24results about How to "Increase exchange rate" patented technology

The invention relates to the field of high polymer materials, and discloses a visible light repairing type waterborne polyurethane emulsion and a preparation method thereof.The preparation method comprises the following steps that polytetrahydrofuran, isophorone diisocyanate, 2, 2-dimethylolpropionic acid and butyltin dilaurate are taken and placed in a reactor, pre-polymerization chain extension is conducted at the temperature of 60-90 DEG C, and a polyurethane prepolymer is obtained; the preparation method comprises the following steps: firstly, adding ASB-PEG2000-ASB, carrying out chain extension at 40-60 DEG C, then adding butanediol and carbohydrazide, continuously carrying out chain extension, then adding glucose, carrying out crosslinking at 40-60 DEG C, finally cooling to 25-50 DEG C, adding triethylamine, carrying out stirring to form a salt, adding deionized water, carrying out stirring dispersion, and carrying out emulsification so as to prepare the visible light repairing type waterborne polyurethane emulsion. The water-based polyurethane emulsion has the advantages that the water-based polyurethane emulsion has wide absorption in the visible light wave band, the self-repairing efficiency is high, the water-based polyurethane emulsion and polytetrahydrofuran are simultaneously used as soft segments to be introduced into water-based polyurethane, and the prepared water-based polyurethane emulsion has high mechanical performance and a visible light induced self-repairing function.

The utility model belongs to the field of protection equipment, and particularly relates to protection equipment for an instrument valve group, which solves the problem of how to facilitate the use of the instrument valve group on the premise of ensuring the protection effect in the prior art, and comprises a protection box, and an instrument valve group body is arranged in the protection box. Through mutual cooperation of the wiping mechanism, the heat dissipation mechanism and the transmission mechanism, when a servo motor is driven to work, a first fan and a second fan can rotate at the same time to generate wind power, the speed of air exchange between the interior and the exterior of the protection box is increased, the instrument valve bank body is prevented from working in a high-temperature environment, and the service life of the instrument valve bank body is prolonged. And when the servo motor is started, a reciprocating lead screw can be driven to rotate, when the reciprocating lead screw rotates, a cleaning block in threaded connection with the surface of the reciprocating lead screw can reciprocate, the surface of the observation window can be continuously wiped and cleaned through cleaning soft bristles on the surface of the cleaning block, and a large amount of dust is prevented from being accumulated on the surface of the observation window.

The utility model discloses a repair bar setting device, which comprises an MCU (Microprogrammed Control Unit) main control circuit used as a main processing center of equipment; the display circuit is used for displaying key information generated by man-machine interaction or interaction between equipment; the repair bar equipment interface circuit is used for communicating and connecting with external repair bar equipment; the data storage circuit is used for storing related setting parameter data; the key and buzzer circuit is used for realizing man-machine interaction operation and providing operation feedback; and the power management circuit is used for managing power supply and battery charging of the equipment. According to the repair bar setting device, by simulating a battery form and enhancing a setting interface, the operation convenience and practicability are remarkably improved, the maintenance cost of a mobile phone is reduced, man-machine interaction is optimized by integrating a display screen and functional keys, the setting efficiency is improved, the programmability of the MCU main control circuit provides flexibility for equipment customization, and the repair bar setting device is suitable for popularization and application. Therefore, the mobile phone maintenance tool is economical and efficient.

The present invention relates to a vermiculite nanosheet composite film and a preparation method thereof, wherein the film comprises a functional layer and a composite layer, wherein the functional layer comprises vermiculite nanosheets, carbon nanotubes and rare earth metal oxide nano-slurry, and the composite layer comprises a polymer electrolyte, a polyhydroxy organic acid and a water-absorbing inorganic salt. Compared with the prior art, the present invention has higher stability and ion migration rate, thereby increasing the rate of entry and exit of molecules in the film.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for preparing dihydroxybutanediol terephthalate under catalysis of an ionic liquid. Wherein the ionic liquid takes 1-butyl-3-methylimidazole tosilate or 1-butyl sulfonic acid-3-methylimidazole trifluoromethane sulfonate as a raw material, tetrabutyl titanate and the ionic liquid are taken as catalysts, and ester exchange reaction is carried out, so that the dihydroxybutanediol terephthalate is prepared. According to the method, the ionic liquid is added as a catalyst, the ester exchange rate of the ester exchange reaction is increased and can reach 98%, generation of by-products is remarkably reduced, and the method is mild in reaction condition, low in requirement for equipment, easy to operate and suitable for industrial large-scale production.

