame is used for being connected with a mechanical arm; the variable-pitch clamping jaw unit comprises a power source, a first connecting plate, a first-stage variable-pitch clamping jaw assembly, a second-stage variable-pitch clamping jaw assembly, a third-stage variable-pitch clamping jaw assembly and a fourth-stage variable-pitch clamping jaw assembly. According to the blade battery cell variable-pitch grabbing mechanism, when the telescopic rod of the driving source stretches out or retracts back, the first-stage variable-pitch clamping jaw assembly, the second-stage variable-pitch clamping jaw assembly, the third-stage variable-pitch clamping jaw assembly and the fourth-stage variable-pitch clamping jaw assembly can be driven to be unfolded step by step, so that the distance between battery cell clamping jaws is the same as the distance between products on a plastic tray; after the battery cell clamping jaw descends in place, the battery cell clamping jaw clamps the battery cell, so that the battery cell is grabbed; the variable-pitch grabbing mechanism is simple in structure, only two air cylinders are used for driving the variable-pitch grabbing mechanism, the pitch of eight independent battery cells is changed at the same time, the equipment cost is saved, and the production efficiency and the production cost are improved.

The invention relates to vibrating diaphragm direct welding equipment and a vibrating diaphragm direct welding method for a moving coil and flat plate combined earphone. The equipment comprises a solder smearing mechanism, an image positioning mechanism, a laser source, a galvanometer mechanism, a spraying mechanism, a displacement mechanism, a controller and other key components. In the welding process, the device accurately recognizes the position of the metal ring through the image positioning mechanism, laser welding of a welding hole in the metal ring and laser cutting of a vibrating diaphragm base material outside the metal ring are achieved at the same time in one-circle scanning through the laser source and the galvanometer mechanism, and the size of the cut metal ring is equal to that of the vibrating diaphragm base material; complex steps and errors caused by independent positioning of the vibrating diaphragm in the prior art are avoided. The high-precision processing capability of the equipment ensures the precision and consistency of diaphragm manufacturing, and the production efficiency and the product quality are improved.

The application provides a preparation method of a diphenylfluorene polyether. The method uses diphenylfluorene as a substrate, butylene oxide as an epoxide monomer, toluene as an organic solvent, and under the action of a composite catalyst, reacts at 110-200 DEG C for 2-6 hours to obtain the diphenylfluorene polyether. The composite catalyst is obtained by reacting a porous aromatic skeleton with a bromoalkyl quaternary ammonium salt to obtain a quaternary ammonium salt functionalized porous aromatic skeleton, and finally, a basic catalyst is limitedly encapsulated in the pore channel of the quaternary ammonium salt functionalized porous aromatic skeleton by electrostatic attraction. The catalyst of the method can be recycled and reused, and the yield retention rate is greater than or equal to 92% after the composite catalyst is used for 5 cycles, and the method is suitable for optical display, high-frequency circuit board, semiconductor packaging and other fields.

The utility model relates to the technical field of automation, in particular to a clamping device and clamping equipment, which comprise a fixed seat and a clamping jaw mechanism, a rotating shaft is arranged on the fixed seat and penetrates through the fixed seat; the two clamping jaw mechanisms are arranged on the two sides of the fixing base in the axial direction of the rotating shaft correspondingly. The clamping jaw mechanism comprises a first clamping jaw, a second clamping jaw, a first transmission part, a second transmission part and a third transmission part; the first clamping jaw and the second clamping jaw are oppositely arranged on the two radial sides of the rotating shaft and are both slidably connected with the fixing base, and the sliding directions of the first clamping jaw and the second clamping jaw face the rotating shaft. The first transmission part is rotationally connected with the rotating shaft and comprises a first end and a second end; one end of the second transmission part is rotationally connected with the first clamping jaw, and the other end is rotationally connected with the first end; one end of the third transmission part is rotationally connected with the second clamping jaw, and the other end is rotationally connected with the second end; the first clamping jaw moves and drives the second clamping jaw to be relatively close to or away from the rotating shaft. The centering device is high in centering precision and does not damage materials.

