716results about How to "Prevent escape" patented technology

The invention discloses rapid die casting equipment for aluminum alloy die castings, and relates to the technical field of metal die casting. A first channel is formed in a die plate and an ejector rod, and a spray hole communicating with the first channel is formed in the ejector rod; according to the device, the mold release agent can be sprayed to the relatively-closed die-casting cavity in a mold closing state, the comprehensive uniformity of the mold release agent during adhesion is improved, the demolding effect after a die casting is formed is improved, the mold release agent is sprayed in the relatively-closed die-casting cavity, and the mold release effect is improved. According to the die-casting mold core, the release agent can be prevented from escaping outwards, the surrounding environment can be protected easily, waste of the release agent can be avoided, energy-saving, environment-friendly, green and efficient die-casting production is achieved, meanwhile, the spraying holes are formed in the cylindrical face of the end of the ejector rod, the spraying holes cannot be exposed when the ejector rod retracts into the die core, and the die-casting mold core is more environment-friendly. And interference to die-casting production due to the fact that the spraying holes are exposed in the die-casting cavity can be avoided.

The invention discloses a carbon storage space construction method for an artificial reconstruction plugging key layer, and the method comprises the following steps: S1, carrying out geological exploration, and determining the thickness and lithology of each overlying rock stratum; s2, determining the height of a gas guide fissure zone generated after the coal seam is mined by filling based on theoretical analysis and actual measurement data; s3, on the basis of geological data and the height of the gas-conducting fissure zone, the position of an artificial reconstruction plugging key layer and the position of a grouting layer are determined; s4, filling mining is carried out, grouting is carried out on overlying strata to reconstruct and block a key layer, and a carbon storage space is formed; and S5, carbon dioxide gas is injected into the goaf through a pipeline, carbon dioxide concentration monitoring is conducted on the working face while negative carbon filling is conducted, earth surface rock movement monitoring is conducted on the earth surface, and the negative carbon filling effect is judged. According to the method, the carbon storage space is formed by manually rebuilding and blocking the key layer while the gangue is filled, the space after coal mining can be effectively utilized for storing carbon dioxide, and emission of greenhouse gas is effectively reduced.

The invention discloses a method for improving the cooling effect of a pole winding based on a mixed-flow fan, and belongs to the technical field of cooling of high-rotating-speed and high-capacity hydraulic generators and pumped storage generator motors. Mixed-flow fans are arranged at the two ends of a magnetic yoke, and cooling air is divided into radial cooling air for cooling coils at the ends of the magnetic poles and axial cooling air entering the outer surfaces between the magnetic poles. An interelectrode outer surface ventilation cooling space is formed between every two adjacent pole windings, interelectrode ventilation partition plates which are axially arranged are arranged in the interelectrode outer surface ventilation cooling spaces, and separated axial ventilation air channels are formed by the interelectrode ventilation partition plates and the outer surfaces of the pole windings; therefore, rotor pole winding cooling of a high-rotating-speed and high-capacity hydro-generator and a pumped storage generator motor in which radial ventilation cooling cannot be adopted in a pole winding interelectrode area is ensured, and the problem that the difference between the cooling effects of the windward side and the leeward side of a traditional structure is large is solved.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention belongs to the technical field of mariculture, and particularly relates to a flexible deep sea truss aquaculture net cage which comprises a flexible net cage system, a stock bin barrel system is arranged in the middle of the flexible net cage system, and an overwater suspension corridor assembly is arranged between the top end of the flexible net cage system and the top end of the stock bin barrel system. An anchor cable system is arranged on the outer side of the circumference of the flexible net cage system. By designing the flexible net cage system, the weight of the culture net cage is increased by filling viscoplastic filling materials through the bottom annular thick supporting pipes and the stand columns, the gravity center of the net cage is reduced, and the safety of the culture net cage in the putting process and the stability in actual operation are improved; other supporting pipes, supporting pieces, stand columns in the stock bin barrel system and transverse annular supporting pipes are filled with seawater, net cage throwing is assisted, and balance weight is simple; due to the integral structural design, the net cage has seawater corrosion resistance, is firm in structure, can bear the impact of large waves and seawater, has certain water permeability and can keep the circulation of seawater.

