22results about How to "No corrosion" patented technology

The invention relates to the technical field of fire fighting and extinguishing, in particular to a forest fire extinguishing rocket projectile with a racemization empennage, which comprises a projectile head, a projectile body, a solid rocket engine, the racemization empennage and a baffle ring, the bomb body is provided with a shell, a superfine dry powder extinguishing agent, a front sealing plate, a rear sealing plate and an initiating explosive column, the solid rocket engine provides power for flight, the rotation eliminating empennage can rotate around the axis of the bomb body to eliminate airflow interference, and the baffle ring axially limits the rotation eliminating empennage; according to the forest fire extinguishing rocket projectile with the racemization empennage, long-distance launching is achieved through the solid rocket engine, accurate spreading of the fire extinguishing agent is guaranteed through the infrared proximity fuze, the superfine dry powder fire extinguishing agent is environmentally friendly and efficient, the racemization empennage improves the drop point precision, the forest fire extinguishing rocket projectile is suitable for fire extinguishing of large-area fire sources such as forests and grasslands, the casualty risk is reduced, and the forest fire extinguishing rocket projectile is suitable for large-area fire extinguishing. And the fire extinguishing timeliness and effectiveness are effectively improved.

The application discloses a preparation method of 3,4,5,6-tetrahydrophthalic anhydride by catalytic isomerization, and nitrogen-doped porous carbon is prepared by carbonizing melamine sponge, the nickel is loaded by cooperating with wetting of a surfactant and ultrasonic cavitation, and the loaded nickel catalyst is obtained by roasting and reduction. 1,2,3,6-tetrahydrophthalic anhydride is heated and refluxed in an organic solvent and catalyst to isomerize, the catalyst is recovered by filtration, and the product is obtained by cooling and crystallizing the filtrate. The method utilizes the through macroporous structure to eliminate the mass transfer resistance, and the nitrogen-anchored nickel prevents agglomeration, so that the catalyst is low in cost, recyclable and free of waste water.

The application provides a kind of biobased degradable industrial degreasing cleaning agent and its preparation method, it is related to the field of industrial degreasing cleaning agent, it includes biobased wetting penetration component, biological emulsification curling core component, natural plant solubilization component, non-phosphorus biological chelation component, natural corrosion inhibition dispersion buffer component, environmental protection bacteriostatic low-foam auxiliary agent, deionized water carrier, core function raw material is taken from plant fermentation, natural oil, microbial fermentation product, abandon petroleum-based non-degradable auxiliary agent, realize the biodegradation of all components, build wetting+permeation+solubilization+emulsification+curling+dispersion six-element synergistic degreasing system, overcome the industry pain point that traditional water-based cleaning agent is difficult to clean thick lithium / calcium / urea-based grease, heavy oil stain 10s rapid stripping effect.

This invention discloses a structure with dual-end limiting function, specifically relating to the field of shower head technology. It includes a mounting base with a freely rotatable and anti-detachment rotating sleeve at its bottom. The rotating sleeve has a threaded hole, with a limiting block and a limiting component at each end of the hole. The limiting component includes a sealing plate and a second limiting block that tilts inward towards the threaded spiral structure. A screw is threaded into the threaded hole, with an extension at the top of the screw. A support body rotatably mounted within the mounting base can be linked with the extension via an eccentric shaft-roller, cylindrical spiral rail-pulley, or rack-gear structure. This invention prevents the screw from detaching and avoids axial failure through a dual-limiting structure. The rotating sleeve and screw work together to raise and lower the extension, enabling flexible adjustment of the shower head tilt angle. The rotating sleeve is equipped with ball bearings and anti-slip textures, and the screw, with its special dimensions and thread count design, also features a sliding retainer. This solves the problems of inconvenient adjustment, jamming, and lack of effective limiting in traditional shower head support bases, resulting in smooth adjustment, precise positioning, and safe use.

