56results about How to "Achieve stripping" patented technology

The invention discloses an automatic clearing mechanism for hemming scraped objects of a firer detonator. The automatic clearing mechanism comprises a hemming module, a redundant object clearing module and an upper table top, the hemming module is fixed on the front surface of the upper table top and is used for realizing hemming operation on a product; the redundant material cleaning module is fixed to the back face of the upper table top and used for cleaning redundant materials. According to the mechanism for automatically removing the scraped objects on the hemming edges of the firer detonators, the metal scraped objects can be effectively, continuously and stably removed automatically, a foundation is laid for automatic hemming of products such as the firer detonators, and the problem that the scraped objects are prone to being generated on a hemming tool and cannot be hemmed continuously and automatically during hemming of soft materials is solved.

The invention discloses a cladding light stripper, a manufacturing method thereof and an optical fiber laser, and relates to the technical field of cladding light strippers, the cladding light stripper comprises a double-cladding optical fiber assembly and a three-cladding bare fiber, the double-cladding optical fiber assembly comprises two sections of double-cladding optical fibers, each double-cladding optical fiber comprises a double-cladding bare fiber and a coating layer which are sequentially arranged from inside to outside in a sleeved mode, and the three-cladding bare fiber is arranged between the double-cladding bare fiber and the coating layer. The double-cladding bare fiber extends out of the coating layer; the number of the three-cladding bare fibers is multiple sections, the multiple sections of three-cladding bare fibers are sequentially welded to form a main body, the two sections of double-cladding optical fibers are welded to the two ends of the main body through the double-cladding bare fibers respectively, and a stripper is formed on the main body. According to the cladding light stripper, on the premise that the original advantages of a double-cladding optical fiber and a three-cladding bare fiber are kept, multiple sections of three-cladding bare fibers are adopted to manufacture the stripper, so that the situation that a certain section of three-cladding bare fiber bears high power for a long time to generate local hot spots can be prevented, and the cladding light stripping capacity of the cladding light stripper is greatly improved.

The utility model discloses an anti-sticking quick demoulding mechanism of an injection mould, and relates to the technical field of safety helmet production, the anti-sticking quick demoulding mechanism comprises a static mould base and a quick demoulding assembly, the quick demoulding assembly is arranged in the static mould base, and the quick demoulding assembly comprises an air cavity, a high-pressure air pump, an ejector pin bottom plate, an ejector rod, a demoulding ejector pin, an air blocking pipe and a spring. When the anti-sticking quick demolding mechanism for the injection mold is used, a positioning ring at the top of a movable mold base is used for being connected with an extrusion mold head, molten plastic enters a branch runner through a sprue and finally enters a corresponding double-station injection molding cavity, and the double-station injection molding cavity corresponds to forming male molds on the two sides of a static mold base; batch injection molding production of multiple safety helmets can be achieved at the same time, the operation efficiency is improved, in addition, the guide sleeve at one end of the movable mold base is in positioning fit with the guide column at one end of the static mold base, the mold closing stroke of the movable mold base and the static mold base is limited and guided, and product forming failure caused by mold cavity dislocation is prevented.

The invention discloses an SIC crystal growth raw material production device, and relates to the technical field of silicon carbide crystal growth. The device comprises an outer machine cover, a screening frame is slidably connected to the interior of the outer machine cover, a screening cam is rotatably installed in the outer machine cover and driven by a motor, a screening spring is arranged between the screening frame and the outer machine cover, and an upper screening net and a lower screening net are arranged in the screening frame; a top frame is arranged on the top of the outer machine cover. The cam and the screening spring drive the screening frame to slide left and right, the screening frame drives the upper screening net and the lower screening net to slide left and right, the upper screening net slides left and right relative to the upper stripping plate, large crystals and purification materials can be stripped, the lower screening net slides left and right relative to the lower stripping plate, small crystals and the purification materials can be stripped, and heating is not needed; and the crystal can be quickly stripped from the purification material by utilizing twisting force generated by mutual dislocation of the screening net and the stripping plate.

