41results about How to "Guaranteed storage stability" patented technology

The invention discloses a cold-mixed and cold-laid ultrathin overlay asphalt mixture which is prepared from the following raw materials in parts by weight: 8-15 parts of rubber powder composite emulsified asphalt; 80 to 90 parts of aggregate; 0.3 to 0.5 part of polymer fiber; 0.5 to 1 part of an interface coupling agent; the invention also provides a construction process of the cold-mixed and cold-laid ultrathin overlay asphalt mixture. The rubber powder composite emulsified asphalt is obtained by emulsifying the composite modified asphalt prepared from the ground rubber powder of the waste tires and the SBS rubber, so that the performance index of the emulsified asphalt is greatly improved, and the bonding performance of a cold-mixed thin-layer asphalt mixture and an original pavement is ensured; in addition, by adding the polymer fibers, the structural strength and the crack resistance of the ultrathin overlay can be remarkably improved. The invention can significantly reduce energy consumption and environmental pollution, and has the advantages of noise reduction, environmental protection, low cost and the like.

The pre-filled microneedle injector comprises a needle cylinder, a piston and a needle head, the needle cylinder is of a hollow structure, a limiting ring is arranged at the open end of the needle cylinder, the piston extends into the needle cylinder from one side of the limiting ring and can move up and down in the needle cylinder, a rubber ring is arranged at the bottom end of the piston, and a pushing handle is arranged at the top of the piston; the needle head is fixed to the side, away from the limiting ring, of the needle cylinder and comprises a connecting part and needle tubes, the connecting part extends out of the needle cylinder, and at least one needle tube is embedded into the connecting part in an in-line mode. The syringe is used for injection of biological macromolecular medicine preparations and complex preparations, especially mRNA vaccines or medicine preparations needing to be pre-filled for micro-injection, the hydrophilic film on the inner wall of the needle cylinder enables biological macromolecular medicines such as the mRNA vaccines or the medicine preparations to be stably stored, and the injection efficiency is improved. And through the limiting buckle, the pre-filled microneedle injector cannot leak in the transportation process or the storage process.

The invention discloses soluble powder for preventing and treating chicken necrotic enteritis, and belongs to the technical field of veterinary medicine preparations. The soluble powder preparation comprises the following components: 30-80% of penicillin V potassium, 1-20% of a beta-lactam inhibitor, 0.5-6% of a pH regulator, 0-10% of an anti-caking agent, 0.02-0.5% of a metal ion chelating agent and the balance of a filler, totaling 100%. The soluble powder is used for drinking water of poultry, and the content of penicillin V potassium in an aqueous solution of the soluble powder is still kept at 99% or above after 12 hours and is still kept at 95% or above after 24 hours. The water solution of the soluble powder does not block a water drinking line in clinical use, so that the clinical use effect and convenience are greatly improved.

The invention belongs to the field of petrochemical engineering, and particularly relates to high-stability rubber composite modified asphalt and a preparation method thereof. The rubber composite modified asphalt provided by the invention comprises the following components in parts by mass: 100 parts of petroleum asphalt, 2-3 parts of an SBS modifier and 20-30 parts of a rubber modifier. 0.1-0.3 part of a stabilizer and 2-3 parts of a cosolvent; the petroleum asphalt is 70 # road petroleum asphalt, and the needle penetration is 60-801 / 10mm; the SBS modifier is a styrene-butadiene-styrene block copolymer, the mass ratio of a styrene chain segment to a butadiene chain segment in the block copolymer is 30: 70, and the weight-average molecular weight of the block copolymer is 150000-250000; the rubber modifier is desulfurized rubber particles, and the particle size is 30-60 meshes. The rubber composite modified asphalt provided by the invention has excellent storage stability on the basis of meeting basic index requirements of asphalt products.

