4157 results about "Crushed stone" patented technology

The invention discloses a soil sampling device for environmental remediation, belongs to the technical field of environmental remediation, and aims to solve the problems that a spiral blade can destroy the in-situ structure and hierarchy of soil and influence the accuracy of a result, and broken stones on the surface layer of the soil can damage a spiral conveying blade. The soil sampling device comprises a shell, a handle is fixedly connected to the side wall of the shell, a first motor is fixedly connected to the top end in the shell, a threaded rod is rotatably arranged on the shell, one end of the threaded rod penetrates into the shell and is fixedly connected with the output end of the first motor, and a support sleeves the outer side of the threaded rod. According to the soil sampling device, gravel on the surface layer of soil can be cleaned, abrasion of the gravel to a drill bit is avoided, the service life of the sampling device is prolonged, meanwhile, soil of various depths can be sampled, the sampling amount of soil samples is ensured, and follow-up workers can conveniently and accurately detect specific components of the soil.

The invention belongs to the technical field of foundation bed leveling, and particularly relates to a gravel foundation bed leveling device and method suitable for a shallow water area. The gravel foundation bed leveling device comprises a leveling frame, a measuring device, an adjusting device and a scraper, the leveling frame comprises two longitudinal beams and a plurality of cross beams, and a leveling bin is formed between every two adjacent cross beams; the measuring device comprises four measuring rods detachably connected to the four corners of the leveling frame, and positioning equipment is installed at the top ends of the measuring rods. The adjusting device comprises four height adjusting screw rods and four screw sleeves, the four screw sleeves are arranged near the four measuring rods and fixedly connected into the leveling frame, and the height adjusting screw rods are connected into the screw sleeves in a one-to-one threaded mode and penetrate through the leveling frame; the two ends of the scraper in the length direction are detachably connected to the top faces of the cross beams on the two sides of the leveling bin in a pressed mode respectively. The novel leveling device is provided for manual leveling of the gravel foundation bed in the shallow water area, and the leveling precision of the gravel foundation bed in the shallow water area can be improved.

The invention discloses an ore crushing system and method based on controllable shock wave presplitting and intelligent sorting, the system comprises a shock wave ore crushing device and an intelligent ore sorting device, and the lower end of an upper stone crushing frame of the shock wave ore crushing device is slidably arranged in the upper end of a lower stone crushing frame; a plurality of stone passing holes are formed in wall plates of the upper stone crushing frame and the lower stone crushing frame; rotating shafts are arranged on the left side and the right side of the lower stone crushing frame, the rotating shafts are rotationally connected to the inner wall of the ore crushing bin, and an output shaft of the overturning mechanism is connected to the end of one rotating shaft; a reflecting cavity is formed in the lower end of the shock wave reflecting cover, a mounting hole is formed in the upper end of the shock wave reflecting cover, two electrode holders are arranged on the lower end face of the telescopic arm, the two ends of the metal wire are connected to the two electrode holders respectively, a force application ring is arranged on the lower portion of the telescopic arm in the circumferential direction, and the lower end face of the force application ring is used for abutting against the upper end face of the shock wave reflecting cover. The problems that in a traditional crushing process in the prior art, a fine crushing cavity is prone to being blocked, and crushing and grinding energy consumption is high are solved.

The invention belongs to the technical field of road construction, and particularly relates to a copper-doped tailing pavement base material as well as a proportion confirmation method and application thereof. The preparation method comprises the following steps: S1, preparing raw materials; s2, a compaction test method is adopted, and the void ratio of the compacted aggregate wrapped with the cement mortar is calculated; s3, according to the volume filling principle, the gravels form a basic framework, the void ratio of the gravels in the compaction state is measured, cement adhesive cement adheres to aggregate, the aggregate is filled in gaps of the framework formed by the gravels, and finally the blending proportion of the copper tailings, the gravels and the aggregate is determined by combining the composition mechanism and volume parameters of the mixture; and S4, calculating the using amount of the steel slag composite cementing material mucilage according to the thickness of the steel slag composite cementing material mucilage wrapping film and the specific surface area of the copper tailings. A skeleton filling theoretical method is adopted, the shrinkage effect of the filler in the skeleton is controlled, the cracking risk is reduced, and meanwhile the high strength is achieved.