The utility model discloses a horizontal packaging machine, and relates to the technical field of packaging machinery. The utility model discloses a quick release type feeding tailstock, material conveyer, film walking device, roll film forming device, longitudinal sealing device, horizontal sealing device and electrical appliance box, adopts quick release type feeding tailstock, has quick release function, is convenient to clean feeding tailstock, ensures the hygiene of material on quick release type feeding tailstock, improves the production efficiency, reduces the production cost, and improves the production efficiency. The film feeding device is arranged below the material conveying device, namely, a lower film feeding mode is adopted, so that materials are directly conveyed to a rolled film after being output from the quick-disassembly type feeding tailstock, the materials are prevented from making contact with other devices outside the quick-disassembly type feeding tailstock, sanitation of the materials to be packaged is guaranteed, meanwhile, a protective cover is arranged, and the protective cover can be used for protecting the materials to be packaged. External pollution is avoided during longitudinal sealing and transverse sealing, the quick-frozen materials are protected to a certain extent, corrosion of the packaging machine caused by water vapor of the quick-frozen food is avoided, and the packaging machine can be waterproof and moistureproof.

The invention relates to the technical field of polyurethane coatings, and discloses a preparation method of an antibacterial wear-resistant waterborne polyurethane coating, which comprises the following steps: taking concentrated hydrochloric acid, p-phenylenediamine, sodium nitrite, paraformaldehyde, amino-modified nano silicon dioxide and hexamethylene diisocyanate as raw materials; the preparation method comprises the following steps: taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as a raw material, carrying out diazotization coupling reaction, substitution reaction, Mannich reaction and addition reaction to prepare modified polyisocyanate, then taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ((2-aminoethyl) azadiyl) dimethanol as raw materials, carrying out substitution reaction to prepare DOPO-based dihydric alcohol, and carrying out reaction to prepare the DOPO-based dihydric alcohol. Finally, the modified polyisocyanate, DOPO-based dihydric alcohol and polyethylene glycol 400 are used as raw materials, an antibacterial wear-resistant polyurethane emulsion is prepared through a prepolymerization reaction and a chain extension reaction, and the prepared polyurethane coating has good antibacterial, anti-ultraviolet, flame-retardant and wear-resistant properties.

The invention discloses a multi-roller system used after cast film stripping and a stripping chamber with the multi-roller system. The multi-roller system comprises a guide roller, a traction roller and a gravity roller which are arranged on a rack of the multi-roller system. The traction roller is located on the downstream side of the stripping roller, and one or more guide rollers are arranged between the traction roller and the stripping roller at intervals; the traction roller comprises two driving rollers which are arranged adjacently, and the film conveying path is of an S-shaped structure at the traction roller; the gravity roller is located on the downstream side of the traction roller, and the gravity roller and the gravity roller balance weight mechanism are arranged on the same closed chain or arranged on the two closed chains through a synchronous transmission mechanism respectively. According to the scheme, the problems that embossing is generated, the film thickness is affected and the like are avoided, constant tension is provided through gravity or other modes, tension adjustment is achieved, and micro longitudinal stretching is carried out; therefore, the film quality is improved. A negative pressure air curtain device is preferably arranged in the stripping chamber, so that the process environment control stability and the system safety are remarkably improved.

The invention relates to the technical field of medical instruments, in particular to a balloon delivery microcatheter and a using method thereof.The microcatheter comprises a handle, a balloon delivery pipe, a balloon delivery pipe and a balloon delivery pipe, the catheter body is connected with the handle, and the catheter body sequentially comprises a near-end tube, a balloon tube and a far-end tube from near to far; wherein the catheter body is of a double-cavity structure and comprises an inner cavity and an outer cavity, the inner cavity is a channel, one end of the inner cavity is communicated with the first connector, and the other end of the inner cavity penetrates to the end of the far-end tube and is used for conveying instruments, therapeutic drugs or diagnostic radiography liquid; one end of the outer cavity is communicated with the second connector, the other end of the outer cavity is communicated with the balloon tube, and the outer cavity is used for filling and pressure relief of the balloon tube. The balloon catheter has the functions of a micro catheter and a balloon catheter, a near-end blood vessel can be blocked, temporary blocking of local blood flow is achieved, the balloon catheter is further used for expanding the position, not attached to the wall, of an intravascular stent, the stent can be better attached to the blood vessel wall, and therefore pain and risks of a patient are reduced.