The application relates to a pure polyester weather-resistant powder coating drying storage device, belonging to the technical field of pure polyester weather-resistant powder coating storage, which comprises a storage tank, a power support frame and a middle drying assembly, the storage tank is horizontally rotationally connected to the power support frame, the two ends of the storage tank are provided with openings, and the storage tank is provided with a funnel-shaped discharge hopper on one side. The storage tank and the middle drying assembly can relatively rotate, the pure polyester weather-resistant powder coating is lifted to a high position and falls through the strip-shaped protrusions, and the pure polyester weather-resistant powder coating in the storage tank can be stirred in sequence and reciprocally, the heat accumulated in the middle of the storage tank can be quickly dissipated, hot air is discharged from the waterproof air-permeable valve, and the heat in the middle of the storage tank is prevented from being too high. When the humidity in the storage tank is relatively high, the electric heater in the middle drying assembly can be started to dry the pure polyester weather-resistant powder coating, and the device is complete in functions.

The invention discloses an electronic parking device comprehensive testing platform, which relates to the technical field of electronic parking device testing, and comprises: a testing platform, a fixture group, and also comprises: a position deviation judgment component and a testing accuracy maintenance component, wherein the position deviation judgment component is located above the testing accuracy maintenance component; through the design of the arc-shaped groove of the 8-shaped groove, when gas is indirectly stored for the testing accuracy maintenance component under the cooperation of the sliding block and the 8-shaped groove, since the stored gas is gradually increasing, its gas pressure is also gradually increasing. In this process, each time the 8-shaped groove and the sliding block involved in gas storage move with the air pushing plate with the connecting rod, the reaction force on the groove wall of the 8-shaped groove will gradually increase, but due to its arc-shaped design, the force can be effectively dispersed, and the point of action of the force can be adjusted in real time at different positions of the groove wall of the 8-shaped groove during the rotation of the rotating disk. The above design can maintain a good performance state during long-term operation.

The invention belongs to the technical field of coatings, and discloses a water-based bi-component photocureable coating as well as a preparation method and application thereof. The water-based bi-component photocureable coating is prepared from the following raw materials: an acrylic monomer, an acrylate monomer, an initiator, an isocyanate monomer, hydroxyl vinyl ether, a bio-based material, a hydrophilic modifier, epoxy resin, an acrylamide monomer and a neutralizer. In the preparation raw materials, the bio-based material is vegetable oil containing more than three epoxy groups, and the epoxy resin is epoxy resin containing more than three epoxy groups; a double-bond-containing component of the water-based two-component photocureable coating is a polyacrylate dispersion containing vinyl ether double bonds and acrylamide double bonds, and an epoxy group-containing component of the water-based two-component photocureable coating is hydrophilic modified epoxy resin. A paint film of the water-based bi-component photocureable coating has the characteristics of high flexibility, good chemical resistance, excellent adhesion to various substrates and the like.

The application discloses a kind of low morbidity feed for California bass antibiotic-free breeding and preparation method thereof, belong to aquatic feed field.The feed is composed of 60~80 parts of basic feed component, 10~20 parts of fermented plant protein, 2~6 parts of functional compound additives.Fermented plant protein is prepared by compound fermentation of butyric acid clostridium and bacillus subtilis from soybean meal, bran, rice bran, brown sugar and the like.Functional compound additives include pre-embedded material and microcapsule coated sodium butyrate, and the pre-embedded material is prepared by embedding treatment of astaxanthin, lutein and rosemary extract with β-cyclodextrin and gum arabic.The application significantly reduces the incidence of intestinal inflammation of California bass through the synergistic effect of fermented plant protein, pre-embedded antioxidant combination and microcapsule sodium butyrate, enhances antioxidant capacity, improves body color, improves the stability of active ingredients and feeding rate, and realizes low morbidity under antibiotic-free breeding conditions.