The invention provides a finite element-based method for estimating pulling-out ultimate bearing capacity of a grouting screw anchor in gravelly soil, and relates to the technical field of civil structure engineering.A three-dimensional finite element model containing the grouting screw anchor and surrounding gravelly soil is established, model parameters cover the structure and material characteristics of the grouting screw anchor, and the grouting screw anchor and the surrounding gravelly soil are subjected to finite element modeling; a coordinate axis is established with the center of the anchor bottom as an original point for grid division, a stress concentration area is analyzed, principal stress is calculated to serve as critical bearing stress, vertical pull-out loads are applied step by step through a grouting pull-out test, a pull-out stress influence area is determined, soil stress of the area is analyzed, and soil binding power and friction force are calculated. And a grouting coefficient and a rock crack coefficient are generated, soil parameters are corrected, and the ultimate pulling bearing capacity of the grouting screw anchor is comprehensively obtained. According to the method, the pulling ultimate bearing capacity of the grouting screw anchor is accurately evaluated by establishing the three-dimensional finite element model and the graded loading experiment.

Disclosed in the present invention is a coiled tubing drilling downhole system convenient to move and position. The downhole system comprises a base plate, wherein four through slots run through the bottom of the base plate, four universal wheels are provided at the bottom of the base plate, handlebars are fixed to one side of the top of the base plate, a support frame is provided above the base plate, four square tubes are fixed to the support frame, positioning and stabilizing assemblies are respectively provided inside the four square tubes, a traction roller is rotatably connected inside the support frame, and a first electric motor is fixed to one side of the support frame. The present invention relates to the technical field of oil exploration. The coiled tubing drilling downhole system convenient to move and position, by means of providing automatic soil-ramming mechanisms, automatically rams soil and gravel divided to two sides of the mouth of a borehole, and, by means of cooperation and linkage with automatic soil division assemblies, prevents loose soil and gravel around the mouth of the borehole from slipping into the borehole, thereby improving the drilling efficiency.

The invention provides nano-silicon-based high-strength concrete and a preparation method thereof, and belongs to the technical field of concrete.The concrete is prepared from cement, mineral powder, fly ash, machine-made sand, first-class gravel, second-class gravel, an additive, nano-silicon or a nano-silicon composite modified material and water; the additive is a polycarboxylic acid water reducer and / or a polyether air entraining agent. According to the prepared concrete, the nano silicon material with good dispersity is added, so that the cement consumption can be reduced, the cost can be reduced, and the workability, the strength and the durability can be improved; and the preparation process is simple and convenient, is suitable for large-scale production, and can be widely applied to the engineering fields of high-rise buildings, bridges, tunnels and the like.

The invention discloses a high-speed railway roadbed structure design method based on dynamic stability. The method comprises the following steps: starting a design process: clearly designing load and control conditions; constructing a lumped parameter dynamic coupling model of the high-speed railway vehicle-track-roadbed layered structure; setting parameter input and verification are carried out on the model based on the design parameter system; solving a roadbed layered dynamic response result through the dynamic coupling model; judging critical conditions of the first design threshold and the second design threshold; various design parameters meeting the first design control threshold value and the second design control threshold value are substituted into the dynamic coupling model for recalculation, it is verified that various dynamic response rules meet design requirements, and finally the design target is completed. According to a typical high-speed railway subgrade structure subgrade bed surface layer graded broken stone and subgrade bed bottom layer coarse-grained soil filler type, a high-speed railway subgrade filler dynamic stability critical state judgment standard is established in combination with a long-term deformation development rule and hysteresis energy characteristics of different fillers under the action of train power; and the support is provided for the stability design of the high-speed railway roadbed structure.

