28results about How to "Improve long-term effect" patented technology

The invention relates to the technical field of biological fireproof forests, and discloses a design method for a biological fireproof barrier forest belt, which comprises the following steps of: 1, designing a biological fireproof forest belt based on the canopy density of 0.2-0.5 of a broadleaf mixed forest by taking the existing forest stand type as the broadleaf mixed forest, screening suitable fireproof tree species by integrating site conditions, natural environment and hydrothermal conditions of the biological fireproof forest belt of the broadleaf mixed forest; 2, cleaning and soil preparation are conducted on a biological fireproof forest belt to form a hole belt-shaped area, comprehensive complementary planting is conducted on fireproof tree species, the complementary planting density of a broad-leaf mixed forest is 2520 plants per kilometer as tree planting points, the fireproof tree species are planted in the hole belt-shaped area through the tree planting points, and the fireproof tree species are planted in the hole belt-shaped area; after planting, a compound fertilizer is used for topdressing, so that the fireproof tree seeds absorb fertility to accelerate the growth speed.

This invention discloses a crane safety operation control system and method based on machine vision and energy optimization management, belonging to the field of crane safety operation technology. Based on visual acquisition, this invention performs pre-operation benchmark calibration and dynamic data capture during operation, achieving full-cycle data traceability and synchronization based on timestamps. This clarifies the safety boundaries of the operation area and the initial state of the equipment, avoiding deviations and lags caused by data asynchrony, and ensuring the overall process is consistent and reliable. Visual data preprocessing eliminates external interference, and precise feature data is output using a safety benchmark model. Coupled with a tiered early warning mechanism, it accurately predicts operational anomalies and the risk of live intrusion and responds accordingly, achieving layered control of safety risks. By aligning visual data and operating parameters with timestamps to generate a fused dataset, and outputting safety levels and corresponding control signals through quantitative scoring, the objectivity and relevance of the assessment are improved, ensuring precise matching between control actions and safety states.

The invention relates to the technical field of mine restoration, and provides mine soil ecological restoration equipment which comprises a side slope, a reinforcing hard net installed on the side slope and a plurality of planting grids arranged on the reinforcing hard net in an array mode, positioning ladder holes are formed in cross joints of the planting grids, and anchoring insertion cylinders are installed in the positioning ladder holes; a surface repairing layer is arranged on the planting grids; an inner expansion repairing assembly is arranged in the anchoring inserting cylinder, and a leakage guiding assembly is arranged at the bottom of the anchoring inserting cylinder. The internal expansion repairing assembly comprises a honeycomb repairing column arranged in the anchoring inserting barrel and a moisture uniformizing disc located at the top end of the honeycomb repairing column and fixedly connected to the upper side of the interior of the anchoring inserting barrel, and a water permeable hole core column is installed at the top of the moisture uniformizing disc. When the device is used, through gridding arrangement of the reinforcing hard net and the anchoring insertion barrels, the surface repairing layer and the internal expansion repairing assembly are cooperatively integrated, and a three-dimensional repairing network with point-surface linkage and internal and external linkage is formed.

This invention provides a flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades and its preparation method. By weight, the raw materials include: 80-95 parts bisphenol A type polycarbonate, 4-10 parts phenyl-containing polysiloxane microspheres, 1-4 parts mesoporous silica phosphorus-loaded microspheres, 0.3-0.8 parts silane coupling agent, 0.3-0.8 parts flame retardant, 2-5 parts organic nano-montmorillonite, 0.2-0.6 parts polycarbodiimide, 0.3-0.8 parts antioxidant, 0.3-0.7 parts light stabilizer, and 0.3-1.0 parts lubricant. The flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades provided by this invention possesses comprehensive properties of high light transmittance, high toughness, and heat resistance.

The invention relates to the technical field of corrosion inhibition, in particular to a composite corrosion inhibitor for an oil field pipeline and a preparation method of the composite corrosion inhibitor, and the composite corrosion inhibitor comprises an N-thiourea acetyl-ethoxylation modified imidazoline intermediate, a 2-pyridylaldehyde-diphenylamine-4-sodium sulfonate condensate, sodium cyanoboride and methanol. The preparation method comprises the following steps: carrying out cyclization, ethoxylation and thiourea acetylation on fatty acid and polyamine to prepare an N-thiourea acetyl-ethoxylation modified imidazoline intermediate, and dissolving the N-thiourea acetyl-ethoxylation modified imidazoline intermediate, 2-pyridylaldehyde, a diphenylamine-4-sodium sulfonate condensate and sodium cyanoboride in methanol according to a specific mass ratio to form the composite corrosion inhibitor. The technical problem that an oil field pipeline is poor in corrosion protection effect in a high-temperature, high-pressure, high-salinity and CO2 / H2S coexistence environment is solved, and synergistic and efficient corrosion prevention of multiple active components is achieved.