The invention relates to the field of D21H21 / 30, and in particular to a stable acid-resistant brightener and a preparation process thereof. The preparation raw materials at least include cyanuric chloride, a sulfonic acid compound, an amine compound and an amino acid. Glycine and glutamic acid are added by design to carry out a condensation reaction, and a liquid fluorescent brightener containing an asymmetric structure is obtained after the reaction, thereby greatly improving the storage stability of the liquid fluorescent brightener. Meanwhile, the liquid fluorescent brightener with a symmetrical structure and the liquid fluorescent brightener with an asymmetric structure generated after the reaction have a composite whitening effect, and the optical behaviors generated by the liquid fluorescent brighteners of different components do not interfere with each other, thereby greatly improving the whitening effect of the stable acid-resistant brightener, solving the problem that the surface of the obtained paper is dark and the whiteness is not high in the process of applying the fluorescent brightener to papermaking, and ensuring the whiteness, water solubility and anti-cation interference ability of the product.

The application discloses a kind of service concrete penetration type anti-freezing protective material and preparation method thereof, belong to concrete protection technical field.The composition of the protective material is: organic silicon modified penetration enhancement component 30~60 parts, nano-crystalline component 10~30 parts, microbial self-repairing component 5~20 parts, composite silane coupling agent 2~8 parts, penetration accelerator 1~5 parts, stabilizer 0.5~3 parts, defoaming agent 0.1~1 part, water 10~50 parts.The application constructs "hydrophobic barrier-crystallization densification-microbial self-repairing" triple synergistic protection system, solves the technical bottleneck that existing concrete protective material penetration depth is shallow, long-acting protection stability is poor, has no active crack repair capacity, construction is complicated, and on-site adaptability is poor.The application preparation process is simple, product performance is stable, cost-effective, can long-acting improve the frost resistance of concrete structure in severe cold area.

The invention provides a water-based pole piece edge sealing insulating adhesive, a preparation method and application. The water-based pole piece edge sealing insulating adhesive has a core-shell structure which takes polyacrylic acid and ester thereof as a core and takes a PAA macromolecular structure fragment as a single-layer or multi-layer shell; a plurality of monomers including acrylic acid, acrylic ester, styrene, polar monomers, self-emulsifying monomers and crosslinking monomers are used as raw materials and are subjected to core-shell emulsion polymerization to prepare the emulsion. Wherein the proportion of the polar group is 5-30%, and the proportion of the self-emulsifying group is 1-8%. By selecting monomer raw materials and controlling the proportion, the prepared adhesive has proper surface tension and viscosity and has excellent infiltration and adhesion performance on current collector aluminum foil, especially oil-containing aluminum foil and inorganic filler, and the peel strength can reach 360 N / m; and the adhesive has a core-shell structure, so that the flexibility of the insulating coating is maintained, excellent low-absorption performance on electrolyte is achieved, and the performance of the battery is not influenced.

The invention relates to the technical field of oral medicine boxes, and provides an intelligent portable oral medicine box and a using method thereof.The intelligent portable oral medicine box comprises a shell, a controller is fixedly connected to the left side of the top end of the shell, a plurality of buttons are arranged on the front side of the top end of the controller, and a second display screen is fixedly connected to the rear side of the top end of the controller; the right side of the top end of the shell is connected with a plurality of top covers through opening and closing pieces, the top ends of the top covers are fixedly connected with a first display screen, the right end of the shell is provided with a plurality of medicine storage grooves corresponding to the top covers, the top ends of the top covers are provided with different numbers, and the numbers of the numbers range from 1 to 8. And through intelligent and accurate medication management, the risks of missed taking and wrong taking are effectively reduced. Through the functions of time calibration and grouping medicine taking plan setting, the medicine taking requirements of different periods of 1-7 days can be flexibly met, the three reminding mechanisms of vibration, sound and display screen flickering are combined, the reminding intensity is dynamically adjusted along with time, and the volume can be automatically matched according to environmental noise.

The invention provides low-odor carpet anti-skid glue which comprises an anti-skid layer pressed on the bottom surface of a carpet, and the surface of the anti-skid layer is uniformly concavely and convexly arranged; the colloid of the antiskid layer comprises the following raw materials in parts by weight: 20-40 parts of a main body rubber material, 10-20 parts of a special particle size filler, 1-5 parts of a tackifying softener, 1-5 parts of an anti-aging agent, 5-10 parts of super wear-resistant carbon black, 5-10 parts of white carbon black, 1-5 parts of a homogenizing agent, 5-10 parts of an additive and 25-40 parts of water; by adopting the main body rubber material, the material is environment-friendly, non-toxic, high in wear resistance and better in anti-skid effect, and the environment-friendly anti-skid rubber is adhered to the surface of a carpet, so that the service life of the carpet is prolonged, and the use safety and comfort of the carpet are improved.

