54results about How to "Protective properties" patented technology

The invention belongs to the technical field of weaving, in particular to a production method of kapok fiber spunlaced nonwoven fabric. The method includes: pretreating kapok fiber to improve spinnability; using a weighing curtain feeder to feed kapok fiber into a blowing-carding device for opening, blending and purification; using an induced fan to collect web in a blowing-carding machine to feed into a tiny dust removing device for further dust removing and opening; connecting the tiny dust removing device with a spunlaced line carding machine, carding the fiber into web on the spunlaced line carding machine, cross lapping, spunlacing to form fabric, coiling, degreasing and bleaching, drying and slitting to obtain the finished product. The method is safe, environment-friendly, energy-saving, efficient, high in automation level, and advanced in spunlaced kapok nonwoven fabric weaving, and various characteristics of fiber raw materials are protected effectively.

The invention relates to a method and a device for correlated micro-imaging of a frozen light microscope and a frozen electron microscope, in particular to a method and a device for correlated imaging of a frozen light microscope and a frozen transmission electron microscope, including an optical microscope frozen object stage device used for optics-electron correlated micro-imaging and a corresponding correlated imaging method. By adopting the method and the device, optical micro-imaging at extra-low temperature (below minus 170 degrees) can be achieved, and frozen electron micro-imaging of the same samples in the same areas can also be achieved. The method and the device can be widely used to correlate various types of inverted optical microscopes and most transmission electron microscopes at the market, can achieve correlated imaging fast, conveniently and accurately, prevent ice crystals from forming on surfaces of the samples to the maximum extent, avoid problems of grid deformation and carbon film fracture, and can be widely applied to related research of cytobiology, neurobiology, biological medicines, etc.

The hollow cellulose fiber gas humidifying membrane is homogeneous compact structure prepared through direct dissolving cellulose with N-methyl morpholine monohydrate as solvent and spinning vian immersing phase converting process. The preparation process includes: dissolving cellulose with 80-93 % concentration MMNO.H2O at 80-110 deg.c and debubbling to obtain membrane forming liquid of 7-20 wt% cellulose concentration; spinning hollow membrane through immersing phase converting process; washing to eliminate residual solvent in the membrane; and drying naturally to obtain dry hollow membrane. The cellulose fiber gas humidifying membrane thus prepared has high crystallization degree, high mechanical strength, high organic solvent, acid and alkali resistance, high water penetrating capacity, and small oxygen and hydrogen osmosing coefficient, and is very suitable for use in gas humidifying system in fuel cell.

The invention relates to a non-washing type automobile essence and a preparation method thereof. The non-washing type automobile essence mainly comprises the following components in percentage by weight: 15 percent of sodium dodecyl benzene sulfonate, 5 percent of aqueous montan wax, 20 percent of dimethicone, 3 percent of oleic acid, 15 percent of glycerol, 5 percent of fatty alcohol-polyoxyethylene ether, 3 percent of emulsifier, 32.5 percent of ionic water, and 1.5 percent of waterproofing agent. The invention has the advantages that the non-washing type automobile essence quickly penetrates, ensures that a gap is generated between stains and an automobile paint, and forms a protective layer between sandy soil particles and the automobile paint, the generated wax water isolates the stains from the automobile paint at the periphery of the stains, a surfactant is used for removing the stains, a phenomenon that sand and stains slide and flow on the paint surface is generated, and the sand and the stains are lightly wiped by a towel and adhered to the towel; meanwhile, a polishing towel is used for drying and attaching a layer of protective film, so that the automobile film is bright; the harm of rain, snow, wind, sand and the like to an automobile body is effectively reduced, and the luster of the mirror surface of the automobile paint is protected against damage; and the invention has the greatest advantage of saving water resources.

