66results about How to "Low shear" patented technology

The invention relates to a front diversing flow rotor structure with tapping splitter blades for an artificial heart blood pump, comprising a rotor hub passageway and rotor blades, wherein the rotor hub passageway adopts a gradual contraction structure; a streamline cubic spline curve is used to define the hub passageway; and the rotor blades are composed of two overall large blades and two small splitter blades; and the overall large blades adopt a two-section blade-type structure design at a root part and a tip part respectively. The circumferential position structure of the rotor blades is as follows: the small splitter blades are located at 47% of a circumferential angle between the two overall large blades. After adopting the rotor structure, the blood-supply and pressure rising capability of the rotor is strengthened, the tangential velocity of a rotor blade tip and the shearing action of the rotor blades on blood are reduced, and the internal flow of the rotor is smooth without flow separation.

The invention provides a high efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and a water treatment method thereof, relating to a biological filter tank and a water treatment method using the biological filter tank. The biological filter tank is composed of an upper filter material, a medium filter material, a lower filter material and a supporting layer, wherein the upper filter material is active carbon, anthracite or biological ceramsite, the medium filter material is modified zeolite, natural zeolite or synthetic zeolite and the lower filter material is a phosphorus functional material. The filter tank is characterized by fast start, a complex and stable biological phase, great biomass, high activity, strong impact resistance, a filter material expansion rate of 0% to 50%, small resistance at the head of the filter tank, high mass transfer efficiency of materials, oxygen and pollutants, a high utilization rate of filter layers and filter materials and small possibility of occurrence of hardening of the filtering materials. The filter tank is applicable to treatment of raw water in which the concentration of water source phosphorus, ammonia nitrogen and organic pollutants fluctuates and can stably operate at a low temperature.

The invention discloses an underground reservoir artificial dam body and coal pillar dam body connecting structure and further discloses a construction technology of the underground reservoir artificial dam body and coal pillar dam body connecting structure. The underground reservoir artificial dam body and coal pillar dam body connecting structure comprises an artificial dam body and a coal pillar dam body. A dam body groove is formed in the coal pillar dam body and provided with a groove oblique surface, and an acute angle is formed between the extending directions of the groove oblique surface and the artificial dam body. Anchor rod drill holes are formed in the groove oblique surface, and the extending directions of the anchor rod drill holes are perpendicular to the extending direction of the groove oblique surface. An inverted-hook-type grouted anchor rod is fastened in each anchor rod drill hole, and a plurality of reinforcement framework beams are arranged in the artificial dambody. The two ends of each reinforcement framework beam are in fastening connection with the ends of the inverted-hook-type grouted anchor rods on the two sides of the reinforcement framework beam correspondingly. According to the underground reservoir artificial dam body and coal pillar dam body connecting structure and the construction technology thereof, the connecting strength and stability are improved, and the construction technology is further simplified.

The invention discloses a shell assembly and a foldable electronic device. The shell assembly includes: a first shell; a second shell, arranged side by side at an interval with the first shell; a bending part, arranged between the first shell and the second shell and being provided with a first side edge and a second side edge which are arranged back to back, the first side edge facing the first shell and being connected with the first shell, and the second side edge facing the second shell and being connected with the second shell; a first supporting sheet, the first shell being provided witha first mounting surface, and the first supporting sheet being opposite to the first mounting surface and being connected to the first shell in a sliding manner; a second shell, provided with a second mounting surface which is opposite to or opposite to the first mounting surface when the second shell is folded in the first shell, and the second supporting sheet being opposite to the second mounting surface and is connected to the second shell in a sliding manner. The first supporting piece and the second supporting piece slide towards the bent part at the same time or deviate from the bent part at the same time. The layering risk of the flexible screen can be reduced, and the service life of the flexible screen is prolonged.

The invention discloses a high-physical-property matte thermoplastic polyurethane elastomer and a preparation method thereof. The high-physical-property matte thermoplastic polyurethane elastomer is prepared from the following ingredients in percentage by mass: 80 to 95 percent of thermoplastic polyurethane elastomer, 2.5 to 19 percent of high impact polystyrene, 0.5 to 2 percent of matte surfaceregulating agents, 0.1 to 0.5 percent of modified silicone master batch, 0.1 to 0.5 percent of antioxidant and 0.1 to 0.5 percent of lubricating agent. Compared with the prior art, the high-physical-property matte thermoplastic polyurethane elastomer has the advantages that the matte surface effect is good; the cost is lower; the defects of material physical property reduction due to the use of inorganic matte surface agent and poor matte surface effect are avoided; the defect of higher cost due to the use of other organic macromolecular material matte surface agents is avoided; in addition, the processing process can be regulated according to practical requirements to obtain the ideal matte effect.

Provided herein is a continuous cell perfusion model system that provides useful pharmacokinetic and pharmacodynamic information on the application of new drugs or combinations of various agents in vitro to human cancer cell lines. Also provided are methods of using this system to individualize cancer treatment.