The invention relates to the technical field of mortar preparation, in particular to high-performance waterproof dry-mixed mortar and a preparation method thereof. The high-performance waterproof dry-mixed mortar is prepared from the following raw materials in parts by weight: 300 to 400 parts of cement, 550 to 650 parts of quartz sand, 1.5 to 3.0 parts of silane waterproof agent, 15 to 25 parts of hydrophobic redispersible latex powder, 0.2 to 0.5 part of water-retaining thickening agent, 0.5 to 1.5 parts of polycarboxylic acid water reducing agent, 3 to 8 parts of thixotropic lubricant, 0.3 to 1 part of coagulation accelerator, 20 to 50 parts of superfine filler and 0.5 to 1.5 parts of polypropylene fiber. The technical problem of non-uniform dispersion of trace components in high-performance mortar production is solved through the process combination of premixing the water-retaining thickening agent, the polycarboxylate superplasticizer, the thixotropic lubricant and the coagulant and then performing staged low-speed main mixing on the mixture and other raw materials; the effects of excellent waterproof and anti-seepage performance, excellent mechanical property and bonding strength, excellent crack resistance and high durability are achieved.

The invention discloses an endangered plant phoebe hainanensis identification and systematic monitoring method based on multi-source data fusion, and belongs to the technical field of endangered plant protection. According to the method, a potential distribution area is delineated through a species distribution model, individual accurate identification and filing are achieved through a multi-branch feature fusion model, multi-scale growth and microenvironment data are collected through Internet of Things nodes, and finally a'discovery-identification-monitoring-protection 'whole-process closed loop is formed through a unified data management platform. According to the method, phenological feature extraction, transfer learning modeling, man-machine collaborative verification and low-power-consumption Internet of Things monitoring technologies are adopted, and the problems that a traditional method is low in efficiency, insufficient in recognition precision and fragmented in monitoring are solved. According to the method, efficient discovery, accurate identification and long-term dynamic monitoring of the wild population of the phoebe hainanensis are achieved, scientific support is provided for protection decision making, and the method is convenient to operate and high in practicability and has protection value and application prospects.

This invention relates to the field of management technology and discloses a method and system for generating management suggestions for long-term, low-maintenance mixed flower borders. The method includes: acquiring plant growth data and community succession data based on the spatial distribution characteristics of the sample plot, plant growth morphology characteristics, and environmental characteristics during the flower border's growth cycle; extracting characteristic data on plant morphology, growth rhythm, and tolerance performance; classifying all plant feature vectors based on a decision tree model; determining distance parameters between different plant combinations based on the K-nearest neighbor algorithm and judging the stability trend and substitution relationship of each plant combination; analyzing the vertical hierarchy, coverage relationship, and color coordination relationship of plants based on the plant combination structure; determining the association results between the community discrimination results and the flower border structure layout based on an association rule algorithm; and determining management suggestions based on the association results and a planning suggestion model. This invention ensures the reliability of mixed flower border management.

The invention provides a compound sodium nitrophenolate-thidiazuron microemulsion and a preparation method thereof. The microemulsion comprises an effective component, a high-molecular long-chain EO-PO polymer and an auxiliary material part, wherein the high-molecular long-chain EO-PO polymer comprises a polymer with the molar molecular weight of 5000-30000. According to the invention, a high-molecular polymer is creatively used for coating a thidiazuron active compound in a nanoscale micro-droplet state, so that the problem that thidiazuron is greatly decomposed after the thidiazuron active compound and compound sodium nitrophenolate are compounded to prepare the microemulsion is solved; meanwhile, the high-molecular polymer disclosed by the invention replaces a traditional solvent dissolution form with a form of wrapping a thidiazuron active compound, so that a slow-release effect is achieved, the long-acting property of the whole preparation is improved, the medication frequency and the dosage are less, meanwhile, the high-molecular polymer is safe to crops, the plant vigor is improved, the fruit setting rate can be remarkably increased, and the stress resistance of plants is enhanced.

