11results about How to "Barrier contact" patented technology

The application discloses an antioxidant composite ceramic aerogel and a preparation method thereof, and belongs to the technical field of composite ceramic aerogels.The main body of the antioxidant composite ceramic aerogel is a silicon nitride aerogel, the nanostructure of the silicon nitride aerogel is one of one-dimensional silicon nitride nanowires and two-dimensional silicon nitride nanobands or a combination of the two nanostructures, and a mullite coating and a copper-nickel metal coating are sequentially coated on the nanostructure of the silicon nitride aerogel from inside to outside.The application can solve the technical problem that the prior art cannot prepare silicon nitride ceramic aerogels which can stably serve in a high-temperature oxygen environment at low cost and in batches.

This invention discloses a low-corrosion chloride molten salt heat transfer and storage medium, method, and application, belonging to the field of molten salt thermal storage technology. The high-heat-capacity, low-corrosion carbonate molten salt heat transfer and storage medium of this invention is composed of 18%~22% potassium chloride, 6%~10% sodium chloride, 1%~3% aluminum powder, 1%~3% magnesium powder, 1%~3% zinc powder, with the remainder being zinc chloride. Its key feature is the introduction of metal powder into the molten salt, which not only achieves excellent thermal storage performance at 600℃~800℃, but also reduces corrosion by utilizing the potential regulation ability of dissolved metal ions and the formation of highly active [Al] from gaseous chloride products through physical and chemical adsorption. This low-corrosion chloride molten salt heat transfer and storage medium achieves excellent thermal storage performance and low corrosivity, and can be applied in solar thermal power generation and molten salt energy storage.

This invention discloses a chromium-free passivation and fingerprint-resistant composite treatment method for high-aluminum-zinc-aluminum-magnesium steel plates, belonging to the field of metal sheet surface protection technology. The specific steps of the method are as follows: A fine-grained high-aluminum-zinc-aluminum-magnesium steel plate is selected as the substrate, and firstly, it undergoes multi-stage cleaning and hot air drying. Next, the dried substrate is immersed in a composite chromium-free passivation solution to form a passivation precursor film. Then, a porous inorganic passivation layer is prepared through low-temperature hot air curing. Subsequently, a modified fingerprint-resistant resin is roller-coated onto its surface to form an organic precursor film. Finally, a constant-temperature curing treatment is performed to produce a chromium-free passivation and fingerprint-resistant composite film. This invention uses multi-stage cleaning and chromium-free passivation processes on the high-aluminum-zinc-aluminum-magnesium steel plate to form a porous inorganic passivation layer, enhancing corrosion resistance. Then, a composite protective film layer is constructed by reverse roller coating of modified fingerprint-resistant resin, achieving functional integration. This process improves the environmental protection and protective properties of the plate, meets the needs of multiple fields, and expands the application scenarios and market scope.

This application relates to a passivation treatment solution, aluminum alloy components, and a method for preparing the same. The passivation treatment solution comprises a solvent and components dispersed in the solvent at the following concentrations: fluorozirconate 5 g / L–30 g / L, fluorinated silane coupling agent 10 ml / L–50 ml / L, polyphenol complexing agent 1 g / L–8 g / L, and silicate 5 g / L–25 g / L. The passivation treatment solution, through a multi-component synergistic formulation composed of fluorozirconate, fluorinated silane coupling agent, polyphenol complexing agent, and silicate, exhibits different functions and molecular bridging synergistic effects. After passivation treatment of anodized aluminum alloys, the alkaline corrosion resistance of the aluminum alloys can be significantly enhanced.

This invention relates to the fields of fine chemicals and polymer materials technology, specifically a method for manufacturing toy adhesives. It includes steps for preparing the adhesive base material, preparing borax solution, and cross-linking molding. Polyvinyl alcohol, guar gum, methylparaben, etc., are prepared as base materials, which are then reacted with borax solution to undergo a cross-linking reaction. The core of this invention is the strict limitation of specific high-temperature ranges and constant-temperature stirring times during the base material preparation process, which promotes the complete extension and entanglement of molecular chains, constructing a dense and uniform three-dimensional network structure. This invention effectively avoids microscopic particle residue and stress concentration, achieving a significant improvement in the tensile strength, elongation at break, and resilience of the toy adhesive.

