3711 results about "Silo" patented technology

The invention provides a feeding bin intelligent management method and system based on self-adaptive control, and relates to the technical field of feeding bins, and the method comprises the steps: collecting the data of a feeding bin group through multiple sensors, inputting the data into a prediction model to obtain a state prediction result, and correcting the deviation through a Kalman filtering algorithm; a reinforcement learning environment is constructed based on the corrected data, and an optimal control strategy is obtained through deep Q learning network training; the distributed control system generates a control instruction sequence based on a consistency protocol and a model prediction control algorithm to realize cooperative control. According to the invention, intelligent management of the stock bin group is realized, the control precision and the system stability are improved, and the manual intervention cost is reduced.

The invention provides an intelligent maintenance method and system for the wall of a squat silo, and the method comprises the steps: applying controllable environment parameters to a concrete test block group with the same proportion through an environment simulation device, and obtaining test block deformation data, moisture content data and stress data; performing time sequence correlation mapping on the test block deformation data, the moisture content data and the stress data and environmental parameters to obtain a maintenance decision data set; acquiring a real-time environment vector through a sensor network deployed on the site of the squat silo; inputting the real-time environment vector into a maintenance decision model, and generating a spraying control instruction by matching the maintenance decision data set; and driving a spraying system to execute operation according to the spraying control instruction, and dynamically correcting spraying parameters based on moisture monitoring data. According to the method, through data-driven intelligent maintenance decision and dynamic closed-loop control, the crack risk of the wall of the squat silo is remarkably reduced, meanwhile, water resource consumption is reduced, and double breakthrough of maintenance quality and resource efficiency is achieved.

The present invention discloses a sintering production line, comprising: a kiln, a kiln car conveyor line, a material receiving device, a material feeding conveyor line and a bowl loading and unloading device. The kiln car conveyor line comprises a plurality of bowl-carrying kiln cars that circulate along a closed-loop conveying route. The conveying route comprises a sintering section and a loading and unloading section. The kiln is arranged in the sintering section for heating and sintering the sagger. The material receiving device is arranged on the upstream side of the loading and unloading section for collecting the sintering material. The material feeding conveyor line is arranged on the downstream side of the loading and unloading section for loading the empty sagger into the powder material to be sintered. The bowl loading and unloading device is used to move the sagger between the bowl-carrying kiln car, the material receiving device and the material feeding conveyor line. The sintering production line of the present invention has a high degree of automation, avoids the high-intensity operation of the staff in a harsh environment, and improves the efficiency.

The invention belongs to the technical field of machining equipment feeding, and particularly relates to punch press feeding equipment with an adjusting function, which comprises a material distribution bin and a punching lathe arranged on one side of the material distribution bin, and is characterized in that an outer frame bracket is arranged at the top of the material distribution bin in a sliding manner, a material frame is arranged in the outer frame bracket, and a material guide plate is arranged in the material distribution bin in a sliding manner; a material guiding plate is arranged on the base, a discharging adjusting plate is arranged at the top of the material guiding plate, a material distributing plate is arranged at the top of the discharging adjusting plate, a supporting plate is arranged at the bottom of the material guiding plate, and a mounting block is arranged on one side of the material guiding plate. And through arrangement of structures such as a mounting block and a detection block, the diameter and length of the bar can be detected, so that the stamping quality of the bar is improved, the bar can be cooled through arrangement of a water pipe and a water tank, and workers are prevented from being burnt by generated high temperature.

