72results about How to "Reduce contact frequency" patented technology

A three-dimensional printing system calculates a resin amount required to print a three-dimensional object by curing a liquid photo-curable resin and sequentially stacking layers of the cured resin each having a predetermined cross-sectional shape. The system includes a first storage section configured to store information of a three-dimensional object, and information of an auxiliary member that supports the three-dimensional object, a first calculation section configured to calculate a resin amount necessary to print the three-dimensional object and a resin amount necessary to print the auxiliary member based on the information of the three-dimensional object and the auxiliary member stored in the first storage section, an output section configured to output a first resin amount that is the sum of the calculated resin amounts necessary to print the three-dimensional object and the auxiliary member, and a three-dimensional printing apparatus.

The invention relates to a compound fertilizer preparation method for improving the utilization rate of the phosphorus element. The method comprises the following steps: mixing molten urea or molten ammonium nitrate with a potash fertilizer and a filler to obtain a mixture; carrying out blending chelating on one or a mixture of more of potassium fulvate, ammonium humate and monoammonium phosphate and the mixture; defoaming the above blend-chelated product by a defoaming agent; sending the defoamed product to a high tower mixing tank, and carrying out high tower granulation; processing a composition comprising, by weight, 5 parts of guar gum, 3 parts of nonionic polyacrylamide and 2 parts of potassium polyacrylate to prepare a liquid with 10% of the composition, and uniformly sprinkling the surface of a granulated granular fertilizer with the liquid to wrap the fertilizer. The compound fertilizer adopting potassium fulvate or ammonium humate as an organic matter has the advantages of high content of nutrients, good dissolvability, low water content, reduction of the frequency of contact of phosphate radicals with metal ions, reduction of the curing probability of phosphorus, and improvement of the utilization rate of a phosphate fertilizer.

The invention provides a railway tunnel vault deicing device, and relates to the technical field of railway transportation. The railway tunnel vault deicing device comprises connecting parts, slidingdevices, deicing mechanisms, ice melting mechanisms and rolling wheels; the ice melting mechanisms are arranged at the top ends and the bottom ends of the connecting parts, cleaned broken ice is melted through the ice melting mechanisms, and the ice melting mechanisms are fixedly connected with the top ends and the bottom ends of the connecting parts; the deicing mechanisms are arranged between the connecting parts, and the deicing mechanisms are used for removing ice columns on a vault and ice on the surface of the vault; the left end and the right end of each deicing mechanism are fixedly connected with the corresponding connecting part; sliding devices are arranged at the bottom ends of the deicing mechanism so that the deicing mechanisms can be conveniently attached to the vault to remove ice; and the top ends of the sliding devices are in sliding connection with the top ends of the deicing mechanisms, the rolling wheels are arranged at the bottom ends of the sliding devices, and the rolling wheels penetrate through the bottom ends of the sliding devices to be rotationally connected with the bottom ends of the sliding devices. The problem that ice on the surface of the vault cannot be removed when the vault is deiced so as to cause secondary icing easily is solved.

The invention discloses a human peripheral blood chromosome synchronization preparation kit which comprises thymidine, 2'-deoxycytidine, colchicine, a 1640 culture medium and a fixing solution. According to the kit, growth cycles of peripheral blood lymphocytes are synchronized, enough 500-550 chromosome karyotypes with stripes can be obtained, so that chromosomal aberration and small abnormal structures are accurately identified. The synchronization kit adopting excessive thymidine single occlusion, deoxycytidine releasing and ethanol acetic acid harvesting is capable of increasing resolution ratio, simple in operation steps, capable of reducing the contact frequency of toxic reagents, and suitable for wide and conventional application.

A transparent conductor includes a film-shaped or plate-shaped support and a transparent conductive layer that is disposed on the support and has a surface formed as a rough surface. The surface of the transparent conductive layer is formed so that a maximum peak height that shows a surface roughness of the surface is in a range of 0.35 μm to 0.43 μm, inclusive.

The invention discloses a helical tape mixing machine which comprises a hollow shell, a feeding hole, a discharge opening and a stirring shaft, wherein the top end and two opposite side ends of the hollow shell are open; side plates are respectively fixed on the end surfaces of the side ends; a cover plate is fixed on the end surface of the top end; the feeding hole and the discharge opening are respectively fixed in the two side ends; a first material enters from the feeding hole; a nozzle is arranged on the feeding hole; a second material is ejected from the nozzle and is mixed with the first material so as to enter the hollow shell; the stirring shaft is positioned in the hollow shell; two ends of the stirring shaft are respectively rotationally fixed on the two side plates; a helical tape is fixed on the stirring shaft; a scraper is fixed on the helical tape; and when the stirring shaft rotates, the helical tape and the scraper are driven to rotate, so that the mixture of the first material and the second material is stirred and pushed to the discharge opening, and the mixture is discharged from the discharge opening. The mixing machine provided by the invention is used for solving the technical problems in the prior art that the materials are non-uniformly mixed and the powder content is high. The technical effects of improving the uniformity of the mixed materials and reducing the powder content are achieved.

