88results about How to "Reduce the chance of secondary pollution" patented technology

The invention discloses a full corrosion-resistant connection structure of a steel lining plastic composite pipeline, and belongs to the technical field of connection of the steel lining plastic composite pipeline. The structure comprises a corrosion-resistant ring sleeved on a non-meshing section of an external thread of a steel outer layer, a steel lining plastic composite pipe fitting consisting of a steel outer ring part and a plastic inner ring part, and a composite pipe consisting of the steel outer layer with the external thread, and a plastic inner layer, wherein the external thread consists of a meshing section and the non-meshing section; an annular cavity of which the inner wall is provided with an internal thread section is formed between the steel outer ring part and the plastic inner ring part; the pipe is in threaded connection with the pipe fitting; a solid hot melt adhesive is arranged in the annular cavity; when an alternating magnetic field is formed at the periphery of the joint of the pipe fitting and the pipe, the solid hot melt adhesive is in thread engagement with the steel outer ring part and in sealed connection with the end faces of the steel outer layer and the plastic inner layer; and the corrosion-resistant ring is in sealed connection with the non-meshing section of the pipe. After the scheme is adopted, the problem that the threads of the pipe and the pipe fitting are easily corroded and rusted is solved, and a full corrosion-resistant threaded connection effect is achieved.

The invention relates to movable soil heavy metal extracting method and system. A soil heavy metal extractor is placed on a moving device, such as a vehicle and the like, thus the cost of conveying polluted soil is reduced and secondary pollution caused by the polluted soil during the conveying is avoided. In addition, the polluted soil is subjected to screening, extraction, dewatering and recycling at a generating source, and then respectively subjected to corresponding subsequent treatment processes, and thus time and cost spent in various subsequent treatment processes are reduced.

The production method of soft magnetic alloy powder includes the following steps: smelting soft magnetic mother alloy, making molten metal be quickly coagulated into crystalline sheet alloy, breaking the sheet alloy to obtain alloy powder, and making the alloy powder undergo the processes of activation, annealing treatment and passivation treatment. Said soft magnetic alloy powder is low in oxygen content, stable in property and good in magnetic powder core performance.

The invention relates to an automatic cleaning system of a conical spiral mixer and a cleaning technology for the conical spiral mixer. The automatic cleaning system comprises a control system; a group of fixed nozzles are mounted on the side wall of a mixer cylinder body; spiral cleaning nozzles are arranged at the center of the mixer cylinder body and mounted downward from the top end of a mixer common rotation drive device; a sensing localization device is mounted at the top end of the mixer common rotation drive device; the sensing localization device is relative to a stirring propeller in position; a water treatment recycle system comprises a clean water storage tank, a return water storage tank, an acid-alkali liquor storage tank, an acid-alkali liquor addition pump, a centrifugal filter, a cleaning water pump and a pipeline valve; under the effects of the control system, the water treatment recycle system can be used for flexibly switching the technology steps of adding water, heating, washing with hot water, cleaning with alkali liquor, washing with the hot water, cleaning with acid liquor, washing with the hot water, and carrying out return water treatment.

The invention provides a horizontal type three-phase biological fluidized bed and a sewage treatment method thereof. According to the horizontal type three-phase biological fluidized bed, a water inlet and water distribution anaerobic zone, a high-load facultative biological treatment zone, a baffling zone, a low-load aerobic biological treatment zone and a settling pond are horizontally arranged from a water inlet end to a water outlet end, and moreover suspended biological stuffing layers are arranged inside other zones except the baffling zone. Sewage is fed into the water inlet and water distribution anaerobic zone, in an anaerobic environment, BOD organic maters in the wastewater are converted into a fermentation product by facultative fermentation bacteria, polymerized phosphate stored in the cells is decomposed by phosphorus-accumulating bacteria, and then the sewage is fed into the high-load facultative biological treatment zone to remove COD and nitrogen, is further fed into the low-load aerobic biological treatment zone to reduce phosphorus in the effluent, and is finally settled, clarified and filtered by the settling pond so as to obtain clean water. As all process steps are accomplished in one same horizontal pond, the land is saved, the phenomenon that equipment such as a pump and a valve is blocked when dispersed type stuffing is adopted to treat sewage is avoided, and a carrier is prevented from loss, piling or hardening.

