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1155results about How to "Slow down the flow" patented technology

Low-temperature fast curing underfill adhesive and preparation method thereof

The invention discloses a low-temperature fast curing underfill adhesive, which is characterized by comprising the following raw materials by weight portion: 40 to 65 portions of resin, 0.5 portion of colorant, 20 to 25 portions of curing agent, 1 to 6 portions of accelerant, 0.1 to 3 portions of coupler and 15 to 25 portions of epoxy active diluents. The preparation method comprises the following steps: firstly, uniformly mixing the resin and color paste for 20 to 40 minutes at 20 to 30 DEG C; secondly, adding the curing agent and the accelerant by three times, uniformly mixing the materials with a three-roller at 20 to 30 DEG C under a condition of chilling drying with cooling water kept at 15 DEG C for 3 times, adding the uniformly mixed materials into a reaction kettle and completely vacuumizing the reaction kettle for 15 minutes; and finally, after the resin and the curing agent are mixed uniformly, adding the coupler and the epoxy active diluents, mixing the materials in the reaction kettle, and completely vacuumizing for 30 minutes to obtain the product. The product is low in curing temperature, high in curing speed and good in storage stability, simple, easy and environmentally-friendly in preparation process, low in cost and wide in application range.
Owner:YANTAI DARBOND TECH

Force measuring method of ventilation model under condition of free jet wind tunnel test

The invention provides a force measuring method of a ventilation model under the condition of a free jet wind tunnel test. The force measuring method of the ventilation model under the condition of the free jet wind tunnel test comprises the following steps that a ventilation model force measuring device is designed, specifically, the ventilation model, a measurement balance, a base, a tail support rod and a hot air flow blocking assembly are included, wherein the measurement balance is arranged in the ventilation model and used for measuring the aerodynamic performance of the ventilation model; the tail support rod realizes the supporting of the ventilation model in a tail support mode, one end of the tail support rod is arranged on the base, the other end of the tail support rod is connected with the measurement balance, and the tail support rod is not in contact with the inner wall of the ventilation model; the hot air flow blocking assembly is arranged between the tail support rodand the inner wall of the ventilation model, so that the tail support rod and the inner wall of the ventilation model are not in contact, and the hot air flow blocking assembly is used for reducing the flow velocity of hot air flow entering the tail of the ventilation model in the ventilation model; the ventilation model force measuring device is placed in a free jet wind tunnel; and the wind tunnel test is carried out to obtain effective force measuring data. According to the force measuring method of the ventilation model under the condition of the free jet wind tunnel test, the technical problems such as the inaccuracy of the model force measuring due to the inability to completely simulate the real flight environment of an aircraft in a conventional wind tunnel in the prior art can besolved.
Owner:BEIJING AEROSPACE TECH INST

Rolling type electric adsorption filter element

The invention relates to a roll typed electric adsorption filter core. The invention has the structure that a roll typed electric adsorption component part is arranged inside a casing, and a liquid inlet, a liquid outlet and an electrode are arranged in the casing. A composite layer, which is composed of a conductive layer, a adsorption layer, a supporting layer, a adsorption layer, a conductive layer, a adsorption layer, a supporting layer and a adsorption layer (totally eight layers), winds on the core shaft, and the fixing layer on the lateral side tightens the composite layer to make the composite layer fixed on the core shaft. When original liquid enters into the filter core through the liquid inlet, and while passing the supporting layer of the roll typed electric adsorption component parts, the charged particles (like metal ions: calcium, magnesium, sodium, lead, mercury, cadmium and so on, and acid radical, etc) are absorbed in the electric double layer on the surface of adsorption layer under the effect of direct current electric field force, and then are effectively removed, and so the liquid is purified. The fluid flow of the roll typed electric adsorption filter core distributes evenly and has strong adaptability to original liquid. The invention has good purification effect, low operation energy consumption, simple structure, low manufacture cost and long useful life, and can purify water, wine, beverage and other liquids.
Owner:黄樟焱

Activated carbon/coke-based coke oven flue gas desulfurization and denitration system and activated carbon/coke-based coke oven flue gas desulfurization and denitration method