The invention provides a corrosion liquid composition based on alloy conductor melting mark identification and a preparation method thereof. According to the corrosion liquid, nitric acid and hydrochloric acid are mixed according to a specific proportion, modifiers such as benzotriazole and lauryl sodium sulfate are combined, components are regulated and controlled through ultrasonic treatment and oxidation, the selectivity, stability and corrosion rate of the corrosion liquid are optimized, glycerol is added into the corrosion liquid to serve as a stabilizer, and through vacuum defoaming treatment, the corrosion liquid has good corrosion resistance. According to the corrosion liquid, the effective period of the corrosion liquid is prolonged, the interference of bubbles on corrosion reaction is avoided, the recognition capability of the corrosion liquid on alloy conductor melting marks is enhanced by accurately regulating and controlling the oxidation-reduction potential, the melting mark area is clearer, the contrast ratio is higher, and the recognition precision of the alloy conductor surface melting marks can be effectively improved; and the corrosion liquid is widely applied to the fields of metal surface treatment, defect detection and the like, has relatively high stability, long-term effectiveness and selectivity, and can keep excellent performance after being used for multiple times and stored for a long time.

This invention discloses an esterase-responsive nanogel-modified bioprosthetic valve, its preparation method, and its application, belonging to the field of bioprosthetic valve technology. This invention solves the problem of balancing the anti-infective properties, biocompatibility, and high surface modification rate of bioprosthetic valves. The invention uses ester-containing methacrylates and antibiotic drugs as raw materials to synthesize esterase-responsive monomers, then synthesizes esterase-responsive nanogels, and then attaches them to the surface of the bioprosthetic valve. Under pathological conditions with high esterase concentrations, the ester bonds decompose, releasing the antibiotic drugs in situ, thereby treating bacterial infections, reducing inflammatory cell infiltration, and improving the anti-infective and anti-inflammatory properties of the bioprosthetic valve. Furthermore, the nanogel contains a large number of hydrophilic groups, forming a hydration layer on the bioprosthetic valve surface, effectively reducing the risk of thrombosis and coagulation, and resisting bacterial adhesion. The prepared bioprosthetic valve exhibits excellent anti-infective, anticoagulant, anti-calcification capabilities and stability.

The invention relates to the technical field of photocatalytic coatings, in particular to a nano photocatalytic coating for inhibiting peculiar smell adsorption, which comprises the following components: a visible light response type composite photocatalyst, an interface enhancer, a bonding reinforcement phase and a porous carrier material, through the synergistic effect of all the components, the coating achieves the integrated functions of adsorption, degradation and stabilization. The porous carrier material selectively adsorbs peculiar smell molecules and enriches the peculiar smell molecules on the surface of the coating, so that sufficient reactants are provided for photocatalytic reaction; the visible light response type composite photocatalyst efficiently degrades enriched odor molecules under visible light, so that adsorption saturation of the carrier is avoided, and cyclic regeneration of adsorption sites is realized; the interface reinforcer and the bonding reinforcement phase ensure the structural stability and the interface bonding force of the whole coating system, and ensure long-term effectiveness of adsorption and catalytic performance. Due to the synergistic effect, the peculiar smell adsorption inhibition rate and the degradation rate of the coating both reach 80% or above, and the coating also has excellent binding force and aging resistance.

The application provides a joint soft tissue balancing method and device, electronic equipment and storage medium, relates to the technical field of medical instruments, and comprises the following steps: fusing joint internal pressure data and joint pose data, establishing the correlation between joint contact force and joint space attitude; based on the joint gap displacement data collected during the operation of the patient and the corresponding joint contact force response data, a soft tissue stiffness model is constructed; based on the soft tissue stiffness model, the joint gap data, and the joint gap change amount, the joint contact force prediction value of the candidate prosthesis specification combination is determined; an optimization function is constructed, each specification combination of the candidate prosthesis is traversed, and the specification combination corresponding to the optimal value of the optimization function is taken as a recommended configuration scheme. The method and device provided by the application construct an intelligent closed-loop solution of "measurement-modeling-prediction-optimization" driven by data as a whole, and realize accurate, efficient and personalized joint soft tissue balancing.