This utility model relates to a printer, comprising: a frame; a printer core including a support assembly, a printhead assembly, and a roller assembly, wherein the support assembly is movably mounted on the frame, the printhead assembly is connected to the support assembly, and the roller assembly is disposed opposite to the printhead assembly; a paper feed motor mounted on the frame; a cutter assembly including a fixed bracket positioned above the frame; a contact spring located between the fixed bracket and the frame, the contact spring including a base plate and a support leg, the base plate being disposed on the outer bottom wall of the fixed bracket, and the support leg being connected to the housing of the paper feed motor and the support assembly; and a wire, the first end of which is connected to at least one of the support assembly, the housing of the paper feed motor, the fixed bracket, and the contact spring, and the second end being used for grounding; the housing of the paper feed motor, the support assembly, the fixed bracket, and the contact spring are all made of conductive materials. This device can discharge static electricity generated by the paper feed motor, the printer core, and the cutter assembly through a single contact spring, making assembly and disassembly convenient.

The application relates to a vacuum rapid-congealing continuous furnace safety door which comprises a door frame arranged at the bottom of a continuous furnace, a maintenance opening arranged at the bottom of the continuous furnace and located in the door frame, a rectangular frame arranged at the front end of the door frame, a door body hinged to one side of the door frame, a plurality of pressing devices arranged on the rectangular frame and used for pressing the door body on the rectangular frame, and an observation window arranged on the door body. The safety door structure provides a preset rapid channel for the bottom of the furnace body. When extreme working conditions such as molten crucible liquid leakage or cooling system water leakage occur, the bottom safety door can be quickly opened to drain water.

This invention provides a single-cavity explosion-proof electromagnetic relay, comprising a base plate, a coil support on one side of the base plate, a coil mounted in the coil support, an adsorption plate above the coil support for contacting normally open or normally closed contacts, normally open, normally closed, and other contacts integrated into the base plate, a contact heat-conducting plate embedded within the base plate for contacting the normally open or normally closed contacts, and the upper and lower ends of the coil respectively contacting the coil heat-conducting plate; an inner sleeve connected to the base plate is provided outside the coil support, an outer sleeve is provided outside the inner sleeve, and a support grid is provided inside the outer sleeve, forming a gap between the inner sleeve and the outer sleeve for resin casting; heat dissipation fins are bolted to the outside of the movable cover. This invention maintains excellent explosion-proof performance while ensuring heat dissipation performance, achieving a balance between the two and meeting the requirements for use in a single explosion-proof cavity.

The application discloses a high-temperature oxidation-resistant ceramic aerogel and a preparation method thereof, and belongs to the technical field of ceramic aerogels.The main body of the high-temperature oxidation-resistant ceramic aerogel is a silicon nitride aerogel, the nanostructure of the silicon nitride aerogel is one of one-dimensional silicon nitride nanowires and two-dimensional silicon nitride nanobands or a combination of the two nanostructures, and the nanostructure of the silicon nitride aerogel is sequentially coated with a silicon carbide precursor coating and a zirconium carbide precursor coating from inside to outside.The application can solve the defects that traditional ceramic aerogels are prone to oxidation failure under superhigh temperature and are difficult to be prepared at low cost and in large scale.

The application belongs to the technical field of fertilizers, and particularly relates to an environment-friendly urea slow-release fertilizer and a preparation method thereof. The preparation method of the urea slow-release fertilizer comprises the following steps: S1. Modified sodium-based montmorillonite is added to water, and a modified sodium-based montmorillonite suspension is obtained after ultrasonic dispersion; urea and puhuizi polysaccharide are uniformly mixed and preheated to obtain mixed particles; S2. The modified sodium-based montmorillonite suspension is sprayed on the surface of the mixed particles, and the environment-friendly urea slow-release fertilizer is obtained after drying. The method is simple and easy to operate, and the obtained fertilizer has excellent slow-release performance.

This invention relates to the field of fish farming technology, specifically to a fish feeding device, comprising a feed storage bin and a mounting bracket installed on the outer wall of the feed storage bin. A discharge pipe is located at the bottom of the feed storage bin, and a first opening / closing assembly, a second opening / closing assembly, and a feed dispensing assembly are sequentially installed inside the discharge pipe from top to bottom. This invention utilizes the linkage design of the first and second opening / closing assemblies. The rotating disc plate rotates, and a rotating long plate is driven to rotate via a first linkage rod. The rotation of the long plate, through a hinged rod, causes the opening / closing plate to slide symmetrically within the discharge pipe, achieving double-layer closure and opening of the discharge pipe. This effectively prevents moisture from contacting the fish feed inside the feed storage bin, preventing the fish feed from becoming damp and clumping.