A technology for reproducing trichogramma with gelechiid ova in industrial mode incldues light-shielding vertical raising, automatical collection of mothes, removing dust and impurities and continuous reproduction.

The invention belongs to the field of biotechnology, and particularly relates to a beta-glucosaccharase which can decompose lactose and has high activity under both high-temperature and low-temperature conditions, and a gene engineering bacterium capable of efficiently expressing secretion-type beta-glucosaccharase. The invention discloses a beta-glucosaccharase having an amino acid sequence disclosed as SEQ ID NO:2, and constructs a gene engineering bacterium capable of efficiently secreting the beta-glucosaccharase. The gene engineering bacterium is collected in Common Microorganism Center of Committee for Culture Collection of Microorganisms, and the collection number is CGMCC No.4891. The beta-glucosaccharase produced by the method disclosed by the invention has high activity of galactosidase, and can be applied to dairy industry; and meanwhile, the beta-glucosaccharase has stable activity within wide pH value range and temperature range.

The invention provides an automatic onion root/stem cutting machine. The machine comprises a round rotary table which is in a stepping type, wherein a plurality of U-shaped onion head clamps are arranged on the circumference of the round rotary table and are used for clamping onion heads. The machine is characterized in that the roots and stems are automatically cut off by upper and lower rotary cutting blades; the round rotary table and a shell are provided with electromagnetic positioners; the rotary table rotates in a stepping manner during work; and when the raw materials are fed into the clamps manually, push rods automatically lock the clamps due to displacement and the clamps clamp the onion heads under the action of springs, the rotary table steps at a certain angle, the clamped onions are moved to the rotary cutting blades and are locked by the electromagnetic positioners, as the electromagnetic positioners and a rotary blade driving motor are interlocked, the rotary cutting motor is started at the moment to drive the upper and lower cutting blades to simultaneously cut the roots and stems of the onions, the blades return after completing cutting and the round rotary table continues rotating forward in a stepping manner and comes to a discharge opening for discharge.

The invention discloses a biological detection material collection and storage device. The biological detection material collection and storage device comprises a transparent casing pipe with one open end and a casing pipe plug for sealing, wherein a cotton swab extending into the casing pipe is arranged on the casing pipe plug; a drying agent capable of quickly absorbing water and indicating humidity is placed at the bottom of the transparent casing pipe; and grids for fixing the drying agent at the bottom of the transparent casing pipe are arranged in the transparent casing pipe. The biological detection material collection and storage device integrates collection, packaging, storage and drying functions.

The invention discloses an ethylene vinyl-acetate (EVA) cutting mechanism. A motor mounting seat is connected with a motor mounting plate; a motor is arranged on the motor mounting plate; a driving wheel is arranged on the left side of the motor; the driving wheel is connected with a driven wheel through a synchronous belt; the driven wheel is arranged at the left end of a main shaft; an eccentric wheel is arranged on the right side of the driven wheel on the main shaft; a bearing with a seat is arranged between the driven wheel and the eccentric wheel; the eccentric wheel is arranged on the bearing with the bearing seat; the bearing with the bearing seat is connected with a connecting rod seat. According to the technical scheme of mechanical cutting, labor cost is saved, cutting errors are small, and materials and cost can be directly saved; the probability of secondary pollution is small, and the probability of contacting with hand perspiration and dirty staff and the like in manual cutting is reduced; static electricity can be eliminated, so that the influence of static electricity on materials is avoided, and multiple problems existing in manual operation are solved in mechanical operation; the cutting mechanism is simple in mechanical operation and convenient to use.

The invention belongs to the pickling sludge recovery technical field, and specifically discloses a method for production and recovery of precious metals on the basis of pickling sludge, and the method includes crushing, press-filtering, first impurity removal, secondary impurity removal, nickel sulfate crystallization, rock wool preparation and flue gas dust removal step. The beneficial effects of the method for production and recovery of the precious metals on the basis of pickling sludge are that: precious metals in the pickling sludge can be recovered by high-pressured acid leaching, after the recovery, waste residue is comprehensively treated to produce iron alloy and rock wool products, SO2 in the exhaust gas produced in a reduction melting furnace can be recovered to produce sulfuric acid, compared with a traditional wet method, all available metals can be extracted from waste, secondary pollution probability is reduced, energy consumption is reduced, and zero discharge of industrial wastewater can be achieved.