The application relates to a kind of urban water supply network operation performance evaluation method, device, equipment and medium, method includes: water demand time series variation coefficient and second Haixian-William coefficient are input to the water supply network hydraulic model of pre-set and carry out hydraulic, water quality coupling calculation, the operation performance index of independent metering area is quantified, and the long-term operation performance change curve is generated based on the operation performance index of each independent metering area in each operating year;Analysis long-term operation performance change curve, identify the recession critical time node of water supply network in independent metering area, solve water supply network update optimization model, obtain the Pareto optimal non-inferior solution set containing the combination of different pipe replacement scheme and valve layout adjustment scheme in independent metering area, and the pipe network updating scheme suitable for long-term operation of pipe network is screened from the Pareto optimal non-inferior solution set.The application can significantly improve the long-term effectiveness and scientificity of urban water supply network partition management.

The invention discloses an intelligent prisoner education evaluation and transformation integrated system, and relates to the technical field of intelligent correction of prisoners. Comprising the steps that a data acquisition module acquires multi-modal data in real time; the atlas construction module is used for extracting psychological factor characteristics, emotion coding characteristics, behavior strategy characteristics and physiological anomaly index characteristics after aligning the multi-modal data according to a unified time axis, and constructing a state atlas with psychological factors as nodes and incidence relations between the factors as edges; the risk assessment module inputs the state atlas into a graph neural network to output psychological risk levels, recruitment tendency paths and key nodes; the task generation module generates a VR training instruction or a dialogue scene instruction according to the key node; the feedback updating module is used for collecting new behaviors and physiological data in the training process after receiving the instruction, and dynamically updating a state map. And through multi-modal data fusion and a dynamic graph closed-loop updating mechanism, precise risk assessment of the prisoners and self-adaptive optimization of a personalized correction scheme are realized.

The invention discloses a preparation method of a cotton linter derived nanocellulose enhanced hydrogel plugging agent, and relates to the technical field of hydrogel plugging agent preparation, and the preparation method comprises the following steps: carrying out alkali boiling degreasing and bleaching treatment on cotton linter to obtain pretreated cotton linter; carrying out sulfuric acid hydrolysis and high-pressure homogenization treatment on the pretreated cotton linters to obtain nano cellulose dispersion liquid; carrying out TEMPO mediated oxidation treatment on the nano-cellulose dispersion liquid to obtain modified nano-cellulose of which the surface contains carboxyl; mixing the modified nano cellulose with acrylamide, N-isopropylacrylamide and sodium carboxymethyl cellulose, and adding multivalent metal salt to form a monomer premixed solution containing ionic crosslinking sites; loading an organic chromium cross-linking agent on the surface of the modified nanocellulose in the monomer premixed solution to construct a slow-release cross-linking system; and adding a redox initiator into the slow-release cross-linking system, mixing, injecting into the stratum, and carrying out in-situ free radical polymerization, nano-cellulose graft copolymerization, metal ion dynamic coordination and cross-linking agent slow release.

This invention discloses the production technology and usage method of high-selenium-enriched rice, including the following steps: screening and determining high-selenium-enriched rice varieties; fertilizer formulation and application for selenium-enriched rice cultivation; determining the key period for selenium supplementation in rice; selecting the time for selenium supplementation operations; application of organic selenium-rich plant nutrients and control of selenium supplementation frequency; harvesting and processing high-selenium-enriched rice; determining the graded consumption amount of selenium-enriched rice for healthy individuals; implementing a phased consumption plan for selenium-enriched rice for sub-healthy individuals; and implementing personalized consumption and supplementary selenium supplementation plans for individuals with special conditions. This invention integrates two core modules: standardized production technology for high-selenium-enriched rice and graded personalized consumption methods, forming a systematic solution for the entire process from planting to consumption. It breaks through the industry bottleneck of the existing disconnect between selenium-enriched rice production and consumption, and improves the effectiveness and scientific nature of selenium supplementation through selenium-enriched rice.

The invention provides an inorganic matter and organic matter compounded clay stabilizer for water injection, and discloses that dimethyl diallyl ammonium chloride is used as a raw material, and a phenol polymerization inhibitor is added to prevent polymerization in the use process, so that cationic monomer micromolecules containing double bonds are used as an organic cationic clay stabilizer, and the water injection efficiency is improved. When being used together with the same small-molecular-weight amine raw material, namely triethylamine hydrochloride, the anti-clay swelling agent has the performance of preventing clay swelling, anti-scouring capability and long-term effect, and has better performance of preventing clay swelling after being compounded with cheap inorganic raw materials, namely monopotassium phosphate, industrial ammonium chloride and industrial potassium chloride; the prepared clay anti-swelling agent compounded by the inorganic matter and the organic matter not only has excellent capability of preventing clay swelling, but also has good anti-scouring capability and good washing resistance, and plays an innovative demonstration role in preventing damage of clay swelling and migration to a reservoir in water injection and improving water drive recovery efficiency.