The utility model provides a range hood and a kitchen system including the same, the range hood comprises a smoke collecting hood, the air inlet surface of the smoke collecting hood facing a stove is provided with a main air inlet area and at least one auxiliary air inlet area, the suction force of the main air inlet area is greater than that of each auxiliary air inlet area, and the suction force of each auxiliary air inlet area is greater than that of the main air inlet area. The at least one auxiliary air inlet area is located at one end of the main air inlet area, the range hood further comprises a partition part, the partition part is located in the exhaust fume collecting hood and covers the main air inlet area so as to separate the main air inlet area from the auxiliary air inlet areas, and an outlet is formed in at least one surface, away from the auxiliary air inlet area, of the partition part. The suction force of the main air inlet area is larger than that of each auxiliary air inlet area, so that the air inlet amount of the main air inlet area is larger than that of the auxiliary air inlet areas. By adopting the structural form, the airflow of the auxiliary air inlet area is not influenced by the airflow of the main air inlet area, so that the problem that the instantaneous resistance at the inlet of the auxiliary air inlet area is instantaneously increased is solved, and the lampblack can be prevented from escaping.

The invention discloses a self-induction fire extinguishing material, a fire extinguishing rope and application, and relates to the technical field of electrical safety, and the self-induction fire extinguishing material is prepared from the following components in percentage by mass: 84.6 to 88 weight percent of perfluorohexanone, 4.8 to 5.6 weight percent of SiO2-CaO-Chit, 5.5 to 6.8 weight percent of epoxy resin, 1.8 to 2.3 weight percent of glass fiber, 0.01 to 0.2 weight percent of tributyl phosphate and 0.01 to 0.2 weight percent of sodium hydroxide. The preparation method of the SiO2-CaO Chit comprises the following steps: step 1, preparing raw materials: taking chitosan, SiO2, CaO, isopropyl acetate and deionized water for standby application; step 2, primary reaction: putting chitosan into deionized water, activating and washing to obtain activated chitosan; step 3, secondary reaction: mixing the activated chitosan, deionized water and isopropyl acetate, stirring, cooling, filtering and collecting a solid material to obtain a secondary reaction fixing material; and step 4, composite reaction: mixing SiO2 with CaO, adding a secondary reaction fixing material, continuously stirring until the mixture is uniform, and cooling to room temperature. The fire extinguishing agent has the effects of resisting high temperature and low temperature and keeping a long-acting and lasting fire extinguishing function.

The invention belongs to the field of automobile engine energy saving, and particularly relates to an engine energy saving device and method for producing hydrogen through ultrasonic water mist and mineral particles, the device comprises a special water storage tank, an ultrasonic water mist generator and micro hydrogen production mineral particles, and the special water storage tank is divided into an ultrasonic water mist generation chamber and a mineral particle hydrogen production chamber through a permeation partition plate; the ultrasonic water mist generator is placed at the position 3 mm-5 mm below the liquid level of the ultrasonic water mist generating chamber, and water is atomized through external power supply. Micro-hydrogen production mineral particles are placed at the bottom of the mineral particle hydrogen production chamber and react with water to generate hydrogen, part of hydrogen is dissolved in water, and part of hydrogen is stored in the gas storage chamber above the liquid level. An air outlet is formed in the top of the special water storage tank and connected with an engine air inlet pipe, water mist and hydrogen enter an air cylinder along with engine suction to participate in acting, and therefore the redundant fuel injection amount is eliminated, and heat transfer loss in the cylinder is reduced. The heat efficiency of the automobile engine is improved, knocking is restrained, the incomplete combustion phenomenon is reduced, and then fuel consumption and harmful gas emission are reduced.

The invention relates to the technical field of flue gas treatment, in particular to a carbon capture and storage system and a carbon capture and storage method.The carbon capture and storage system comprises a waste gas absorption unit, an amine liquid circulation unit, a carbon dioxide gas salinization unit and a carbon sequestration unit which are communicated in sequence; the system further comprises a limestone slurry pulping and filling unit; and the limestone slurry pulping and filling unit is communicated with the carbon dioxide gas salinization unit. The carbon capture and storage method is a brand-new organic amine decarburization and permanent carbon sequestration method provided on the basis of the principle of enhancing rock weathering; compared with a traditional carbon sequestration method that carbon dioxide is transported through compression and liquefaction and stored in an underground salt water layer, the method has the advantages that the carbon capturing and storing process is short, high-pressure and low-temperature high-energy-consumption equipment does not need to be used, the captured carbon dioxide gas does not need to be stored and transported at low temperature, energy consumption can be reduced, the carbon sequestration cost is saved, and the carbon sequestration efficiency is improved. The carbon dioxide escape phenomenon in the storage and transportation process can be avoided, and the carbon sequestration efficiency is improved.

