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42results about How to "Prevent approach" patented technology

Bidirectional alternative integral sealing device for main drive of tunnel boring machine

The invention discloses a bidirectional alternative integral sealing device for main drive of a tunnel boring machine. The device comprises a boring machine adapter flange, a boring machine supportingring and an integral seal. A positioning ring is arranged outside the boring machine supporting ring. The integral seal comprises a base body, three sealing rings and a detection ring. The cross section of the base body is of an L-shaped structure, the tail end of the radial part is provided with a hydrophobic layer, and the tail end of the axial part is provided with a positioning hook; the outer part of each sealing ring is annular, the inner part of each sealing ring is a U-shaped labyrinth ring cavity, each sealing ring is provided with a first outer framework, a first inner shell, a first limiting block, a second limiting block, an axial seal, a first radial seal and a second radial seal, the outer part of the detection ring is annular, the inner part of the detection ring is a U-shaped labyrinth ring cavity, and the detection ring is provided with a second outer framework, a second inner shell, a third limiting block, a fourth limiting block and a third radial seal. The base body hydrophobic layer, the axial seals, the radial seals and the labyrinth ring cavities are integrated, meanwhile, sealing grease is injected, and the device has the advantages of good sealing performance, long service life, small disassembly and assembly difficulty, low maintenance cost and the like.
Owner:DALIAN UNIV OF TECH

Field direct-seeding seedling raising device

The invention discloses a field direct-seeding seedling raising device and relates to seeding and seedling protection devices for crop field direct-seeding seedling raising. The field direct-seeding seedling raising device is composed of a pot body and a pot cover. The field direct-seeding seedling raising device is capable of comprehensively protecting seeds and seedlings of crops in a filed in various aspects such as drought prevention, waterlogging prevention, disease resistance, insect resistance, weeding, and soil-hardening prevention, and guaranteeing that the quantity of the crop seedlings is sufficient, lengths of the crop seedlings are even, and the crop seedlings are strong. The field direct-seeding seedling raising device is composed of the pot body and the pot cover. Insecticide is coated on the device before seeding and herbicide is coated on the device after the seeding. Half of the seedling raising device is buried in soil during seeding and the seeds are planted in the seedling raising device. The pot cover needs to be covered on the pot body in order to achieve drought prevention, rain prevention, and torrential rain prevention. The pot cover needs to be opened in order to guarantee that the seedlings can receive sufficient light after parts of seeds emerge. And when the seedlings grow up, the seedling raising device is removed out of the field.
Owner:ANHUI SCI & TECH UNIV

Alkyl polyhydroxy quaternary ammonium salt and preparation method and application of alkyl polyhydroxy quaternary ammonium salt

InactiveCN107721863ASolve poor compatibilitySuperior ConditioningCosmetic preparationsHair cosmeticsMoisture retentionChemistry
The invention belongs to the technical field of chemical products, synthesis of the chemical products, and textile posttreatment, and particularly relates to an alkyl polyhydroxy quaternary ammonium salt and a preparation method and application of the alkyl polyhydroxy quaternary ammonium salt. The structural formula of the alkyl polyhydroxy quaternary ammonium salt is shown in the description. The preparation method of the alkyl polyhydroxy quaternary ammonium salt comprises the step of adding CH2CHOHCH2OH to RNH2 for three times for reaction to obtain the alkyl polyhydroxy quaternary ammonium salt. The alkyl polyhydroxy quaternary ammonium salt has the advantages that the alkyl polyhydroxy quaternary ammonium salt is in a tetrahedral structure, an R group is on one side, a CH2CHOHCH2OH group is on the other three sides, the alkyl polyhydroxy quaternary ammonium salt is excellent in conditioning property, moisture retention and water solubility, the difficult problems that the alkyl cation quaternary ammonium salt only has the conditioning property but does not have the moisture retention property or is poor in moisture retention property and water solubility are solved, so that the alkyl polyhydroxy quaternary ammonium salt not only can be widely used as a conditioning agent and a wetting agent in the products like a hairdressing gel, a hair conditioner, shampoo and a showergel, but also can be used as a softening agent in the products like a laundry detergent and in the textile posttreatment.
Owner:广州市润研基因科技有限公司

