61results about How to "Avoid floating phenomenon" patented technology

The invention relates to an improved integrated oxidation ditch, which comprises an oxidation ditch body, an aeration device at the bottom or the lower middle part and a built-in partition precipitation zone at the tail end of a treatment flow. The integrated oxidation ditch is characterized in that: a suspended filler is filled in the oxidation ditch body, a filler intercepting net is arranged at the water inlet of at least the precipitation zone, and a transverse herringbone folded plate or a bent pipe mud-water separation filler is arranged in the precipitation zone. The quantity of microbes in the oxidation ditch is increased, the treatment volume load is improved, the increased biomass is mainly centralized on the suspended filler, the actual suspended sludge concentration in the water of the oxidation ditch is not increased or reduced and can be controlled to be less than 3,000mg/l, the built-in partition precipitation zone can be designed according to the high load, the biomass is increased, the area of the precipitation zone is not increased or properly reduced, the occupation area of the oxidation ditch is actually and effectively saved, the occupation is saved by 1/3 to 1/5 compared with a common deep oxidation ditch and by 10 to 20 percent compared with a deep oxidation ditch with a precipitation zone, the suspended biological filler can save the running energy consumption and the running energy consumption can be reduced by 20 to 30 percent.

The invention relates to a bamboo charcoal viscose facial mask base cloth and a high moisture retention and moisturizing facial mask. The bamboo charcoal viscose facial mask base cloth is prepared with the following method: 1) adding nanometer bamboo charcoal powder and sodium alga acid into dispersion solution to be dispersed evenly in bamboo charcoal serous fluid; 2) adding the bamboo charcoal serous fluid into viscose spinning solution to be dispersed evenly, and filtering and deforming to obtain mixed spinning solution; 3) carrying out wet method spinning on the mixed spinning solution toobtain the bamboo charcoal viscose, and carrying out opening, mixing, carding and lapping to obtain a bamboo charcoal viscose felt; 4) dissolving chitosan in acetic acid aqueous solution, adding gelatin to be dissolved to obtain finishing liquor, and dipping the bamboo charcoal viscose felt into the finishing liquor to carry out impregnation modification to obtain a compound fiber felt; 5) carrying out spunlace reinforcement on the compound fiber felt. The bamboo charcoal viscose facial mask base cloth has high constraint ability on serum and good water retention and moisture liberation performance; after the facial mask serum is loaded through a liquid hanging step, the high moisture retention and moisturizing facial mask is obtained, situation that serum loss due to dripping and droppingcan be avoided, and waste is avoided.

The invention discloses a method for reinforcing a culvert through an inflatable internal mold and self-compacting concrete. The method comprises the following steps: firstly, positioning devices are mounted; secondly, the inflatable internal mold is mounted; thirdly, an annular cavity is blocked; fourthly, the self-compacting concrete is poured into the annular cavity to form a concrete strengthening layer; and fifthly, the inflatable internal mold is dismounted. A rubber air bag is adopted in the method for reinforcing the culvert for serving as the inflatable internal mold, the self-compacting concrete is poured into the position between the inflatable internal mold and an existing culvert, and the concrete strengthening layer formed by the self-compacting concrete which has certain bearing capacity and is uniform and dense serves as a reinforcing body of the existing culvert; the concrete strengthening layer and a culvert structure jointly bear load action and carry out cooperative work; and the bearing force of the existing structure is effectively improved.

The invention discloses a method for preparing chimeric antigen receptor T cells. The method comprises the steps of mixing a chimeric antigen receptor slow virus expression vector, pGP plasmids, pVSVG plasmids and polyetherimide firstly, and conducting uniform blow-beating to obtain a DNA/PEI compound; inoculating a culture dish with 293 cells, and then adding a complete medium for culture; adding the DNA/PEI compound to the culture dish dropwise; removing the medium after 4-10 h of culture; adding a conditioned medium, continuing culture for 8-32 h, and then collecting the medium; conducting centrifugal treatment to obtain medium supernatant containing slow viruses; adding a sucrose solution into a centrifugal tube, and then adding the medium supernatant containing the slow viruses along the wall of the centrifugal tube; conducting centrifugal treatment, removing centrifugation supernatant, and then adding a buffer solution; and then conducting T cell transfection to obtain the chimeric antigen receptor T cells through culture. Based on a slow virus packaging system, transfection efficiency can reach 60% or more.