The application provides a markable microcatheter for neurointerventional surgery, comprising: a main body tube having a distal end for going deep into the body of a patient and a proximal end opposite to the distal end, a catheter channel being arranged in the main body tube, the hardness of the main body tube being gradually increased in the direction from the distal end to the proximal end; the at least six developing parts are uniformly arranged in the axial direction of the far end of the main body tube along a preset mapping distance, and the preset mapping distance is 4-6 mm; through the at least six developing parts, the main body tube is developed when entering the tumor opening position of the aneurysm cavity so as to map the width of the tumor opening. The problem that in the prior art, a micro catheter cannot map the width of a tumor opening is solved. Meanwhile, the device can also be used for measuring the lengths of narrow and closed sections during thrombolysis and thrombectomy, and accurate selection of thrombectomy stents and narrow stents is facilitated.

The invention provides an optical element surface particle detection and cleaning device, which comprises a low-vacuum laminar flow environment module, a particle detection module, a particle cleaning module and a displacement table module, and is characterized in that the low-vacuum laminar flow environment module comprises a working chamber and a laminar flow low-vacuum control unit; the particle detection module comprises a first collecting lens, a second collecting lens, a laser emission assembly and a laser feedback detection assembly; the first collecting lens, the second collecting lens and the laser feedback detection assembly are respectively arranged in the working chamber; the particle cleaning module comprises a pulse laser emitting assembly, a beam expander and a convergent lens, and the beam expander and the convergent lens are arranged in the working chamber; and the displacement table module is arranged in the working chamber and is used for bearing the optical element to move in the working chamber so as to realize detection and cleaning of particulate matters on the optical element. According to the invention, in-situ detection and cleaning of the optical element can be realized in the semiconductor equipment, and the problem of secondary pollution after cleaning can be avoided.

The utility model discloses a food calling and screening device for pomacea canaliculata. The food calling and screening device comprises a canaliculata containing box and a plurality of trapping units. The trapping unit is communicated with the snail containing box through a connecting pipe. The trapping unit comprises a trapping box and a bait box used for containing food calling materials. According to the utility model, the snail containing box and the trapping boxes communicated with the snail containing box through the connecting pipes are arranged; by replacing the food calling materials contained in the trapping box, an experimenter can more visually observe the attraction degree of different food calling materials to the ampullaria gigas. Meanwhile, the upper half edge of the trapping inlet of the trapping box and the air supply outlet are sealed with gauze, so that the ampullaria gigas can be effectively prevented from escaping after entering the trapping box, and the accuracy of experiments is ensured.

The invention discloses a preparation method and application of a flame-retardant coating, and relates to the technical field of flame-retardant coatings for special papers.The flame-retardant coating is prepared from, by weight, 80-85 parts of flame-retardant pigment and 15-20 parts of heat insulation pigment; the total weight of the components is set as M, the adhesive accounts for 8-15% M, the co-adhesive accounts for 7-9% M, the thickening agent accounts for 1-2% M, the lubricant accounts for 0.6-1% M, the water repellent agent accounts for 0.5-0.8% M, the defoaming agent accounts for 0.1-0.2% M, and the dispersing agent accounts for 0.2-0.3% M. The flame-retardant coating is designed and prepared, and the tipping base paper which can be carbonized at high temperature and does not burn is prepared by coating the surface of the tipping base paper. The preparation method is simple in process and high in operability, the defects of a direct papermaking method and an in-pulp addition method are overcome, the production efficiency and the resource utilization rate are improved, and the production cost is reduced. The flame-retardant tipping base paper is prepared by a coating method instead of a traditional in-pulp addition method, and a functional coating is selected and designed, so that the coating process flow and parameters are determined. The flame-retardant coating prepared by the invention endows tipping base paper with excellent high-temperature carbonization and non-combustion performance, and the flame safety performance of the tipping base paper is effectively improved.