The invention discloses an efficient sorting method for recycled concrete aggregate, an aggregate sorting device is adopted, the aggregate sorting device comprises a first-stage screening mechanism, a second-stage screening mechanism and a third-stage screening mechanism, and the treatment process comprises the steps that to-be-treated materials are screened through the first-stage screening mechanism of the aggregate sorting device; oversize products screened out by the first-stage screening mechanism are screened through a second-stage screening mechanism; and the oversize product screened out by the second-stage screening mechanism is screened out by the third-stage screening mechanism, so that coarse aggregate and fine aggregate are screened out. The coarse aggregate and the fine aggregate are accurately separated in the concrete regeneration process, and the mix proportion of the regenerated concrete is accurate.

The present invention relates to a thin film material and a preparation method and application thereof, belonging to the technical field of thin film material preparation. The preparation method of the thin film material comprises dispersing a redox-active nano material, adding a reducing agent or a silane coupling agent, heating at 35-50°C and stirring the reaction to obtain a modified film layer liquid; mixing powder particles with a dispersant to obtain a filtrate; placing a hydrophilic bottom membrane in a filtration device, pouring the modified film layer liquid into the filtration device, and forming a modified film layer on the bottom membrane after filtration; then pouring the filtrate into the filtration device, drying, and obtaining a composite film layer, wherein the composite film layer is a bottom membrane, a modified film layer and a filtration membrane in sequence; laminating the filtration membrane on a substrate material, and then dripping water on the side of the substrate membrane away from the modified film layer to obtain a thin film material composed of the substrate material and the filtration membrane, thereby obtaining a thin film material with a complete structure and high performance.

The present application relates to a kind of electromagnetic ultrasonic-based underwater steel structure damage detection and distinguishing method, using electromagnetic ultrasonic detection equipment to detect underwater steel structure with non-conductive covering layer on surface.The method comprises: electromagnetic acoustic transducer (EMAT) probe is arranged above the surface of underwater steel structure;According to lift-off distance, configure excitation parameter;Apply excitation pulse to emit ultrasonic wave;Receive echo signal and extract transit time feature, echo amplitude feature and initial wave amplitude feature;At least one change based on the above features distinguishes abnormal type, the abnormal type includes at least one of corrosion thinning, surface opening crack and simple lift-off increase.By the above design, the present application realizes the accurate detection and reliable distinction of underwater steel structure damage state under the condition of non-conductive covering layer.

The invention relates to a pole piece stripping device which is used for stripping an active material on the surface of a current collector, the pole piece stripping device comprises a rack, a conveying mechanism, a recovery tank and a spraying mechanism, the conveying mechanism is arranged on the rack, the conveying mechanism comprises a first mounting assembly, a second mounting assembly, a first grid belt and a second grid belt, the first grid belt is wound on the outer side of the first mounting assembly, the second grid belt is wound on the outer side of the second mounting assembly, at least parts of the first grid belt and the second grid belt are oppositely arranged, and the first grid belt and the second grid belt are matched and used for clamping a pole piece; a first fluid is arranged in the recovery tank, the first grid belt and the second grid belt are at least partially immersed in the first fluid, and the first fluid is used for heating the pole piece; the spraying mechanism is arranged on the rack and used for spraying second fluid towards the pole piece.

The application belongs to the technical field of metal surface treatment, and particularly relates to an alkaline cleaning solution, a preparation method thereof, a formula optimization method and an alkaline cleaning method. Embodiments of the application abandon the formula system of high alkalinity and high phosphate in the prior art, and adopt a moderate alkalinity saponification degreasing-sodium gluconate chelation corrosion inhibition-trace amount of trisodium phosphate auxiliary-degreasing agent solubilization as a synergistic design idea to construct an alkaline cleaning solution formula which is suitable for the component characteristics of iron-chromium-aluminum alloy wire and the quality requirements of blue finished products. The formula enhances the wetting penetration and emulsification dispersion capacity by adding 4% to 10% of sodium hydroxide, 0.5% to 2.0% of sodium gluconate, 0.1% to 2% of trisodium phosphate and 0.1% to 2.0% of degreasing agent. The four components form a complete degreasing-corrosion inhibition synergistic system in the solvent system of water, and the dilemma of black spots due to incomplete degreasing and aluminum deficiency due to excessive degreasing in the alkaline cleaning process of iron-chromium-aluminum alloy wire blue finished products is solved.