This utility model relates to the field of automotive parts technology, specifically an automotive brake disc, including an outer disc body and an inner disc body disposed on the back of the outer disc body. A connecting member is disposed between the outer disc body and the inner disc body. The outer disc body has several first heat dissipation holes, which are connected to the interior of a heat dissipation cavity. This automotive brake disc, through the coordinated use of the outer disc body, inner disc body, heat dissipation cavity, connecting member, first heat dissipation holes, mounting part, mounting hole, and second heat dissipation holes, allows for rapid heat generation due to friction between the brake disc and brake pads during braking. The heat dissipation grooves, first heat dissipation holes, and second heat dissipation holes on the surfaces of the outer and inner disc bodies, with their unique structure and layout, guide air to form a complex airflow when the brake disc rotates, increasing the contact time and area between the air and the brake disc surface, significantly improving heat exchange efficiency and enhancing heat dissipation performance. Furthermore, the heat dissipation grooves increase the effective heat dissipation area of ​​the brake disc.

The application provides a cation exchange membrane and a preparation method and application thereof, and belongs to the technical field of cation exchange membranes.The method provided by the application is free of volatile organic compounds, toxic and harmful monomers or heavy metal components, and the raw material itself is environmentally friendly.The method is free of harmful gas emission and hazardous waste generation, and is environmentally friendly.The cation exchange membrane material prepared by the method is chemically stable, easy to recycle after being discarded, free of additive precipitation during use, and free of pollution to the treatment system.The water-soluble dispersion bonding medium adopted by the application forms rich and uniform connected pore structures in the cation exchange membrane after being washed by water, greatly reduces ion migration resistance, significantly alleviates membrane polarization, and improves ion exchange rate and energy utilization efficiency when used for separation.The method provided by the application is free of complex chemical reactions, harsh process conditions, and standardized operation steps, and is easy to realize large-scale continuous production.

The present invention discloses a computer self-cooling case, and relates to the technical field of cases. The present invention comprises a case, and air inlets are arranged on both sides of the case, a mainboard chamber is arranged on the bottom of the inner wall of the case, circuit components are arranged on both sides of the mainboard chamber, a limit frame is fixedly installed on the top of the mainboard chamber, a cooling water pump is fixedly installed at the corner of the inner wall of the limit frame, and the bottom of the cooling water pump is fixedly installed at the top edge of the mainboard chamber, a circular pipe is fixed and connected to the back of the cooling water pump, and the bottom of the circular pipe is in contact with the top of the mainboard chamber, and a cooling fan is slidably installed on the inner wall of the limit frame. The present invention performs a large-scale cooling treatment on the mainboard chamber, and also uses a cooling fan to cause the cooling water source inside the circular pipe to continue to maintain low-temperature circulation, so as to prevent the internal parts of the case from continuously heating up during the operation of the equipment, resulting in the weakness of water cooling heat dissipation, and to prevent the heat dissipation effect from gradually decreasing, causing the equipment to have a frequency reduction phenomenon.

The utility model relates to the technical field of shoes, and provides a waterproof vamp which comprises a vamp body, the vamp body comprises an inner layer, a breathable layer and an outer layer which are sequentially arranged from inside to outside, and the surface of the outer layer is coated with a waterproof coating; the breathable layer is made of sponge materials, and a plurality of elastic reset pieces are embedded in the breathable layer. According to the vamp, the waterproof performance of a shoe is improved, and meanwhile the air permeability of the shoe is improved. The utility model further provides a shoe.

The utility model discloses a plateau motor, which belongs to the technical field of motors and comprises a motor outer shell, a mounting cover is arranged on one side of the motor outer shell, and a plurality of mounting assemblies are arranged on the peripheral side of the mounting cover. According to the utility model, the sliding plate drives the liquid bag to periodically expand or contract, so that cold water in the water tank enters the guide pipe through the connecting pipe, the communicating pipe and the inner ring, the cold water takes away heat of the guide pipe and the heat conduction fins, and the cold water realizes cooling circulation of water flow through the connecting ring, the circulating pipe and the cooling discharge box, thereby realizing heat dissipation of the interior of the motor; when the load of the motor is larger, the heat generated by the outer shell of the motor is larger, the rotating speed of the output shaft is higher, at the moment, the rotating speed transmitted to the cam by the output shaft is higher, the acting efficiency of the cam matched with the sliding plate on the liquid bag is increased, and the one-way flowing speed of water flow can be increased, so that the heat exchange rate is increased, and the heat dissipation effect is improved. Therefore, the heat dissipation assembly can meet the heat dissipation requirements of motors under different powers.