The utility model relates to an ecological seawall structure, which belongs to the technical field of bank protection engineering and comprises a seawall foundation, the seawall foundation comprises a slope top and a slope body, and a retaining wall structure is arranged at the joint of the slope top and the slope body. An arc-shaped wave dissipation ridge is arranged at the position, spaced by a certain distance from the retaining wall structure, of the top end of the slope body, a cushion layer is laid at the position, located between the arc-shaped wave dissipation ridge and the retaining wall structure, of the top end of the slope body, and the cushion layer comprises a dry stone cushion layer and a broken stone cushion layer which are sequentially arranged from top to bottom. A first block stone cushion layer is laid at the position, located on the side, away from the retaining wall structure, of the arc-shaped wave dissipation ridge, of the top end of the slope body, extends to the bottom of the slope body and further extends outwards to be connected with a second horizontal block stone cushion layer, and a first concrete retaining wall is arranged at the joint of the first block stone cushion layer and the second block stone cushion layer. The accropode is laid at the top end of the second block stone cushion layer and located on the outer side of the first concrete retaining wall. The safety of the seawall can be effectively guaranteed, and the stability of the seawall structure is guaranteed.

The invention relates to a device and a method for simulating influence of underground water seepage on an existing tunnel and a freezing wall, the device comprises a test box body, a tunnel model, a seepage system, a data acquisition monitoring system, a saline water circulation cooling system and a saline water circulation heating system, the test box body is formed by splicing three box bodies with different structures; a formed space area is used for laying a test soil body and a broken stone hardcore; the tunnel model is arranged in the hollow area in the test box body; the seepage system is used for providing an underground water source for simulating seepage; the data acquisition monitoring system is used for monitoring and recording the soil pressure and displacement of the soil body around the tunnel model and the temperature change of the soil body near the freezing pipe; the saline water circulating cooling system is used for providing cooling capacity required by soil body freezing; and the saline water circulation heating system is used for providing heat required for pulling out the freezing pipe. The device can be used for simulating the influence of groundwater seepage on soil deformation and soil pressure around the existing tunnel, adjusting the seepage direction of groundwater and restoring more real groundwater seepage movement.

The invention discloses a broken rock granularity identification method based on machine vision. The method comprises the following steps: S1, obtaining a broken rock pile image in a quarry; s2, based on the lightweight edge segmentation model, combining a deformable convolution module fusing attention and an attention residual shrinkage unit, and replacing a maximum pooling layer with a cavity convolution layer to obtain an improved lightweight edge segmentation model; s3, segmenting the macadam pile image, and distinguishing macadam edges and backgrounds in the macadam pile image to obtain a macadam edge graph; s4, carrying out edge refinement on the broken stone edge graph by adopting a table look-up method, and carrying out area filtering by combining an area filter so as to refine edges and eliminate interference edges; and S5, carrying out macadam edge contour extraction on the macadam edge graph, calculating the area and perimeter of the macadam, and finally obtaining the granularity distribution condition of the macadam. According to the detection method, the calculation amount is remarkably reduced while high accuracy is kept.

The invention discloses lithotripsy equipment and a control method thereof. The lithotripsy equipment comprises a lithotripsy device, an optical tracking device, a display and control device and an ultrasonic imaging device, the lithotripsy device comprises a mechanical arm module, a shock wave module and a control module; the mechanical arm module and the shock wave module are both electrically connected with the control module, and the control module and the optical tracking device are both electrically connected with the display and control device. The ultrasonic imaging device comprises a handheld ultrasonic probe; the handheld ultrasonic probe is in communication connection with the display and control device; the mechanical arm module comprises a mechanical arm, the shock wave module comprises a shock wave generator, and the shock wave generator is arranged at the front end of the mechanical arm; and a plurality of optical reflection markers are arranged on the backs of the handheld ultrasonic probe and the shock wave generator. According to the lithotripsy equipment provided by the embodiment of the invention, the intelligent degree of the extracorporeal shock wave lithotripsy machine is improved, the extracorporeal shock wave lithotripsy treatment process is simplified, and the treatment positioning precision is improved.