The invention discloses a precise gear hobbing machine, and belongs to the technical field of gear hobbing machines. The machine tool mainly comprises a machine tool body, a rotating table arranged on a base of the machine tool body, a gear hobbing assembly used for workpiece gear cutting, a tailstock assembly provided with a tailstock center supporting workpiece and an air blowing assembly installed on the tailstock center. An air blowing unit of the air blowing assembly is provided with a horizontal air pipe and inclined air pipes arranged on the two sides of the horizontal air pipe. According to the precise gear hobbing machine, the two inclined air pipes are driven to be close to or far away from each other through the lead screw transmission mechanism of the adjusting unit, so that the horizontal interval of air injection is adjusted, and meanwhile, the inclined air pipes are forcibly driven to synchronously rotate to change the inclination angle when the interval is adjusted through the gear and rack follow-up mechanism; and the impact angle of the blown air flow is mechanically matched with the tooth direction pressure angles of workpieces with different large modulus in real time, so that wall-hanging scraps in a deep tooth groove are effectively stripped and are finally collected by the arc-shaped scrap receiving disc, and the scrap removal efficiency and the machining quality are improved.

The present invention relates to the technical field of rapeseed peeling machines, and discloses a rapeseed rapid peeling machine for agricultural production and processing, comprising a processing box, and further comprising: a feeding bin connected to the bottom of the processing box for feeding the peeled rapeseed; a collecting trough connected to the bottom of the feeding bin for collecting the peeled rapeseed; and a peeling mechanism arranged inside the processing box for rotating and striking to separate the rapeseed. The present invention realizes rapid peeling of rapeseed by the provided peeling mechanism. During peeling, the staggered peeling rods 1 and 2 rotate at high speed to rotate and strike the rapeseed stalks, separate the rapeseed from the rapeseed stalks, and crush the rapeseed stalks to realize rapid separation of the rapeseed, avoiding the problem of low efficiency of manual peeling, thereby solving the problems raised in the background technology, improving work efficiency, reducing manual labor intensity, and avoiding the situation where the rapeseed is broken, which affects the quality of the rapeseed.

The invention discloses a foam particle conveying device for foam production, and particularly relates to the technical field of foam particle pretreatment, the foam particle conveying device comprises a frame, a horizontal electromagnet, a screening separation piece, an inclined electromagnet and a driving module, and the horizontal electromagnet is mounted above the frame; the screening and separating piece is installed on the upper inclined face of the horizontal electromagnet, and an inclined electromagnet is installed on the screening and separating piece. The driving module is installed at one end of the horizontal electromagnet. The device has the advantages that metal impurities adsorbed on the electromagnets are synchronously and rapidly stripped, long-time shutdown caused by one-by-one maintenance is avoided, the maintenance time is remarkably shortened, and the pretreatment efficiency of foam particle conveying and recycling is improved, so that the problem that the metal impurities in all the fully-adsorbed positions are difficult to synchronously and rapidly reach the appointed stripping and removing positions, and the production efficiency is improved is solved. And the pretreatment efficiency of foam particle production and recovery is reduced.

The present invention discloses a method, system, device and medium for accessing advanced algorithms of a distributed control system. The method comprises the following steps: setting a data area, and dividing the data area into an algorithm data area, a system data area and an interface data area for storing interactive data of advanced algorithms, a DCS system and a human-machine interface; acquiring the interactive data of the advanced algorithms, the DCS system and the human-machine interface, and storing them in the algorithm data area, the system data area and the interface data area respectively; converting the interactive data in the algorithm data area, the system data area and the interface data area into an algorithm data table, a system data table and an interface data table with a mapping relationship based on a preset basic data table; and realizing data interaction between the advanced algorithms, the DCS system and the human-machine interface based on the algorithm data table, the system data table and the interface data table. The present invention can meet the demand for accessing advanced algorithms.

