2083 results about "Construction waste" patented technology

The invention discloses a material supply and resource recovery collaborative scheduling method and system, and belongs to the technical field of logistics scheduling, and the method comprises the steps: obtaining a material supply instruction and a garbage recovery instruction, carrying out the image recognition of a building garbage picture, obtaining the garbage attribute, and generating a demand instruction library; the method comprises the following steps: establishing a feature knowledge base, setting a spatial clustering method, carrying out spatial clustering and time window screening, carrying out geographic coordinate analysis and time sequence sorting on material demand points and recovery points, generating an initial task pool, setting a loading matching method, and generating a material supply and recovery loading schematic diagram according to building material and garbage attributes; a circulation path is planned, a path planning method is set, an ant colony algorithm is used for initial path planning, a monitoring feedback method is set, data are returned in real time, the running state of the vehicle is monitored, and an alarm is given out immediately once abnormity is found; and the sorted and regenerated aggregate data is synchronized to a building material database, a resource feedback method is set, a reverse transportation task is identified, and a material supply and resource recovery closed loop is formed.

The invention provides solid-waste-based fluid-state solidified soil and a preparation method of the solid-waste-based fluid-state solidified soil. The solid waste-based flow state solidified soil comprises a filling material, a framework material and a reinforcing material, the filling material comprises the following components in parts by weight: 60-95 parts of engineering residue soil, 5-40 parts of alkaline waste residues, 5-30 parts of a cementing material, 1-10 parts of a polymer emulsion, 0.5-3 parts of silica fume, 0.1-1 part of cellulose ether, 0.1-1 part of a compound water reducing agent and 0.5-2 parts of an exciting agent. The framework material comprises waste concrete blocks and / or waste brick blocks; the reinforcing material comprises a waste safety net and / or fiber gridding cloth. The flow-state solidified soil can achieve rapid backfilling in a narrow space, is excellent in shrinkage cracking resistance and impermeability, simple in preparation method and convenient to apply and construct, effectively solves the problems that the flow-state solidified soil is large in shrinkage, prone to cracking and the like, improves the quality of a backfilling project, achieves in-situ resource utilization of construction waste, and reduces the construction cost. And the construction cost of engineering can be reduced, and the problems of land occupation, environment pollution and the like caused by solid waste stacking are reduced.

The invention provides a building waste multi-source information fusion intelligent sorting method and system, and the method comprises the steps: arranging a plurality of different types of sensors on a conveying belt, obtaining multi-source data including a visible light image, three-dimensional information, spectral data, weight and vibration signals in real time, carrying out the Kalman filtering denoising and feature extraction, and carrying out the feature extraction of the multi-source data; carrying out weighted fusion on different modal features by adopting a multi-modal fusion algorithm and combining an attention mechanism to obtain a fusion feature vector; and inputting the fusion feature vector into a classification convolutional neural network, outputting the type and confidence of the construction waste, and controlling a sorting execution mechanism to realize accurate putting based on the confidence. Different wastes such as concrete blocks, metal, wood and plastic can be efficiently identified and sorted in various complex environments, the automatic sorting efficiency and accuracy are greatly improved, and the industrial application value is high.

The invention discloses high-performance fluid-state solidified soil for backfill based on composite ardealite of building residue soil, which is prepared by taking the building residue soil as a core raw material, taking a compound of a polycarboxylic acid water reducer and hydroxypropyl methyl cellulose as a fluidization regulator, and mixing the fluidization regulator and the building residue soil to prepare the high-performance fluid-state solidified soil for backfill. Superfine slag powder, fly ash, nano silicon dioxide, metakaolin and ardealite are used as curing agents, so that the fluid-state solidified soil with strong performance is obtained. Through the synergistic effect of all the components and innovative processes such as liquid nitrogen low-temperature grinding, nano material compounding and a segmented vacuum stirring process, the effect that the ultrahigh strength of the construction waste soil reaches 7.5 MPa within 14 days is achieved for the first time and is improved by 40% or above compared with that of conventional solidified soil, and the industrial problem that traditional waste soil is insufficient in solidification strength is solved; and collaborative optimization of strength and fluidity is realized. Meanwhile, efficient resource utilization of the construction waste is achieved, land occupation and environmental pollution caused by muck landfill are greatly reduced, and the requirement for green and sustainable development is met.