The invention relates to a fast-curing bi-component condensation dealcoholization type silicone adhesive and a preparation method thereof. The fast-curing bi-component condensation dealcoholization type silicone adhesive is prepared from a component A and a component B, wherein the component A comprises hydroxyl silicone oil or alkoxy silicone oil, filler A, a cross-linking agent, a coupling agent and a catalyst; the component B is prepared from inert silicone oil, a Burge reagent (N-(triethyl ammonium sulfonyl) methyl carbamate) and a filler B. In the curing process of the adhesive, the organic silicon condensation dealcoholization vulcanization reaction and the Burge reagent are used as dehydrating agents for alcohol dehydration alkene reaction to achieve a synergistic catalysis effect, room-temperature rapid deep curing of the dealcoholization type organic silicon adhesive is finally achieved, and the curing depth of an adhesive layer within 4 hours can be larger than or equal to 20 mm; the adhesive is suitable for application scenes requiring room-temperature rapid curing or deep encapsulation and the like, and the production efficiency can be remarkably improved.

The application provides a water-soluble support material and a preparation method and application thereof, and relates to the technical field of 3D printing materials. The water-soluble support material comprises, in terms of mass fractions, 30-45 parts of polyether-based diisocyanate, 30-40 parts of a water-soluble monofunctional monomer, 5-20 parts of a water-soluble organic solvent, 5-15 parts of an emulsifier and 1-10 parts of a photoinitiator. The polyether-based diisocyanate contains free isocyanate groups, can react with water to generate gas in a water washing process, construct a pore channel in situ in the support structure, significantly accelerate the penetration and dissolution of water, and realize the rapid removal of the support material. Meanwhile, the water-soluble support material has excellent inkjet adaptability, ensures stable jetting in the printing process, good interlayer bonding, clear and complete shaping, and is suitable for the synchronous support construction and efficient post-processing of complex models in inkjet 3D printing.

This utility model relates to the field of kitchen storage equipment technology and discloses an adjustable modular kitchen utensil rack, including a base, a top plate, a support cylinder, and an adjustable connecting rod. The support cylinder is connected to the top of the base, and the top end of the adjustable connecting rod is connected to the bottom of the top plate by screws. The bottom end of the adjustable connecting rod passes through the support cylinder and extends into the interior of the support cylinder. This utility model supports stepless height adjustment in both directions through a bidirectional toothed ratchet and a slotted axial sliding spline connection design. Combined with the inclined wedge drive structure of the mechanical button, unlocking and resetting can be completed in a single operation, improving adjustment efficiency compared to traditional ratchet mechanisms and meeting the flexible adaptation needs of kitchen utensils of different heights (such as tall pots and short plates). In addition, the partitioned tray and the wire mesh frame are modularly installed through elastic buckles, while the drainage design of the filter plate and the water collection tank reduces cleaning time, achieving a balance between functionality and convenience.

The utility model relates to the technical field of equipment storage, in particular to an intelligent equipment terminal storage device which comprises a goods shelf body, the goods shelf body comprises a back plate, supporting mechanisms fixedly installed on the left side and the right side of the back plate and a plurality of layer plates perpendicularly arranged on the supporting mechanisms on the two sides, and a folding plate is arranged between every two adjacent layer plates. The lower end of the folding plate is hinged to the back plate, the folding plate can rotate to the position attached to the back plate or the horizontal position, and the back plate is connected with the side edge of the folding plate through a traction device. The goods shelf body is further provided with a plurality of RFID scanning antennas and a plurality of RFID radio frequency identification modules, and the RFID scanning antennas are electrically connected with the RFID radio frequency identification modules. The foldable folding plate is additionally arranged on the traditional goods shelf body, so that the intelligent equipment terminal and the metering equipment can be stored under the condition that layer plates are not added.