The invention relates to the technical field of adhesives, in particular to pyrolysis viscose water, a preparation method and application of the pyrolysis viscose water in electrolytic film cutting. The pyrolytic viscose water comprises the following components in parts by weight: 90-95 parts of modified polyacrylic resin, 15-35 parts of tackifying resin, 1-3 parts of a curing agent and 80-85 parts of a solvent. The invention also provides a preparation method of the composition. Compared with the prior art, the pyrolytic viscose glue prepared by the invention has the advantages of better thermal stability, no residual glue and the like, and is suitable for being applied to electrolytic film cutting parts.

The utility model relates to a kind of wet method mixed granulator, belong to granule mixing technical field, including granule mixing box and the inner box of fixedly connected to granule mixing box inner bottom wall, the inside of granule mixing box is equipped with the mixing assembly for granule mixing, the mixing assembly includes the fixed plate of fixedly connected to granule mixing box inner rear wall, the bottom of fixed plate is fixedly connected with motor box, the inside of motor box is fixedly connected with drive motor, the output shaft of drive motor is fixedly connected with connecting rod, the bottom end of connecting rod is fixedly connected with mounting frame body.This wet method mixed granulator, by mixing assembly generates forced convection and high shear field, make material realize uniform mixing in three-dimensional space, and by arranging ultrasonic transducer in four directions, utilize coupling layer to efficiently conduct vibration energy to inner box wall surface, utilize the microjet and wall high-frequency microvibration generated by ultrasonic cavitation effect, realize the peeling of adhering object, avoid resource waste.

The utility model relates to the technical field of battery packs, and discloses a CTP battery pack disassembling puller device, a CTP battery pack comprises a shell of which a top cover is separated in advance, a battery cell which is arranged in the shell and is adhered with the shell through an adhesive, a base and a storage table which is arranged on the base, a jacking assembly is embedded in the upper surface of the storage table and comprises a telescopic rod capable of stretching out and drawing back in the vertical direction. Two hook assemblies are installed on the storage table, and each hook assembly comprises a hook part capable of moving up and down. According to the puller device for disassembling the CTP battery pack, the purpose of disassembling the CTP battery pack at normal temperature can be achieved, the purpose that the appearance of a battery cell is intact and does not deform after the CTP battery pack is disassembled can be achieved, and the purpose that the battery cell is integrally stripped from a shell at a time can be achieved.

The application discloses a device and method for microneedle patch injection and peeling, and relates to the technical field of microneedle patch application devices, which comprises a shell, a sliding groove is arranged on the side wall of the shell; an injection mechanism is arranged in the shell and comprises a hollow spring push rod, a spring guide rod is arranged on the top of the spring push rod, the spring guide rod is fixed on the top of the shell, and the spring guide rod is sleeved with a spring on the side of the top of the spring push rod; a clamping mechanism is fixed on the bottom of the spring push rod and comprises a sliding rail, a pair of clamping blocks are symmetrically arranged on the sliding rail, the clamping blocks are connected with an adjusting mechanism to realize the approaching or moving away of the clamping blocks, the sliding rail penetrates through the sliding groove and is connected with a pusher, the clamping mechanism is compressed and locked through the pusher, the pusher is released, and the microneedle patch in the clamping block is pushed through the action of the spring; the device can uniformly penetrate the drug-loaded tip of the microneedle patch into the skin through external force and peel the microneedle patch or the base of the microneedle patch from the surface of the skin.

The invention discloses a three-dimensional ultrasonic body data processing method and device, equipment and a medium, and relates to the field of ultrasonic images, and the method comprises the steps: determining a surface region of a shielded target in three-dimensional ultrasonic body data; performing three-dimensional curved surface fitting based on the coordinate points on the surface area to obtain a fitted curved surface; and cutting off ultrasonic body data located on the outer side of the fitting curved surface in the three-dimensional ultrasonic body data to obtain cut ultrasonic body data corresponding to the shielded target. It can be seen that the coordinate points on the surface area are fitted to obtain the fitting curved surface, and the ultrasonic body data, located on the outer side of the fitting curved surface, in the three-dimensional ultrasonic body data are cut off, so that sheltered tissues around the sheltered target can be stripped, and the correct sheltered target can be displayed.

