9results about How to "Slow release rate" patented technology

The invention provides a spirotetramat polyurethane / polyurea microcapsule suspending agent as well as a preparation method and application thereof, and belongs to the technical field of pesticide preparations. The preparation method comprises the following steps: mixing an oil-phase solution containing spirotetramat raw medicine and polyisocyanate with a water-phase solution containing an emulsifier and a dispersant, carrying out shear emulsification, adding a water-soluble wall material monomer water solution containing polyamine and / or polyol, and carrying out an interfacial polymerization reaction; after the polymerization is finished, sequentially carrying out curing treatment and cooling, then adding an auxiliary agent, and blending to obtain the spirotetramat polyurethane / polyurea microcapsule suspending agent. The spirotetramat microcapsule suspending agent is prepared through an interfacial polymerization method, spirotetramat is coated in a polyurethane or polyurea capsule wall, and the spirotetramat microcapsule suspending agent has the advantages of being high in encapsulation efficiency, good in physical and chemical stability, long in pesticide effect lasting period, safer to non-target organisms (such as bees) and the environment and the like. The preparation method is stable in process, easy for industrial production and excellent in product performance.

The utility model discloses a safety pressure relief valve structure of a high-pressure storage tank of a hydrogen energy storage system. The safety pressure relief valve structure comprises a pressure relief valve shell, a pressure relief valve element and a pressure relief valve body which are sequentially connected to form a pressure relief channel. A through opening is formed in the end, connected with the pressure relief valve element, of the pressure relief valve shell, and a plugging block pressed at the through opening through a spring is arranged in the pressure relief valve element. A sealing groove is formed in the pressure relief valve body, a plurality of graphite rings are arranged in the sealing groove, honeycomb holes communicated with the sealing groove are further formed in the pressure relief valve body, and pressure relief holes communicated with the honeycomb holes are formed in the tail end of the pressure relief valve body. According to the safety relief valve structure of the high-pressure storage tank of the hydrogen energy storage system, a main sealing interface is formed by the plugging block pre-tightened by the spring and the through opening, a labyrinth type sealing path is formed in cooperation with the staggered notch of the graphite ring, double-sealing protection is achieved, the sealing position of the plugging block can be adjusted in a self-adaptive mode along the guide sliding groove when pressure fluctuates, the contact pressure of the sealing face is effectively balanced, and the safety of the high-pressure storage tank of the hydrogen energy storage system is improved. The sealing reliability under the long-term high-pressure working condition is remarkably improved, and leakage of trace hydrogen is avoided.

The application relates to an antibacterial agent and a preparation method thereof, a powder coating, a product with antibacterial function and a preparation method thereof. The antibacterial agent comprises an inorganic carrier and silver ions, copper ions and third metal ions supported on the inorganic carrier; the third metal ions comprise one or more of nickel ions, titanium ions, manganese ions and zinc ions; the content of the silver ions is greater than the content of the copper ions and greater than the content of the third metal ions. In the antibacterial agent, the silver ions play a main antibacterial role, the copper ions are used for reducing the silver ions, the state of the silver ions is protected, the third metal ions increase the number of additional exchangeable cations, the release speed of the silver ions is delayed, and the copper ions are matched to improve the durability of the antibacterial effect of the silver ions.

The invention belongs to the technical field of cable take-up and pay-off equipment, and discloses cable take-up and pay-off equipment and a walking robot. The cable take-up and pay-off equipment comprises a cable reel, a driving device and a cable state detection device. And the cable reel rotates to wind or release the cable. And the driving device drives the cable tray to rotate. The cable state detection device is located on the downstream of the cable reel in the cable releasing direction and comprises a guide roller, a swing connecting structure and an angle detection structure. A cable extending out of the cable reel extends and penetrates through the cable state detection device, and the angle detection structure can detect the swing position of the swing connection structure. When the cable is in a loose state, the swing connecting structure swings to a first position, and the cable tray reduces the release speed of the cable; when the cable is in a straightened state, the cable abuts against the guide roller, the swing connecting structure swings to the second position, and the cable reel releases the cable at the current speed. The cable take-up and pay-off equipment can avoid cable accumulation or cable tensile fracture, and the moving process of the walking robot and the cable take-up and pay-off process are balanced.