The utility model discloses an integrated coffee machine capsule box which is characterized in that the integrated coffee machine capsule box comprises a capsule box body, a material containing opening is formed in the upper portion of the capsule box body, a hanging ring is fixed to the material containing opening in a surrounding mode, and a first outflow hole is formed in the middle of the lower portion of the capsule box body; a plurality of second outflow holes are formed in the bottom of the capsule box body and surround the first outflow hole at intervals, a puncture needle is fixed to each second outflow hole, compared with the prior art, the production cost of the capsule coffee machine can be reduced, the size of the capsule coffee machine can be reduced, meanwhile, the capsule box and the puncture needles are integrated, and the manufacturing cost is reduced.

The invention provides a preparation method of a front local passivation contact solar cell, and belongs to the technical field of solar photovoltaics. The preparation method comprises the following steps: providing a silicon substrate; preparing a tunneling layer on the front surface of the silicon substrate; preparing an amorphous silicon layer on the tunneling layer; performing first heat treatment on the target part; removing a non-target part region to obtain a local passivation contact structure on the front surface of the silicon substrate; and preparing the solar cell by using the local passivation contact structure on the front surface of the silicon substrate, namely the front surface local passivation contact solar cell. And fluorine-containing gas etching is adopted, so that the process can be simplified.

The utility model provides an injection molding device with an object rapid heat dissipation function, and relates to the technical field of injection molding devices, the injection molding device comprises a bottom frame, a top frame, a hydraulic cylinder, an upper mold and a lower mold, and the side surface of the upper mold is fixedly provided with a guide sleeve. Through the arrangement of the bottom frame, the top frame, the hydraulic cylinder, the upper mold, the lower mold, a guide sleeve, a guide rod, a water tank, a refrigeration piece, a water pump, a connecting pipe, a circulating pipe, a machine frame, a first rotating shaft, a second rotating shaft, fan blades, a first belt wheel, a second belt wheel, a belt, a motor, a positioning sleeve, a spring A and a positioning rod, rapid heat dissipation of an injection molding part can be achieved; through water cooling and air cooling, the injection molding device can achieve the rapid, uniform and efficient heat dissipation effect, so that the injection molding process is optimized, the product quality is improved, meanwhile, the upper mold can be guided in the injection molding process, it is ensured that closing and opening of the upper mold are stable and accurate, and therefore the production efficiency is remarkably improved.

The utility model relates to a kind of kink manipulator, belong to mechanical equipment technical field, kink manipulator includes drive assembly, transmission assembly and torsion clamping assembly;The linear stroke of first arc guide slot in transmission assembly one end is less than the linear stroke of second arc guide slot;Torsion clamping assembly includes pivot, main shaft, mechanical claw and rack;Drive assembly rotates main shaft by transmission assembly;Pivot one end is connected with first arc guide slot by connecting piece, and the other end passes through main shaft and is coaxially connected with rack;Main shaft one end is connected with second arc guide slot by connecting piece, and the other end installs the fixed part of mechanical claw;Two pincers of mechanical claw are symmetrically engaged connection with the two sides of rack;Two pincers are rotated by rack and drive pivot rotation when rotating;Two pincers are realized clamping, opening by engagement transmission when pivot and main shaft telescopic movement.This utility model is high in repeat positioning accuracy, clamping force is controllable, avoid product deformation or breakage, packaging film has no loose, wrinkle phenomenon.

The utility model provides an automobile door adjusting tool manipulator, which belongs to the technical field of automobile door installation and comprises a frame weldment, a control box is arranged on one side of the back of the frame weldment, and a side wall upper support component, a side wall rear positioning pin and an automobile door positioning and clamping mechanism are arranged on the frame weldment. The automobile door positioning and clamping mechanism comprises an automobile door holding and clamping assembly, two gap adjusting assemblies and a hinge limiting assembly, the automobile door can be quickly aligned to an automobile door frame in the process of installing an automobile door on a white automobile body, the gap between the automobile door and the automobile body and the surface difference are met, the precision and the installation efficiency are effectively improved, and the installation cost is reduced. The positioning strategy is optimized, the installation position does not need to be adjusted for many times, and labor intensity is reduced.