The invention provides a sintered hollow batten for buildings and a preparation method, and belongs to the technical field of novel wall materials, the sintered hollow batten for buildings comprises the following raw materials: high-calcium fly ash, construction waste recycled aggregate, clay, sulphoaluminate cement, a foaming agent, reinforced fibers and an additive; wherein the particle size of the construction waste recycled aggregate is 0.5-5mm, and the construction waste recycled aggregate is subjected to plasma activation treatment; a nano TiO2 photocatalytic coating is loaded on the surface of the construction waste recycled aggregate; the reinforced fibers are composite fibers of basalt fibers and polypropylene fibers, and the mass ratio of the basalt fibers to the polypropylene fibers is (1: 1)-(1: 2). According to the sintered hollow batten for the building, the building waste recycled aggregate subjected to plasma activation treatment is adopted, and the nano titanium dioxide photocatalytic coating is loaded, so that the bonding strength of the aggregate is greatly improved, and the hollow batten is endowed with the function of degrading pollutants such as formaldehyde.

The invention discloses a building solid waste road performance index and multi-path utilization scene intelligent evaluation method. The method comprises the steps that the mass content of red bricks, the mass content of needle-sheet-shaped particles and the particle gradation in building solid waste particles are obtained through a machine vision system; the pavement performance indexes, namely CBR value, water absorption rate and crushing value, of the building solid waste are obtained through tests; according to the influence rules of the mass content of the red bricks, the mass content of the needle-sheet-shaped particles and the grain composition in the building solid waste particles on the building solid waste road performance indexes, an estimation model of the building solid waste road performance indexes is established. According to the method, the mass content of the red bricks, the mass content of the needle-sheet-shaped particles and the grain composition in the building solid waste particles are obtained in real time on the basis of machine vision, the road performance indexes of the building solid waste are predicted through the prediction model of the road performance indexes of the building solid waste, and the detection efficiency and accuracy are improved.

The invention discloses a construction waste tracking method based on a graph neural network. The method comprises the following steps: constructing preprocessed construction waste transportation multi-source data; constructing a construction waste transportation network weighted heterogeneous graph based on the preprocessed construction waste transportation multi-source data; a GraphSAGE node embedding vector is generated and updated; outputting an interruption point event consisting of the interruption position, the occurrence moment and the state element; extracting a local sub-graph with a fixed hop count from the weighted heterogeneous graph of the construction waste transportation network; a detour candidate path set with priority is obtained, and a self-healing tracking path with the highest score is selected; and forming an updated construction waste transport path tracking expected path, marking a potential illegal dumping risk node by combining compliance risk information in a GraphSAGE node embedding vector, and outputting a construction waste path tracking result. According to the method, detour path optimization sorting and high-risk path elimination are realized, and path reconstruction is enabled to better meet urban transportation scheduling and supervision requirements.

The invention discloses a building concrete waste treatment system, which belongs to the technical field of building waste treatment, and is characterized in that a data acquisition module acquires waste physical attributes and inputs the waste physical attributes into a model generation and optimization module; the model generation and optimization module establishes a waste physical characteristic model, dynamically updates the waste physical characteristic model and outputs a dynamic waste physical characteristic model to the strategy generation module; the strategy generation module outputs equipment operation parameters; the strategy mapping module maps the equipment operation parameters into physical execution signals through an equipment instruction mapping model to obtain execution results, and the execution results are input into the strategy feedback optimization module; and the strategy feedback optimization module identifies the execution deviation in the execution result and feeds the execution deviation back to the strategy generation module to optimize the equipment operation parameters. According to the scheme, an intelligent algorithm and physical modeling are combined, the waste treatment process is optimized through real-time data collection and feedback, equipment parameters are adjusted based on different characteristics of the waste, and the problems of excessive treatment and resource waste are avoided.

The utility model provides a separation device for construction waste recycled aggregate, which relates to the technical field of construction waste recycled aggregate and comprises a screening frame, a light material separation mechanism is arranged above the screening frame and comprises an eccentric wheel and a fixed box fixedly connected to the inner wall of the screening frame, and the eccentric wheel is arranged on the fixed box. An inclined plate is fixedly connected to the inner wall of the fixed box, a swing plate is hinged to the bottom face of the inclined plate, and the eccentric wheel is matched with the swing plate; the inner wall of the fixed box is fixedly connected with a breathable plate, and the bottom face of the breathable plate is fixedly connected with a first fixed hopper. According to the separation device for the construction waste recycled aggregate, through the arrangement of the light material separation mechanism, light materials such as wood chips and plastics in construction waste can be separated and recycled, the recycling efficiency is improved, resource waste is avoided, the light materials such as the wood chips and the plastics in the recycled aggregate are separated, and the quality of the recycled aggregate can be improved.