The invention discloses an activated carbon/coke-based coke oven flue gas desulfurization and denitration system and an activated carbon/coke-based coke oven flue gas desulfurization and denitration method. The flue gas desulfurization and denitration system comprises an activated carbon/coke flue gas purification tower, an activated carbon/coke regeneration tower, a chimney, an ammonia water injection system and an absorption tower, wherein an activated carbon/coke conveyor is arranged between the purification tower and the regeneration tower; the regeneration tower is connected with a high temperature heating system and a regenerated gas pipeline; the ammonia water injection system comprises an ammonia water container; the ammonia water container is connected with a first ammonia water pipeline and a second ammonia water pipeline which are arranged in parallel; the first ammonia water pipeline and the second ammonia water pipeline are respectively communicated with the interiors of aflue gas inlet pipeline and the absorption tower; the bottom of the absorption tower is connected with an ammonium sulfate solution pipeline, and the top of the absorption tower is connected with a waste gas exhaust pipeline; the regenerated gas pipeline is communicated with the interior of the absorption tower; a purified gas exhaust pipeline and the waste gas exhaust pipeline are communicated with the chimney; the activated carbon/coke conveyor comprises an old material conveyor used for conveying activated carbon/coke at the bottom of the purification tower onto the top of the regenerationtower, and a new material conveyor used for conveying activated carbon/coke at the bottom of the regeneration tower onto the top of the purification tower.
Owner:南京泽众环保科技有限公司

Novel cathode structured aluminum cell with longitudinal and transversal wave damping functions

The invention relates to a novel cathode structure aluminum electrolysis bath with longitudinal and transverse wave decreasing functions, which comprises an electrolysis bath shell, an electrolysis bath lining, a fire-resisting material, a cathode carbon block, a lining carbon brick, carbon tamping paste, fire-resisting concrete, and a cathode carbon bar. The cathode structure aluminum electrolysis bath is characterized in that the top surface of the cathode carbon block is provided with more than one raised structures each of which is connected with the cathode carbon block integrally, and the arranging mode of each raised structure is to be parallel to the axial direction of the cathode carbon block, vertical to the axial direction of the cathode block, or adopt a mixed mode of the two. The novel cathode structure aluminum electrolysis bath with the longitudinal and the transverse wave decreasing functions can slow down the flow speed of cathode aluminum fluid in the transverse direction and the longitudinal direction in the electrolysis bath and reduce the fluctuation height of the aluminum fluid surface in the transverse direction and the longitudinal direction, improve the stability of the aluminum fluid surface of aluminum, reduce the solution loss of the aluminum, reduce the electric energy consumption for aluminum electrolysis production, and prolong the service life of the novel cathode structure electrolysis bath.
Owner:SHENYANG BEIYE METALLURGIGAL TECH CO LTD

Expanded polymer grouting material for high pressure and large flow karst water inrush treatment and preparation method

Belonging to the technical field of underground engineering plugging materials, the invention relates to a preparation method of an expanded polymer grouting material for high pressure and large flowkarst water inrush treatment. The method includes: 1) adding a crosslinking agent into acrylic acid, and then adding a macromolecular water-absorbent resin comonomer for polymerization reaction to obtain a precursor; 2) adding an initiator into the precursor obtained in step 1), raising the temperature and carrying out reaction to obtain hydrogel, and mincing the hydrogel to obtain primary macromolecular water-absorbent resin; 3) sprinkling a surface cross-linking agent to the surface of the primary macromolecular water-absorbent resin obtained in step 2), and then drying the product; and 4) preparing an inorganic water conducting agent into a suspension liquid, sprinkling the suspension liquid to the product obtained in step 3), and performing drying to obtain the expanded polymer grouting material. The polymer grouting material provided by the invention effectively solves the technical problem of difficult retention of grouting materials under a water inrush condition, and has the characteristics of green and no pollution, adjustable expansion time, and an expansion ratio up to 304 times.
Owner:SHANDONG UNIV

Foam water-drainage agent and its aqueous solution

The invention discloses a foam water-drainage agent and its aqueous solution, and belongs to the technical field of the oilfield chemical engineering. The foam water-drainage agent is composed of 50-80 parts by weight of a Sapindus mukurossi Gaertn extract, 20-40 parts of fatty alcohol polyoxyethylene ether AEO18, 1-5 parts by weight of polyacrylamide and 5-10 parts by weight of triethanolamine. The foam water-drainage agent has the characteristics of strong foaming capability after meeting water, good foam stability, and high liquid carrying capability and high mineralization resistance of foams, and is suitable for the use in natural gas wells containing gas condensate and having a high mineralization and a large water output; the foam water-drainage agent has a foam stability of 170mm, has a foam water content of not more than 2.0%, has a mineralization resistance of 250g/L, has a gas condensate resistance of 30%, has a temperature resistance of 90DEG C, is non-toxic, is easy to degrade, and does not pollute the environment; and the foam water-drainage agent has the advantages of compatibility with chemicals comprising methanol, a corrosion inhibitor, a scale inhibitor and the like, no chemical reaction with gas or liquid components, no increase to the toxicities of gases or combustion products, and no corrosion to equipment or pipelines.
Owner:CHINA PETROLEUM & CHEM CORP +1