The invention discloses a high-extensibility anti-pilling fiber blended wrap yarn and a preparation method thereof. The high-extensibility anti-pilling fiber blended wrap yarn comprises a spandex core yarn and a wrapping layer wrapping the spandex core yarn, wherein the wrapping layer is formed by blending PTT fibers, soybean fibers, cotton fibers, wool fibers, linen fibers, polyester filament yarns and chinlon yarns. The invention further provides a preparation method for preparing the high-extensibility anti-pilling fiber blended wrap yarn. For the high-extensibility anti-pilling fiber blended wrap yarn prepared by the preparation method provided by the invention, during the blending processing of the natural fibers including wool, linen, and cotton and artificial fibers, the wrapping twisting technology is adopted, so that the cohesive force among the fibers is enhanced, the intrinsic properties of the fibers are effectively protected, the prepared high-extensibility anti-pilling fiber blended wrap yarn has good elastic recovery property, and also has the properties of high strength, high extensibility, high elasticity, and the like, the serious pilling phenomenon and other phenomena of the fibers during the use process are prevented, and the technical problem that the existing blended product can not meet the requirements of the high-grade products is solved.

The invention discloses a superamphiphobic self-cleaned fluorosilicone coating material which comprises raw materials, namely a fluorosilicone amphiphobic treatment agent and a solvent, wherein the fluorosilicone amphiphobic treatment agent is prepared from an amino alkyl silane coupling agent and a hexafluoro oxygen-containing propane tripolymer in a mole ratio of 1 to 1 through reactions at onestep; the solvent is an alcohol or water-alcohol mixed agent. The invention further discloses a method for preparing a superamphiphobic self-cleaned coating from the coating material. The method comprises the following steps: brushing or spraying the prepared coating material to the surface of a substrate, so as to obtain thesuperamphiphobic self-cleaned coating after the solvent is completely volatilized. The fluorosilicone coating material disclosed by the invention is simple in preparation process, a small number of types of raw materials with low cost are used, in addition, the material isfree of toxic and / or side effects on human beings or the environment. The prepared coating has superamphiphobic and self-cleaned functions, meanwhile has pH value stability and durability, and in addition is reversible in coating process, free of damage to base material surface colors or air permeability, applicable to nearly all building base material surfaces, and applicable to on-scale industrial production.

The invention provides an active imaging readout circuit working on a linear mode APD (Avalanche Photo Diode) array. The circuit is provided with a probe, a high voltage protective circuit, an injecting circuit, a comparator and a voltage retaining circuit; the output of the probe is connected with the input of the high voltage protective circuit; the output of the high voltage protective circuit is connected with the input of the injecting circuit; the output of the injecting circuit is connected with the input of the comparator circuit; the output of the comparator circuit is connected with the input of the high voltage retaining circuit; the output of the voltage protective circuit is connected with the injecting circuit and a subsequent processing buffer circuit; and the output of the injecting circuit is further connected with the subsequent processing buffer circuit.

The invention discloses a filtering method and device based on multichannel noise detection, and the method comprises the steps: obtaining a to-be-detected color image; carrying out the detection of noise points of each color channel of the color image, and obtaining three sub-channel noise identification matrixes; obtaining the noise identification matrix of the color image through the sub-channel noise identification matrixes; carrying out the filtering of pulse noise points in the color image according to the noise identification matrix of the color image, and obtaining a filtered image. According to the invention, the method and device can quickly and effectively inhibit pulse noises, enables the capability of protecting the image edge information and detail features to be more excellent, and improves the image filtering speed and accuracy.

The invention discloses a microcapsule chicken essence seasoning and a preparation method thereof. The microcapsule chicken essence seasoning is prepared from the raw materials including white granulated sugar, table salt, sodium glutamate, chicken meal, maltodextrin, an edible essence, ginger powder, garlic powder, pepper powder, sesame, peanut, hydrolyzed vegetable protein, a yeast extract, expanded rice powder, carrot, ethyl maltol, basil, purple perilla, thyme, cordia dichotoma, myrcia, platycladi seeds, red tangerine peel, Himalayan teasel root, simple-leaf shrub chastetree fruits, humifuse euphorbia herb, and radish seeds according to certain parts by weight. The microcapsule chicken essence seasoning is rich in multiple nutritional ingredients, and on the basis of an original seasoning production process, the oxygen, light and heat resistances of the seasoning are greatly improved and the processability and the stability of a product are improved by virtue of a microencapsulation technology, so that the microcapsule chicken essence seasoning has a broad application prospect.