The invention relates to a method for preventing and controlling xylobacter asiaticosus, which comprises the following steps of: in a larva trunk boring period, compounding chlorbenzuron, chlorofluoro.imidacloprid and abamectin.mineral oil according to a volume ratio of 1: (1-2): (1-3), diluting by using clear water to 100 times, and spraying near wormholes with fresh fecula; in the adult eclosion peak period, sex pheromone trappers and trap lamps are installed in the forest and used for rapidly killing the adults; in the spawning period, pyriproxyfen, bifenthrin and thiocyclam are compounded according to the volume ratio of 3: (1-2): (1-2) and then diluted with clear water to 100 times to be sprayed, the prevention and control effect is remarkably improved by integrating larva chemistry, adult trapping and killing and spawning period chemical synergistic prevention and control, the number of active worm holes serves as an evaluation index, the worm decline rate of the optimal parameter combination can reach 85.0%, and the control effect is good. The method is obviously superior to a parameter deviation prevention scheme.

The invention discloses a mine remediation soil layer structure improvement method, and relates to the field of soil layer remediation, and the method comprises the following steps: S1, preparing a soil seed unit: mixing to-be-improved mine barren surface soil with an adhesive, and printing into a hollow dodecahedron unit with the wall thickness of 5-10 mm and a closed cavity inside by using three-dimensional printing equipment; the cavity is filled with a core mixture composed of plant seeds, a water-retaining agent, a microbial agent and a slow-release fertilizer, and the surface of the unit is subjected to hydrophobization treatment to prepare soil seeds. The problems that in the prior art, an improved layer is poor in function collaboration, low in environmental adaptability and resource utilization efficiency, poor in water diversion performance, poor in water diversion performance, poor in water diversion performance and the like are solved, and the service life of the improved layer is prolonged. The seed germination microenvironment is uncontrollable, and the restoration process lacks intelligent response capability passively.

The invention discloses a seaweed organic fertilizer beneficial for adjusting soil microorganisms and a preparation method thereof, and belongs to the technical field of bio-fertilizers, the organic fertilizer contains macroelements nitrogen, phosphorus and potassium necessary for plant growth, also contains medium elements calcium, magnesium and sulfur necessary for plant growth, and trace elements boron, iron and zinc, can effectively promote plant growth, and has a good application prospect. The enzyme activity is improved, the vegetative growth and reproductive growth capacities of plants are enhanced, the crop yield is further improved, the survival time and the loading capacity of microorganisms can be improved through the design of the double-shell core-shell structure, and the utilization rate of nutrients is further improved.

The invention discloses an acidified charcoal composite modifier for improving saline-alkali soil and a preparation method thereof, and belongs to the technical field of soil improvement. In order to solve the problems that in the prior art, a traditional saline-alkali soil single improvement material or a simple compounding technology can only aim at a single pain point, and the effect is difficult to last and stabilize, the invention provides an acidified biochar composite modifier for saline-alkali soil improvement. According to the acidified biochar composite modifier, humic acid grafted modified acidified biochar is used as a core salt-reducing alkali-reducing base material, vinasse is used as a fertilizing carrier, a DNA-calcium phosphate composite gel precursor is introduced, natural zeolite and a composite salt-tolerant microbial agent are matched, and a granular product is prepared through a gel granulation process; a synergistic mechanism of targeting adsorption-chemical neutralization-biological synergism-mineralization immobilization is constructed, and the composite material has the advantages of high salt and alkali reduction efficiency, long-acting stability, environmental friendliness and simple preparation.

The application discloses an environment-friendly antibacterial blended yarn and a preparation method thereof. Raw materials of the blended yarn include natural plant fibers and modified modal fibers in a mass ratio of (65-70):(30-35); and the modified modal fibers are grafted with phenolic chitosan on surfaces. The natural plant fibers and the modified modal fibers are both green and environment-friendly fiber products. The natural plant fibers can provide part of antibacterial performance. The modified modal fibers have high dry and wet strength, and can compensate for the insufficient strength of the natural plant fibers. The obtained blended yarn has excellent strength and certain antibacterial property. Meanwhile, the modified modal fibers are grafted with phenolic chitosan on surfaces. The chitosan has excellent antibacterial performance, and the phenolic group can improve the poor cohesion between the natural plant fibers, so that the natural plant fibers and the modified modal fibers can be tightly combined together. The dry and wet strength and the antibacterial property of the obtained blended yarn are obviously improved.