The invention relates to an emulsion type gel preparation containing chlorhexidine and ethanol. The emulsion type gel preparation containing chlorhexidine and ethanol comprises the following components by weight percentage: 0.5 to 5 of the chlorhexidine; 30 to 70 of the ethanol; 3 to 10 of stearic acid; 2 to 5 of white petrolatum; 0.5 to 3 of lanoline; 0.5 to 2 of triethanolamine; 1 to 5 of glycerin; 0.1 to 1 of xanthan gum; allowance of water. The stearic acid, the white petrolatum and the lanoline are heated to 70 DEG C to 80 DEG C and mixed evenly, thus obtaining solution A; the chlorhexidine, the triethanolamine, the glycerin, the xanthan gum and the water are heated to 70 DEG C to 80 DEG C, stirred and dissolved, thus obtaining solution B; when stirring, the solution A is added to the solution B slowly when the solution is hot, stirred continuously until the temperature is reduced to 50 DEG C to 60 DEG C naturally; the ethanol is added and stirred for 1 hour to 2 hours, thus obtaining the emulsion type gel preparation. The emulsion type gel preparation has stable property, fast evaporation speed after being used, high moisture retention and no obvious viscosity to skin and good use feeling.

The invention relates to a tea base steaming device and an in-mold steaming molding process, wherein the tea base steaming device comprises a compacting mold and a steaming component, and the in-mold steaming molding process comprises the following steps of mounting the tea base steaming device, steaming a tea base and compacting the tea base. During working, a well weighed raw material of the tea base is poured into a cavity to directly carry out steaming and compaction; the steaming time is adjustable and is further accurately controlled; the pressure range of steam is controllable; the automation is realized for a steaming procedure; the steaming efficiency is improved; the labor force is saved; further, the steaming extent is uniform and consistent; the pressure maintaining time of a tea brick is reduced; the quality of a finished-product brick is improved.

The invention relates to the technical field of cleaning devices, in particular to a cleaning device for automobile part production. The device comprises a cleaning box body, wherein the inner back wall of the cleaning box body is integrally provided with a fixing plate, lower cleaning brushes are rotatably arranged at equal intervals between the fixing plate and the front inner wall of the cleaning box body through bearings, the rear ends of the lower cleaning brushes extend to the rear outer wall of the cleaning box body to be provided with driving mechanisms I, and a top plate is arranged at the top of the cleaning box body through screws. A baffle plate is slid upwards, to-be-cleaned workpieces are fed to the left sides of the horizontally-arranged lower cleaning brushes from a feedingport formed in the left side of the cleaning box body, water is fed into the cleaning box body from a water inlet channel communicating with the upper part of the cleaning box body, and then a circulating pump and an electromagnetic valve are started to spray water at the bottom in the cleaning box body downwards to the upper parts of the lower cleaning brushes, upper cleaning brushes and soft bristle cleaning brushes by virtue of a plurality of spray heads at the bottom of the cleaning box body.

The invention discloses an automatic rotating disc type chromatographic column assembling device which comprises a rack, an operating platform arranged on the rack and a rotating disc arranged on the operating platform, wherein a feeding station, a photographing station, a code scanning station, a filling station, a cap screwing station, a tightness detection station and a discharging station are sequentially arranged on the edge of the rotating disc at equal intervals in the anti-clockwise direction; and a carrier for loading a to-be-assembled chromatographic column body is arranged on each of the stations. According to the invention, the automatic rotating disc type chromatographic column assembling device has the beneficial effects of being high in degree of automation, reducing the labor cost while improving the assembling efficiency, and greatly decreasing the probability of secondary pollution of a chromatographic column during the assembling process.