The utility model discloses a thrombus catching device which comprises a thrombus extraction support, a blocking support and identification blocks, the thrombus extraction support and the blocking support are respectively of a self-expansion and expansion structure, the identification blocks are respectively arranged at the far end and the near end of the thrombus extraction support and a catching middle section, and the identification blocks are respectively identified at the front end and the rear end of the catching middle section. The middle capturing section is an effective working section for capturing thrombus after the thrombus extraction stent is released and unfolded; the far end of the thrombectomy support is of an open structure after being expanded and unfolded, the blocking support is arranged at the opening of the far end of the thrombectomy support in a matched mode, and the blocking support is in a net bag face shape after being unfolded, is located in the unfolded thrombectomy support and forms a blocking face. According to the thrombus extraction support, the problem that broken thrombus escapes in the thrombus extraction process of the thrombus extraction support is better solved, the broken thrombus is prevented from blocking far-end blood vessels, the thrombus is more thoroughly captured and removed, and the treatment effect of mechanical thrombus extraction is improved.

The invention relates to the technical field of new materials, and discloses an amino-terminated phosphorus-containing starch modified polyethylene flame-retardant composite material which is prepared by using polyethylene grafted phosphorus-containing starch as a modifier, carrying out blending modification on high-density polyethylene and using a polyethylene molecular chain introduced by a phosphorus-containing starch side chain as a compatilizer. The polyethylene grafted phosphorus-containing starch and the high-density polyethylene have good interfacial compatibility, the influence on the mechanical tensile strength and other mechanical properties of the high-density polyethylene is avoided, meanwhile, the starch is used as an expansion carbon source, and the side chain grafted phosphaphenanthrene derivative is used as a phosphorus-containing flame retardant, so that the phosphorus-containing flame-retardant polyethylene is prepared. The high-density polyethylene prepared by the preparation method has the advantages that the high-density polyethylene is used as a raw material, phosphoric acid compounds and phosphorus-oxygen free radicals are generated by thermal decomposition during combustion, and the phosphoric acid compounds are high in water absorption, so that the starch can be dehydrated and carbonized, a continuous and stable carbon barrier layer is formed in the high-density polyethylene, and smoke escape can be inhibited, molten drops can be prevented, and oxygen and heat insulation effects can be achieved.

The utility model relates to the technical field of live pig transportation, in particular to a live pig slaughtering fixing device, which is characterized in that a mounting frame and an iron frame which are fixedly connected are arranged on a bottom plate, a side plate is arranged on the mounting frame, a plurality of fixing plate components are arranged on the iron frame, and the plurality of fixing plate components are clamped with the side plate. The live pig fixing device has the advantages that the elastic plate is arranged on the iron frame in an up-down sliding mode through the limiting sliding sleeves, the elastic plate is an elastic metal elastic plate so that live pigs of different body types can be fixed through the elastic plate, the limiting sliding sleeves arranged at the two ends of the elastic plate are connected with the ratchet plate in a clamped mode through the tooth grooves, and upward movement of the elastic plate is limited; looseness of fixation of the live pigs in the transportation process is avoided.

The utility model discloses a mosquito larva feeding and observing device, and relates to the technical field of mosquito larva feeding and observing devices. The device comprises a feeding box, a cone is movably clamped to the top of the feeding box, a locking mechanism used for limiting the cone is arranged on the surface of the feeding box, a flying hole is formed in the top end of the cone in a penetrating mode, and a net cover is connected to the surface of the cone in a sleeved mode. A butt joint assembly used for limiting the mesh enclosure is arranged on the surface of the cone, a positioning ring is movably connected to the bottom of the feeding box in a clamped mode, a supporting plate is arranged below the positioning ring, and a height adjusting assembly used for controlling the positioning ring to move up and down is arranged on the surface of the fixing frame. The device is simple in structure and convenient to use, the effect of conveniently hatching and observing mosquito larvae is achieved in the using process, water and adult mosquitoes can be effectively separated, the situation that the adult mosquitoes die is avoided, in addition, disassembly and assembly are more convenient, feed adding is more convenient, and the situations of splashing and adult mosquito escaping are avoided.