Drainage channel overflow weir for reducing agricultural non-point source pollution

The invention discloses a drainage channel overflow weir for reducing the agricultural non-point source pollution. The overflow weir consists of a sandstone filtering layer, a combined sewage ecological purification device and a permeable concrete weir. The combined sewage ecological purification device is arranged between the sandstone filtering layer and the permeable concrete weir. The combined sewage ecological purification device consists of a biological filter bed and a fixing algae reaction tank. The sandstone filtering layer is arranged at the head end of a water facing surface of the overflow weir. The overflow weir is arranged in an overflow cross section of a drainage channel. The height of the overflow weir is equal to the daily water level elevation of the drainage channel. The drainage channel overflow weir is scientific and simple, is easy to implement. The overflow weir is arranged in the drainage channel, so that the drainage channel overflow weir has the effects of stopping flowing water, slowing down the flow rate, precipitating suspended matter in the water, removing substances such as nitrogen, phosphorus and the like in agricultural drained water and increasing the dissolved oxygen concentration of a water body. A purifying material has low cost and is easy to obtain. A purification facility is convenient to maintain and manage. The purifying effect on the polluted water is ensured to a certain extent, so that the agricultural non-point source pollution can be well reduced, and the water quality of the rivers and the lakes in the rural areas is improved.
Owner:YANGZHOU UNIV

Wind speed-reducing water mist removing device

The invention relates to a wind speed-reducing water mist removing device which comprises a toggle joint and a purifying cylinder, wherein the toggle joint is connected with an air inlet pipeline, and the purifying cylinder is connected with an air outlet of the toggle joint; the purifying cylinder comprises an outer cylinder body with an air outlet, a middle cylinder body and an inner cylinder body, wherein the outer cylinder body is installed above the air outlet of the toggle joint and the middle cylinder body and the inner cylinder body are installed in the outer cylinder; multiple layers of damping disks are arranged in both an annular passage between the outer cylinder body and the middle cylinder body and an annular passage between the middle cylinder body and the inner cylinder body; multiple layers of damping disks are formed by mutually spacing at least two small damping disks and at least two big damping disks; and a drain pipe is installed at the bottom of the outer cylinder body. The invention is used for the purification processing of industrial waste gases, and the water mist and the waste gases after being mixed are rapidly discharged into the toggle joint by the air inlet pipeline through an induced draft fan; after carrying out centrifugal shunting, the water mist mixed with smoke and poisonous substances is condensed in the purifying cylinder and separated from an airflow, thus purified air is discharged; and the invention has the advantages of low cost and obvious purifying effect.
Owner:张宏生

Micro-aeration enhanced ecological floating bed sewage treatment device

The invention discloses a micro-aeration enhanced ecological floating bed sewage treatment device which comprises water plants, a floating carrier, a combined packing layer, a fine bubble aeration pipeline, a support and an aeration machine, wherein plant holes are formed in the floating carrier, the water plants are planted onto the floating carrier through the planting holes and float on the water surface inside the micro-aeration enhanced ecological floating bed sewage treatment device, the combined packing layer is arranged below the floating carrier, the fine bubble aeration pipeline is circularly laid at the bottom of the micro-aeration enhanced ecological floating bed sewage treatment device through the support, and the aeration machine is connected with the fine bubble aeration pipeline at the bottom of the device. Aeration for the device is performed through a micro-aeration system, so that the growth of microbes on plant roots and the combined packing layer is promoted, the synergistic effect of a microbial system and a water plant system is promoted, the device can be used repeatedly, pollution to water cannot be caused, the cost is low, and the device is very suitable for being applied in a large area during natural water body pollution treatment.
Owner:SOUTHWEST JIAOTONG UNIV

