50results about How to "No shedding problem" patented technology

The invention discloses a continuous casting monolithic stopper and a method of manufacture thereof.The monolithic stopper comprises a stopper body, a steel core inserted into the stopper body and a head connected to the lower end of the stopper body, the surface of the steel core is provided with an anchor, the surface of the monolithic stopper is coated with Al2O3 coating; the stopper body is made by casting castables comprising mullite, the head is made by casting castables comprising corundum and sintered mullite, and the monolithic stopper is manufactured by monolithic casting.The stopper obtained herein is good in monolithicity, is free of brick joint and head shedding problems of sleeve brick stoppers, has good thermal shock resistance, high strength and good resistance to molten steel scour erosion, is simple to manufacture and low in cost, and is suitable for stopping a tundish nozzle under low continuous casting, high-oxygen steel continuous casting and skid flow control.

The invention belongs to the field of filtration materials, and discloses a preparation method of a silicon nitride fiber filtration material. The preparation method of the silicon nitride fiber filtration material comprises the steps that polyurethane foam is soaked in metal silicon slurry containing nitrogen auxiliaries, the polyurethane foam soaked with the metal silicon slurry is dried and put in a nitrogen furnace to conduct nitridation sintering, metal silicon is converted into a silicon nitride material with an alpha phase fiber structure under the action of the nitrogen auxiliaries, and therefore the silicon nitride fiber filtration material is obtained. The silicon nitride fiber filtration material is high in gas permeability, high in strength, high in corrosion resistance and excellent in thermal shock resistance, and the preparation method of the silicon nitride fiber filtration material has the advantages of being cheap in raw material, simple in technology and low in cost.

The present invention relates to a vanadium ion fluid-flow battery. Said invention is characterized by that on the electrochemical principle it uses liquid vanadium ion as active substance, and makes the vanadium ions with different valences produce oxidation reduction reaction to store or release electric energy.

A light catalyst water treatment tank forms a space for containing water on tank wall, nano-light catalyst thin film is coated on internal wall, at least one luminescent diode is arranged at wall of light catalyst treatment tank, whose light source is projected nano-light catalyst thin film. The luminescent diode can be arranged in space for containing water of light catalyst water treatment tank with light-source producing module mode. Multiple diversion plates are arranged in light catalyst water treatment tank to form circulation path. Light source for triggering the nano-light catalyst thin film reaction is provided by luminescent units arranged between adjacent diversion plates.

The invention discloses a weather-resistant high-voltage-resistant cable sheath material, and the preparation method comprises the following steps: putting metallocene polyethylene, ethylene-vinyl acetate resin, 5-8 parts of polymethyl methacrylate, a composite environmental-friendly heat stabilizer, micro encapsulated red phosphorus, expandable graphite, polyethylene wax and a super lubricant into a low speed kneader for mixing evenly; putting phthalate, conductive metal powder, carbon fiber, calcined clay, talcum powder and an antioxidant in the low speed kneader for mixing evenly with the obtained material, then putting the prepared material into a high speed kneader for heating for mixing evenly at a high speed, and cooling; sending the obtained material into a twin-screw granulator for extrusion granulating, and drying to obtain the high-voltage-resistant cable sheath material. The weather-resistant high-voltage-resistant cable sheath material is excellent in high-voltage-resistant performance, free of falling off, higher in hardness and good in thermal stability.

The invention relates to a defect-state TiO2/Fe3O4 composite nanofiber material and a preparation method thereof, and belongs to the technical field of materials. The preparation method of the material comprises the following steps: firstly, dispersing a titanium source, an iron source and a high-molecular polymer in a solvent to prepare a stable and uniform solution; then preparing the solution into a nanofiber membrane through an electrostatic spinning technology; and calcining the nanofiber membrane, grinding the calcined material and sodium borohydride, and reducing in a nitrogen atmosphere to obtain the defect-state TiO2/Fe3O4 composite nanofiber material. The method is simple to operate, easy to control, environment-friendly and capable of realizing continuous production, and the obtained defect-state TiO2/Fe3O4 composite nanofiber material has good crystallinity and photoresponsiveness and has excellent degradation performance on organic pollutants in a water environment.