The application provides a modular aquatic higher plant ecological treatment method and system for sea urchin / sea cucumber breeding tail water, and belongs to the technical field of breeding tail water treatment. The application adopts a tail water introduction-primary rough filtration-secondary ecological purification-tertiary deep purification gradient process, and the treated tail water is divided into two streams, one of which is used for breeding ponds and the other is discharged up to the standard. The application does not add chemical agents, realizes residue bait reuse and tail water circulation, is stable, efficient, low in cost, easy to maintain, suitable for large-scale breeding, and can directly reuse the treated tail water after disinfection, greatly saves seawater resources, forms a complete breeding water circulation closed loop, and has the advantages of ecology, practicability and economy, and is suitable for tail water treatment and resource utilization of various sea urchin / sea cucumber breeding modes.

This invention discloses a method for live pipeline leak sealing based on in-situ metal growth and its application, belonging to the field of online repair technology for pressurized pipelines. The method includes: pre-treatment of the leaking area; forming a repair layer consisting of a metal transition layer and a metal-ceramic composite layer in the leaking area using low-temperature solid-state deposition technology without interrupting pipeline operation; and finally, post-treatment of the repair layer by shot peening and low-temperature laser polishing to improve its density and surface properties. This invention employs low-temperature processes such as cold spraying, completely avoiding the risks of hot work operations and achieving safe and efficient repair under pressurized pipeline conditions. The gradient functional repair layer formed by this invention has high bonding strength with the pipeline substrate and excellent corrosion resistance and erosion resistance, making it particularly suitable for repairing pressurized pipeline leaks in the power, chemical, and marine engineering fields where continuous production is required.

This invention discloses a metal gasket with a high-temperature protection mechanism and its processing method, relating to the field of sealing technology. It comprises a gasket body and cover plates covering the top and bottom of the gasket body. Interlocking protection components are arranged at equal angles along the circumference of the gasket body. Each interlocking protection component includes: a displacement drive element made of a unidirectional shape memory alloy; a guide slider, one end of which abuts against the displacement drive element, and the other end extending to the vicinity of the sealing surface of the gasket body; and a breakable protective plate, which is fixedly covered on the outer end face of the guide slider and flush with the overall sealing surface of the gasket. This metal gasket with a high-temperature protection mechanism and its processing method actively generate sealing protrusions under abnormal high-temperature conditions, dynamically compensating for sealing defects, effectively solving the problems of gasket creep relaxation and irreversible seal deterioration under high temperatures, and significantly improving sealing reliability under high-temperature conditions.

The utility model discloses a regulating valve which comprises a valve body and a plurality of circulation holes formed in the side wall of the valve body, the valve body is in threaded connection with a valve element, the valve element is provided with a T-shaped overflow channel, an overflow hole is formed in the end, close to the circulation holes, of the valve element, and the regulating valve further comprises a blocking rod arranged in the overflow hole. The end, close to the locking nut, of the plugging rod is fixedly connected with a sealing block, the sealing block is matched with the inner diameter of the overflow channel, the valve element is provided with an extrusion assembly used for extruding the sealing block, and the sealing block is provided with a speed reduction assembly used for reducing the speed of resilience force of the extrusion assembly. According to the regulating valve, extrusion pushing force is provided for the sealing block, meanwhile, the risk that the extrusion spring is corroded and damaged due to the fact that the extrusion spring makes contact with a medium is reduced through protection of the extrusion spring, and therefore the long-term effect of elastic pushing of the sealing block is improved.

The invention discloses a method for preparing a soil arsenic passivation material by cooperatively treating agriculture and forestry solid waste and red mud based on a self-propagating combustion technology, and belongs to the technical field of solid waste resource.The agriculture and forestry solid waste is crushed and then evenly mixed with the red mud; the mixture is placed in a self-propagating combustion reaction device, self-propagating combustion is carried out after ignition, and biomass pyrolysis and red mud mineral component activation are completed; and after the reaction is finished, naturally cooling to obtain the soil arsenic passivation material. According to the method, the calcium and iron activity of the red mud and the porous adsorbability of the biomass are combined in situ through a self-propagating combustion process, the problems of solid waste pollution and soil arsenic pollution are solved through a low-cost and low-energy-consumption process, cooperation of solid waste reduction and soil remediation is achieved, and a referential technical scheme is provided for circular economy and ecological management.