The invention discloses a line pipeline restraining and positioning device for nursing, and relates to the technical field of nursing, the line pipeline restraining and positioning device comprises a base, the upper part of the base is provided with a plurality of cylinders, the inner sides of the cylinders are rotatably connected with a rotating plate, the upper part of the rotating plate is provided with two first restraining wheels, and the upper part of the rotating plate is provided with a supporting rod; a second restraining wheel is installed on the upper portion of the supporting rod, a releasing assembly is arranged on the cylinder body, the rotating plate and the second restraining wheel jointly, and the releasing assembly comprises a torsional spring jointly installed between the cylinder body and the rotating plate, a limiting plate movably connected to the inner side of the cylinder body, a plurality of protruding blocks installed on the outer side of the rotating plate and a semicircular plate movably connected to the upper portion of the cylinder body; by arranging the releasing assembly, when a line or a pipeline is restrained, positioned and pulled, the line or the pipeline can be rapidly responded and released, rapid releasing is achieved, part of pulling force can be offset through releasing of the line or the pipeline, and the situation that nursing work is interrupted due to disconnection after the line or the pipeline is pulled is avoided.

The application relates to the technical field of supramolecular, in particular to a supramolecular salicylic acid and a preparation method and application thereof, the preparation method comprises the following steps: mixing salicylic acid, a ligand and an auxiliary agent, stirring and ultrasonicating to obtain the supramolecular salicylic acid; the ligand comprises L-lysine or arginine; and the molar ratio of the salicylic acid to the ligand is 1:1. The supramolecular salicylic acid prepared by mixing the salicylic acid and the ligand in a certain proportion and dissolving them in the auxiliary agent improves the solubility, stability and permeability of the salicylic acid. The supramolecular salicylic acid prepared by the application has good solubility and stability, strong permeability, small skin irritation, a simple and environment-friendly preparation method and is suitable for large-scale production.

The utility model discloses an assembly valve core component of a hydrogen gas stove, which relates to the technical field of hydrogen gas stoves and comprises a valve core component. Fuel gas enters the valve element body through the communicating hole in the bottom, the rotary knob is screwed anticlockwise to reach the ignition position, the valve element body is driven to rotate anticlockwise at the same angle through the two grooves of the valve element body, at the moment, the small hole with the step is communicated with the first gas outlet hole, and hydrogen enters the inner ring fire distributor through the first gas outlet pipe; when the fire distributor continues to rotate anticlockwise, the long-strip-shaped hole is communicated with the first air outlet hole, the center fire becomes large, the fire distributor rotates anticlockwise again till the large hole and the second air outlet hole are connected with hydrogen, the outer ring fire distributor can be ignited, and at the moment, the outer ring fire distributor is in the maximum fire power state; by changing the past use habits of the household gas stove, the hydrogen communication sequence is changed, the hydrogen release speed is slowed down, and the adaptability of the device is improved.

This utility model belongs to the field of toilet cleaning technology, specifically a slow-release structure for toilet water cleaner, including a placement cylinder; a cap is detachably installed at the end of the placement cylinder via threads; a spring is fixedly connected to the side wall of the cap; a rubber block is fixedly connected to the other end of the spring; a release hole is fixedly connected to the middle of the rubber block; a first through hole is opened in the middle of the cap; an installation block is provided on the outside of the placement cylinder; a pair of circular cavities are opened in the middle of the installation block; a suction cup is fixedly connected to the end of the circular cavity; a pull rod is fixedly connected to one side of the suction cup located in the circular cavity; the pull rod is slidably connected to the middle of the installation block; with the above structure, after the block cleaner is placed into the toilet tank, the water liquid can come into contact with a small amount of block cleaner surface, thereby reducing the release rate of the block cleaner, and even when the block cleaner shrinks due to gradual release, the block cleaner can still come into contact with a small amount of water liquid and be slowly released.

The application provides a slow-release edible salt and a preparation method thereof, and the slow-release edible salt comprises salt particles and a slow-release layer wrapped on the surface of the salt particles; the slow-release layer is prepared from the following raw materials in parts by weight: 100 parts of water, 3-10 parts of an emulsifier, 0.5-3 parts of sodium citrate, 4-10 parts of glutamine peptide, 0.5-1.0 parts of water-soluble soybean polysaccharide and 0.01-0.05 parts of tea polyphenol; the slow-release edible salt provided by the application is wrapped with a slow-release layer on the surface of the salt particles, so that the release area of the salt is reduced, the release speed of the salt is reduced, the release of the salt is retarded, and the slow-release effect of the salt is ensured; meanwhile, the glutamine peptide in the slow-release edible salt provided by the application can enhance the perception of salty taste by human taste buds, so that the intake of the edible salt is reduced.