The invention discloses a preparation method of a nano-modified film material capable of improving surface electrical resistance of a polymer insulating material. Silane modified perfluoropolyether and KH570 are grafted to the surface of a nanoparticle material by ultrasonic, suction filtration and drying steps in a silane coupling mode, and modified nano powder is prepared; the modified nano powder is added to light-cured resin, the resin is uniformly applied to the surface of an insulating material after being subjected to ultrasonic, stirring and solution dispersion treatment, the resin israpidly cured by ultraviolet source irradiation, and the nano-modified film material is obtained. Through combination with the advantages of photocuring, rapid coating of the surface of the insulatingmaterial is realized, the demand of improving the electrical resistance is met, and the problems of low timeliness and high cost of a traditional fluorination method are solved while the treatment speed is increased; the photocuring technology has huge potential in the aspect of fluorination modification of the surface of the insulating material, and the surface electrical resistance of the insulating material is expected to be improved stably.

The invention discloses novel target furnace equipment, and belongs to the technical field of target bonding. A furnace door is arranged on one side of a furnace body of the novel target furnace equipment; the furnace body is internally provided with a heating base station; the heating base station is internally provided with a heating device and a temperature detector that are used for temperature control; a target substrate for the placement of a target is connected with the heating base station; a pressurization plate is arranged over the target substrate; the upper end of the pressurization plate is connected with a hydraulic pump located outside the furnace body; and the interior of the furnace body communicates with an external vacuum pump. The novel target furnace equipment is simple in manual procedures and high in target bonding efficiency; through calculating a welded area and the mass of indium spheres, a situation that a utilization ratio of an indium material is above 98% can be guaranteed; air and water steam in the target and the target substrate can be reduced effectively through vacuumizing, and a situation that the welded area is above 97% can be guaranteed; the binding force between the target and the target substrate can be increased effectively through pressure control, and no falling problem occurs in the post sputtering process; and a yield of target bonding by a skilled worker can reach 100%.

The invention discloses a network transformer and a laser welding method thereof. The network transformer comprises a linear ceramic flat plate and a ceramic skeleton which are both made of oxide ceramic matrix composite materials. The attaching positions of the linear ceramic flat plate and the ceramic skeleton are welded into a whole through laser. The method comprises the following laser steps:S1, grinding and polishing an area where the ceramic flat plate and the ceramic skeleton are about to be combined together, and grinding the area into a smooth welding crystal face; S2, positioning the ceramic flat plate and the ceramic skeleton in a laser beam irradiation area, adopting the pulse oscillation mode of a laser device with a large output power peak value, irradiating a non-focused laser beam on the above combination area for preheating purpose, utilizing the focused laser with high energy density for irradiation purpose, fusing and welding together the combination area of the ceramic flat plate and the ceramic skeleton; S3, naturally cooling the ceramic flat plate and the ceramic skeleton to form a whole piece. According to the invention, the high-temperature fusion weldingof the laser is utilized, so that the skeleton of the transformer is permanently combined without the problem of falling off. Meanwhile, additional structural parts are omitted, and the structure is simplified.

The invention discloses a preparation method of a high-voltage-resistant high hardness cable sheath material, and the method comprises the following steps: weighing PVC (polyvinyl chloride) resin, ethylene-vinyl acetate resin with ethylene-vinyl acetate content of 17.5-19.2%, a composite environmental-friendly heat stabilizer comprising an environmental-friendly Ca / Zn composite stabilizer and epoxy soybean oil, micro encapsulated red phosphorus, expandable graphite, polyethylene wax and a super lubricant to put in a low speed kneader for mixing evenly; weighing phthalate, conductive metal powder, conductive carbon black, calcined clay, talcum powder and an antioxidant to put in the low speed kneader for mixing evenly with the obtained material, then putting the prepared material into a high speed kneader for heating for mixing evenly at a high speed, sending into a twin-screw granulator for extrusion granulating, and drying to obtain the high-voltage-resistant cable sheath material. The high-voltage-resistant high hardness cable sheath material is excellent in high-voltage-resistant performance, free of falling off, higher in hardness and stable in performance.