The invention relates to the technical field of contaminated soil and construction waste treatment, in particular to a contaminated soil and construction waste mixing and conveying device which comprises a conveying mechanism, a driving unit, a cleaning unit and a scattering part. In the process of conveying a mixture, the mixture is heated and dried through external heating equipment, the inner surface of the screening roller is scraped and cleaned in real time through a scraping plate, contaminated soil is prevented from blocking the screening roller, meanwhile, the contaminated soil is scattered through a scattering part, the retention time of the contaminated soil in the area on the left side of the variable-pitch spiral plate is prolonged, and the screening efficiency is improved. The drying effect of the polluted soil is improved, and the screening and discharging efficiency and effect of the polluted soil are improved; by means of the characteristics that the pitch of the left side of the variable-pitch spiral plate is small and the pitch of the right side of the variable-pitch spiral plate is large, a mixture in the conveying process is gathered in a spiral pitch area with the small pitch of the left side of the variable-pitch spiral plate, and then it is ensured that the mixture is fully dried and scattered by family members in the area.

The invention provides construction waste and slag mixed crushing and powder brick making equipment, and relates to the field of construction waste resource utilization. The equipment takes an innovative crushing and brick making process as a core, and efficient conversion of construction waste and slag is realized through efficient mechanical design and an intelligent control system. The equipment mainly comprises the following key components: a collision seat and a rolling seat for preliminary crushing, a connecting rod and a rotating seat are arranged in the collision seat and the rolling seat, and the lower side wall is rotationally connected with a conical crushing roller; the internal output end of the supporting inner frame is fixedly connected with the rotating base, and the upper side wall of the supporting inner frame is connected with the rotating shaft and the throwing frame; a supporting inner cavity is formed in the adjusting sleeve on the outer side wall of the rolling base. Through multi-stage crushing and intelligent control, the problems that in the prior art, the crushing efficiency is low, particles are not uniform, and the automation degree is low are effectively solved, an efficient and environment-friendly solution is provided for resource utilization of construction waste and furnace slag, and industrial technical progress is promoted.

The invention relates to the technical field of building construction, in particular to a foundation construction material and a dynamic compaction construction method.The construction method comprises the following steps that S1, an early-stage preparation stage is conducted; s2, a trial compaction and parameter optimization stage; s3, a main body construction stage; s4, a multi-field coupling maintenance stage; s5, a foundation quality detection stage; and S6, an acceptance and filing stage. Through intelligent sensing and dynamic parameter regulation and control, self-adaptive optimization of the tamping process is achieved, over-tamping or under-tamping is avoided, and the foundation bearing capacity is improved by 15%-20%; the layered filling design of the gradient material is matched with different depth mechanical requirements, the grading continuity coefficient is larger than or equal to 0.5, and the compactness of the pier body is improved by 25% or above; an innovative Q value evaluation formula integrates multi-dimensional parameters, the detection accuracy rate reaches 90% or above, and the rework rate is remarkably reduced; the maintenance period is shortened to 7 days through the multi-field coupling maintenance technology, and the construction efficiency is improved by 50%; and the material cost is reduced by 30% by recycling the construction waste, and the method has economical efficiency and environmental protection performance and is suitable for various complex foundation treatment sites.

The utility model provides a superhigh reinforced body preloading structure. The treatment structure comprises a reinforced body working cushion layer, a water separation and drainage reinforced layer and an ultrahigh reinforced body stacking structure layer. The reinforced body working cushion layer comprises machine-made sand and an A-type geocell, the water insulation and drainage reinforced body structure comprises non-woven geotextile, a seepage insulation film and multiple layers of composite drainage grids, the composite drainage grids are adopted to replace a medium-coarse sand drainage layer, a vertical drainage plate is directly connected with the middle layer of composite drainage grids, and the vertical drainage plate is directly connected with the middle layer of composite drainage grids. The ultrahigh reinforced body stacking structure layer comprises non-woven geotextile, construction waste, B-type geocells and mineral powder. The foundation treatment effect is good, the sand consumption is reduced, the manufacturing cost is saved, design and engineering application are facilitated, and the engineering application prospect is very wide.