The invention discloses a geological survey device, and belongs to the technical field of geological survey, the geological survey device comprises a base, the top of the base is provided with a collection frame and an electric lifting mechanism, and the top of the electric lifting mechanism is provided with a mounting plate; a plurality of connecting springs are fixedly connected between the collecting frame and the mounting plate, a sliding hole is formed in the top of the mounting plate, an adjusting plate is slidably mounted in the sliding hole, a linkage rod is hinged to the bottom of the adjusting plate, and the other end of the linkage rod is hinged to the top of the collecting frame; the sampling mechanism comprises a sampling barrel, a hollow shaft and a driving mechanism. Through the electric lifting mechanism and the sampling mechanism, stones can be crushed while soil sampling is achieved, the drilling speed and the feeding speed can be automatically adjusted according to feeding resistance, when the feeding resistance reaches a certain degree, the compressed gas storage tank is matched to improve the crushing effect on the stones, and the sampling efficiency is guaranteed.

The present disclosure provides a crushed stone extraction system, comprising a delivery apparatus and a hydrogel. The hydrogel comprises a first composition and a second composition. The first composition comprises at least one crosslinkable polymer. The second composition comprises at least one crosslinking agent. The crosslinkable polymer is configured to be delivered to a lithotripsy position by the delivery apparatus and then encapsulate the crushed stones. The crosslinking agent is configured to be delivered to the lithotripsy position by the delivery apparatus and then react with the crosslinkable polymer to form an elastic hydrogel body encapsulating the crushed stones. The delivery apparatus is configured to adsorb the elastic hydrogel body and then remove the crushed stones. The present disclosure can remove multiple or even all of the fine crushed stones that cannot be taken out by conventional means at a time, thereby reducing the pain of patients.

The utility model provides an offshore single pile foundation scour pit protection structure which comprises gravels filled in a scour pit formed by a seabed around a single pile foundation, gaps of the gravels are filled with solidified soil, and the paving height of the gravels and the paving height of the solidified soil are both lower than the surface of the seabed around the scour pit. The gravel and the solidified soil jointly form a hardened whole-block-shaped protection structure, the hardened whole-block protection structure formed by combining the gravel and the solidified soil serves as a protection structure of the scouring pit and is not prone to being washed away by high-speed water flow, and the paving height of the gravel and the paving height of the picture are both lower than the seabed surface around the scouring pit. And secondary scouring can be obviously reduced, and the subsequent maintenance construction time and cost are saved.

The invention aims to provide a detection device and a detection method for gravel pile diameter detection. According to the detection device and the detection method, the distance between transducers mounted on the two sides of a pile pipe and the center of the pile pipe is determined; when gravel pile construction is carried out, the energy converter is started, vibration blanking is started when the pile pipe sinks to the target elevation, and a pile body of a gravel pile is formed; wave signals fed back by the transducers are received on an analysis system, and the pile body diameter of the gravel pile is calculated based on the wave signals and the distance between the two transducers and the center of the pile pipe. Therefore, the pile diameter can be detected in real time along with lifting of the pile pipe, constructors can conveniently and visually master pile diameter information in time, and construction quality is improved.

The invention relates to a concrete composition, concrete as well as a preparation method and application of the concrete. The concrete composition comprises the following components: coal gangue aggregate, a gel material and a water reducing agent, the coal gangue aggregate comprises crushed coal gangue, a coarse coal gangue material and coal gangue stone powder, and the average particle size of the coarse coal gangue material is larger than that of the coal gangue stone powder and smaller than that of the crushed coal gangue; the gel material comprises slag, gypsum and carbide slag. According to the concrete composition, the coal gangue of different grades is adopted as the aggregate and compounded with the gel material and the water reducing agent to prepare the concrete, all the raw materials have a synergistic effect, the durability, workability, crack resistance and other performance of the concrete are improved, the production cost is reduced, and the requirement of coal mine construction for high-performance concrete is met.