The invention discloses a dairy product and a preparation process thereof. The dairy product includes the following raw materials: raw milk, vegetable oil and phospholipid. The ratio of raw milk to the vegetable oil to the phospholipid is rationally designed, especially the ratio of the vegetable oil to the phospholipid is designed, the phospholipid improves the surface tension of the contact surface between the vegetable oil and the low-fat milk and improves the mass transfer efficiency of the vegetable oil in the milk to achieve a dynamic and stable system, so that static aggregation and floating phenomena can be avoided; the phospholipid is used to disperse and emulsify the vegetable oil in the raw milk, so that the stability of the dairy product is facilitated; and at the same time, the preparation process adopts the mutual cooperation of process operation of pre-melting the vegetable oil step by step and a process of dissolving the raw milk step by step, and also improves the stability of the dairy product.

The invention provides a double-track traffic track transfer system. The system comprises a double-track beam and an automatic driving vehicle. The double-track beam is divided into an upper track anda lower track; the upper track is divided into a low-altitude section and a high-altitude section; the lower track is arranged at the turning section; each of the upper track and the lower track comprises two parallel running tracks; a vertical connecting piece is arranged between the two running tracks; a plurality of upright posts are vertically arranged on the side surface of each section; theautomatic driving vehicle comprises a vehicle body below the upper track. The upper surface of the vehicle body is fixedly provided with an upper walking wheel, a guide wheel, a track transfer walking wheel, a track transfer guide wheel and a telescopic mechanism in a connection way; lower walking wheels are fixedly connected to the lower surface of the vehicle body; when the vehicle passes through the turnout, orbital transfer is conducted, straight moving or steering is achieved in the mode that the upper walking wheels are separated from the low-altitude running tracks, and the track changing walking wheels or the lower walking wheels make contact with the tracks, the phenomenon that the track beams are interrupted and the vehicle walking wheels are suspended is avoided, vehicle bumping is prevented, and the advantages of being high in vehicle passing efficiency, good in stability and comfortable for passengers are achieved.

The invention relates to a volumetric flask fixing device. The volumetric flask fixing device comprises a support; a supporting base for supporting volumetric flasks and a top base for the necks of the volumetric flasks to penetrate through are arranged on the support, and the top base is spaced from the supporting base in the vertical direction; a pressing base for pressing the volumetric flasksis arranged at the position, between the top base and the supporting base, of the support, the pressing base and the supporting base can move relatively, openings for the necks of the volumetric flasks to penetrate through are formed in the pressing base, and the openings have rims applying downward pressure to the volumetric flasks. The pressing base can apply downward pressure to the volumetricflasks through a pressing structure; when the volumetric flasks are immersed into water for ultrasonic treatment, the pressing base makes the volumetric flasks immersed in the water all the time by overcoming buoyancy on the volumetric flasks, so that the floating phenomenon is avoided, and the ultrasonic treatment effect is guranateed.

The invention discloses a light aggregate concrete plate with a flat and smooth surface and a preparation method thereof, the light aggregate concrete plate comprises a plate main body and a magneticlight aggregate, the magnetic light aggregate is distributed at the bottom of the plate main body, and the top surface of the plate main body is flat and smooth, wherein the magnetic light aggregate is prepared by adsorbing nano ferroferric oxide in particles of initial light aggregate, and the lightweight aggregate concrete plate is prepared from the following raw materials in percentage by mass:30 to 50% of cement, 10 to 20% of quartz powder, 0.05 to 0.15% of a water reducing agent, 0.05 to 0.15% of a first adhesive, 20 to 40% of water and 10 to 25% of the magnetic lightweight aggregate. According to the lightweight aggregate concrete plate with the flat and smooth surface, the magnetic lightweight aggregate is distributed at the bottom of the plate main body through the vibration effect and the magnetic force effect of the magnetic vibration table, so that the phenomenon that the lightweight aggregate floats upwards can be avoided without reducing the water amount and increasing the initial use amount of the lightweight aggregate, and the top surface of the lightweight aggregate concrete plate with the flat and smooth surface is flat and smooth; and subsequent plate surface decoration treatment is facilitated.