The invention discloses a work roll shifting method used for hot rolled strip steel same-width rolling conditions. The frequency of contact between the middle of a roll body of a work roll and strip steel is reduced, the frequency of contact between the edge portion of the work roll and the strip steel is increased, accordingly, the advantage of the length of the roll body of the work roll is fully utilized, abrasion of the middle of the work roll is scattered, abrasion of the work roll is uniform and is relieved to a larger extent, and the ability of the roll shape of the work roll to adjustthe plate shape in the service period is better maintained.

A method of synchronization adjustment is applied to an optical detecting device, so as to synchronize an exposure timing sequence of an image detector with a light emitting timing sequence of an indicating light source. The method includes acquiring a continued image set, analyzing intensity of each image of the continued image set, and adjusting the exposure timing sequence according to duty cycle of the image detector and intensity ratio of at least two images. An exposure frequency of the image detector is greater than a flickering frequency of the indicating light source.

The invention provides a bee observation box and a bee colony research system, and relates to the technical field of biological research. The observation box comprises a box frame, a transparent board, a box cover, a honeycomb frame, a transmission assembly and a regulating part, wherein the box frame is approximately U-shaped; each convex arm of the box frame is provided with a chute and an inner cavity; two ends of each chute are respectively provided with a through hole communicating with each inner cavity; the beecomb frame is provided with slide blocks; each slide block is slidably accommodated in each chute; the transmission assembly comprises pulley units respectively arranged in each inner cavity; each pulley unit comprises a first wire wheel, a second wire wheel and pull ropes, wherein one pull rope is connected with one end of a slide block and winds around the first wire wheel through one through hole, and another pull rope is connected with the other end of the slide block and winds around the second wire wheel through the other through hole; each second wire wheel is provided with a torsional spring; the transmission assembly also comprises a transmission belt which connects two first wire wheels in constant rotation speed; and the adjusting part is used for rotating the first wire wheels. The bee colony research system comprises the above-mentioned observation box. The bee colony research system and the bee observation box can enable beecombs to be smoothly placed and removed, reduce direct contact with the beecombs and damage to bees, and have little interference to the bees.

The invention relates to the technical field of sewage treatment, and discloses flocculating agent dissolving equipment for a sewage treatment tank, the flocculating agent dissolving equipment comprises a machine body, the inner bottom end of the machine body is fixedly connected with a lower cavity, the middle part of the inner bottom end of the lower cavity is fixedly connected with a rotating assembly, and the movable shaft of the rotating assembly is movably connected with the top end of the lower cavity in a sleeving manner; the top end of the rotating assembly located outside the lower cavity is fixedly connected with two stirring rods, a stirring block is arranged at the top end of one stirring rod, and a square hole is formed in the middle of the top end of the machine body. The stirring block is arranged at the top end of one stirring rod, so that the stirring rod drives the blocking assembly on a main plate to swing to open the discharging hole in the rotating process, and a flocculating agent located in a feeding part equivalently falls into the machine body at a constant speed to be mixed with an aqueous solution; the flocculating agent is effectively prevented from being agglomerated or blocked too much due to too much or too fast one-time addition, and the dissolving efficiency of the flocculating agent is improved.

A bearing which can satisfy the demand for a reduction in cost and for improved quietness and which can, in addition, stably maintain high supporting accuracy. A slide bearing (4) provided with an inner member (5) which has a mounting surface (9) mounted to a rotating shaft (2), and also with a mounting surface which is disposed on the inner member (5) on the outer diameter side thereof and is mounted to a stationary member. A thick-walled section (5a) which is a protrusion section (P) is provided to the inner member (5), and a radial bearing clearance in which a lubricating oil is disposed is formed between the outer peripheral surface (5a1) of the thick-walled section (5a) and the inner peripheral surface (7a1) of an outer member (6), said inner peripheral surface (7a1) facing the outer peripheral surface (5a1). Seal clearances (S, S) for retaining the oil surfaces of the lubricating oil at positions on both sides of the radial bearing clearance in the axial direction are formed between the inner member (5) and the outer member (6). At least a portion of the mounting surface (9) of the inner member (5) consists of metal.

A thermal printer includes a thermal head which has heating elements arranged in a main scanning direction, a transport unit for transporting a thermal recording material in a sub scanning direction perpendicular to the main scanning direction and a skewing unit for skewing the thermal recording material so that its ends in the main scanning direction form an angle with respect to the sub scanning direction at a predetermined recording position. The thermal recording material that has been skewed so that its ends form the angle is supplied to the recording position, and the thermal recording on the thermal recording material is performed with the thermal head while the thermal recording material that remains skewed is transported in the sub scanning direction.