The invention relates to the technical field of water conservancy projects, particularly discloses a test device and method for simulating lateral water flow scouring of a slope protection circulating water tank, and aims to solve the problem that in the prior art, slope protection scouring of different gradients cannot be simulated at the same time, and erosion sediment particles cannot be effectively collected. According to the technical scheme, the device comprises a circulating water tank, a multi-stage flow guide box, a slope-adjustable gravel washing tank, a slope-adjustable plant maintenance tank, a sediment collecting area, a high-speed shooting device and the like; by adjusting the gradient of the multi-stage flow guide box and the gradient of the broken stone washing groove, accurate control over the water flow state and the slope of the slope protection is achieved; a multi-stage filter screen and water baffle technology is adopted in the sediment collecting area, and erosion sediment is effectively collected and analyzed; according to the invention, not only can the scouring process of the broken stone revetment and the ecological revetment be simulated, but also the erosion resistance of the revetment can be accurately reflected, and theoretical and technical support is provided for ecological revetment engineering design and disaster prevention and reduction; the device is simple and convenient to operate, accurate in data collection and high in test efficiency, and can meet various requirements in scientific research and engineering practice.

The invention relates to the technical field of cables, and discloses a wear-resistant tensile composite multifunctional mobile high-voltage mining cable which comprises a sheath layer, a protective sleeve is arranged in the sheath layer, a wire is fixedly connected in the protective sleeve, and a buffer assembly is fixedly connected to the outer wall of the sheath layer; through the arrangement of the bidirectional spiral frame, the inner wall of the sheath layer and the bidirectional spiral groove of the middle layer are supported in an embedded mode, and when the sheath layer is damaged by external force, a rigid framework of the spiral frame can immediately block the direct effect of external friction on the inner side protection sleeve; in the scene of puncture of sharp objects such as underground gravel, the staggered grid structure of the spiral frame can effectively disperse the puncture force, and the sharp objects are prevented from deeply invading into the cable through deformation buffering; when the cable is subjected to dynamic bending stress, the bidirectional spiral frame can avoid the risk of internal structure fracture caused by repeated bending, so that the anti-damage capability and the structural stability of the cable under complex working conditions are improved.

The invention relates to the field of pole tower pile foundation protection, and discloses a replaceable pole tower concrete pile foundation protection device which comprises a pole tower pile foundation embedded in underwater sludge; the foundation pit is arranged on the underwater sludge, the depth of the foundation pit reaches the middle position of the tower pile foundation base, and the foundation pit is filled with broken stones to form a broken stone hardcore; the mounting plates are arranged on the pole tower pile foundation; the protection plate is arranged on the mounting plate and is rotatably arranged on the mounting plate; and the protection plates can automatically rotate according to the strength and direction of water flow, and are matched with the anchoring effect of the inserting rods, so that the gravel hardcore is effectively stabilized, the gravel layer is prevented from being lost, and the stability and anti-scouring capacity of the pile foundation are further enhanced. Through the design of the clearing rod, sediments on the outer wall of the tower pile foundation can be regularly cleared away, unsmooth water flow or uneven scouring caused by sediment accumulation is avoided, and the situation that the service life of the pile foundation is shortened due to biological corrosion is prevented. And through the effective sliding and scraping effects of the removing rod, the corrosion influence of attachments on the pile foundation can be reduced, and smooth water flow is ensured.

To provide a deep well filtering structure that effectively prevents the subsidence and collapse of the well wall. [Solution] The deep well filtration structure of this invention includes a surface loess layer 1 and a well channel 7, with a concrete well side 8 poured onto the surface of the surface loess layer, a reinforced concrete permeable pipe and a reinforced concrete solid pipe 10 installed in sequence inside the well channel, a well pipe pallet 6 placed at the bottom end of the well channel, and below the surface loess layer, in sequence, a gravel-mixed loess layer 2, a gravel layer 3, a crushed stone-mixed loess layer 4 and an underground loess layer 5, and a clay ball-filled sealing layer 9 filled between the surface loess layer, the gravel-mixed loess layer and the reinforced concrete solid pipe.

The invention provides a construction method for a gravel pile of a thick embankment layer, which comprises the following steps of: in a field after backfilling and flattening gravel materials, starting a down-the-hole hammer to lead a whole riprap layer above a hole in a construction area, lifting a drill bit after a steel casing follows up to the bottom of the riprap layer, and backfilling and pulling out a sleeve to complete the hole lead; pile forming construction of the gravel pile is completed through material supplementing; and after the pile machine moves, a cushion layer is laid on the gravel pile, and the compactness effect of the gravel pile is detected through a dynamic penetration method. The down-the-hole hammer and the steel pile casing are combined, so that the interior of the hole is kept stable, the time of repeated drilling of the down-the-hole hammer and auxiliary sinking of the pile casing by a vibratory hammer is saved, the hole forming construction progress is accelerated, and the down-the-hole hammer pile casing follow-up construction method can achieve the efficiency of forming a pile and leading 5-9 holes in one day.