The invention relates to the field of flow-state solidified soil, and discloses flow-state solidified soil prepared from construction waste, preparation equipment and a preparation method. The pre-dehydration module is used for controlling the water content of discharged materials to be less than or equal to 14%; the system further comprises a main drying system, an auxiliary material adding device, a water adding device and mixing equipment. The main drying system comprises a high-temperature drying area, a high-temperature buffering area and a heat preservation discharging area which are arranged in the vertical direction, materials treated by the pre-dehydration module are lifted into the high-temperature drying area through lifting equipment, the main drying system comprises at least two sets of material conveying belts, and a plurality of hot air openings are evenly formed in the top of the high-temperature drying area; an inlet of the hot air pipe is communicated with an air cavity heated by a heat source; a recovery channel communicating with the portion, close to the bottom, of the heat preservation discharging area is arranged on one side of the main drying system, and an obliquely-arranged dust baffle is arranged in the recovery channel. According to the invention, the problems of fluctuation of construction waste sources and large change of material moisture content in the prior art are solved.

A method for intelligent sorting, detection, and recognition of construction waste. Construction waste images are collected as the original image sample set in the construction waste sorting site, the SRGAN algorithm is improved to preprocess the construction waste dataset images, and the preprocessed dataset is labeled and divided into train, validation, and test sets at an 8:1:1 ratio. An improved YOLOv8 detection and recognition model which introduces receptive field attention convolutions and multidimensional collaborative attention modules in the feature extraction part of the backbone is applied. This method for intelligent sorting, detection, and recognition of construction waste replaces manual labor with the construction waste intelligent sorting, detection and recognition method, solves the problem of loss of construction waste image features due to vibration of the conveyor belt and mutual occlusion of construction waste during the intelligent sorting process.

The invention discloses a method for preparing low-carbon cement based on construction wastes, which comprises the following steps: carrying out deep hydrothermal reaction on the construction wastes by using an autoclave under high-temperature and high-pressure conditions, so that silicon-aluminum minerals in the construction wastes are subjected to more thorough hydrothermal rearrangement to generate more stable hydrated silicate and aluminosilicate; the reaction activity of the clinker can be improved at the subsequent lower calcining temperature, so that the utilization rate and the high activity of complex components such as the building wastes in the cement preparation process are realized. The low-carbon cement disclosed by the invention is relatively high in later compressive strength and breaking strength, the strength grade of the low-carbon cement is 32.5, and the low-carbon cement meets building requirements and can be widely applied to the fields of buildings, roads and the like. According to the invention, closed cycle of solid waste-material is realized through waste recycling, and double innovation of material performance and ecological benefit is achieved.

The invention discloses an underwater acoustic-magnetic multi-modal fusion processing method, which comprises the following steps: carrying out preprocessing and time-space alignment on collected sonar and magnetic data, and extracting a morphological feature vector and a magnetic feature vector of a pipeline; based on a pipeline route trend, calculating an optimal matching path of a sonar contour and a magnetic force abnormal zone through dynamic time warping, establishing acoustic-magnetic mapping, and fusing features to generate a joint vector; finally, the type and state of the pipeline are judged according to the combined characteristics, and the problem that in a near-shore port and an industrial area water area, due to the interference of construction waste and the influence of a pipeline coating layer, a single sonar is difficult to accurately detect the pollution discharge pipeline and the cable is solved. According to the method, the complementarity of acoustic and magnetic characteristics is utilized, the accuracy of pipeline detection in a complex scene is improved, and reliable data support is provided for operation and maintenance of near-shore water area pipelines.

The embodiment of the invention provides a method and system for achieving intelligent sorting of construction waste based on computer vision. The method is applied to the computer vision technology field. The method comprises the steps of material conveying and primary induction, multi-modal data acquisition and synchronization, multi-modal data preprocessing and correction, robust target recognition and classification, high-precision three-dimensional pose estimation and grabbing point planning, intelligent sorting decision and mechanical arm control, sorting execution and state monitoring and adaptive learning and optimization. In this way, by introducing multi-modal sensing, deep learning and three-dimensional geometry fusion recognition, high-precision three-dimensional pose estimation and a self-adaptive control and feedback optimization mechanism, the automation level, efficiency and precision of construction waste sorting and the stability of the system in a complex environment are remarkably improved.