The invention relates to a manufacturing method of homogeneous polyphenylene terephthalamide fibers. The polyphenylene terephthalamide fibers with high homogeneity can be produced by thoroughly mixing PPTA resin with 98 to 100 percent of concentrated sulfuric acid in an anisotropic twin-screw extruder, putting the mixture of the PPTA resin and 98 to 100 percent of the concentrated sulfuric acid into a homotropic twin-screw extruder to be dissolved, and leading the mixture through a filter equipment, a continuous film deaeration device and rectangular spinneret holes to carry out dry-jet and wet spinning. By adopting the anisotropic twin-screw extruder to mix materials, the manufacturing method has the advantages of easy feeding, strong mixing effect and weak shearing effect; the continuous film deaeration device can realize uniform and fast deaeration of high viscous PPTA/H2SO4 liquid crystal slurry; the spinneret holes which are arranged in a rectangle shape can ensure a larger contact area between injection tows and solidification liquid, and more even mass transfer and heat transfer between fibers and solidification liquid, thus facilitating the spinning of polyphenylene terephthalamide fibers with high homogeneity.

The invention relates to a rotor type mixing component. The rotor type mixing component comprises a feeding section, a first mixing section, a conveying section, a second mixing section and a discharging section which are sequentially arranged in the feeding direction. The first mixing section and the second mixing section are each provided with a plurality of pairs of screw flights. The top of each pair of screw flights is provided with a groove. Accordingly, the rotor type mixing component can relieve the shearing effect borne by the tops of the screw flights, backflow of some mixed materials is facilitated, original flowing of a rotor boosting face is disturbed, and homogenization of the material components is facilitated.

The invention provides a spiral pipe type air atomizing nozzle. The nozzle adopts a three-time atomization scheme so as to solve the problem of insufficient fuel oil atomization at present. A nozzle body is generally in a contracted cone shape, and the joint of an inner cavity of the nozzle body and a mixing cavity is an internal flow channel throat. A spiral pipe is fixed in the inner cavity, inclined holes are distributed in the pipe wall, and small holes are formed in the tail portion. A fuel pipe is fixed to the upstream of a flow channel, and oil holes in an outlet oil cover of the fuel pipe conduct primary atomization on fuel. Gas enters from the head of the nozzle, part of the gas forms outer ring gas through an axial cyclone, and part of the gas enters the spiral pipe to form innerring gas. According to the spiral pipe type air atomizing nozzle, primary atomization is conducted on fuel through the oil cover, then outer ring rotational flow gas and inner ring gas sprayed out ofthe inclined holes of the spiral pipe are mutually sheared and impacted to conduct secondary atomization, third-time atomization is conducted under the strong shearing effect of outer ring mixed gasand the inner ring gas sprayed out of the small holes of the spiral pipe on the throat, the air atomization effect is effectively enhanced, and pollutant emission is reduced.

The invention relates to a fixing device for operation on the pedicle, and particularly relates to a pedicle screw. The pedicle screw comprises a screw body and a U-shaped screw base, wherein the upper end of the screw body is connected with the U-shaped screw base; the upper 1/3-1/2 part of the screw body is an unthreaded rod; the unthreaded rod is externally provided with a porous healing layer; and the lower part of the screw body is provided with threads. The pedicle screw provided by the invention has the advantages that the pedicle screw can be easily turned into the pedicle by consuming the least time and labor, causes little shearing action and damage on the pedicle, can be merged into the bone tightly without separation, can ensure that a patient recovers rapidly after operation, has a good treatment effect and is suitable for non-merged operation on the pedicle.

The invention relates to the field of dairy products, in particular to a method for producing fruit granule-containing dairy products. The method is suitable for the dairy products of which the viscosity is less than 40cp, and comprises the following steps: 1) checking and accepting; 2) preparing fruit granules; 3) adding mixed solution of the fruit granules into milk with a sinepump on line, and conveying the mixed feed liquid added with the fruit granules with a multi-cylinder plunger pump, wherein the upper limit of the rotation speed of the sinepump is 150r/min, and the aperture of the inlet and the outlet of the multi-cylinder plunger pump is 30 to 50mm; and 4) homogenizing, sterilizing and filling. Because the multi-cylinder plunger pump is adopted to convey the mixed feed liquid of the milk and the fruit granules, and the inlet and the outlet of the plunger pump are designed to have heavy caliber, the shearing action caused by equipment in a feed liquid conveying process is greatly decreased, the degree of damage to the fruit granules is reduced, the integrity of the granules is guaranteed and the product conveying continuity is also guaranteed by the multi-cylinder plunger pump.

The invention relates to a film forming method for a biological carrier in an internal circulation bioreactor. The film forming method comprises the following steps of: adding the needed biological carrier into the internal circulation bioreactor by 2 to 5 times; every time after a biological filler is added, introducing air to make the biological carrier in a fluidized state; adding domesticated inoculation active sludge into the bioreactor in a spraying way; after spraying, ventilating for 6 to 72 hours; discharging the sludge; and culturing in a continuous water feeding way. In the method, needed starting power is low, film forming time is short and a formed biological film has high impact load resistance.