Field portable hydraulic and wind supplementary power generation device

The invention discloses a field portable hydraulic and wind supplementary power generation device which comprises a water turbine used for hydraulic power generation, a vertical shaft wind turbine and a power generation device, wherein the vertical shaft wind turbine and the power generation device are used for wind power generation. The water turbine and the vertical shaft wind turbine are not used at the same time. The water turbine comprises a water inlet channel, a water outlet channel, a water turbine rotary shaft, a rotary wheel chamber and a rotary wheel, wherein the rotary wheel is composed of a water guide cone, a hub and water turbine blades, and the water turbine blades are arranged on the hub. The vertical shaft wind turbine is composed of a wind turbine rotary shaft and an impeller, wherein the impeller comprises multiple wind turbine blades and two blade fixing frames. A rotor of a power generator body is connected with a water turbine rotary shaft, and the water turbine rotary shaft is connected with the wind turbine rotary shaft through a coupler. By means of the field portable hydraulic and wind supplementary power generation device, hydraulic power or wind power can be converted into electricity in real time on the spot, and the power generation device is easy to operate, small in size, low in weight, easy to carry, suitable for being used for field illumination, cooking and charging of mobile phones. Meanwhile, a storage battery can be externally connected for electricity storage and can be used as a standby power source during an accidental short-time power failure.
Owner:HOHAI UNIV

Synchronous powder spreading type metal laser 3D printing powder feeding device

A synchronous powder spreading type metal laser 3D printing powder feeding device comprises a powder storage bin (1), a powder feeding bin (2), a powder feeding belt (3), a powder spreading head (4), a driving transmission gear (5), a driven transmission gear (6), a driving motor (7), a cross beam (18), a cladding head (19) and a shell (11). The powder feeding bin is fixed to the cladding head through a rolling bearing and rotates freely. A transmission gear is installed on the upper portion of the powder feeding bin and meshes with the other transmission gear to form a transmission gear pair, and preset movement is achieved under driving of the motor. The powder storage bin stays still but keeps sliding relative to the powder feeding bin. Powder enters the powder feeding belt from a bottom outlet of the powder feeding bin, is fed to the powder spreading head under driving of a driving wheel and is evenly spread on a base plate under the action of gravity to form a powder layer. The powder spreading head and the shell are together fixed to the cladding head. The powder feeding bin and the cladding head move coordinately through procedure setting, the effect that the powder layer is always directly in front of a laser spot is ensured, and circulating water is adopted for cooling in the powder spreading head.
Owner:INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI

Self-propelled complex-finger type cotton picker

The invention relates to a self-propelled complex-finger type cotton picker, belonging to the technical field of agricultural machinery. The self-propelled complex-finger type cotton picker comprises a cotton boll picking platform, a wind power conveying device, a cotton boll separating device, an impurity removing device and a cotton boll collecting box; the cotton boll picking platform is provided with a cotton boll picking finger rod row and a seed cotton delivery outlet; the delivery inlet of the wind power conveying device is in butt joint with the seed cotton delivery outlet of the cotton boll picking platform and is connected with the inlet of the cotton boll separating device; the outlet of the cotton boll separating device is connected with the cotton boll collecting box through the impurity removing device; the cotton boll separating device comprises a separating box; a spike roller is arranged above the bottom of a hopper of the separating box; a direct-current channel is formed above the spike roller; the joint of the inlet of the cotton boll separating device and the hopper is provided with a cotton pressing brush; a grille plate which extends to the outlet of the cotton boll separating device is arranged below the spike roller; and the bottom of the hopper is provided with the cotton boll collecting box through a wind closing device. The self-propelled complex-finger type cotton picker effectively overcomes the defects of non-thorough cotton boll separating and easy blocking, prevents the cotton boll from entering the impurity removing device to cause cotton dying and damping, reduces the impurity rate of the picked cotton and is beneficial to improving the grade of the cotton.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI

Polysaccharide composite film for arresting bleeding and preparation method thereof

InactiveCN102580138AComplete and effective hemostasisThe exact mechanism of hemostasisAbsorbent padsBandagesComposite filmLiquid state
The invention discloses a polysaccharide composite film for arresting bleeding, which comprises a starch film and a chitosan film, wherein the starch film and the chitosan film form mutually bonded structures through drying after the starch film in a liquid state permeates through the chitosan film in a solid state; and the mass ratio of the starch film and the chitosan film is 0.1-1 to 50-1. The invention further discloses a preparation method of the polysaccharide composite film for arresting bleeding. The preparation method comprises the following steps: preparing chitosan solution; preparing starch solution; placing the chitosan solution into a die for solidification and formation so as to obtain a chitosan film; and adding starch solution on the chitosan film and forming through solidification, so as to obtain the polysaccharide composite film for arresting bleeding. In the invention, when the composite film is used for arresting bleeding, various mechanisms for arresting bleeding can be started at the same time, so as to enable bleeding arresting to be more efficient and safe; besides, the composite film material of the invention can be degradable and absorbable, and also can play effective wound protecting and anti-adhesion effects at the same.
Owner:张晓金