The invention discloses a heavy metal polluted bottom mud curing agent and a curing method thereof, and relates to the technical field of bottom mud treatment. The heavy metal polluted bottom mud curing agent comprises curing powder and a curing liquid which are matched for use, the curing powder is prepared from, by weight, 25 to 35 parts of a heavy metal stabilizer, 1 to 5 parts of water glass,2 to 4 parts of modified chitosan, 1.5 to 2 parts of ammonium persulfate and 1 to 2 parts of polyaluminum chloride, and the curing liquid agent is prepared from, by weight, 10 to 15 parts of polyacrylamide, 5 to 10 parts of sodium polystyrene sulfonate and 0.5 to 1.5 parts of glutaraldehyde. According to the heavy metal polluted bottom mud curing agent and the curing method thereof, the cured bottom mud is slightly neutral, subsequent resource utilization is better facilitated, the stability of heavy metal in the bottom mud is good, the heavy metal in the bottom mud cured product is dissolvedand released again, and the probability of secondary pollution is relatively small.

The invention discloses a method for inactivating virus in source plasma of a blood product. The method disclosed by the invention comprises the following steps: (1), mixing plasma; (2), stirring by adding a CaCl2 liquid, filtering and clarifying by using a filter element, thus obtaining a filtered liquid; (3), adding a mixed liquid of tween-80 and Tri-n-butyl phosphate (TNBP) so that the final volume percentages of tween-80 and TNBP are (1+/-0.3)% and (0.3+/-0.1)% respectively, keeping the temperature of reaction liquid at 24+/-2 DEG C, and keeping the constant temperature for 4-6 h; (4), adding vegetable oil so that the final volume percentage of vegetable oil is (5+/-2)%, and reducing the temperature of the reaction liquid to 16+/-2 DEG C; (5), stirring and standing; and (6), extracting, and eliminating an oil phase, thus obtaining a liquid phase. By means of the method disclosed by the invention, the safety of the source plasma is greatly increased; and the secondary pollution rate is reduced.

The present invention relates to the technical field of mutton processing and discloses a mutton processing device. The mutton processing device comprises a machine frame and a conveying mechanism arranged on the machine frame; the conveying mechanism comprises a conveyor belt, a driving roller and a driven roller; a washing mechanism is arranged on both sides along a conveyor belt width direction; the washing mechanism comprises washing boxes and waste water boxes; the waste water box is provided with a drainage board; the drainage board is located on both sides of the conveyor belt width direction; one side of the washing box is fixed with elastic members and spraying nozzles; water pumps are fixed in the washing boxes; positioning blocks are arranged on both sides of the driven roller along the conveyor belt width direction; the positioning block is provided with a groove; the groove is slidably connected with a wedge piece; a friction piece is fixed on the wedge piece; a collectingbox is arranged at the end of the conveying direction of the conveyor belt; the upper part of the collection box is hingedly connected with a limiting plate by a torsion spring; the lower side of thelimiting plate is provided with a sliding rod; the lower side of the sliding rod is connected with air bags; the collecting box is slidably connected with a piston plate; and the lower part of the piston plate is provided with a spring. The mutton processing device is simple in structure, and convenient for collection of mutton and convenient for the washing of the mutton.

The invention discloses a blood sampling needle assembling method. A needle bed supply station is adopted for inserting a needle bed into a positioning hole of a carrier so as to position the needle bed; a syringe needle is inserted into the needle bed positioned on the carrier through a thrusting needle station; a blood blocking sleeve supply station is used for placing the blood blocking sleeve into a needle bed with the inserted syringe needle; a blood blocking sleeve installation station is applied to pushing the blood blocking sleeve placed into the needle bed into the needle bed so as to assemble the blood blocking sleeve in place. According to the blood sampling needle assembling method, the needle bed supply station, the thrusting needle station, the blood blocking sleeve supply station and the blood blocking sleeve installation station are adopted to automatically complete working procedures; during assembling of the blood blocking sleeve, firstly, the blood blocking sleeve is placed into the needle bed through the blood blocking sleeve supply station, and then the blood blocking sleeve is pushed into the needle bed through the blood blocking sleeve installation station so as to assemble the blood blocking sleeve in place, so that full-automatic assembling of the blood sampling needle is achieved, the assembling efficiency is improved, and the probability of secondary pollution is decreased.