The utility model relates to substation technical field provides a small prefabricated substation with reinforcing structure, including bottom plate, embeds the hardened ground, be provided with air cavity in the bottom plate, is set up with a plurality of storage holes on the outside wall of bottom plate, is slidably installed with fastening unit in the storage hole, the upside of bottom plate is provided with a plurality of gas outlets, is provided with pressure limiting valve for maintaining the pressure intensity in air cavity in the gas outlet, the outer box body is set up on the bottom plate, the outer box body has the inner chamber of bottom opening, the outer wall of box body is provided with air inlet, is provided with filter plate at air inlet, the air injection spare is set up in the inner chamber, and the air in outer box body is drawn into the air cavity, and the fastening unit is under the pressure of air pressure and is in abutment with the hardened ground. The setting of pressure limiting valve makes the high pressure environment in air cavity, and the stable connection of bottom plate and hard ground is realized through high pressure air to push the piston positioning rod, and the wind resistance of prefabricated substation is effectively improved.

The invention relates to the technical field of cement clinker production and CO2 capture, and particularly discloses a process and equipment for graded calcination and CO2 capture of semi-dry cement clinker, and the process combines the technology of preparing tricalcium silicate through semi-suspension preheating in a rotary kiln, light roasting of dicalcium silicate, synchronous and direct capture of high-concentration or high-purity CO2 and oxygen-enriched calcination. After being specifically treated, raw material powder enters a self-gravity dispersion type semi-suspended raw material preheating three-blade rotary kiln to be preheated, and then enters a closed electric heating three-blade rotary kiln capable of capturing CO2 and light burning dicalcium silicate. By controlling the electric heating condition, the uniform cross solid-phase reaction is realized, and CO2 is captured. The process solves the problem caused by material layering of a conventional novel dry-method preheater, reduces the loss of powdery materials, and effectively controls the ratio of raw materials to clinker. Meanwhile, high-concentration CO2 can be directly captured, and compared with other technologies, the investment is saved, the operation cost is reduced, the energy-saving and emission-reducing effects are remarkable, and the operation is simple.

An air-cooled water chiller for temperature control of semiconductor production equipment comprises a water chiller body, a temperature sensor, a cooling water tank and a water pump, the water chiller body is formed by assembling a shell, a compressor, a finned heat exchanger, a heat dissipation device, a drying filter, an expansion valve and a water tank type evaporator, and the cooling water tank is arranged on one side of the shell; a temperature controller is arranged on the cooling water tank, a temperature sensor is arranged in the cooling water tank, an air outlet of the compressor is communicated with an air inlet of the finned heat exchanger through a pipeline, a heat dissipation device is arranged at the bottom end of the finned heat exchanger, and a water outlet of the finned heat exchanger is communicated with a water inlet of the drying filter through a pipeline. A water outlet of the drying filter is communicated with a water inlet of the water tank type evaporator, and an expansion valve is arranged on a pipeline between the drying filter and the water tank type evaporator. The temperature sensor is arranged in the water tank, the temperature of cooling water can be detected in real time, and the running power of the heat dissipation device is adjusted according to the temperature.

The invention discloses a TEC-driven phase change material heat storage and release experimental device, comprising: two experimental modules, two groups of temperature control modules and a data acquisition unit, wherein the two experimental modules are arranged in the same experimental box, and different TEC-driven phase change materials are filled inside respectively; the two groups of temperature control modules are arranged corresponding to the two experimental modules, and the data acquisition unit comprises two thermocouples and a data acquisition instrument, and the two thermocouples are respectively arranged inside the outer shells of the two experimental modules. The invention utilizes different temperature curves of different phase change materials in the phase change process, collects the temperature changes of the phase change materials in the two experimental modules in the whole phase change process in real time through the thermocouples, and then receives and draws the temperature curves of the phase change materials corresponding to the two experimental modules in the phase change process by the data acquisition instrument, thereby evaluating the performance and application potential of the phase change material according to key parameters such as the phase change temperature, the phase change latent heat, and the cyclicity of the phase change material.

This invention belongs to the field of photocatalysis technology, specifically relating to a microbial-MOF photosensitizing material, its preparation method, and its application. The microbial-MOF photosensitizing material comprises antibiotic-degrading bacteria and a metal-organic framework shell encapsulating the surface of the antibiotic-degrading bacteria. The metal-organic framework in the microbial-MOF photosensitizing material provided by this invention has a porous structure, enabling the encapsulated microorganisms to receive sufficient light, enhancing light absorption capacity, and facilitating rapid carrier migration. Ultimately, this gives the microbial-MOF photosensitizing material superior photoelectrocatalytic activity, lowers the photoelectrocatalytic reaction energy barrier, and increases the kinetics of antibiotic degradation.