The application discloses a water-based coating remover for aviation composite paint, which comprises the following components in percentage by mass: paint removal composition 10-25%, surfactant 1-6%, chelating agent 1-5%, corrosion inhibitor 1-5%, stabilizer 0.1-1%, and water; the paint removal composition comprises a paint removal degradation component and a penetrating agent, and the paint removal degradation component is selected from sodium hydroxide and monoethanolamine at a mass ratio of 1:1-1:2. The water-based coating remover for aviation composite paint is environmentally friendly, has low corrosion, is suitable for ultrasonic removal working conditions, has excellent chemical and physical stability in a severe cavitation environment, can remove high-performance organic-inorganic composite paint coatings attached to the surfaces of key components such as high-pressure turbine discs, low-pressure turbine discs and sealing rings, ensures that the paint removal process is continuous and efficient and does not cause damage to expensive base materials, and is suitable for the maintenance and removal of coatings of high-temperature components such as aircraft engines.

The application relates to a method for preparing fluorinated graphene, and belongs to the graphene material field. The preparation method comprises the following steps: mixing and dispersing waste lithium battery recovery graphite powder, an intercalation agent and a dispersing agent in water to form a slurry, keeping the slurry at 40-60 DEG C for 4-8 hours, then spraying the slurry through a high-pressure device to form high-speed jets, and realizing graphite layer peeling through the cross impact of multiple jet beams, then adding a fluorination agent, keeping the slurry at 150-200 DEG C for 6-12 hours, centrifugally separating upper clear liquid, filtering and washing, vacuum drying, and obtaining fluorinated graphene. The application realizes graphite layer peeling through liquid cross impact, has high production efficiency, the obtained graphene sheet layer is regular and neat, has few structural defects, and the performance of the graphene is improved; the peeling strength can be adjusted by adjusting the jet speed, different layer number graphene products can be obtained, and the production is continuous, and the efficiency is relatively high; the raw material is waste lithium battery recovery graphite, the cost is low, the obtained graphene contains oxygen-containing functional groups, and has good water solubility.

The invention is applicable to the technical field of optical fiber processing, and provides a fiber stripping device with a cleaning function, which comprises a liquid scrap recovery box, a left tool bit assembly fixed in the liquid scrap recovery box, a driving cylinder mounted on the liquid scrap recovery box, a right tool bit assembly arranged on an output shaft of the driving cylinder and located in the liquid scrap recovery box, and the two tool bit assemblies are oppositely arranged. Each tool bit assembly comprises a seat body, a sinking groove is formed in the front end of each seat body, a tool bit module is locked in each sinking groove, at least one seat body is provided with a gas connector and an alcohol pumping connector, and the gas connectors and the alcohol pumping connectors are communicated to the corresponding tool bit modules through internal channels. According to the device, alcohol is sprayed to the knife edge position of the knife head module under the action of gas, a stripping surface can be cleaned while a coating layer is stripped, stripping chips are flushed into a liquid chip recovery box, and the surface of an optical fiber is wetted by the alcohol, so that the stripping process is smoother. And the coating layer is stripped in a reciprocating motion mode, and compared with an optical fiber rotating stripping mode, the effect is better.

The present application relates to the technical field of sludge treatment and disposal in river and lake water ecological management, and specifically discloses a self-adaptive sludge pollutant separation device and method, which comprises: a high-pollution slurry input pipe, provided with a test area and a shunt partition; an ultrasonic wave generating container, connected with the test area through a high-pollution slurry test area discharge introduction pipe, and provided with a test area bidirectional pump on the high-pollution slurry test area discharge introduction pipe; and a tail water discharge pipe, provided with a float and a tail water discharge pump, and the float is located at the head of the tail water discharge pipe. The present application uses the shunt partition to guide a small part of the high-pollution slurry into the test area and most of the high-pollution slurry into the ultrasonic wave generating container, determines the most suitable ultrasonic vibration frequency in the test area, and transmits the frequency to the ultrasonic wave generating container to ultrasonically vibrate the high-pollution slurry, so that the pollutants in the sludge are separated from the soil particles to the greatest extent, and compared with the traditional treatment method, the present application can prevent the overflow of pollutants in the sludge recycling process to cause "secondary pollution".