The invention relates to the technical field of drying, and particularly discloses a floating bead dehydration treatment device which comprises a drying box, a top cover is clamped to the inner wall of the top end of the drying box, a dehydration assembly is arranged in an inner cavity of the drying box, a second fixing ring is fixedly installed on the inner wall of the drying box, and an anti-explosion assembly is arranged in the inner cavity of the drying box. The floating beads can be scattered when being dried through the dewatering assembly, namely, the floating beads shake up and down and left and right during drying, so that particles which are originally tightly stacked are dispersed, the contact area of raw materials and a drying medium is increased, more uniform heat distribution is achieved, the drying efficiency is improved, meanwhile, the ventilation mechanism can jack up and ventilate the internal raw materials, and the drying efficiency is improved. And the explosion-proof assembly can give an alarm in time when the pressure intensity in the drying equipment is increased, the pressure intensity in the equipment can be automatically balanced when the pressure intensity is increased, and the equipment is prevented from exploding.

The invention discloses a device and a method for implanting a column for a CCGA device, relates to the technical field of electronic packaging, is used for welding a micro-spring on a bonding pad of a substrate, and comprises a positioning base and a positioning plate, the top of the positioning base is provided with a positioning groove used for positioning the base plate, and guide columns are arranged on the two sides, corresponding to the positioning groove, of the positioning base. Guide holes correspondingly matched with the two guide columns are formed in the bottom of the positioning plate, a plurality of positioning needles used for positioning the micro-spring are arranged at the position, corresponding to the position between the two guide holes, of the positioning plate in an array mode, and the diameter of a needle body at the end, connected with the positioning plate, of each positioning needle is not smaller than the inner diameter of the micro-spring; the bottom of the positioning plate is provided with a separating plate for separating the micro-spring from the positioning needle; the plate surface of the separating plate is provided with openings corresponding to the positioning needle and the guide post; according to the invention, the micro-spring is tightly inserted into the positioning pin, and the position of the micro-spring is determined through the positioning pin, so that the tolerance between the micro-spring and the corresponding bonding pad of the substrate is less than 0.01 mm.

The present invention discloses a smart wrench and tightening control method based on the torque angle method, including a microcontroller, a torque measurement module electrically connected to the microcontroller, an angle measurement module, a memory and a working power supply; the torque measurement module is used to measure the torque of the smart wrench, the angle measurement module adopts an inertial sensor, and is used to measure the deflection angle of the smart wrench. The inertial sensor includes a gyroscope, an accelerometer and a magnetometer, and the microcontroller adopts the torque angle method to control the tightening of the smart wrench. The present invention does not use the conventional method of solving the angle attitude of the quaternion of the inertial device, but only reduces the tedious calculation and performs attitude solution by establishing a wrench coordinate system based on the torque wrench, and has the characteristics of high calculation efficiency, high precision, low cost, low power consumption and long battery life.

The refrigerant system comprises a compressor, a first heat exchanger, a second heat exchanger and a four-way reversing valve, the first heat exchanger and the second heat exchanger are communicated with the compressor, the first heat exchanger comprises a first heat exchange part and a second heat exchange part, the first end of the second heat exchange part is communicated with an exhaust port, and the compressor is provided with the exhaust port and an air return port. A first connector of the four-way reversing valve communicates with the first end of the first heat exchange part, a second connector of the four-way reversing valve communicates with the second end of the second heat exchanger, a third connector of the four-way reversing valve communicates with the exhaust port, and a fourth connector of the four-way reversing valve communicates with the air return port. The first end of the second heat exchanger communicates with the second end of the first heat exchange part and the second end of the second heat exchange part. According to the technical scheme, the refrigerant system can be defrosted under the condition that the compressor is not shut down, so that continuous heat supply is kept, and indoor comfort is improved.