The present invention discloses a computer self-cooling case, and relates to the technical field of cases. The present invention comprises a case, and air inlets are arranged on both sides of the case, a mainboard chamber is arranged on the bottom of the inner wall of the case, circuit components are arranged on both sides of the mainboard chamber, a limit frame is fixedly installed on the top of the mainboard chamber, a cooling water pump is fixedly installed at the corner of the inner wall of the limit frame, and the bottom of the cooling water pump is fixedly installed at the top edge of the mainboard chamber, a circular pipe is fixed and connected to the back of the cooling water pump, and the bottom of the circular pipe is in contact with the top of the mainboard chamber, and a cooling fan is slidably installed on the inner wall of the limit frame. The present invention performs a large-scale cooling treatment on the mainboard chamber, and also uses a cooling fan to cause the cooling water source inside the circular pipe to continue to maintain low-temperature circulation, so as to prevent the internal parts of the case from continuously heating up during the operation of the equipment, resulting in the weakness of water cooling heat dissipation, and to prevent the heat dissipation effect from gradually decreasing, causing the equipment to have a frequency reduction phenomenon.

The present application provides a kind of narrow molecular weight distribution PVP copolymer and its preparation method and application, the PVP copolymer has the structure shown in formula I, in the present application, NVP monomer is copolymerized with allyl polyoxyethylene ether in redox system, then hydroxyl end group is sulfonated and handled by adding sulfonating agent to the copolymer reaction solution obtained, to obtain the PVP copolymer.The chain transfer effect of allyl polyether is utilized in the present application, the molecular weight distribution of PVP copolymer is effectively controlled, and the ionized end group treatment of strong polarity is carried out, the chain segment uniformity of PVP copolymer is improved, the space steric hindrance of polyether branch, the charge repulsion of ionic group significantly improve the fullness of chain extension of PVP in casting solution, to improve the exchange rate of casting solvent and precipitator, obtain the membrane pore structure of uniform pore size, high pore size rate, stable structure.

This invention provides a polyurethane / chitosan composite porous fiber and its spinning method. A polyurethane solution and a chitosan solution of specific concentrations are prepared, and a coaxial wet spinning technique is employed. The outer axis is the polyurethane solution, and the inner axis is the chitosan solution. The coagulation bath is a mixture of water, ethanol, and alkali solution. After coagulation and molding, nascent fibers are obtained, and finally, vacuum freeze-drying is performed to obtain the polyurethane / chitosan composite porous fiber. This invention adjusts the spinnability and formability of the fiber by regulating the concentration of the spinning solution, and achieves control over the molding process of the composite spinning solution through the synergistic effect of the components in the coagulation bath. This promotes the molding of the composite fiber without destroying its coaxial structure, achieving successful preparation of nascent fibers with a coaxial structure. The spinning method of this invention is simple, low-cost, and can be continuously produced, making it suitable for industrial mass production. The prepared composite porous fiber possesses high elasticity, high strength, and good warmth retention, and has significant market application value.

The utility model discloses a dye mixing device which comprises a supporting frame, a mixing box is rotatably installed on the supporting frame, a stirring piece used for driving dye to flow upwards is installed in the mixing box, and the rotating direction of the mixing box is opposite to the rotating direction of the stirring piece. A spiral flow guide plate for guiding the dye to flow downwards is fixedly mounted on the inner wall of the mixing box. In the process that the first driving piece drives the connecting rod to rotate, the second driving piece also drives the mixing box to rotate, and due to the fact that the rotating direction of the mixing box is opposite to the rotating direction of the stirring piece, the stirring cutter rotates anticlockwise, the liquid dye near the stirring cutter is driven to rotate anticlockwise, and meanwhile the liquid dye is driven to flow upwards. The mixing box drives the spiral guide plate to rotate, so that the liquid dye near the inner wall of the mixing box is driven to rotate clockwise around the axis of the mixing box on one hand, and the liquid dye near the inner wall of the mixing box is driven to flow downwards on the other hand.