The utility model provides a kind of armoured tungsten-rhenium thermocouple, belong to temperature measurement technical field, this armoured tungsten-rhenium thermocouple, including armoured protection pipe, the tungsten-rhenium electrode being arranged in armoured protection pipe inside, insulation material being filled between armoured protection pipe and tungsten-rhenium electrode, terminal box and sealing assembly being arranged in armoured protection pipe one end, pass through double sealing structure, construct full-closed protection system, can effectively resist the invasion of high-temperature molten gas in metallurgical furnace, strong corrosive medium in chemical reaction kettle, make tungsten-rhenium electrode and alumina ceramic insulation layer exempt from corrosion, compared with traditional thermocouple service life improves 2-3 times.Simultaneously, spring-like elastic support piece and ceramic powder insulation layer form double anti-vibration structure.

This invention discloses a metal surface rust inhibitor, comprising the following raw materials by mass percentage: deionized water: 80%–90%; organic polyol amine corrosion inhibitor: 6%–16%; heterocyclic high-efficiency corrosion inhibitor: 0.5%–3%; water-based film-forming agent: 2%–7%; nonionic low-foaming surfactant: 0.2%–1.5%; pH adjuster: 0.3%–1.5%; defoamer: 0.05%–0.3%. This invention is completely non-toxic and environmentally friendly, free of nitrites, chromium, nickel, phosphorus, and heavy metals, meeting environmental emission standards. It has a low odor, is easy to clean, non-greasy, and does not affect coating, phosphating, or assembly. It provides long-lasting rust prevention, forms a dense film with strong adhesion, significantly extends the rust prevention period, and is suitable for multiple metals, exhibiting no corrosion to carbon steel, cast iron, galvanized steel, and stainless steel. It has excellent rust prevention performance, is easy to apply, and can be applied by immersion, spraying, or brushing at room temperature, with fast drying.

The invention discloses a method for removing chlorine in waste plastic pyrolytic oil by using alkali metal hydride, which comprises the following specific steps: S1, adding waste plastic pyrolytic oil into a reactor, then adding alkali metal hydride, and uniformly mixing the waste plastic pyrolytic oil and the alkali metal hydride to obtain a mixed solution; s2, heating the mixed solution to a reaction temperature, and carrying out a dechlorination reaction to obtain an intermediate solution; and S3, adding water into the intermediate solution, and extracting to remove sodium chloride to obtain the dechlorinated plastic oil. According to the method, organic chlorine in the waste plastic pyrolytic oil can be efficiently removed, total chlorine in the waste plastic pyrolytic oil can be removed, the yield of the waste plastic pyrolytic oil can be guaranteed, the dechlorinated waste plastic pyrolytic oil meets the subsequent processing requirements, and the corrosion problem is avoided.

The application discloses an improved preparation and refining method of 2-hydroxy-4-methylthio-butanoic acid isopropyl ester, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: raw material pretreatment, esterification reaction and post-treatment. In the esterification reaction, a raw material mixture and dichloromethane are added into a four-necked flask with a condensing device, the temperature of the four-necked flask is controlled to 85-90 DEG C, stirring is carried out, then a solid acid catalyst and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride are added, stirring is carried out for 6-7 h, and a reaction solution is obtained. The preparation method of the solid acid catalyst comprises the following steps: preparing a carrier, primary impregnation modification and secondary impregnation modification. The application can improve the purity of the prepared 2-hydroxy-4-methylthio-butanoic acid isopropyl ester, does not cause corrosion of production equipment, and uses a catalyst with high catalytic activity and high thermal stability, which is not prone to blockage in use and can be used repeatedly.