The invention relates to a suspended turf transplanting machine. The suspended turf transplanting machine comprises a fixing frame, the fixing frame is provided with a turf transplanter, the turf transplanter comprises a connecting rod, a control arm, a running mechanism and knife rests, the front end of the connecting rod is rotatably connected with the fixing frame, the rear end of the connecting rod extends laterally towards two sides to form a hollow first connecting portion, the first connecting portion is connected with the running mechanism for driving the turf transplanter to move, thefront end of the control arm is rotatably connected with the fixing frame, the rear end of the control arm is divided into two symmetrical second connecting portions, the two second connecting portions are respectively provided with the knife rests, every knife rest generally has a sector-shaped shape, a cutting member is clamped between the two knife rests, the cutting member and knife plats areconnected by connecting pieces, a driving mechanism is arranged between the fixing frame and the turf transplanter, and the turf transplanter can be lowered and lifted relative to the fixing frame under the driving of the driving mechanism. The suspended turf transplanting machine can effectively speed up the turf pulling process and improve the greening grass transplanting efficiency.

The invention discloses porous ceramsite concrete. The porous ceramsite concrete is composed of cementing material slurry and porous ceramsite according to a mass ratio of 1:(0.05-0.2), and the cementing material slurry is formed by mixing a cementing material, water, fine aggregate and a polycarboxylic acid high-efficiency water reducing agent. The invention also discloses a preparation method and application of the porous ceramsite concrete. According to the method provided by the invention, a ratio of the porous ceramsite to the cementing material slurry is reasonably adjusted, the pre-wettreated porous ceramsite is spread in a concrete mold, the cementing material slurry is poured into the upper layer of the wet porous ceramsite, the upper layer of the porous ceramsite is pressed by using a cover plate with a same material as the mold, vibration is performed by using a vibrating rod, the material is allowed to stand, and curing is performed to obtain the porous ceramsite concrete;and the structure of the porous ceramics can be prevented from being destroyed due to stirring, the condition that ceramsite concrete has easy layered segregation can be improved, and the prepared porous ceramsite concrete has the characteristics of a low apparent density, high strength and good heat insulation and sound insulation, and can be widely used in various construction projects.

The invention relates to the technical field of AGV, in particular to a holding type AGV. The holding type AGV comprises a base and a clamping device, wherein the base is arranged on a vehicle head, and the clamping device is arranged on a vehicle tail; the clamping device comprises a clamping part and a first driving device used for driving the clamping part to move; power devices and connectingrod devices arranged on the power devices are arranged on the two sides of the base; and each connecting rod device comprises a first connecting rod, a second connecting rod, a telescopic rod and an elastic piece, wherein the two ends of the first connecting rod and the two ends of the second connecting rod are correspondingly hinged with the base and the power device, the two ends of the telescopic rod are correspondingly hinged with the base and the second connecting rod, and the elastic piece sleeves the telescopic rod. The clamping device drives the clamping part by using the first drivingdevice to clamp or loosen materials; and then the materials are transported by the AGV; and moreover, as the power devices and the clamping device are correspondingly arranged on the vehicle head andthe vehicle tail, the power devices possess enough power to drive the AGV to run when the clamping device is in working; the independent connecting rod devices are arranged on the power devices on the left and right sides of the base, a purpose of absorbing the shocks of the power devices through the deformation of the elastic pieces when the AGV runs on bumpy and complicated road surfaces.