The invention discloses a therapeutic apparatus for postoperative venous crisis of severed finger replantation. The therapeutic apparatus comprises an electromagnetic valve, a timing switch, a connecting tube, a dropping bottle and a universal needle, wherein one end of the electromagnetic valve is connected with the timing switch through a connecting line, and the timing switch is externally connected with a power supply; the other end of the electromagnetic valve is connected with the connecting tube, one end of the connecting tube is connected with the dropping bottle which is located above the electromagnetic valve, the other end of the connecting tube is connected with the universal needle, and the universal needle is inserted into an incision of a replanted finger body. According to the therapeutic apparatus, a rinsing needle is arranged in the incision and has the function of a drainage tube; repeated injuries of local tissue due to the fact the incision is required to be opened by a sterile needle repeatedly because of closing of the incision are avoided; the needle cannot fall with finger position change and is more reliable when compared with manpower, great work pressure of a nurse is reduced, and the probability of secondary pollution of the incision is reduced; the bloodletting speed can be increased or decreased through adjustment of rinsing speed and frequency, and accordingly, illness needs are met.

The invention belongs to the technical field of food processing equipment, and provides pancake cooling equipment with an automatic feeding-discharging function. The pancake cooling equipment comprises a cooling device, an automatic feeding-discharging device, a moisturizing device and a turnover material collecting mechanism which are integrally arranged. The pancake cooling equipment has the advantages that the operation is simple and convenient, the working process can be simplified, the cooling equipment investment can be reduced, the automatic feeding-discharging function can be achieved, the cooling efficiency can be improved by 33-93%, and the occupied plant area can be reduced to be 30% or below of the original basis; and furthermore, the manpower can be saved, the labor intensity can be reduced, the contact between human and food as well as a scald injury can be avoided, pancakes can be prevented from being exposed over a large area in the air, the cooling time and humidity can be controlled conveniently, the excessive loss of water can be prevented, the possibility of secondary pollution can be lowered, and the food quality and hygiene can be guaranteed.

The invention discloses an assembly method of a butterfly wing type blood taking needle. The assembly method is applied to a blood taking needle assembly system. The blood taking needle assembly system comprises a needle handle mounting station, a needle insertion station, an angle detection station, a sleeve mounting station and a rotary disc. The blood taking needle comprises a needle head, a needle handle and a sleeve. The assembly method of the butterfly wing type blood taking needle comprises the steps of inserting the needle handle into a locating hole of a carrier carried by the rotary disc to locate the needle handle through adopting the needle handle mounting station; inserting the needle head into the needle handle located on the carrier through the needle insertion station; adjusting the angle of the needle head inserted into the needle handle through utilizing the angle detection station, so as to ensure that an included angle between a detection surface on the needle head inserted into the needle handle and a reference surface on the needle handle meets the design requirement; and mounting the sleeve on the needle handle of which the needle head angle is adjusted through utilizing the sleeve mounting station. According to the assembly method of the butterfly wing type blood taking needle provided by the invention, all procedures of assembly of the blood taking needle can be automatically achieved, full-automatic assembly of the blood taking needle is achieved, and the assembly efficiency and reliability are improved.

The invention discloses a negative pressure urine collection cup cover convenient for microscale sampling, and the negative pressure urine collection cup cover includes a cover top and a hanging brim hanging around the cover top; an annular seam allowance is formed in the inner side of the hanging brim, and is matched with a negative pressure urine collection cup rabbet to form a sealing structure; part of the cover top in the annular seam allowance extends downwards to form a cylindrical cavity for installation of a self-closing liquid conveying device; a microscale sample extraction hole and a turning cover are arranged the periphery of the cylindrical cavity on the cover top; the microscale sample extraction hole is a through hole; the turning cover is a thin-walled part, the middle part of the bottom wall of the turning cover extends downwards to form a bulge, and the bulge is tightly matched with the microscale sample extraction hole to form a sealing structure; the turning cover is in hinge joint with the cover top by a hinge joint structure; further improvement is that: the hinge joint structure comprises a hinge pin horizontally arranged on the periphery of the turning cover, and a hinge joint seat arranged on the top wall of the cover top; the hinge pin can be clamped in a hinge joint seat elastic card slot to rotate; and a turning piece is arranged on the periphery of the turning cover. The negative pressure urine collection cup cover can fast extract a microscale sample, and can significantly reduce the secondary pollution chance of urine in a negative pressure urine collection cup.