The invention discloses a preparation technique of a high-oil-load DHA (docosahexaenoic acid) algae oil microcapsule powder. The whole microcapsule powder is composed of 48-65 wt% of outer layer wall material, 33-50 wt% of core material, 1.2-1.5 wt% of emulsifier and 0.5 wt% of antioxidant. The preparation technique comprises the following steps: dissolving the outer layer wall material and emulsifier in water, uniformly mixing at 50-60 DEG C, carrying emulsification shearing to obtain a pre-emulsified solution, adding the core material and antioxidant, continuing the emulsification shearing, homogenizing twice with a high-pressure homogenizer under the pressure of 40-60 MPa to obtain an end emulsion, and carrying out spray drying on the end emulsion to obtain the high-oil-load DHA algae oil microcapsule powder, wherein the air inlet temperature for the spray drying is 180-210 DEG C, and the air outlet temperature is 80-100 DEG C. The microcapsule powder can protect the primary characteristics of the DHA, enhance the stability of the DHA and prolong the shelf life, and thus, has an important action on enhancing the utilization ratio of the DHA and widening the application range of the DHA.

The invention discloses a boiler make-up water purification system. The system includes a multimedium filter, a heat exchanger, a security filter, a high pressure pump, a reverse osmosis system, a carbon, carbon remover, a water tank arranged on the lower part of the carbon remover, a mixed bed water conveying pump, an ion exchange mixed bed, a particle filter, a desalination water tank and a desalination water pump; and the system also includes a dosing system arranged between the heat exchanger and the security filter and an ammonia addition system set up at the water outlet end of the desalination water pump. According to the boiler make-up water purification system of the invention, the multimedium filter uses quartz sand and active carbon to remove impurities of colloid, mud and suspended solids in tap water; the reverse osmosis system can remove 99.9% of organic matters and bacteria and 98% of salts in the water; and the ion exchange mixed bed exchanges the ion state substances in water to obtain high purity deionized water, so as to ensure the long term operation of the boiler without scaling.

The invention discloses a lotus leaf compound composition prepared by adopting a method for combining fractional ultrafiltration and superfine grinding, and belongs to the fields of traditional Chinese medicines and food industry. The lotus leaf compound composition is mainly prepared from the following raw materials in parts by weight: 10-20 parts of lotus leaf, 6-12 parts of pericarpium citri reticulatae, 1-5 parts of fructus crataegi and 1-5 parts of flos chrysanthemi. The compound composition can clear summer heat and dampness, send up the lucid yang, help digestion, tonify the spleen, regulate the flow of qi, eliminate dampness, promote fat metabolism and lipolysis, and maintain normal physiological functions. According to the preparation method, a technology for combining fractionalultrafiltration and superfine grinding is adopted for preparing the lotus leaf compound composition, fractional ultrafiltration and superfine grinding are adopted for destroying raw material cell walls to make effective components in cells separate out, energy consumption is low, and meanwhile, no damage is caused for the structures of the effective components, so that prepared lotus leaf compoundcomposition ultra-micro powder can play the curative role quickly.

The invention provides a novel neural stem cell culture additive. The novel neural stem cell culture additive comprises the following components in final use concentration: 1mg / ml of bovine serum albumin, 50ng / ml of biotin, 1mg / ml of L-carnitine, 0.5mcg / ml of ethanol amine, 7.5mcg / ml of D(+)-galactose, 0.1 micromole of glutathione and 30nmol of sodium selenite. The novel neural stem cell culture additive is based on a scientific design, is simple in formula, low in cost, economic and reasonable, the multiplication of neural stem cells can be promoted, and therefore, the differentiation from the neural stem cells to gliocyte is reduced; the novel neural stem cell culture additive can be applied to aspects of culture of neural stem cell, particularly of the culture of neural stem cells and neural precursor cells of all mammals including human beings and is extremely wide in use range.