The invention discloses a quick-drying waterborne epoxy coating and a preparation method thereof, and relates to the field of coatings. When the quick-drying waterborne epoxy coating is prepared, modified cyclotetrasiloxane, 3-aminopropyl methyl dimethoxy silane and quaternized silane are subjected to a reaction, and functional polysiloxane is prepared; the preparation method comprises the following steps: reacting graphene oxide with ethylenediamine and allyl phosphine dichloride to prepare modified graphene; the preparation method comprises the following steps: preparing a component A from modified graphene, functionalized polysiloxane, a defoaming agent, azodiisobutyronitrile and deionized water, taking waterborne epoxy emulsion as a component B, and uniformly mixing the component A and the component B to prepare the quick-drying waterborne epoxy coating. The quick-drying waterborne epoxy coating prepared by the invention has good corrosion resistance, self-repairing performance, flame retardance, antibacterial performance and wear resistance.

This utility model provides an insect branch-fixing survey and rearing observation box, relating to the technical field of insect observation devices, and is designed to solve the problem of easy damage to branches in existing insect survey techniques. The insect branch-fixing survey and rearing observation box includes a first half-box and a second half-box. The first half-box has a first upper half-hole and a first lower half-hole, and the second half-box has a second upper half-hole and a second lower half-hole. The first and second half-boxes are joined to form a receiving cavity. When the first and second half-boxes are joined, the first and second upper half-holes together form a first hole for the branch to pass through, and the first and second lower half-holes together form a second hole for the branch to pass through. The first and second holes are respectively sealed to the branch at different locations. Both the first and second half-boxes are made of transparent material, and at least one of the first and second half-boxes has a ventilation window with a detachable mesh screen. This utility model is less likely to damage branches.

The utility model discloses a fruit and vegetable juice extracting device, which relates to the technical field of fruit and vegetable juice beverage production, and comprises a tank body, a fixed frame is arranged in the tank body, a sliding chute is arranged in the fixed frame, a limiting rod is arranged on the front surface of the sliding chute, a first mounting frame is arranged in the fixed frame, and a second mounting frame is arranged in the first mounting frame. A first mounting frame is arranged below the fixing frame, a second mounting frame is arranged below the first mounting frame, filter screens are mounted in the second mounting frame and the first mounting frame, sliding blocks are mounted outside the filter screens, limiting blocks are connected outside the sliding blocks, and a pressing plate is arranged above the fixing frame. According to the cleaning device, the tank body, the first mounting frame, the second mounting frame, the filter screen, the sliding grooves and the sliding blocks are arranged, the filter screen can be conveniently driven to move by operating the first mounting frame and the second mounting frame in turn, so that the filter screen can be cleaned without shutdown, and the situation that fruit and vegetable meat scraps are easily clamped in filter screen holes to affect the conveying efficiency of fruit and vegetable juice is avoided; and the practicability is high.

The invention discloses a foldable mesh cage type ampullaria gigas trapping device and a trapping method, and relates to the technical field of biological control. Comprising a folding net cage main body, a snail collecting cage arranged on the folding net cage main body and communicated with the interior of the folding net cage main body, a food calling bag arranged in the folding net cage main body in the length direction, a food calling agent contained in the food calling bag, a plurality of snail inlets formed in the folding net cage main body and guide assemblies arranged on the outer sides of the snail inlets. One end of the folding mesh cage body away from the conch collecting cage is closed; each pomacea canaliculata collecting cage is provided with a funnel-shaped inlet for collecting pomacea canaliculata and a closed net bag, and a phagostimulant is placed in the closed net bag; the portable folding chair is reasonable in design, has a foldable design and is convenient to carry and store. The net cage structure effectively traps the ampullaria gigas and prevents the ampullaria gigas from escaping, and meanwhile a phagostimulant can be placed to attract the ampullaria gigas to enter the net cage. The device is suitable for rice fields and other aquatic environments, is easy to install and can be repeatedly used, and pollution to the environment is greatly reduced.

The invention provides a carbon-based pumice stone and a preparation method thereof, and belongs to the technical field of new material preparation in water treatment. The base material and / or the silica-alumina ratio blending agent are / is used as the main material, the foaming agent and the foaming promoter generate a large number of bubbles during foaming, and a large number of open pores and gaps are formed in the material, so that the effective porosity is improved; a gas-retaining agent is adopted to wrap the material, so that generated bubbles are prevented from quickly escaping, and the effective porosity is further improved; cO generated by organic carbon and biochar is deoxidized into pure elemental carbon molecules by sintering under a sealed condition, and meanwhile, a honeycomb-shaped pipeline bundle structure consisting of carbon molecules is formed by self-assembly in a pre-manufactured gap, so that the adsorbent has excellent adsorbability and liquidity; by adopting sludge or organic sludge and a small amount of auxiliary carbon sources, a structure which takes silicon oxide as a main body and contains honeycomb-shaped carbon molecule pipeline bundles connected with a large number of air holes is obtained, the performance of the material is greatly improved, meanwhile, the use of a large number of wood materials is reduced, and the cost of raw materials is saved.