The present invention discloses a silver electrode material with an ordered straight-through pore structure, wherein a columnar structure array composed of silver nanoparticles is distributed on the surface of the silver electrode material, and the gaps between the columnar structures are straight or approximately straight straight-through pores in the direction perpendicular to the surface of the silver electrode material; wherein the lateral size of the columnar structure is 0.1 to 20 μm, the height of the columnar structure is 0.2 to 1.4 mm, and the gaps between the columnar structures are 0.01 to 10.0 μm. The straight-through pore structure is conducive to improving the diffusion rate of the electrolyte, improving the exchange rate of reactants and products on the electrode surface during the electrochemical reaction, and improving the reaction rate; at the same time, the conductivity of the columnar structure composed of nanosilver is higher than that of the ordinary silver powder electrode, which is conducive to the transmission of electrons in the electrode body. Therefore, the polarization effect and overpotential of the silver electrode material in the present invention are lower, and the electrochemical performance is better. In addition, the present invention also provides a preparation method of the silver electrode material, which is simple in process, easy to operate, convenient in parameter control, more flexible in process, and higher in preparation efficiency.

The invention discloses a computer self-cooling case, and relates to the technical field of cases. Air inlets are formed in the left side and the right side of the machine shell, a mainboard cavity is formed in the bottom of the inner wall of the machine shell, circuit assemblies are arranged on the left side and the right side of the mainboard cavity, a limiting frame is fixedly installed at the top of the mainboard cavity, and a cooling water pump is fixedly installed at the corner of the inner wall of the limiting frame; the bottom of the cooling water pump is fixedly installed on the edge of the top of the mainboard cavity, the back face of the cooling water pump is fixedly communicated with a concentric-square-shaped pipe, the bottom of the concentric-square-shaped pipe makes contact with the top of the mainboard cavity, and a cooling fan is slidably installed on the inner wall of the limiting frame. The mainboard cavity is subjected to large-range cooling treatment, a cooling water source in the concentric-square-shaped pipe is promoted to continuously keep low-temperature circulation through the cooling fan, it is prevented that in the equipment operation process, parts in a case continuously emit heat, consequently, water-cooling heat dissipation is soft, and it is prevented that the heat dissipation effect is gradually reduced, and consequently the frequency reduction phenomenon of the equipment occurs.

The present invention provides a P-silicon immersion etching solution, which is composed of nitric acid, permonosulfuric acid, acetic acid, fluorine-containing acid, ammonium salt, additives and deionized water. In the etching solution, nitric acid is the main oxidant, permonosulfuric acid is the co-oxidant, which accelerates the oxidation rate of silicon, fluorine-containing acid dissolves silicon dioxide in the etching solution, acetic acid plays a role in buffering the etching rate, and also synergizes with ammonium salt to generate a large number of tiny bubbles in the reaction process, which are quickly exchanged between the silicon wafer surface and the solution, thereby obtaining a uniform etching surface. The additive increases the dissolving ability of the etching solution for the reaction product. Therefore, the P-silicon immersion etching solution in the present invention can etch P-silicon under the immersion process conditions, avoid the generation of black silicon, and obtain a uniform frosted surface.

The application discloses a method for removing titanium impurities in phosphoric acid solution, which comprises the following steps: extracting the phosphoric acid solution containing titanium impurities by using an organic solvent, and collecting the organic phase; mixing the organic phase with the phosphoric acid solution, adding an oxidant and hydrofluoric acid, and mixing uniformly to obtain a mixed solution; adding an ammonium fluoride solution dropwise into the mixed solution to react, and obtaining a reaction solution; washing, clarifying and separating the phases of the reaction solution, and back-extracting the organic phase to obtain the phosphoric acid solution from which the titanium impurities are removed; the removal method is characterized in that: firstly, trace H2O2 is used to convert titanium into active peroxotitanium species; secondly, the initiation effect of NH4F is used to activate the activity of fluoride ions; finally, HF is used as a main fluorine source to form a stable fluorotitanium complex and migrate to the acid phase, and low-titanium purified phosphoric acid is obtained after separation, so that the removal of titanium impurities is realized.

The invention relates to the field of fresh air ventilators, in particular to an energy-saving circulating type fresh air ventilator which comprises a circulation mechanism, the circulation mechanism is used for changing external air pressure, and a machine shell is fixedly installed on the outer side of the circulation mechanism; the filtering mechanism is used for filtering impurities in the wind; the air control mechanism is used for controlling the air flow, and the two ends of the air control mechanism are symmetrically connected with air inducing plates; a first outlet pipe and a second outlet pipe are fixedly connected to the outer side of the machine shell, an exhaust fan is fixedly installed in the machine shell, and the air inducing plate, the filtering mechanism and the air control mechanism are all fixedly installed in the machine shell. And the filter holes are staggered with the filter screen, so that the inner diameters of the filter holes in the filter screen are reduced, and the effect of regulating and controlling the filtering degree is achieved.