Electric pulse shark expelling device

PendingCN112154980APrevent approachAchieve the purpose of repelling sharksAnimal repellantsFishingEngineeringHigh voltage pulse
The invention discloses an electric pulse shark expelling device. The electric pulse shark expelling device comprises binding belts and a box body, wherein the binding belts comprise a main binding belt and an auxiliary binding belt, and an electrode set is arranged on the outer surface of the front end of the main binding belt; and a power switch is arranged on the outer surface of one side of the box body. According to the electric pulse shark expelling device, shark expelling technical research is carried out through the arranged electric pulse shark expelling device and the characteristicthat an Ampullae of Lorenzini electric sensing system exists at the mouth and the nose of a shark, namely, the shark can recognize weak electronic pulses in received water, and therefore the shark isfar away from a transmitting source, an underwater high-voltage pulse probe transmitting technology is researched, high-voltage pulses capable of causing spasm of the shark Ampullae of Lorenzini existin the transmitting area, so that the purpose of expelling sharks is achieved, the sharks are automatically and effectively prevented from approaching swimmers, it is guaranteed that the swimmers areprevented from being hurt by the sharks during offshore work or swimming, intelligent shark prevention is achieved, and the device has the advantages of being simple in structure, small in size, lessin weight and convenient to wear.
Owner:中国人民解放军海军特色医学中心

Bidirectional Alternating Integral Sealing Device for Tunnel Boring Machine Main Drive

The invention discloses a bidirectional alternate integral sealing device used for the main drive of a tunnel boring machine, which comprises a tunnel boring machine adapter flange, a boring machine support ring and an integral seal. A positioning ring is installed on the outside of the support ring of the roadheader. The integral seal includes the base body, 3 sealing rings and 1 detection ring. The cross section of the base body has an L-shaped structure, the end of the radial part is incorporated into the hydrophobic layer, and the end of the axial part is provided with a positioning hook; the outer part of the sealing ring is annular, and the inner part is a U-shaped labyrinth ring cavity, which is equipped with a first outer skeleton, a first inner The casing, the first limit block, the second limit block, the axial seal, the first radial seal and the second radial seal. The outer frame, the second inner shell, the third limit block, the fourth limit block and the third radial seal. The invention integrates the base hydrophobic layer, the axial seal, the radial seal and the labyrinth ring cavity into one body, combined with the injection of sealing grease, and has the advantages of good sealing performance, long service life, less difficulty in disassembly and assembly, and low maintenance cost.
Owner:DALIAN UNIV OF TECH

Composition for treating inflammatory bowel diseases

The invention discloses a composition for treating inflammatory bowel diseases, belonging to the field of medicines. The composition is prepared from the following components: lucid ganoderma, radix salviae miltiorrhizae, poria cocos, glutamine, threonine, serine, cysteine, vitamins C, E and A, and beta-carotene. Lucid ganoderma, radix salviae miltiorrhizae and poria cocos have the efficacy of boosting the blood supply and the oxygen supply for the human body; glutamine is the major energy source of the intestinal mucosa; threonine, serine and cysteine are the constituent parts of mucoprotein; vitamins C, E and A, and beta-carotene have the effects of suppressing the activity of oxygen free radicals, eliminating the oxygen free radicals, and protecting the human cells. The composition provides nutrition, oxygen and raw materials for the generation, renewing and repair of goblet cells, and the process that the goblet cells secrete mucoprotein to form a slime layer barrier for the surface of the intestinal tract. The composition has obvious effects in terminating the inflammation, repairing the intestinal tissue, and establishing the normal slime layer barrier for the surface of the human intestinal tract, and belongs to an effective composition for treating the inflammatory bowel diseases.
Owner:何松庆
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