The invention provides a surrounding rock back break monitoring and early warning system for a curved tunnel, which relates to the technical field of curved tunnel excavation monitoring and comprises an acquisition module, a tunnel model construction module, a back break analysis module and an evaluation module, the collecting module is used for obtaining the position of a pre-buried blasting point of each area, the preset blasting strength and tunnel inner wall surrounding rock damage data in the blasting excavation process, and the tunnel model building module is used for building a bent tunnel blasting AI analysis model. A blasting impact strength data set, a blasting gravel impact strength data set and a surrounding rock surface strength data set are established, and the over-excavation and under-excavation analysis module is used for constructing a blasting impact influence coefficient Cb, i, a blasting secondary impact influence coefficient Cimpact, i and a surrounding rock surface strength excavation influence coefficient Kh, i of the ith area. According to the system, the collision of the inner wall of the curved tunnel is detected and analyzed twice, the over-excavation and under-excavation conditions are further detected and evaluated, and a corresponding strategy is generated.

The utility model relates to the technical field of macadam paving for municipal road construction, and discloses a macadam paving device for municipal road construction, which comprises a support frame and a paving mechanism, the paving mechanism comprises a pouring frame and a scraper blade, the left side of the pouring frame is fixedly provided with a filter grating, and the left side of the pouring frame is fixedly provided with a motor; mounting plates are fixedly mounted on the front side and the reverse side of the left end of a material pouring frame correspondingly, through the arranged paving mechanism, gravel slides down along the material pouring frame, large gravel can be intercepted by a filtering grid, and the problem that paving is uneven due to the fact that the large gravel falls on the road surface is avoided; a worker can clean broken stones blocked on a filtering grid in real time by sticking the worker on a standing operation frame, the height between a scraper and the ground can be adjusted by adjusting stretching and retracting of a spring in a telescopic groove, the broken stones can be conveniently paved with different thicknesses, redundant broken stones can be pushed to the two sides through a V-shaped stone scattering plate, and the broken stones can be conveniently spread. Redundant gravel is prevented from being accumulated in the middle, and the flexibility of gravel paving is improved.

The utility model relates to the technical field of hydraulic engineering construction machinery, and discloses a canal trench ditching device, which comprises a chassis structure, a trench digging mechanism, a trench digging mechanism, a trench digging mechanism, a trench digging mechanism, a trench digging mechanism and a trench digging mechanism, wherein the chassis structure is used for realizing operation on soft and hard alternate soil layers or undulating surfaces; the rotary tillage structure is mounted at the bottom of the chassis structure and used for crushing hard soil on the surface layer and removing weeds and broken stones to form a uniform and loose plough layer; the ditching structure is mounted at the bottom of the chassis structure, is positioned behind the rotary tillage structure and is used for realizing excavation of grooves with different depths; and the tamping structure is installed at the bottom of the chassis structure and located behind the ditching structure, comprises a soil shifting shovel for leveling soil discharged from the two sides of the ditching structure, and tamps the bottom of the groove and the side slope through vibration compaction of a plane tamping plate and a slope tamping plate. By integrating the self-adaptive terrain adjusting system and the combined type grooving mechanism, topographic relief and soil states can be monitored in real time, the ditching depth, gradient and section form can be dynamically adjusted, and one-time forming of a groove is ensured.

The invention relates to the technical field of underground mining methods, and provides a thin vein group step-by-step efficient continuous stoping method which is used for collecting ore bodies in an ore block, the ore block comprises at least two ore bodies, the ore bodies are vertically arranged, a stone clamping layer is arranged between every two adjacent ore bodies, and the first ore body, the stone clamping layer and the second ore body in the ore block are sequentially arranged. Comprising the following steps that S10, a first ore body is mined, and a first goaf is formed; s20, blasting the stone clamping layer part, and filling the first goaf with broken stones obtained by blasting; and S30, a second ore body is mined. By means of the technical scheme, the problems that in the prior art, the mining efficiency of the steeply-inclined thin vein group containing the multi-layer clamping stone is low, and large-scale automatic mechanical equipment is difficult to apply are solved.