The invention discloses a filament wire drawing machine for cable manufacturing, which comprises a rack, an unwinding mechanism, a winding mechanism, a tension adjusting mechanism, a heating wire drawing mechanism, a cooling shaping mechanism and a wire leading rod, the left side of the rack is rotatably provided with the unwinding mechanism, and the right side of the rack is rotatably provided with the winding mechanism; tension adjusting mechanisms are installed on the left side and the right side of the rack, the two tension adjusting mechanisms are both arranged between the unwinding mechanism and the winding mechanism, a thread guiding rod, a first sliding groove and a steel wire rope are arranged, the thread guiding rod is installed in the first sliding groove in a sliding mode through a movable head, one section of polyester filament yarn can be bound to the thread guiding rod, and the other section of polyester filament yarn can be bound to the steel wire rope. And then the driving motors pull the thread guide rods to slide in the first sliding grooves through the steel wire ropes, so that the thread guide rods rapidly move to the winding mechanism from the unwinding mechanism, in the same way, the two driving motors and the steel wire ropes arranged correspondingly facilitate rapid control of the positions of the thread guide rods, the traction process of polyester filaments is greatly simplified, and use is more convenient.

The present application relates to fibers of one or more biocompatible polymers having a diameter of 1 nm to 10,000 nm, wherein the polymer has a main chain including a positively charged component from a zwitterionic portion. In addition, the present application discloses an implantable therapeutic delivery system and a method for forming the same, the implantable therapeutic delivery system comprising a shell defining a chamber, wherein the shell is porous and is formed by the fibers. The interior of the shell includes a cell preparation that releases a therapeutic agent from the chamber. The implantable therapeutic delivery system can be used to treat diabetes.

The invention discloses a method for reinforcing denitrification of a sulfur circulation microbial system by using an iron carrier, and belongs to the technical field of nitrogen-containing wastewater treatment. The method comprises the following steps: inoculating sulfate reducing bacteria and thiobacillus denitrificans into a culture medium containing iron ions or ferrous ions for domestication; and applying the domesticated complex microbial inoculant to wastewater denitrification. In a sulfur circulating microorganism system, Fe < 2 + > can promote the activity of a biological denitrification key enzyme in a biological system by forming an iron carrier in a form of FeS, S < 2-> is fixed in the system and prevented from escaping, and when electron donors in the system are insufficient, the Fe < 2 + > can be used as a substitute electron donor for biological denitrification, so that the requirement on an external carbon source is reduced, and the energy consumption is reduced. And meanwhile, the impact load resistance of the system can be enhanced. Through sulfate reduction and sulfur autotrophic denitrification and iron coupling, sulfate in wastewater is converted into electron donors, a carbon-nitrogen-sulfur-iron biological co-reaction system is formed, the defects of a single-strain denitrification system are overcome, the denitrification effect is enhanced, and energy consumption and cost are reduced.

The utility model relates to a blast furnace main iron runner cover which comprises a cover body composed of a shell and a refractory lining, the cover body is arched, a plurality of air holes are formed in the cover body, flaring sections are arranged at the two ends of the cover body, an outer retaining wall and an inner retaining wall are arranged at the two ends in the cover body along the inner wall respectively, the outer retaining wall and the inner retaining wall are arranged at intervals, and the outer retaining wall and the inner retaining wall are the same in structure. Comprising a metal wall plate, the metal wall plate is fixedly connected with a shell, a refractory material layer covers the metal wall plate, the refractory material layer and a refractory material lining form an integrated structure, and an arch-shaped channel is formed in the middle of an outer retaining wall and the middle of an inner retaining wall. The trumpet-shaped flaring can enlarge the coverage area and the shielding area, prevent air convection interference and dust escape, prevent particles entering the main iron runner cover from scattering, and improve the slag iron splashing and sucking effect. The outer retaining wall and the inner retaining wall can forcibly control the spraying speed of molten slag and iron, and kinetic energy and impact force are reduced.