The invention provides a volumetric flask fixture, comprising a main base and an anti-floating support mounted on the main base; the main base includes a bottom base and a connection rod vertically fixed onto the bottom base; the anti-floating support includes a first vertical rod vertically connected to the connection rod, a transverse rod horizontally arranged and having one end connected to theupper end of the first vertical rod, a second vertical rod having the upper end connected with the other end of the transverse rod, and an anti-floating member arranged at the lower end of the secondvertical rod; the anti-floating member is provided with an opening allowing a bottleneck of the volumetric flask to pass through; the anti-floating member applies, along the edge of the opening, a downward pressure to the belly of the volumetric flask in order to prevent the volumetric flask from floating on a liquid; when the volumetric flask is immersed in the liquid to carry out ultrasonic washing, the anti-floating member can overcome floating force that the volumetric flask bears and enable the volumetric flask to be constantly immersed in the liquid, thereby avoiding floating; ultrasonic washing effect is guaranteed, and therefore, smooth progress of an experiment and accuracy of test data are guaranteed.

The invention discloses Sn-Bi system composite brazing filler metal for electronic packaging and a preparation method of the Sn-Bi system composite brazing filler metal. The problems that alloy ductility is lowered due to the Bi-rich phase with the hard brittle property in Sn-58Bi brazing filler metal and the reliability of a brazing filer metal connector becomes poor due to an excessively thick intermetallic compound in the remelting service and aging process are solved. The method comprises the steps that a graphene/cerium oxide composite enhanced body is prepared; 2, the enhanced body and a brazing filler metal base body are subjected to ball milling and mixed; 3, flux paste is added into the enhanced body and the brazing filler metal to be stirred to be uniform; and 4, the mixture is placed into a crucible and heated at the temperature of 180 DEG C, taken out, poured into a mold and cooled, and therefore a composite brazing filler metal block is obtained. According to the composite brazing filler metal, the welding spot microstructure is refined, the hardness of the brazing filler metal is greatly improved, the thickness of the intermetallic compound in the interface between the brazing filler metal and the base body is reduced, and therefore the shear strength of the welding spot is improved. The preparation method is used for preparing the Sn-Bi system composite brazing filler metal.

The invention discloses a pile foundation steel reinforcement cage anti-floating device. The pile foundation steel reinforcement cage anti-floating device includes a cross-shaped track and a bar-shaped channel steel; the cross-shaped track and the bar-shaped channel steel are connected to form a frame through connecting pieces; the frame is fixed at the lower end of the steel reinforcement cage; the two ends of the bar-shaped channel steel pass through the wall of the steel casing; and the cross-shaped track is located under the bar-shaped channel steel; wherein the center of the bar-shaped channel steel is provided with a reserved hole, a threaded steel pipe is penetrated into the reserved hole, and the lower end of the threaded steel pipe is provided with a steel drill in flexible connection that is connected in the circumferential direction; when the threaded steel pipe is pushed down, the free end of the steel drill moves in the cross-shaped track; and after the steel drill reachesa target position, the threaded steel pipe is fixed on the bar-shaped channel steel. The pile foundation steel reinforcement cage anti-floating device avoids the phenomenon that the steel reinforcement cage floats up when the concrete is poured, and improves the quality of the pile foundation. When the pile foundation steel reinforcement cage anti-floating device is used for the construction of acast-in-place pile, the device is not connected to the steel reinforcement cage, the base material is not damaged, and the device is easy to take out, which has high stability, can be reused many times, and is economical.

An adjustable head and neck positioning frame for tumor radiotherapy disclosed by the present invention comprises a supporting seat, the upper end of the supporting seat is provided with a supporting column, the lower end of the supporting seat is provided with a matching groove, the upper end of the supporting column is provided with a concave headrest, the outer side of the supporting column is provided with a fixing block, the lower end of the fixing block is provided with a threaded seat, and the threaded seat is provided with a screw. A neck supporting seat is arranged on the right side of the concave headrest, and a smooth guide supporting plate is arranged in the matching groove. The positioning frame has the beneficial effects that the concave headrest can be adjusted so as to achieve the comfort required by a patient, the positioning frame is suitable for patients of different age groups, the application range of the positioning frame can be effectively expanded, the head of the patient can be fixed, the head of the patient is prevented from shaking in the radiotherapy process, and the safety during radiotherapy is improved; the neck of the patient can be supported, so that the neck of the patient can be relaxed in the treatment process, and the comfort of the patient in the radiotherapy process can be improved.