The invention discloses a technological method for rapid high-humidity drying and sterilization. The technological method for rapid high-humidity drying and sterilization includes the following steps that S1, materials are placed, specifically, the materials are evenly placed on trays of the uniform specification, a drying chamber is opened, the trays are put in the drying chamber, the interval between every two adjacent trays is 20-30 cm, and then the drying chamber is closed; S2, humidification and heating are carried out, specifically, a humidification device and a heating device are installed in the drying chamber and started at the same time, the relative humidity in the drying chamber is kept to be 40-60%, and the temperature inside the drying chamber is kept to be 100-105 DEG C and kept for 2-4 h; S3, high-temperature drying is carried out, specifically, humidification of the materials is stopped, the temperature in the drying chamber is raised to 110-120 DEG C through the heating deice and kept for 1-2 h, then raised to 130-140 DEG C and kept for 30-50 min, and afterwards lowered to 100-120 DEG C and kept for 40-50 min, and dried materials A are obtained. The technological method for rapid high-humidity drying and sterilization is simple, is high in drying speed, guarantees that the properties of the materials are not changed, is used for sterilizing the materials and greatly improves the quality of the materials.

The invention discloses an efficient coal desulfurization method by flotation and biological coupling. The method comprises the following steps: firstly pulverizing coal with a pulverizer to a grain size below 150 meshes, then carrying out removal of inorganic sulfur from coal by a flotation technology, and then carrying out removal of organic sulfur from the float coal by pseudomonas stutzeri LH-42; and flushing, filtering and drying the coal subjected to desulfurization treatment. The float coal after desulfurization by flotation and biological coupling has a total sulfur removal rate up to 67.83%. The method disclosed by the invention integrates the advantages of simple operation, high efficiency and rapidness of flotation desulfurization, integrates the advantages of mild conditions and low cost of biological desulfurization, and effectively protects the coal characteristics, such as combustion heat and coking property. The method disclosed by the invention can significantly improve the desulfurization efficiency of coal, brings higher comprehensive utilization values of the coal, and is a desulfurization technology with very promising market prospects.

The invention provides a spiral material conveyor used for agricultural product primary processing. The conveyor comprises a sleeve, a wind cylinder, a hopper and a wind cover, the wind cylinder and the hopper are both welded to the top of the sleeve, the wind cylinder is mounted on one side of the hopper, the wind cover is mounted on the outer side of the sleeve in a sleeving manner, an air opening is welded to the top of the air cover, one end of the sleeve is provided with a first motor through a bolt, the top of the first motor is provided with an intelligent controller through a bolt, andthe bottom of the sleeve is provided with a rotating speed sensor through a bolt. Through the spiral material conveyor used for agricultural product primary processing, powder raw materials can be prevented from being extruded into blocks, the loose degree of the powder raw materials can be ensured, the subsequent machining is facilitated, the material can be cleaned, the subsequent cleaning stepand the input of cleaning equipment can be reduced, the phenomenon that due to equipment damage, a large amount of raw materials are left in the sleeve can be avoided, it is ensured that a spiral plate can be smoothly started, and the conveyor is suitable for material conveying use during agricultural product primary processing.

The invention discloses a Chinese date compound composition prepared by adopting a combined method of graded ultrafiltration and superfine pulverization, and belongs to the field of traditional Chinese medicine and food industries. The Chinese date compound composition is mainly prepared from, by weight, 10-14 parts of Chinese dates, 4-8 parts of medlar, 0.5-1.5 parts of ginger and 0.5-1.5 parts of longan pulp. The Chinese date compound composition for tonifying qi and blood and increasing epidemic power adopts Chinese medicinal materials with homology of medicine and food as raw materials, has the effects of tonifying blood and qi, warming middle warmer and dispelling cold, and regulating immunity, and can be prepared into beverage series without any toxic or side effects. The preparationmethod comprises the following steps of: adopting the combined technology of graded ultrafiltration and superfine pulverization to prepare the jujube composite composition, adopting the graded ultrafiltration and superfine pulverization to destroy the cell walls of the raw materials so as to separate out the effective components in the cells, meanwhile, the structure of the effective components cannot be damaged, so that the prepared Chinese date compound composition can quickly exert the curative effect.

