8results about How to "Wide selection" patented technology

The utility model discloses a kind of super-long engineering pile hoisting systems, including crane, hanger, bottom form, hanger upper stage sling, stage sling is connected on crane, hanger is located at the sleeve set of corresponding stage sling two-stage sling, hanger is connected with its below pile body by two-stage sling, pile body is shaped on bottom form, bottom form is located at two-stage sling place and is all provided with rope slot, cover plate is movably arranged in rope slot.The utility model is characterized by: through the setting of hanger, stage sling, two-stage sling, without pre-buried lifting appliance, pile body is not prone to crack, guarantee the strength and integrity of pile body, facilitate subsequent use, ensure that the force of sling is minimum when hoisting pile body, make the wide range of sling selection, reduce production cost;Through the setting of rope slot, cover plate, solve the problem that two-stage sling is fixed around pile body and hanger, simple structure, convenient operation.

The invention discloses a deep-eutectic solvent and a method for catalyzing biomass to synthesize 5-hydroxymethylfurfural by the deep-eutectic solvent, the deep-eutectic solvent is composed of choline chloride, polyhydric alcohol and lignin-derived phenolic acid, is used as a reaction catalyst and a solvent, can efficiently catalyze biomass to synthesize 5-hydroxymethylfurfural under mild conditions, and is high in product yield and high in product purity. Wide application prospects are realized; the raw materials for preparing the eutectic solvent are cheap and easy to obtain, wide in selection range and suitable for industrial production.

The invention discloses a water-based modified polyamine curing agent and a preparation method thereof. The water-based modified polyamine curing agent comprises 10-38 parts of polybasic organic amine, 1-12 parts of polybasic organic acid, 1-12 parts of unit organic acid, 1-30 parts of an emulsifier, 1-25 parts of epoxy resin, 0-35 parts of an epoxy diluent, 0-22 parts of an alcohol ether solvent, 0-60 parts of deionized water and 0-5 parts of an antioxidant. The water-based modified polyamine curing agent is uniform, fine, good in salt mist resistance, quick to dry, good in adhesive force, good in impact resistance, good in flexibility, good in water resistance, low in cost and the like, and is mainly applied to the fields of containers, rail transit, steel structures and the like.

The invention is suitable for the field of medical instruments, and provides tissue forceps capable of being flexibly controlled in all directions and an operation method.The tissue forceps capable of being flexibly controlled in all directions comprise a forceps head, a front rod, a locking ring, a flexible pipe, a main rod, a rotary knob mechanism, a rotating mechanism and a movement mechanism, and the special structure of the flexible pipe enables the flexible pipe to be flexibly bent in the left-right direction; the tissue forceps are convenient to adapt to different angle and position requirements in surgical operation, instrument interference is avoided, the operation flexibility is improved, and the tissue forceps can be operated more freely in a narrow surgical wound; due to the existence of the rotating mechanism, the whole instrument can freely rotate by 360 degrees in all directions, so that the forceps heads can be bent in all directions, and an extremely wide operation space and angle selection are provided for surgical operation; it is worth mentioning that the closing action of the forceps heads is pulled by the steel belt, even if the flexible pipe is in a bent state, the clamping action can still be stably and reliably completed, and the integrity and effectiveness of the functions of the tissue forceps in the operation process are guaranteed.

The invention provides a method for preparing cold-soluble instant ampelopsis grossedentata powder through double-effect extraction. The method comprises the steps of raw material treatment, double-effect extraction, filtration, settling separation, concentration, blending, sterilization, drying and the like. According to the method, the selectivity of the raw materials is wider, and the cost is reduced while the yield is increased; compared with the traditional process, the process flow is more convenient and faster, the product form and flavor characteristics are richer and more diversified, the raw material utilization rate is higher, and the production energy consumption is lower. The two products can be quickly cold-dissolved at normal temperature, so that the brewing convenience is greatly improved; by adding a certain proportion of beta-cyclodextrine and maltodextrin, substances easy to separate out can be effectively embedded, so that the solubility of the instant ampelopsis grossedentata powder is greatly improved; the two instant ampelopsis grossedentata powder have excellent cold dissolving effects, the content of dihydromyricetin in the two instant ampelopsis grossedentata powder is greater than 25%, and the instant ampelopsis grossedentata powder has an effective health-care function.

The invention relates to a novel derivative of 2-acetamido-6-hydroxy-benzothiophene of general formula I, or a pharmaceutically acceptable salt thereof, which has antiviral activity and can be used for treating viral diseases caused by respiratory RNA viruses, influenza viruses or coronaviruses. The primary use of the claimed compounds is for treating diseases where the virus is an influenza virus or the coronavirus SARS-CoV-2 and the disease is influenza A or COVID-19.

The invention relates to a coating, in particular to a heat shrinkage resistant waterproof coating and a preparation method thereof; the heat shrinkage resistant waterproof coating comprises an A component: 100-130 parts of waterborne acrylic modified polyurethane resin, 10-20 parts of quartz, 5-10 parts of easily dispersible modified magnetic powder, 5-10 parts of hollow glass beads, 1-3 parts of mannitol and 2-4 parts of polyether modified polysiloxane; and a B component: 15-20 parts of polyester fiber, 15-20 parts of titanium dioxide modified bamboo charcoal, 1-1.5 parts of heat shrinkage modified nano cellulose, 2-4 parts of sodium tripolyphosphate and 30-40 parts of deionized water; the polyester fiber is used to provide the coating with the necessary shrinkage performance when the base surface is heat shrunk, and the heat shrinkage modified nano cellulose is used to further improve the shrinkage rate of the coating during the heating process, so as to compensate for the reduced shrinkage performance of the coating when the length error of the polyester fiber is large, thereby making the heat shrinkage coating have a wider selection range for the polyester fiber.