The invention provides a building solid waste self-adaptive sorting method and system based on multi-modal vector retrieval. The method comprises the steps that original data of building solid waste are collected; extracting multiple data features from the original data; fusing the plurality of data features to obtain a fused feature vector; performing similarity matching on the fused feature vector database in a vector retrieval mode, and confirming solid waste material classification and a corresponding sorting decision instruction; and based on the sorting decision instruction, building solid waste sorting is executed. The problems that a traditional sorting technology is low in precision and poor in adaptability are solved. The system can be widely applied to the fields of construction waste recovery, resourceful treatment and the like, and has remarkable economic and environmental benefits.

The invention discloses a method for synergistically preparing recycled aggregate from urban renewal garden waste and building waste, and relates to the field of treatment of garden waste and building waste. The method comprises the following steps: carrying out molecular-level deconstruction pretreatment on garden wastes, destroying cell walls by adopting dual-frequency ultrasound combined with biological enzymolysis, and treating the building wastes by combining high-pressure water jet with abrasive impact; performing nano-scale composite granulation, adding a nano-composite binder, and introducing CO2 to form a gel transition layer; by means of plasma-assisted sintering, particle diffusion is accelerated by means of radio-frequency plasma and an electric field; chemical vapor deposition is adopted, and a TiN-TiO2 gradient functional coating is formed; real-time monitoring and regulation are performed through a multi-mode sensor network and an intelligent algorithm, and process parameters are adjusted according to a product performance prediction result. The recycled aggregate disclosed by the invention is high in strength, good in heat preservation and strong in freezing resistance; negative carbon emission reduction is achieved in the production process, an intelligent system guarantees stable product quality, environmental protection and economic benefits are achieved, and urban update and solid waste treatment green transformation are promoted.

The invention provides an intelligent sorting system and method for construction waste, and belongs to the technical field of construction waste sorting. The system comprises a feeding machine, a spiral screen, a first conveying belt, a second conveying belt, a third conveying belt, an inclined sorting conveying belt, an electromagnetic iron remover, a bouncing screen, a fourth conveying belt, a fifth conveying belt, a bar screen, a sixth conveying belt, a seventh conveying belt, an eighth conveying belt, a flip-flow screen, a ninth conveying belt, a tenth conveying belt, a magnetic substance collecting area, a light substance collecting area, a visual auxiliary sorting room and a crushing transfer area. A finished product collecting area and a control device; according to the construction waste sorting system, through combination of multi-stage screening and intelligent sorting, efficient and accurate sorting of construction waste is achieved, it is guaranteed that the purity of concrete and tiles entering the crusher is high, the sorting efficiency is remarkably improved, and the labor cost is reduced.

The invention relates to the technical field of muck crushing, and discloses a building muck utilization device for land reclamation and remediation, the building muck utilization device for land reclamation and remediation comprises a rack, the top of the rack is fixedly connected with a motor I, the output end of the side wall of the motor I is fixedly connected with a belt pulley I, and two sliding grooves are formed in the inner wall of the rack; an impact convex plate is arranged on the inner wall of the rack, a second motor is started to drive convex rods to rotate, the two convex rods rotate at the same time through a driving assembly, the protruding position of a cam groove can push a sliding frame to transversely move, the impact convex plate and an impact concave plate are close to each other, meanwhile, the impact convex plate can make contact with the protruding position of a concave-convex plate, and therefore the impact convex plate and the concave-convex plate are extruded; and when the muck particles are extruded through the impact convex plate and the impact concave plate, the muck particles are longitudinally rubbed, large muck particles are crushed and crushed into uniform small blocks, and the situation that part of the muck particles are large, and the backfilling uniformity is affected is effectively prevented.