The invention provides a vacuum cleaner dust cup structure without assembling a rail. The structure comprises a cup body, a front cover, a first locking hook mechanism and a second locking hook mechanism. A first connecting end and a second connecting end are formed at the two opposite ends of the front cover respectively, the first connecting end is connected to a second side part of the cup body, and the second side part is arranged opposite to a first side part and connected to the first side part; the first locking hook mechanism includes a first button, one end of the first button is hinged to the first connecting end, and the other end of the first button is provided with a first clamping hook which is clamped to the second side part; the second locking hook mechanism includes a locking hook base which is fixedly mounted on the first side part, second clamping hooks are disposed on the locking hook base and clamped to third clamping hooks, and the third clamping hooks are connected to the second connecting end. The invention also provides a vacuum cleaner. Compared with the prior art, the structure and the vacuum cleaner have the advantages that user can comfortably assemblea dust cup in a pressing mode and the user experience is improved.

The invention relates to the field of toilet water replenishing structures, in particular to a water replenishing cap which can be quickly installed and is capable of improving the overflow capacity and lowering the water replenishing sound. The water replenishing cap comprises a water replenishing cap body, the water replenishing cap body sleeves an overflow pipe, and the angle above the water replenishing cap body can be freely adjusted. The structure is simple, the water replenishing cap is easy to operate, no falling problem occurs, and the problem of deformation of a water replenishing pipe can be avoided, so that normal water replenishment is ensured. A vent hole is formed in the side wall of the water replenishing cap body, so that the formation of eddy current above a pipe openingof the overflow pipe is prevented, a large amount of air is prevented from entering the overflow pipe, normal drainage of the overflow pipe is ensured, and the overflow speed is increased. A connecting pipe is communicated with the upper end face of the water replenishing cap body, the water replenishing pipe is in interference fit connection with the connecting pipe through a reinforcing rib, a drainage baffle is arranged at an opening of the lower end of the connecting pipe, so that the noise generated by water replenishment is effectively lowered.

The invention discloses an environment-friendly transmission line sheath, which belongs to the field of cable sheaths and is used for transmission line protection. The environment-friendly transmission line sheath comprises the following components in parts by weight: 35-40 parts of metallocene polyethylene, 30-40 parts of ethylene propylene diene monomer rubber, 20-30 parts of chlorinated polyvinyl chloride resin, 2-5 parts of maleic anhydride graft EVA (ethylene-vinyl acetate), 2-3 parts of aluminum hydroxide micropowder, 0.5-1 part of barium stearate and 2-4 parts of antioxidant PS802. According to the technical scheme, the environment-friendly transmission line sheath can overcome the defect of toxic and harmful gas generated in the PVC (polyvinyl chloride) material combustion process, and can avoid the problems of damage and shedding of the graphite layer on the high-tension transmission line.

The invention relates to the technical field of environmental electrochemistry, in particular to a membrane electrode for generating ozone water by using tap water and a preparation method thereof. The membrane electrode comprises an ion exchange membrane, an anode catalyst layer arranged on one side of the ion exchange membrane and a cathode catalyst layer arranged on the other side of the ion exchange membrane, wherein the cation exchange membrane is a porous ceramic-based solid polymer electrolyte membrane or a graphite-phase C3N4/PFSA solid electrolyte composite membrane. The method is widely applied to drinking water disinfection, municipal sewage treatment, medical industry disinfection and the like. According to the membrane electrode, only water is needed as a raw material for producing ozone water from tap water, so that the energy consumption is low; an air pump is not needed, and noise generated in use is low; high-purity ozone is generated, no other by-product is generated,no nitrogen oxide is generated, and no secondary pollution is generated to the environment; the membrane electrode can work for a long time, is stable in electrolysis efficiency, and does not need additional oxygen-containing electrolyte.

The invention discloses a processing method of an acquisition sheet and a busbar connecting structure, and the connecting structure. The connecting structure comprises a busbar and the acquisition sheet. And the busbar is provided with a sheet groove. And a head of the acquisition sheet is clamped in the sheet groove to form a clamping structure between the busbar and the acquisition sheet. And the busbar and the acquisition sheet are connected and fixed in the sheet groove through a riveting portion and a laser welding spot. And the riveting portion is formed in a way that a riveting column arranged in the sheet groove penetrates through a riveting hole arranged in the head of the acquisition sheet and then the riveting column is processed by adopting a hot riveting processing technology.And the laser welding spot is formed after laser welding is performed around a periphery of the riveting portion. Compared with the prior art, by using the method and the structure of the invention,the connecting structure is firm and the acquisition sheet is not easy to fall off.