The invention relates to a method for the dispersion of synthetic or natural nanoparticles and nanocomposite materials and to the use thereof in different sectors including those of ceramics, coatings, polymers, construction, paints, catalysis, pharmaceuticals and powdered materials in general.

The invention relates to a split-flow injection allocation method and a split-flow distributor. The method of the invention is characterized in that every subsection of a polymer injection pipe is provided with at least one distributor, and a split-flow barrier is arranged in the distributor to divide polymeric liquid entering into the distributor into two parts, one part of which flows up to an upper oil reservoir and the other part of which continues to flow down to the lower oil reservoir. The polymer injection pipe is provided with the split-flow distributor and the surface of the split-flow distributor is sleekly connected with the outlet of the distributor. So liquid passing by the distributor has little partial drop pressure loss, low friction resistance and little shearing action, thus effectively reducing the loss of the viscosity of injected polymer. The split-flow injection allocation method and the split-flow distributor can be widely used for improving the recovery ratio of reservoir oil displacement in an offshore oilfield.

The invention relates to a coaxial extruder and an extrusion method thereof. The coaxial extruder comprises a die, a rectifying disc, an extrusion device, a heater, a charging base and a power device, and is characterized in that the extrusion device comprises a main screw barrel, an outer screw and an inner screw; the two ends of the main screw barrel are connected with the charging base and the die correspondingly, and the outer screw is arranged in the main screw barrel and rotates; the inner screw is arranged in the outer screw and is in threaded connection with the rectifying disc; the inner screw and the outer screw are reverse in thread screwing direction, an additional thread is additionally arranged between main threads of the outer screw, the thread pitch of the additional thread is larger than that of the main threads, and an additional thread groove is formed by the additional thread and the main threads; and the bottom, at the position of the additional thread groove, of the outer screw is provided with a melt channel. The length-diameter ratio is greatly reduced, the strength of the outer screw is greatly improved, the number of heaters is reduced due to the shortened main screw barrel, and part of originally-emptied waste heat is sufficiently utilized; the material cost and the occupied area are saved, and the fusion raw material process time is shortened; the probability of decomposing of fusion materials due to overheating is reduced; and power consumption is reduced.

The invention specifically relates to a preparation process of cottonseed proteins, in particular to a process for producing high-purity cottonseed proteins through low-protein cottonseed meal. Cottonseed hulls and cotton velvet in conventional cottonseed meal can be completely separated, the removal rate of the cottonseed hulls reaches 98%, the removal rate of the cotton velvet reaches 96%, the ordinary cottonseed meal is converted into the cottonseed proteins, the content of the cottonseed proteins can reach 60% or above, and the cottonseed proteins can be applied to aquatic feed to replacefish meal. Part of the cottonseed proteins are taken away from generated products, namely the cottonseed hulls, in the screening process of a grading screen, thus the cottonseed hulls contain 10-14% of the cottonseed proteins, and the cottonseed hulls are rich in organic matter and nutrition, have quite high application value, are applied to the field of mushroom cultivation, and can also serve ashigh-protein feed for cattle and sheep. The preparation process can be suitable for industrial large-scale continuous production, the whole product production process is at the normal temperature, chemical extraction is not involved, the activity of original cottonseed proteins is not damaged, and the content of proteins in the conventional cottonseed meal (the content of the cottonseed proteinsis 40%-45%) is increased to 60% or above.

The invention discloses a modified acrylonitrile-styrene copolymer and a preparation method thereof. The preparation method comprises steps as follows: a blend is obtained by mixing an acrylonitrile-styrene copolymer, filler and a processing aid; the blend is added to an extruder via a main charging port, and glass fiber is added under traction of an auxiliary charging port of the extruder; the modified acrylonitrile-styrene copolymer is generated through mixing extrusion of the extruder at a preset main machine rotating speed and extruding processing temperature. A technology used in the whole preparation process is simple, and the prepared modified acrylonitrile-styrene copolymer has excellent use performance, tensile strength, impact resistance, bending strength and size stability and can meet the severe application environment requirements.

The invention relates to a melt mixing mechanism for a PVC thermal shrinkage film. The melt mixing mechanism comprises an extruder, a film blowing machine head, and a static mixer which is arranged between the extruder and the film blowing machine head, wherein one end of the static mixer is in combination connection with a screw head part of the extruder, and the other end of the static mixer is connected with a connecting section of the film blowing machine head through a flange; the static mixer is composed of a plurality of twisting elements which are connected in series and are in contact with each other; the plurality of twisting elements are fixedly arranged in a barrel of the extruder. According to the melt mixing mechanism for the PVC thermal shrinkage film, material flows in a gyring manner relative to spiral curves of the twisting elements; melts are overturned to realize radial mixing, so that the mixing and homogenizing effects of the melts are improved; the melts in the static mixer are mixed through own flowing energy, so that the shearing effect is low, and metal pigment powder is prevented from being further shorn and damaged.