The application provides a preparation method of an agricultural nanometer friction power generation electrode interface modification material, and belongs to the technical field of nanometer material preparation, and comprises the following steps: step 1, preparation of a nanometer titanium dioxide sol; step 2, preparation of a polypyrrole / titanium dioxide composite sol; step 3, pretreatment of an agricultural-grade red copper foil electrode; step 4, spraying and coating of the composite sol; and step 5, solidification and shaping to form a nanometer modification layer. The modification material prepared by the application can effectively inhibit solid-liquid interface polarization after coating, significantly improve the charge storage and transmission efficiency of the electrode, and optimize the output performance of a power generation device. The modification layer prepared by the application has strong adhesion with the copper foil, is resistant to high temperature and high humidity in agricultural environments, does not fall off or corrode, improves the electrode adaptability and service life, and guarantees stable power generation output. The application adopts a sol-gel method for preparation, discards traditional complex modification processes, has a simple process, raw materials are easy to obtain, and the cost is low, and is suitable for large-scale production and agricultural practical application.

The utility model relates to a kind of lead protection mechanism on refrigerator fan, including upper shell and lower shell;Two to four resting grooves for resting wiring harness and the insertion slot for fixing metal terminal are equipped on lower shell, and the rear end of insertion slot is communicated with resting groove;Two to four limiting grooves for limiting wiring harness and injection hole are equipped on upper shell, and limiting groove is compatible with the front end of resting groove, and the upper shell compatible with resting groove is equipped with injection cavity, and injection hole is communicated with injection cavity;Protection unit and clamping unit are equipped along the length direction of upper shell and lower shell, and upper shell and lower shell are fixed by clamping unit limiting clamping, and protection unit is located in the inside of clamping unit;The utility model is equipped with resting groove, injection cavity and injection hole in upper and lower shell, when refrigerator is running for a long time and accompanied by sufficient water vapor, can prevent metal terminal from not producing corrosion phenomenon, to improve the service life of fan motor.

The application relates to the technical field of injection molding and discloses a feeding device and method of a circuit breaker shell injection molding machine, which comprises a feeding hopper connected with the injection molding machine, a mixed dehumidification assembly is connected with a feeding end of the feeding hopper through a pipeline, a feeding pipe is arranged at the feeding end of the mixed dehumidification assembly, at least two feeding ends are arranged on the feeding pipe, and two feeding ends are respectively connected with storage assembly one and storage assembly two. The air is dried in the mode of the dehumidification film, the dehumidification process continuously proceeds, there is no corrosion problem, no valve switching is needed, there is no moving part, the system has high reliability, is easy to maintain, has small energy consumption, has low maintenance cost and the like, meanwhile, dry gas generated by the device drives the material to be transported, so that the material can be fed and dehumidified at the same time, in addition, the mixed dehumidification assembly can further improve the dryness of the mixture by mixing the plastic particles and the additive materials at the same time.

The invention discloses a synthesis method of an antioxidant GM, which comprises the following steps: (1) under the protection of nitrogen, mixing 2-tert-butyl-4-methylphenol and a functionalized acidic ionic liquid, stirring and heating, dropwise adding acrylic anhydride, carrying out heat preservation reaction after dropwise adding, filtering, separating and washing to obtain 2-acrylic acid-2-tert-butyl-4-methylphenyl ester; and (2) under the protection of nitrogen, mixing 2-acrylic acid-2-tert-butyl-4-methyl phenyl ester, dimethoxymethane, 2-tert-butyl-4-methylphenol, the functionalized acidic ionic liquid, the supported phosphotungstic heteropoly acid and methanol, stirring, heating, carrying out reflux reaction, filtering, separating, washing, carrying out reduced pressure distillation, filtering, separating and washing while the mixture is hot, thereby obtaining the antioxidant GM. The functional acidic ionic liquid and the supported phosphotungstic heteropoly acid are adopted, so that the target antioxidant GM with higher purity and yield can be obtained, and better green and environment-friendly development is realized.

This invention discloses a papaya leaf carbon quantum dot and a cleaning agent composition containing the papaya leaf carbon quantum dots. The papaya leaf carbon quantum dots are prepared by a hydrothermal reaction of total alkaloids from papaya leaves and citric acid. This invention also discloses a method for preparing the cleaning agent composition and its application in cleaning air conditioning filters of rail transit vehicles; particularly its application in cleaning air conditioning filters of rail transit vehicles during the poplar and willow catkin season. The cleaning agent composition of this invention has a descaling rate of over 95% and is non-corrosive to equipment. Furthermore, equipment cleaned with this cleaning agent also possesses certain rust prevention, self-cleaning, and surface repair capabilities.