The utility model discloses a building material storage anti-drop structure in the technical field of building material storage, which comprises a bottom plate, a plurality of groups of storage racks are fixedly arranged on the inner side of a fixed frame, first screws are rotatably arranged on the inner sides of the plurality of groups of storage racks, mounting plates are movably arranged on the two sides of the first screws, and a plurality of groups of connecting rods are fixedly arranged on the outer sides of the two groups of mounting plates. Limiting blocks are fixedly arranged at the outer side ends of the multiple groups of connecting rods, two sections of threads in opposite directions are arranged on the outer side of the first screw rod, threaded blocks sleeve the two sections of threads in opposite directions on the outer side of the first screw rod, moving blocks are rotationally arranged on the two sides of the two groups of threaded blocks, supporting blocks are rotationally arranged on the outer sides of the moving blocks, and the supporting blocks are fixedly connected to the mounting plate. Through the simple installation structure, the tubular building materials can be conveniently limited, the stability of the tubular building materials is guaranteed, the situation that the tubular building materials fall off from the storage rack is avoided, the use safety is improved, the practical effect is good, and the tubular building material storage rack is worthy of being popularized and used in the existing market.

The invention relates to the technical field of medicine, in particular to a palonosetron hydrochloride soft capsule and a preparation method thereof.According to the palonosetron hydrochloride soft capsule and the preparation method thereof, malic acid is used for modifying gelatin, the formed malic acid esterification modified gelatin can effectively prevent condensation reaction of carboxyl and amino in the gelatin, and slow disintegration of the palonosetron hydrochloride soft capsule is reduced; through mutual cooperation of the selenized glucan and the malic acid esterification modified gelatin, the stability of the glue solution for the soft capsule shell is enhanced, the disintegration time limit of the soft capsule shell is shortened, and rapid dissolution of the palonosetron hydrochloride component in the palonosetron hydrochloride soft capsule is promoted; the palonosetron hydrochloride solution and the oil-phase composition are homogenized and emulsified at a high speed, so that the dispersity and the stability of the active ingredient of the palonosetron hydrochloride in the soft capsule content can be improved, and further rapid dissolution of the active ingredient of the palonosetron hydrochloride after the palonosetron hydrochloride soft capsule is disintegrated is facilitated.

The present invention relates to a preparation method of oxaliplatin for injection, including: preparing a liposome solvent by a liposome preparation and an amphiphilic membrane stabilizer, preparing a chitosan solution, mixing the chitosan liposome micelle with the liposome solvent; mixing the chitosan liposome micelle with a free oxaliplatin solution to form an oxaliplatin polymer micelle in which oxaliplatin is encapsulated in the chitosan liposome micelle; freeze-drying to obtain oxaliplatin for injection. The present invention provides a method of making oxaliplatin exist in the form of polymer micelles by selecting a specific liposome preparation and an amphiphilic membrane stabilizer, greatly improving the cancer cell inhibition rate, delaying the drug release time, improving the circulation time of the drug in the blood, and ensuring storage stability.

The invention relates to the technical field of batteries, in particular to a dispersing agent and a preparation method and application thereof. The dispersing agent is a copolymer and comprises a main chain formed by copolymerization of an oil-soluble olefinic unsaturated monomer unit M1 and an olefinic unsaturated monomer unit M2 containing anhydride and / or carboxyl; the polymer side chain R1 is grafted on the M2 unit of the main chain and contains an ether bond and / or an ester bond; and the side chain R2 is grafted on the M2 unit of the main chain and contains an amide group. Wherein the polymer side chain R1 guarantees the long-term dispersion stability of the particles through a steric hindrance effect; the side chain R2 captures moisture and neutralizes acidic impurities through an amide group of the side chain R2, so that chemical passivation of the lithium supplementing agent is realized, and a gas production side reaction is inhibited from the source; and the main chain further optimizes the overall stability of an electrode interface by enhancing the compatibility of each component, so that the synergistic improvement of the processability, storage stability and electrochemical cycle performance of the slurry is realized.