The invention relates to a rapid purification method of high-purity primary tumor cells. The method comprises the following steps of oscillating and digesting tumor tissues to prepare a mixed cell suspension; slowly adding the mixed cell suspension to the upper layer of fetal calf serum along the wall of a centrifuge tube; after addition, putting the mixture in an incubator for still standing; andperforming time difference digestion on adherent cells to obtain the high-purity primary tumor cells. According to the rapid purification method of the high-purity primary tumor cells provided by theinvention, an oscillator is used for digesting tissue masses, so that the tissue masses can be accelerated to be dispersed into the single cell suspension, the damage of mixed digestive enzymes to cell membranes is reduced, the survival rate of inoculated cells is improved, and the characteristics of primary cell membranes can be protected; and the purification of the primary tumor cells is realized by fetal calf blood serum still standing precipitation and time difference pancreatin digestion, the tumor cells and other non-tumor cells can be separated to the maximum degree, the purificationefficiency is high, and the purification time is saved. The method is simple and practical, and provides important technical support for application to individualized treatment of clinical patients.

The invention discloses an expansion type oil removal method for a steel plate with multiple pores in the surface, and belongs to the technical field of engineering machinery. According to the expansion type oil removal method, the adhesion force of oil stains on the surface of the steel plate can be forced to be reduced by adopting a heating mode, then the oil stains are promoted to be removed byadopting a steel brush as an auxiliary, the removed oil stains are adsorbed by utilizing a felt, and the treatment effect can be obviously improved; for the oil stains in the pores in the surface ofthe steel plate, an expansion oil absorption tentacle is innovatively introduced and fully extends into the pores in an extrusion mode, and the oil absorption action is triggered by utilizing the characteristic of thermal expansion; on one hand, the pores are actively attached to realize complete coverage by utilizing elastic deformation; and on the other hand, leaked gas is guided after expansion, and the leaked gas enters the pores in a similar atomization mode after being mixed with an oil removal agent, so that the oil stains in the pores are promoted to be efficiently and fully stripped and fall off and are adsorbed by the expansion oil absorption tentacle, the oil removal effect is very remarkable, and the environment is not prone to being polluted while the treatment cost is controlled.

The invention discloses a self-adaptive anisotropic divided frequency partition filtering method based on energy frequency band distribution. The self-adaptive anisotropic divided frequency partitionfiltering method comprises the following steps: (1) inputting two-dimensional post-stack seismic data u; (2) performing frequency domain decomposition on the two-dimensional post-stack seismic data byutilizing VMD to obtain IMF profiles uk (k is equal to 1, 2 to n) within different frequency ranges, wherein n is an integer; (3) respectively performing multiple iterative processing on each of thedecomposed IMF profiles uk (k is equal to 1, 2 to n) through a self-adaptive threshold anisotropic filtering algorithm and obtaining final refactoring results after each iterative processing and respectively calculating signal-to-noise ratio SNR and similarity SSIM; (5) selecting the optimal final result corresponding to the SNR and the SSIM for output. The self-adaptive anisotropic divided frequency partition filtering method disclosed by the invention has the benefits that de-noising is carried out in combination with the characteristics of a signal in a frequency domain and a time domain, local features and main structure information of seismic data textures are better protected while the noise is filtered, moreover, the seismic data quality is improved.