This utility model provides an atmospheric pressure high-efficiency electrode boiler system, which includes an electric heating tank, an electric heating electrode disposed on the electric heating tank, and an external heat exchange system connected to the electric heating tank; the electric heating tank is filled with high-carbon molecular heating oil; the electric heating tank is provided with a reaction additive addition port; the electric heating electrode is inserted into the high-carbon molecular heating oil; the external heat exchange system includes a first circulation pump connected to the electric heating tank and a heat exchanger connected to the outlet of the first circulation pump; the heat exchanger is connected to the load side; the inlet of the first circulation pump is connected to the outlet of the electric heating tank; the outlet of the first circulation pump is connected to the heat source side inlet of the heat exchanger; the heat source side outlet of the heat exchanger is connected to the inlet of the electric heating tank. This utility model has the characteristics of low manufacturing cost, stable, safe and energy-saving system.

The application discloses a preparation method of 2,4-dichlorophenoxyacetic acid synthesized by composite molecular sieve ZSM-5 and a water-reducing process, and relates to the following steps: under alkaline conditions, 2,4-dichlorophenol is reacted with a sodium chloroacetate solution under the catalysis of a composite molecular sieve catalyst to obtain 2,4-dichlorophenoxyacetic acid sodium salt crude product through condensation; and then hydrolysis and hydrochloric acid acidification are carried out to obtain 2,4-dichlorophenoxyacetic acid product. The process can reduce energy consumption, shorten reaction time and reduce production cost in obtaining 2,4-dichlorophenoxyacetic acid, and can improve the conversion rate and yield of the product and the color of the product. When a new batch of 2,4-dichlorophenoxyacetic acid sodium salt crude product is dissolved in the acidification reaction, the washing water of the last batch of 2,4-dichlorophenoxyacetic acid is used as the solvent reaction liquid, and the washing water of the last batch is used for the first water washing of the final product and is used in turn. The water consumption is reduced, the wastewater treatment cost is reduced, the conversion rate and yield of the product are improved, the product has high purity, the process is simple, the conditions are mild, and the raw materials can be recycled.

The utility model discloses a condensing unit for commercial application, which comprises a support structure, a condenser, a condenser fan motor, a compressor, a liquid receiver, a suction valve and a distribution box. Wherein the condensing unit further comprises a water tray, and the water tray is arranged below the supporting structure and is detachably attached to the supporting structure.

A vulcanization preventive rubber and an article with metal. The vulcanization preventive rubber comprises a (meth)acrylate polymer with siloxy group and 0.5 wt% to 5 wt% of a benzotriazole component with siloxy group. The (meth)acrylate polymer with siloxy group is formed by polymerization of a reaction mixture. The reaction mixture comprises a (meth)acrylate component and a thermal initiator. The (meth)acrylate component includes a siloxane monomer and 80 wt% or more and less than 100 wt% of (meth)acrylate alkyl ester. The amount of the thermal initiator is 0.05 wt% to 1.0 wt% based on the total amount of the reaction mixture being 100 wt%. By the above components, the vulcanization preventive rubber has excellent vulcanization resistance, so that the article with metal can be used in a sulfur-containing environment without corrosion caused by the presence of sulfur.

This document provides a method for peeling a composite by immersing it in a stripping solution, wherein the composite comprises a metal substrate and a coating applied to one or both sides of the metal substrate, wherein the coating comprises a polymer binder, and wherein the polymer binder comprises an aqueous copolymer. Using a stripping solution containing a strong alkali allows for complete peeling of the composite in a highly efficient and extremely fast manner. Furthermore, the stripping method disclosed herein avoids complex separation processes, contamination and corrosion of the metal substrate, and enables excellent material recovery. This document also discloses an application of a method for stripping electrodes from a battery.