The utility model discloses a vertical positioning structure of a fixed airing rod and a movable quilt airing rod, the movable quilt airing rod is connected to the fixed airing rod through a rotating arm, and the fixed airing rod is of a rectangular structure and comprises two first cross rods, two second cross rods and four corner seats; the end part of the first cross rod is connected with the end part of the second cross rod through a corner seat; the corner seat comprises a first interface for inserting the end part of the first cross rod and a second interface for inserting the end part of the second cross rod; the first connector comprises a top wall, a bottom wall and two side walls, and the upper surface of the top wall is provided with a sunken groove position in the same extending direction as the first transverse rod. The bottom surface of the end part of the movable quilt airing rod falls into the sunken groove position; at least one of the bottom surface of the end part of the movable quilt airing rod and / or the concave groove position is provided with a rough surface capable of increasing the friction force of the contact surface of the movable quilt airing rod and the concave groove position; therefore, the storage stability of the movable quilt airing rod is ensured.

The application belongs to the technical field of microorganisms, and discloses a salt and alkali tolerant squirrel mammalian coccus and application thereof. Mammaliicoccus sciuri ​ STM10, which is a gram-positive coccus, has been preserved in the China General Microbiological Culture Collection Center with a preservation number of CGMCC No.38450. The strain has salt and alkali tolerance, can play the promoting functions of nitrogen fixation, phosphorus dissolution and resolution, iron carrier production and protease production, and can be prepared into microbial fertilizer. Application of the microbial fertilizer can effectively relieve salt and alkali stress, improve the seed germination and growth ability of crops, improve the physical and chemical properties of saline-alkali soil, optimize the ion environment, promote the nutrient absorption of crops, and provide support for agricultural utilization of saline-alkali land.

The invention belongs to the technical field of coatings, and discloses an epoxy modified light-cured polyacrylate dispersion as well as a preparation method and application thereof. The epoxy modified light-cured polyacrylate dispersion is prepared from the following raw materials: an acrylic monomer, an acrylate monomer, an initiator, an isocyanate monomer, hydroxyl vinyl ether, a bio-based material, a hydrophilic modifier, epoxy resin, an acrylamide monomer and a neutralizer. The solid content of the epoxy modified light-cured polyacrylate dispersion is 38 to 41 percent; the bio-based content of the epoxy modified light-cured polyacrylate dispersion is greater than or equal to 15%; the particle size of the epoxy modified light-cured polyacrylate dispersion is 1t; the wavelength is 110nm. A paint film of a water-based light-cured bio-based paint prepared from the epoxy modified light-cured polyacrylate dispersion has the characteristics of high flexibility, good chemical resistance, excellent adhesion to various substrates and the like.

The utility model relates to the technical field of entertainment equipment, concretely relates to a ball game box, its including: box body, the box body is rectangular structure, and top is equipped with rectangular groove, a plurality of obstacle board is distributed in the rectangular groove, and one end of rectangular groove is arranged with a plurality of collection groove along the width direction, still be equipped with the ball collection track along the width direction through each collection groove in the box body, one end of ball collection track is equipped with the ball launcher, the bottom of box body corresponds one end of ball collection track along the width direction and is equipped with the hinged shaft, base, the base is frame structure, and is through both sides' axle frame and hinged shaft end cooperation, both sides of base top are hinged with the support plate respectively, the bottom of box body corresponds each support plate along the length direction and is arranged with a plurality of positioning slot respectively. The utility model realizes the stepless adjustment of the inclination angle, and still can make the equipment foldable flat state, solves the storage problem of traditional integral structure.