This invention relates to a construction method for driving piles using a vibratory driven pile unit. The original walking pile frame is replaced with a crawler crane. Utilizing the flexible movement of the crawler crane, the machine can move immediately after driving one pile to drive the next. At this time, crushed stone can be added to the previous pile, and then the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. The crawler crane is equipped with an adjustment frame, which is fixed at the bottom by a bottom-fixing cylinder. The mast adjusts the upper position of the pile frame, and the adjustment frame adjusts the lower position of the pile frame, ensuring the verticality of the crushed stone piles during driving and extraction. During use, the mast adjusts the position of the pile frame, and the vibratory lifting mechanism drives the hoisting rope to move the vibratory hammer up and down through the slide frame for driving or extracting piles.

To provide a crusher capable of controlling an object to be crushed in a crushing chamber to be in a constantly filling state by reducing the rotation speed of the crushing chamber when a filling rate of the object in the crushing chamber is low.SOLUTION: A crusher 1 for crushing stones by rotating a crushing unit comprises: a sensor 50 that measures a raw stone 2 thrown into a crushing chamber 11b; a crushing state determination unit 42 that determines a filling stage of the raw stone 2 in the crushing chamber 11b on the basis of measurement information of the measured raw stone 2; and a control unit 40 that controls an IP motor 20 so as to reduce the rotation speed of the crushing unit when it is determined that the filling state of the raw stone 2 is an unfilling state.SELECTED DRAWING: Figure 1

The invention discloses a large-scale planting rotary tillage fertilizer applicator, and relates to the technical field of agricultural tools, the large-scale planting rotary tillage fertilizer applicator comprises a rack, a transmission box is mounted at the upper end of the rack, transmission shafts are mounted at two ends of the transmission box, protection plates are mounted at two ends of the rack, and a driving shaft is rotatably mounted between the two protection plates; a plurality of rotary tillage blades are detachably mounted on the surface of the driving shaft, a stone crushing box is mounted at the lower end of the rack in front of the driving shaft, a partition plate is mounted in the stone crushing box, a crushing assembly is mounted between the partition plate and the stone crushing box, a plurality of arc-shaped sieve plates are mounted at the front end of the partition plate at equal intervals, and a stirring assembly is mounted in the stone crushing box above the arc-shaped sieve plates. Soil is turned over for the first time by arranging the soil turning roller, stone blocks are stirred into the stone crushing box through the arc-shaped sieve plate by using the stirring assembly, the two stone crushing rollers in the stone crushing box crush the stone blocks, the crushed stone blocks fall on the soil to change the soil structure, and the situation that the rotary tillage blades are abraded by large stone blocks is avoided.

The invention discloses a broken stone screening device for a loader, and relates to the technical field of screening equipment, the broken stone screening device comprises a bucket connected to a lifting arm of the loader and a screen drum communicated to the back of the bucket and used for material separation, and screen holes used for filtering materials are formed in the half circumferential surface, close to the bottom of the bucket, of the screen drum; reinforcing frames are fixed to the inner side of the screen drum at equal intervals. According to the broken stone screening device for the loading machine, the loading machine drives an opening of the bucket to rotate upwards, materials are guided into a channel between the screen drum and the rotary drum, meanwhile, the driving mechanism drives the stone inlets which are distributed in a staggered and equal-included-angle mode through the rotary drum to scrape broken stones, and the materials can be conveniently screened from multiple channels; when the dispersing frame at the front end of the middle shaft rod and the material stirring rod at the tail end of the middle shaft rod move in the wave-shaped fluctuation cavity, the dispersing mechanism can disperse shoveled or extruded materials in a reciprocating mode through reciprocating fluctuation, and it is ensured that the device can efficiently screen clustered materials and broken stones.