This invention discloses a vibration-type respiratory sputum clearance device, relating to the field of medical device technology. It includes a vest body. Multiple independent liquid-coupled vibration units are arranged on the inner side of the vest, corresponding to the upper and lower lobes of both lungs and the projected lung region on the back. Each liquid-coupled vibration unit includes a sealed liquid-sealed bag, and a vibration unit is disposed on the outer side of each sealed liquid-sealed bag. The sealed liquid-sealed bag is integrally embedded and fixed in a flexible interlayer on the inner side of the vest. The interior of the sealed liquid-sealed bag is filled with a vibration-transmitting liquid. The vibration-transmitting liquid filled in the sealed liquid-sealed bag of this invention, relying on its incompressible and highly fluid physical properties, can efficiently transmit and convert the high-frequency micro-vibrations generated by the double-layer piezoelectric sheet, forming a dual mechanical action of shallow loosening and deep oscillation, perfectly adapting to the sputum clearance needs of the soft tissues of the chest and back and the deep airways of the thoracic cavity.

The invention relates to an environment-friendly aluminum alloy cleaning agent, which comprises the following components in percentage by weight: 3.0 to 8.0 percent of biodegradable chelating agent, 8 to 16 percent of carbonate or bicarbonate, 2 to 6 percent of organic acid salt, 0.1 to 3.0 percent of anionic surfactant and the balance of water, the pH value of the cleaning agent is 7.5 to 9.5. The invention further claims to protect an aluminum alloy cleaning method using the environment-friendly aluminum alloy cleaning agent. The aluminum alloy cleaning method comprises the following steps: heating the cleaning agent; immersing the aluminum alloy product into the cleaning agent; keeping contact; and washing with clear water and drying. The aluminum alloy cleaning waste liquid treatment method comprises the steps that waste liquid is collected; adding an acidic regulator to regulate the pH value to 6.0-7.0; adding a flocculating agent and stirring; standing and precipitating; and separating supernate and sediment. The formula is flexible, and the waste liquid can be discharged after reaching the standard after being simply treated; and the device is particularly suitable for industrial application and small-batch cleaning operation of an aluminum alloy profile extrusion production line. The cleaning agent is high in cleaning efficiency, free of corrosion to aluminum alloy base materials and excellent in environmental protection performance.

The utility model relates to waste heat power generation water treatment technical field, and disclose a kind of waste heat power generation circulating cooling water treatment system, electric pulse scale inhibition system is equipped with two groups and is respectively installed on processing pipe A and processing pipe B, adopts the technology that electromagnetic pulse and ultrasonic wave are combined, the attachment of scale formation in pipeline is prevented by generating electromagnetic pulse and ultrasonic wave vibration;Filtering mechanism is equipped with two groups and is respectively installed in the back of each electric pulse scale inhibition system and is used to filter and remove scale impurities in water body;Ultraviolet sterilization tank is equipped with two groups, one group of ultraviolet sterilization tank is installed between the filtering mechanism of front side and processing pipe B, another group of ultraviolet sterilization tank is installed in the back of the filtering mechanism of back side. Adopt pure physical processing mode, by electric pulse scale inhibition, filtration and ultraviolet sterilization multistage processing, without chemical reagent, can efficiently scale inhibition sterilization, reduce equipment corrosion, reduce pollution discharge, and degree of automation is high, maintenance cost is low, avoid secondary pollution.

The application discloses a composite powder reinforced radiation refrigeration coating and a preparation method thereof, and relates to the technical field of coating.The multistage surface modification functional powder, the water-based polyurethane resin and the polyisocyanate curing agent are used, the problems of unbalanced radiation refrigeration performance, slow drying speed, poor mechanical performance and environmental stability, and insufficient weather resistance of the existing coating are solved, the application scenarios of efficient cooling, weather resistance, corrosion resistance and long-term stable service are met, and the coating can be widely applied to the fields of building outer walls, metal components, cold chain equipment, outdoor facilities and the like.