The invention relates to the technical field of separation of light and heavy objects in construction waste, and discloses a winnowing machine for separation of light and heavy objects in construction waste, which comprises a protection box, a rectangular plate is fixedly connected to the front surface of the protection box, a plurality of supporting legs are fixedly connected to the lower surfaces of the rectangular plate and the protection box, and a winnowing assembly is arranged on the protection box. The winnowing assembly comprises a winnowing box, the winnowing box is fixedly connected to the upper surface of the protection box and communicates with the interior of the protection box, the rear surface of the winnowing box is fixedly connected with a first discharging box communicating with the winnowing box, a triangular baffle is fixedly connected into the first discharging box, and the lower surface of the first discharging box is fixedly connected with a second discharging box communicating with the first discharging box. A first inclined plate is fixedly connected to the inner wall of the rear side of the winnowing box, a batch of construction waste can be sorted twice by arranging the winnowing assembly, the separation quality of light and heavy objects in the construction waste is improved, and then the practicability of the winnowing machine for separating the light and heavy objects in the construction waste is improved.

The invention belongs to the field of solid waste resource utilization, and particularly discloses a method for preparing flow-state solidified soil through cooperation of construction waste recycled aggregate and steel slag micro powder. The fluidized solidified soil is prepared from the following components in parts by weight: 40 to 60 parts of steel slag micro powder, 10 to 30 parts of recycled micro powder, 20 to 40 parts of recycled coarse aggregate, 15 to 30 parts of recycled fine aggregate, 10 to 20 parts of recycled fine aggregate, 25 to 40 parts of water and 0.5 to 1.5 parts of polycarboxylate superplasticizer. A steel slag micro powder and regenerated micro powder self-activated gelling system is adopted to replace a traditional gelling material and is matched with regenerated coarse, fine and fine aggregate three-stage grading to construct a close packing structure, and then staged CO2 mineralization treatment is performed, so that the solid waste mixing amount is increased, carbon emission is reduced, the drying shrinkage rate of the prepared flow-state solidified soil is greatly reduced, and the quality of the prepared flow-state solidified soil is improved. Meanwhile, the fluidity is regulated and controlled through the polycarboxylic acid water reducing agent, the constructability is guaranteed, and a low-carbon and high-efficiency path is provided for large-scale utilization of the construction waste and the steel slag.

The invention relates to the technical field of concrete block autoclaving, in particular to an autoclaving device for producing concrete block bricks based on building waste, which comprises a pipeline I, a kettle cover, a threaded rod, a connecting block I, a convex block, a disc, an L-shaped block I, an L-shaped block II, a baffle block and a pipeline II, the connecting arm is communicated with a pipeline I; a kettle cover is fixedly connected to the pipeline I and is in contact with the still kettle; a threaded rod is screwed on the connecting arm; a first connecting block is fixedly connected to the threaded rod. The first connecting block is fixedly connected with a protruding block. The kettle cover is rotationally connected with a disc; a groove is formed in the disc, and the protruding block is located on the inner side of the groove. A worker only needs to unscrew the kettle cover according to conventional operation, excessive steam in the still kettle can be discharged through the second pipeline, the situation that the worker is scalded due to the fact that a large amount of steam gushes out when the kettle cover is opened is avoided, additional procedures are not needed for discharging the steam, the manual operation difficulty is reduced, and the efficiency is improved.

The invention discloses a modification method and application of recycled concrete aggregate. The modification method comprises the following steps: pretreatment, physical modification, chemical modification and surface enhancement treatment. The waste concrete is efficiently recycled, the pollution of construction waste to the environment is reduced, the exploitation amount of natural aggregate is reduced, and natural resources are protected; meanwhile, a physical, chemical and surface enhancement treatment synergistic modification mode is adopted, and modification steps are mutually matched and promoted; physical modification creates good surface conditions for chemical modification, chemical modification further optimizes the surface components and structure of the aggregate, surface enhancement treatment finally improves the surface performance of the aggregate, various problems existing in the recycled aggregate are effectively solved, and the comprehensive performance of the recycled aggregate is comprehensively improved; the application range of the building material in building engineering is expanded, the cost of the building material is reduced, and the building material has remarkable economic benefits and environmental benefits.