The utility model discloses an ammonia water storage and seal integrated tank device relates to chemical equipment technical field, the utility model discloses a tank body, upper cover, lower pipe valve, surround pipe, mixing mechanism and constant temperature circulation structure, the tank body is used for storing ammonia water, and its lower extreme is equipped with lower pipe valve, is used for controlling material discharge, and the tank body outside is equipped with support structure, ensures equipment stable operation, the upper cover is connected in the tank body top through screw thread, and the inside is equipped with surround pipe, is used for the import constant temperature medium, realizes the temperature regulation in the jar, prevents ammonia water crystallization or volatilization, the mixing mechanism includes main rotation lever, from rotation lever and multiple groups of stirring vane, realizes multi -shaft synchronous stirring through gear drive, and the stirring vane adopts reverse rotation design, and the mixing effect is enhanced, and the material uniformity is promoted, the whole structure is integrated in storage, mixing, temperature control and sealing function, and the stability of ammonia water storage and conveying safety has been effectively promoted, is applicable to the application scene of efficient treatment to ammonia water in chemical industry, environmental protection and energy etc. field.

The invention provides an alkaline polishing solution based on modified silica sol and a preparation method and application thereof. The polishing solution is prepared from, by mass, 5%-15% of silica sol, 0.01%-0.2% of silane coupling agent, 0.1%-1.5% of additive and the balance pH regulator and water, and the pH value of the polishing solution is 8-11 through the pH regulator; the silane coupling agent is an amino silane coupling agent. The alkaline monocrystalline silicon polishing solution provided by the invention is environment-friendly, high in polishing efficiency and low in surface damage, and high-precision polishing of a monocrystalline silicon wafer is realized by modifying silicon dioxide through amino silane to optimize the dispersity of a grinding material.

This invention relates to the field of biological sample storage technology and discloses an automated ultra-low temperature micro-positive pressure device and system, comprising: an upper frame and a lower frame; the upper frame includes a micro-positive pressure chamber, a motion module, a PSA nitrogen generation module, and an upper frame base; the micro-positive pressure chamber is disposed on the upper frame base, the motion module is installed inside the micro-positive pressure chamber, and the PSA nitrogen generation module is connected to the micro-positive pressure chamber through a first flange interface; the motion module integrates a cover gripping assembly, a hand gripping assembly, and a pipette tip assembly; the cover gripping assembly is used to grip the cover plate of the chamber or the transport box; the hand gripping assembly is used to grip the sample tray; and the pipette tip assembly is used to aspirate cryopreservation tubes. This invention constructs a micro-positive pressure inert environment, automates sample storage and retrieval, precisely controls temperature, monitors and adjusts in real time, improves the reliability and convenience of ultra-low temperature storage, and ensures the long-term stable preservation of biological samples.

This invention provides a highly conductive copper paste that cures in an air atmosphere, its preparation method, and its applications, belonging to the field of conductive paste preparation technology. The highly conductive copper paste comprises: 60-80% conductive copper powder; 3-10% polymer resin; 1-3% curing agent; 3-10% first solvent; 1-5% additives; and 7.5-17% particle-free conductive copper ink. The copper salt precursor in the particle-free conductive copper ink is dissolved in the form of copper ions in a mixture of its complexing agent and second solvent. When the highly conductive copper paste is heated and cured in an air atmosphere, the copper ions in the particle-free conductive copper ink are reduced in situ to nano-copper particles, which form welded connections between the conductive copper powder particles, constituting a conductive network composed of micron-sized conductive copper powder and in-situ generated nano-copper weld points. The highly conductive copper paste of this invention has low manufacturing cost, high conductivity, and the potential for room temperature dormancy and heat-triggered decomposition.

The utility model discloses a tool storage device for fire detection, and belongs to the technical field of tool storage, the tool storage device for fire detection comprises a box body, one end of the top of the box body is fixedly connected with a limiting block, and the interior of the box body is slidably connected with a group of drawers; a drawer is arranged in the box body, positioning grooves are formed in the positions, close to the top faces, of the two ends of the drawer, a lead screw is movably connected to the position, close to one end, of the interior of the box body, and a mistaken touch prevention mechanism is arranged at the top end of the lead screw. Meanwhile, opening and closing adjustment of the storage device is synchronously completed, tools are convenient to take and store, the mistaken touch prevention assembly is arranged, the state of the adjusting end of the lifting adjusting assembly can be adjusted, the mistaken touch problem is reduced, and the storage stability of the storage device is guaranteed.