The invention provides a worn steel wire rope core conveyor belt reusing method and belongs to the technical field of conveyor belt transmission. By means of the worn steel wire rope core conveyor belt reusing method, the technical problem of resource waste caused by directly replacing worn conveyor belts with new conveyor belts is solved. The solution scheme comprises the following steps that a,the scratched degree of the working surface of the steel wire rope core conveyor belt is recognized; b, the worn steel wire rope core conveyor belt is cut off; c, the cut-off steel wire rope core conveyor belt is formed into a mobius ring structure; d, the steel wire rope core conveyor belt of the mobius ring structure is slowly pulled to move utilizing a loading machine to make the non-working surface of the worn steel wire rope core conveyor belt run to one side of the outer surface; e, the conveyor belt in the step d is cut off again to make the non-working surface of the worn steel wire rope core conveyor belt all run to one side of the outer surface, and overall overturning of the steel wire rope core conveyor belt is finished. By means of the worn steel wire rope core conveyor belt reusing method, the service life of the steel wire rope core conveyor belt is greatly prolonged, the production cost is lowered, spilling of materials along the route is reduced, the material cleaningtimes is reduced, the frequency of man-machine contact is lowered, and safety hazards are reduced.

The invention relates to a smelting method for reducing nitrogen increase in molten steel in a converter process. The smelting method comprises the following steps: limiting the nitrogen content and size of a waste steel raw material, changing bottom argon blowing in the early stage of a converter into nitrogen-argon combined blowing, increasing the gas flow, adopting bottom pure argon blowing in the middle and later stages of smelting, and increasing the bottom blowing gas flow; the smelting final temperature is smaller than or equal to 1630 DEG C, an oxygen lance is switched into argon, and argon is blown into the converter for 10-30 s; in the tapping process, 1.0 Kg/t to 1.2 Kg/t of calcium carbide is added to the bottom of a steel ladle in advance before tapping, 0.5 Kg/t to 1.0 Kg/t of calcium carbide is thrown in a steel flow impact area in the tapping process, CO generated by calcium carbide deoxidation is used for forming an air curtain, molten steel is isolated from air, and nitrogen absorption of the molten steel is reduced; the content of [O] in the molten steel in the tapping process is controlled to be (200-400) * 10 <-4 >%; bottom argon blowing of the steel ladle is started 20 seconds before tapping, air in the steel ladle is emptied, argon is stopped immediately after tapping is finished from 20 seconds before tapping to the end of tapping, and the steel ladle is covered for heat preservation to prevent molten steel from being exposed to increase nitrogen; the method is simple and clear in technological process, high in operability and easy to control.

The invention discloses a process and a device for continuously producing bentazone intermediate o-aminobenzoic acid isopropyl amine by taking phthalimide as a raw material. The process comprises thefollowing steps: (1) adding phthalimide solid and pure water into a reaction kettle, stirring at a low speed, adding a 32% sodium hydroxide solution, and stirring at normal temperature for 30 minutes;(2) respectively feeding the phthalimide sodium salt solution and the sodium hypochlorite solution into a micro-channel reactor according to a certain flow rate, carrying out a Huffman rearrangementreaction at a low temperature, and feeding the mixture into a temporary storage tank; (4) mixing the reaction solution in the temporary storage tank 1 with hydrochloric acid (or sulfuric acid and thelike) through a static mixer, feeding the mixture into a reaction kettle, heating the mixture to room temperature, adding an isopropylamine aqueous solution at a certain flow rate, and continuously stirring for 2-3 hours; (4) enabling the solution to pass through a plate-and-frame filter press, returning the filtrate to the first step for repeated application, and drying the filter cake to obtainisatoic anhydride with the purity of 99% or above.

The invention discloses a new process for boning a roasted duck. In the process, boning steps are set according to the physiological structure of the duck; the conventional boning sequence of the roasted duck is changed, namely the meat on shinbone is first cut open, shinbone is removed and then truck bone, bones of upper limb and thighbone are removed in turn; and thus the skeleton of the roasted duck is completely removed by the least cutting. The process comprises the following steps of: 1, selecting; 2, ripping the back; 3, ripping the breast; 4, removing the shinbone; 5, separating the brisket; 6, removing the shoulder joint; 7, removing the thighbone; 8, separating the truck bone; 9, removing the wing bone; 10, removing the thighbone; 11, trimming; 12, sterilizing; and 13, packaging under vacuum. In the process, the bone steps are set according to the physiological structure of the duck, and the skeleton of the roasted duck is completely removed by the least cutting; and thus the labor intensity of workers is reduced, the qualification rate of the finished product of the product is increased, the completeness and attractive appearance of the product are ensured, the contact frequency between a cutter and the duck meat and between an operating hand and the duck meat is reduced, the man-made pollution is prevented, and the hygiene standard is guaranteed.