The invention relates to a cartridge assembly. The cartridge assembly includes a paper bottom cartridge, a paper floss reel, and a cover member. The paper bottom box comprises a first containing cavity. The paper dental floss reel is arranged in the first containing cavity. The cover component comprises a paper upper support, a paper cover body and a wire cutter. At least part of the paper upper support is located in the first containing cavity. The paper upper support and the paper bottom box are detachably connected only in a friction fit mode. The paper upper support comprises a second containing cavity and a wire outlet opening. And the paper cover body is hinged with the paper upper support. The paper cover body is turned over relative to the paper upper support so as to be switched between the opening position and the covering position. And the wire cutter is arranged on the paper cover body. When the paper cover body is in the covering position, the paper cover body covers the second containing cavity and the wire outlet opening, and the wire cutter and at least part of the paper cover body are located in the second containing cavity. The paper cover body and the paper upper support are connected only in a friction fit mode. And when the paper cover body is at the opening position, the wire outlet opening and the wire cutter are in an exposed state.

The invention provides a preparation method of gemcitabine hydrochloride, and belongs to the technical field of medicine synthesis. The preparation method of gemcitabine hydrochloride comprises the following steps: firstly, carrying out condensation reaction on a compound in a formula I and protected cytosine II to obtain a gemcitabine hydrochloride compound III; the method comprises the following steps: synthesizing a gemcitabine hydrochloride compound III (alpha / beta configuration mixture), splitting the synthesized gemcitabine hydrochloride compound III (alpha / beta configuration mixture), and carrying out configuration conversion on a key compound III (alpha / beta configuration mixture) in a splitting mother solution by adopting a continuous flow technology to realize recovery of an alpha configuration product, so that the purity and yield of the gemcitabine hydrochloride compound III beta are improved, and the method is suitable for industrial production. And thus, high-quality gemcitabine hydrochloride is obtained. The purity of the key compound is improved through resolution and configuration transformation, and the purity reaches 99.2% after resolution. The gemcitabine hydrochloride is prepared from the high-purity key compound III, so that the product purity is high; the product loss is reduced, and the product yield is improved.

The application relates to the technical field of metal molds, in particular to a stamping type manufacturing metal mold which comprises a mold base, a female die, guide columns, an upper mold base and a male die, wherein the female die is fixedly installed on the top wall of the lower mold base, a plurality of guide columns are connected to the four corners of the top wall of the lower mold base, the top portions of the guide columns are jointly connected with the upper mold base, the male die is installed on the bottom of the upper mold base, the male die is movably matched with the female die through the up-down movement of the upper mold base, and the male die is internally provided with a lubricating device for accurately supplying lubricating oil to the mold processing position. The lubricating device accurately supplies lubricating oil to the mold processing position, not only saving the use amount of the lubricating oil, but also improving the cooling and lubricating effect in cold forging stamping, avoiding the influence of the splashing of the lubricating oil on the normal work of other equipment, and reducing the production cost without the need of additionally installing other equipment.

The invention discloses a doped nickel oxide-based material, a preparation method and application thereof, and a synthetic method of the doped nickel oxide-based material, and the synthetic method comprises the following steps: adding a nickel salt and an iron salt into an ethanol and oleylamine solution, fully stirring, transferring the solution into a reaction kettle for heating reaction, then carrying out centrifugal analysis and washing, and then calcining to obtain the doped nickel oxide-based material. And heating the obtained powder and thiourea in a tubular furnace to finally obtain the doped nickel oxide-based material. The synthesis method is mild in reaction condition and easy to operate, the electron and structural properties of nickel oxide are changed through doped metal iron and non-metal sulfur atoms, the conductivity of the system is improved, then the doped nickel oxide-based material can efficiently electrolyze water under the alkaline condition, and the method can be applied to an anode material of alkaline electrolyzed water.