The invention discloses a high-strength borosilicate glass tube-made injection bottle and a production process thereof. The injection bottle comprises a protective shell; a first limiting ring is fixedly arranged at the top end of the outer wall of the protective shell, a heat preservation inner container is arranged on the inner wall of the protective shell in a sleeving mode, a positioning ring is fixedly arranged at one end of the outer wall of the heat preservation inner container, and the bottom end of the positioning ring makes contact with the top end of the first limiting ring; first sliding strips are arranged at the four corners of the top of the outer wall of the heat preservation inner container correspondingly, first sliding grooves are formed in the four first sliding strips correspondingly in a sliding mode, and the four first sliding grooves are formed in the four side edges of the inner wall of a protection cap correspondingly. By clamping the heat preservation inner container on the top of the protective shell, the high-strength borosilicate glass tube-made injection bottle achieves the sealing effect; due to layered heat insulation, a heat preservation and protection effect is achieved on a small amount of medicine not prone to sudden change at the special temperature, the characteristics of the medicine are protected, and the practicability of the high-strength borosilicate glass tube-made injection bottle is improved.

The invention discloses a full-closed metallurgy rotary kiln and belongs to metallurgy ichor. The full-closed metallurgy rotary kiln comprises a kiln head, a kiln cylinder and a kiln tail of the rotary kiln and further comprises a kiln head box, wherein the sides, opposite to the kiln head and the kiln tail, of the kiln head box are connected with the ends of the kiln cylinder. The kiln head box and the kiln cylinder are rotataby connected, and a cleaning sealing bin is arranged at the kiln head and the kiln tail; a material outlet and inlet are formed in the cleaning sealing bin, and the outlet and the inlet are each provided with a plug board sealing valve; the cleaning sealing bin is further provided with an air inlet and an air outlet, and during feeding and discharging, the first plugboard sealing valve and the second plug board sealing valve which are arranged at the outlet and the inlet of the cleaning sealing bin are opened and closed alternately, so that the interior of the kiln cylinder is isolated from the outside; full sealing of the metallurgy rotary kiln can be achieved from the links such as material in and out, circumferential sealing and end face dynamic sealing,strict isolation is achieved between the kiln interior atmosphere and the atmosphere, and the purpose that metallurgy materials are protected through the production atmosphere is achieved.

Disclosed is a construction and protection method for an extremely soft rock foundation. Before the extremely soft rock foundation is excavated to the foundation surface, a protective layer with the thickness of 0.3-0.5 m is reserved, and then the protective layer is excavated to the foundation surface in a mechanical or manual prying digging mode; the foundation surface is cleaned; a cement mortar protective surface with the thickness of 3-10 cm is sprayed to a slope wire mesh, and a fat concrete cushion layer with the thickness of 15-25 cm is poured to the bottom of the foundation to protect the foundation surface. The method succeeds in the Guangxi Youjiang river Naji navigation project, the Guangxi Youjiang river Yuliang navigation project and the Yujiang River Laokou navigation project successively, and it shows that the method is worth popularization in the construction of the extremely soft rock foundation.

The invention discloses a complex electric catalyst and a preparation method thereof. The catalyst consists of sepiolite and graphene modified tin dioxide supported on the sepiolite. The preparation method comprises the following steps of: preprocessing the sepiolite to obtain sepiolite powder; preparing a graphene-stannic chloride sol; and mixing the sepiolite powder and the graphene-stannic chloride sol, uniformly stirring by using a constant temperature magnetic heating stirrer, standing for ageing, performing centrifugal separation, drying, baking, grinding and sieving to obtain the complex electric catalyst. The preparation method is simple, low in manufacturing cost and easy to promote and apply; good characteristics of graphene are protected to the greatest extent, and the catalytic efficiency of the electric catalyst is improved maximally; and the prepared complex electric catalyst has stable properties and high electric catalytic efficiency and can be reused.