The invention provides a green and simple cellulose nanofiber preparation method based on enzyme pretreatment and a high-pressure homogenization technology, belongs to the technical field of nano material preparation, and aims to prepare high-quality cellulose nanofibers with controllable average size from agricultural wastes such as buckwheat hulls and the like. The difficulty and energy consumption of subsequent mechanical treatment are reduced by enzyme pretreatment, and meanwhile, the buckwheat hulls are used as a low-cost raw material, so that the production cost is remarkably reduced; by controlling the number of homogeneous cycles, the average size of the CNF can be flexibly adjusted, and the requirements of different application fields are met; the defects of a traditional preparation method are overcome, resource utilization of agricultural waste is promoted, and remarkable economic benefits and environmental protection value are achieved. The method has a wide prospect in promotion of CNF industrial application.

The invention belongs to the technical field of polyurethane cushions, and relates to a continuous production method of a polyurethane cushion, and the polyurethane cushion comprises a protective layer, a damping layer and an isolating layer which are arranged in sequence; the vibration reduction layer comprises a vibration reduction area and a filling area which are arranged at an interval; the continuous production method comprises the following steps that the isolating layer is flatly laid below the polyurethane pouring mechanism, and the protective layer is flatly laid above the isolating layer and is a certain distance away from the isolating layer; a polyurethane pouring mechanism pours a first polyurethane foaming material and a second polyurethane foaming material to the isolation layer at the same time, and after pouring, the materials start to be in contact with the protection layer and enter a heating drying tunnel together with the protection layer; after being heated by the heating drying tunnel, the material is cured to form the vibration reduction area and the filling area, the vibration reduction area and the filling area are compounded into an integrated vibration reduction layer, and the isolation layer, the protection layer and the vibration reduction layer are bonded and compounded into an integrated continuous composite polyurethane plate; and the continuous composite polyurethane plate is cut by a cutting device to form the polyurethane cushion pad.

The invention relates to the technical field of medical equipment, in particular to a full-automatic waste medical needle treatment device which comprises a treatment body, a fixing assembly used for clamping an injector is arranged at the top of the treatment body, a lifting sliding table ascending and descending in the vertical direction is arranged in the treatment body, and a hot pressing assembly and a needle winding assembly are integrated on the lifting sliding table; the hot pressing assembly is used for heating, softening and flattening a needle head, the needle winding assembly is used for winding the flattened needle head into a cluster, and a disinfection part and a stripping part are arranged on the needle winding assembly; the device further comprises a control device which is used for driving the lifting sliding table to ascend and descend and coordinating the heating flattening action of the hot-pressing assembly, the winding action of the winding needle assembly, the disinfection action of the synchronous disinfection part and the separation action of the stripping part. A clamping fixing and lifting integrated hot pressing and winding structure is adopted, and the processes of heating softening, flattening shaping, winding clustering, disinfection and stripping are combined, so that non-contact treatment of waste needles, effective killing of pathogenic microorganisms and collection of medical waste are achieved.

The present invention provides a controlled explosion dismantling charging structure and construction method for reinforced concrete secondary lining of a tunnel, characterized in that blasting sections are symmetrically arranged at the arch waist and side walls on both sides of the secondary lining, wherein 5 vertical sections are arranged at the arch waist, and the boreholes in each section are parallel and inclined upward; wherein 4 flat sections are arranged at the side walls, and the boreholes in each section are parallel and inclined toward the outside of the tunnel. A 3 cm thick concrete is left at the bottom of the borehole as a protective layer, and a discontinuous interval charging structure is used in the hole. The detonation sequence is to first detonate the arch waist blastholes on both sides, delay for half a second, and then detonate the side wall blastholes on both sides, and delay for 100ms for adjacent blastholes along the longitudinal direction of the tunnel. The principle is that the use of dense blastholes and interval charging structure can easily cause the concrete in the blasting area to fragment, and the concrete fragments are separated from the steel bars to form a weak area; the arch top secondary lining concrete in the non-explosion section overcomes the steel bar support force in the weak area of ​​the arch waist and falls, and drives the arch wall in the non-explosion section to deflect around the weak area of ​​the side wall until the second lining concrete falls to the ground. This method is suitable for the removal of reinforced concrete secondary lining of tunnels.