Self-cleaning pipeline filtering device for water conservancy project

ActiveCN111214876ANo need for manual disassembly and cleaningNo manual operationStationary filtering element filtersWater flowWater resources
The invention discloses a self-cleaning pipeline filtering device for a water conservancy project. The filtering device comprises a filter pipe, the filter pipe comprises a water inlet and a sewage port, a residue discharging pipe is mounted on the side wall of the filter pipe, a pressure valve is mounted on the residue discharging pipe, a filter screen and a fixing ring are mounted on the inner wall of the filter pipe, the filter screen and the fixing ring are both located between the two connecting positions of the residue discharging pipe and the filter pipe, a spring is mounted at the end,close to the filter screen, of the fixing ring, a piston is mounted at the end, close to the filter screen, of the spring, and a clear water pipe is mounted on the side wall of the filter pipe. The pressure of the residue discharging pipe is higher than that of the filter pipe after the filter screen is blocked, so that water flows along the residue discharging pipe to form negative pressure to peel off impurities on the filter screen; the clean water pipe is blocked through the piston to prevent sewage from entering, the clear water pipe and a blow-off pipe are arranged side by side, the clear water pipe can be closed to open the blow-off pipe to achieve self-cleaning when the filter screen is blocked, the self-cleaning speed is further increased through a pricking needle, and water resources are saved.
Owner:郭新生

Blade root pouring method for bolt sleeve embedded blade

ActiveCN107199715AEasy to useIncrease seepageDomestic articlesGlass fiberEngineering
The invention discloses a blade root pouring method for a bolt sleeve embedded blade. The method comprises the die cavity preparing step; and lower glass fiber laying, continuous felt laying, embeddedpart laying, upper glass fiber laying, flow guide net laying, glue injecting pipe laying, air exhaust bag laying and glue pouring are carried out. A continuous felt is placed on the lower face of thebottom of an embedded part, a first flow guide net and a glue injecting pipe are laid on the embedded part and the upper glass fiber cloth, and the distance between the starting point of the first flow guide net and the starting point of the embedded part ranges from 0 mm to 300 mm; the first flow guide net is divided into three segments including a rear edge flow guide net, a middle segment flowguide net and a front edge flow guide net in the circumference direction, and a resin deceleration belt with the width ranging from 30 mm to 150 mm is arranged among the rear edge flow guide net, themiddle segment flow guide net and the front edge flow guide net, and the glue injecting pipe is arranged in the length direction of the embedded part; and air exhaust bags are arranged at the position, above the first flow guide net, of the front edge and the rear edge of a blade root. According to the method, the problem that due to uneven resin flow speed, resin in the blade root area of an embedded blade is hollow is solved, and the blade root connecting strength can be further improved.
Owner:ZHUZHOU TIMES NEW MATERIALS TECH

Ground flattening device for construction site

The invention discloses a ground flattening device for a construction site. The ground flattening device for the construction site comprises a bottom plate, wherein the outer walls of two sides of thebottom plate are separately rotatably connected with moving wheels; a semi-arc groove is formed in the position, which is close to the middle, of the outer wall of the bottom of the bottom plate; theinner walls of the two sides of the semi-arc groove are separately rotatably connected with rotating rods; a grinding roll sleeves the outer wall of each rotating rod; a hydraulic rod is arranged atthe position, which is close to the middle, of the outer wall of the bottom of the bottom plate; a scraping knife is arranged on the outer wall of the bottom of the hydraulic rod; a fixing plate is arranged on one side of the outer wall of the top of the bottom plate; a rectangular opening is formed in the outer wall of one side of the fixing plate; and a cavity is formed in the fixing plate. Thecircumstance that pressing marks remain on the ground when a flattening plate is used for flattening the ground can be prevented, meanwhile, the force of friction between the flattening plate and theground can be reduced, the circumstance that concrete is dry and caked due to water loss of the concrete after the concrete is stored for a long time can be prevented, and the circumstances that the flowing speed of the concrete is over high, excessive concrete is discharged, and thus flattening of the device to the ground is affected can also be prevented.
Owner:宣城良知知识产权服务有限公司
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