The invention discloses a lily bulb compound composition prepared by a method combining staged ultrafiltration and superfine grinding, belonging to the fields of traditional Chinese medicine and foodindustry. The lily bulb compound composition is mainly prepared from the following raw materials in parts by weight: 12-18 parts of lily bulb, 4-8 parts of radix polygonati officinalis, 3-6 parts of semen armeniacae amarae and 3-6 parts of Hangzhou white chrysanthemum flowers. The lily bulb compound composition is prepared by selecting the traditional Chinese medicines with homology of medicine and food as raw materials, has functions of nourishing Yin and moistening the lung, lowering Qi and relieving asthma as well as easing mental anxiety and calming nerves, and is free from any toxic and side effects. The preparation method provided by the invention adopts the method combining staged ultrafiltration and superfine grinding to prepare the lily bulb compound composition; the method uses staged ultrafiltration and superfine grinding to destroy the cell walls of the raw materials so as to enable effective components in the cells to be separated out; furthermore, the method does not destroy the structures of the effective components, so that the prepared lily bulb compound composition can quickly exert therapeutic effect.

The invention discloses a boiler filtering deionized water processing system. The boiler filtering deionized water processing system comprises a multi-media filter, a heat exchanger, a precision filter, a high pressure pump, and a reverse osmosis system, and also comprises a chemical dosing system arranged between the heat exchanger and the precision filter; the chemical dosing system comprises a scale inhibitor adding system and a NaHSO4 adding system. According to the multi-media filter, filter layers composed of quartz sand and active carbon at a certain ratio are used for removing impurities such as suspensions, sludge, and colloids in tap water completely; the chemical dosing system is used for adding sodium hydrogen sulfite into water so as to avoid oxidation damage of reverse osmosis membrane; a scale inhibitor is added into water so as to avoid crystallization separation of salts in concentrated water in the reverse osmosis system and protect characteristics of the reverse osmosis membrane; and the reverse osmosis system can be used for removing 99.9% of organic matters and bacteria, and 98% of salts in water, improving water quality greatly, and ensuring long-term operation of boilers without generation of scale.

The invention discloses an electric operating device for marine hydraulic steering gear, which relates to the technical field of shipbuilding; it includes a hand wheel and a rotating shaft, one end of the rotating shaft is connected with the hand wheel, the other end is connected with the shaft of a universal transfer switch, the first rotating shaft seat is connected with the second One side of the rotating shaft seat is connected, and the other side of the second rotating shaft seat is connected with the universal switch. An elliptical cam is set on the rotating shaft passing through the second rotating shaft seat, and the elliptical cam is in contact with the top wheel. In the wheel seat, springs are arranged on both sides of the top wheel, and a limit ring is set between one side of the elliptical cam and the second shaft seat; the limit ring is fixedly connected with the shaft, and the limit ring limits the rotation angle of the handwheel to ±44° °. The present invention can solve the problems that the electric operating device of the marine hydraulic steering gear is prone to failure, has poor reliability, and cannot automatically reset when the hand is released when the handwheel is turned.

The invention discloses a compound composition of short-stem Acanthopanax senticosus prepared by adopting a combined method of grading ultrafiltration and ultrafine pulverization, belonging to the fields of traditional Chinese medicine and food industry. A Acanthopanax senticosus compound composition is prepare from that following raw material in parts by weight: Acanthopanax senticosus 10-20 parts, orange peel 7-8 part, mulberry 4-8 portion of fructus Alpiniae Oxyphyllae 1-2 copies. A Chinese medicinal composition for nourish liver and kidney, regulate qi, invigorating spleen, warming kidney,consolidating essence, and relieve fatigue is prepared from Chinese medicinal materials including kidney qi, kidney yang, and kidney yin through invigorating liver and kidney, regulating qi, invigorating spleen, warming kidney, consolidating essence, and relieving fatigue, and features safety, effectiveness, non-toxicity, and no side effect. The preparation method of the invention, step-by-step ultrafiltration, A Chinese medicinal composition comprise radix Acanthopanacis Senticosi and radix Acanthopanacis Senticosi is prepared by ultrafine grin combined with ultrafiltration, ultrafine grinding and destroying cell wall of raw material to obtain effective composition, without destroying that structure of active ingredient, so that the prepared ultrafine powder of radix Acanthopanacis Senticosi can quickly exert curative effect, and has remarkable kidney tonifying and fatigue resisting effects.