The present invention relates to a multi-level satellite platform digital modeling method based on Protobuffer, which first disassembles and combines the equipment model functions and characteristic types to be constructed to generate atomic component classification, then generates interface protocols and a model management system and a parameter management system based on the atomic components, and finally realizes component assembly and interaction between components based on the interface protocol. The present invention realizes the separation of parameters and components and the decoupling within the model by interfacing components and parameters, and also proposes a satellite platform digital simulation model development and assembly mode based on the interface, thereby realizing the unified management and rapid construction of the satellite platform digital simulation model.

The invention provides a magnetic hydrogel bead as well as a preparation method and application thereof in polycyclic aromatic hydrocarbon detection, a uniform layered NiFe2O4 (at) MXene (at) Cs (NMCs) adsorbent is prepared through a coprecipitation method, a micro-extraction technology based on the NMCs magnetic hydrogel bead is established, high selection of polycyclic aromatic hydrocarbon in a complex sample is realized mainly through physicochemical structure modification of chitosan and MXene, and the magnetic hydrogel bead is used for detecting polycyclic aromatic hydrocarbon. The density of adsorption sites is increased by adding new functional groups; meanwhile, the chitosan powder is modified into the hydrogel beads, so that high reaction sites are reserved, an intercalation effect is also achieved to realize stripping of the layered MXene material, a relatively large specific surface area is obtained, oxidation and agglomeration of MXene are reduced, adsorption selectivity of target analytes is improved, and a new detection idea is provided for detection of organic pollutants, particularly detection of five PAHs in food.

The invention belongs to the technical field of synthetic aperture radar measurement, and particularly relates to a road surface settlement early warning method and system based on a time sequence InSAR, and the method comprises the steps: obtaining a remote sensing image sequence and synchronous meteorological data of a monitoring region, generating a time sequence difference phase sequence and an air temperature difference value sequence of each candidate scattering point, calculating a relative phase temperature sensitivity coefficient between candidate scattering point pairs with a physical adjacent relationship, performing thermodynamic stripping on an original phase difference to obtain a corrected phase difference, constructing a space-time stability index in combination with a space physical distance, and taking the space-time stability index as a topological edge connection weight in an initial space topological graph to obtain a spatial topological graph; and determining an optimal connection path of phase unwrapping by executing a maximum spanning tree optimization algorithm and performing spatial deduction to obtain a real phase sequence after meteorological interference is stripped and calculate a settlement rate so as to trigger settlement early warning based on a judgment result. According to the invention, the capturing precision of the tiny settlement signal along the highway is improved.

The application relates to a scale preventing and peeling device for a cooling tower heat exchanger, which comprises a main pipe, a driving member and a spiral assembly. The spiral assembly is sleeved on the outer periphery of the main pipe, and a peeling member is arranged on the spiral assembly. One end of the peeling member is connected with the spiral assembly, and the other end extends towards the direction away from the spiral assembly and is used for abutting against the inner wall of the cooling tower heat exchanger. The outer periphery of the spiral assembly is provided with a flow guide groove which extends spirally around the axis of the spiral assembly. The driving member is connected with the main pipe, and the driving member can drive the spiral assembly to vibrate through the main pipe, so that the one end of the peeling member away from the spiral assembly rubs against the inner wall of the cooling tower heat exchanger. The scale preventing and peeling device provided by the application can not only prevent scale formation of the cooling tower heat exchanger but also remove the scale of the cooling tower heat exchanger, so as to be beneficial to guaranteeing the working efficiency of the cooling tower heat exchanger.