The invention provides a recovery device for building waste plastic building materials, and relates to the field of waste recovery devices.The recovery device comprises a feeding mechanism, a crushing mechanism, a separating mechanism and a melting granulation mechanism, and further comprises a crushing system and an electric control system; according to the crushing system, a primary crushing unit is driven by a first variable frequency motor; the secondary crushing unit is arranged at the discharging end of the primary crushing unit and is driven by a second variable frequency motor; the screening unit is arranged below the secondary crushing unit; wherein the electric control system is electrically connected with the first variable-frequency motor and the second variable-frequency motor and used for independently controlling the rotating speeds of the first variable-frequency motor and the second variable-frequency motor so as to drive the primary crushing unit and the secondary crushing unit to do differential relative motion, and the screening unit is used for returning substandard materials to the primary crushing unit to be crushed again. Multi-stage differential crushing and intelligent closed-loop control are adopted, airflow separation and magnetic separation impurity removal are combined, efficient and energy-saving production is achieved through segmented melting and plasticizing, and the treatment efficiency and the purity of a finished product are improved through an automatic system.

The invention provides a screening machine for building waste recovery treatment, and relates to the technical field of building waste screening, the screening machine comprises a vibrating screen and a layer of screen mesh, the layer of screen mesh comprises a frame body, a first screen mesh and a second screen mesh, the first screen mesh and the second screen mesh are arranged in the frame body, a connecting piece is connected between the first screen mesh and the second screen mesh, and the first screen mesh is located above the second screen mesh; the inclination of the first screen relative to the horizontal plane is smaller than that of the second screen relative to the horizontal plane. The first screen and the second screen each comprise a plurality of spiral shafts rotationally connected to the frame and spiral blades arranged on the spiral shafts, the spiral blades are provided with protruding edges, and the multiple spiral shafts are driven by a driving assembly. The first layer of screen cloth is designed in a stepped mode, building waste falls onto the second screen cloth along the first screen cloth after being subjected to vibration screening on the first screen cloth, the spiral blades make contact with the stone crushing plate, the friction between the stone crushing plate and the spiral blades is increased through the protruding edges, overturning of the stone crushing plate is facilitated, and soil left on the plate face of the stone crushing plate is reduced.

The embodiment of the invention provides an intelligent maintenance device for hollow slab girder inner cavity operation, and relates to the technical field of bridge maintenance. The supporting leg controller is started, the crawler-type wheel sets are tightly jacked in a bottom plate of an inner cavity of the hollow slab girder through the foldable supporting legs, the driving wheels are driven by the wheel set control system, the driven wheels are driven by the driving wheels to rotate, the crawler belts are driven by the driving wheels and the driven wheels to move, and the movement of the crawler belts enables the maintenance device to move in the inner cavity of the hollow slab girder. Efficient and convenient polishing treatment operation can be conveniently carried out on the inner cavity of the hollow slab beam; a brush head connecting rod of the polishing assembly is adjusted through a telescopic connecting piece to adapt to the space size of the inner cavity; a grinding assembly disc is started, eight telescopic grinding brushes are distributed on the grinding assembly disc, and comprehensive and careful grinding operation on the inner cavity of the hollow slab girder can be achieved through rotation of the grinding assembly disc; construction waste such as powder generated by grinding enters a waste collecting box through a pipeline in the middle of the grinding brush via the interior of a disc of the grinding assembly; a series of high-definition cameras are arranged in the circumferential direction of the detection and evaluation disc, effect pictures of the inner cavity after polishing are collected and input into an evaluation system to automatically evaluate the roughness after polishing, and therefore the requirement for intra-cavity grouting maintenance is met. The device can greatly improve the quality and efficiency of polishing operation, so that reliable cohesiveness of an inner cavity of the hollow slab beam and a grouting maintenance material is guaranteed, and the shear bearing capacity of the hollow slab beam is improved.

The invention discloses a building waste brickmaking device and a using method, and relates to the technical field of brickmaking devices.The building waste brickmaking device comprises a supporting frame, a forming mold and a brick mold are slidably arranged on the inner side of the supporting frame, and the brick mold and the supporting frame are jointly provided with an oscillation assembly; the first transmission unit and the second transmission unit are arranged on the brick mold, the pushing rods are movably connected to the inner side of the brick mold, the first square plates are symmetrically installed at the ends of the pushing rods, the cams are rotationally connected to the side faces of the brick mold, the movable plates are slidably arranged on the inner side of the supporting frame, and the pressed blocks are installed on the upper portions of the movable plates. According to the device, through arrangement of the oscillation assembly, when side face oscillation and bottom oscillation act at the same time, materials are effectively extruded in the horizontal direction and the vertical direction, a more compact and uniform structure can be formed, and the vibration effect of the materials is improved; and the quality of bricks is improved.