The invention relates to the technical field of operation control, in particular to an unattended operation crucible loading and unloading operation control system and method based on visual processing, and the method comprises the following steps: monitoring a static accumulation value in a graphite powder fluidization conveying process in real time through a distributed static sensor; when the static accumulation value exceeds a safety threshold value, pulse type ion wind neutralization treatment is triggered, and a static balance material flow is generated; the dynamic alignment deviation of the stock bin and the crucible opening is calculated; the stepping angle and the rotating speed of a spiral auger in the stock bin are controlled based on the dynamic alignment deviation, and an axial vibration field is synchronously applied in the discharging process; the position of an air gap in a material is predicted based on a convolutional neural network, and a vacuum negative pressure value is dynamically adjusted to form a gradient suction mode. According to the device, the risks of powder agglomeration, conveying pipeline blockage or electrostatic discharge caused by electrostatic accumulation are effectively prevented, the safety of the conveying process is ensured, and meanwhile, the flowing stability of graphite powder is optimized.

The invention discloses a self-healing concrete intelligent preparation method and system based on a dynamic optimization algorithm. The method comprises the following steps: S1, feeding: feeding materials to a premixing module by a raw material bin and a repairing agent carrier storage bin; s2, premixing: monitoring the water content of the aggregate fed into the raw material bin in real time by a premixing module, and dynamically adjusting the rotating speed of the premixing module through the water content; s3, gradient stirring: after premixing, feeding the materials into a gradient stirring module, and sequentially stirring; s31, firstly entering a low-speed paddle for stirring, monitoring the stirring resistance moment and the slurry viscosity distribution in real time, and dynamically adjusting the rotating speed of the paddle according to the torque-viscosity relationship; s32, performing ultrasonic homogenization on the materials subjected to low-speed stirring, monitoring the dispersity of each substance in low-speed stirring in real time through an identification camera, calculating the concentration gradient, monitoring the particle size distribution of a carrier at a discharge port of an ultrasonic homogenizer to obtain the particle size of a target aggregate, and dynamically adjusting the ultrasonic frequency according to the particle size of the target aggregate to obtain the target aggregate. And dynamically adjusting ultrasonic power and action time according to the concentration gradient.

The invention provides a grain pile form dynamic monitoring method based on an intelligent visual system, and the method comprises the steps: extracting a speed field and a direction field of grain flow motion from video data in a grain flow falling process through employing an optical flow field analysis method, and obtaining the initial information of a grain flow track; according to the track change information, the initial diffusion range of the grain flow at the bin bottom is analyzed, whether the diffusion mode is uniform or not is judged, and if diffusion is not uniform, the corresponding area is marked as an irregular diffusion area; a dynamic diffusion model is established based on the track change information, the dynamic diffusion model is adopted to process an irregular diffusion area, and the accumulation speed and the form change trend of the grain pile are predicted in combination with the speed field and the direction field of grain flow movement; and according to the predicted grain pile stacking speed and form change trend, operation parameters of the conveying equipment are adjusted, and the operation parameters comprise the speed and angle of a conveying belt.

The invention discloses a suspension cable soft platform formwork structure for silo conical shell construction and a construction method, and relates to the technical field of silo conical shell construction.The formwork structure comprises a suspension cable net system, a formwork supporting system and an intelligent monitoring system.The suspension cable net system comprises main cables and auxiliary cables which are orthogonally arranged; the main cables are radially distributed along the silo top of the silo body, and the auxiliary cables are annularly arranged along the silo top of the silo body in a closed mode. The formwork supporting system comprises an auxiliary scaffold board and a full supporting frame which are arranged in the suspension cable net system, the upper portion of the full supporting frame is of a circular truncated cone structure forming a silo conical shell, a conical shell side wall mold is arranged on the arc face of the circular truncated cone structure, and a conical shell silo top mold is arranged on the upper bottom face of the circular truncated cone structure. The intelligent monitoring system comprises a load sensor and a tilt angle sensor. According to the method, through dynamic coupling of the orthogonal suspension cable net and the modular supporting system and combination of an intelligent monitoring system, precise control over the construction process is achieved, the steel consumption is reduced, the construction period is shortened, and safety and adaptability are improved.

The invention relates to the technical field of mine solid waste treatment and carbon dioxide sealing and storage, and particularly discloses a system and a method for sealing and storing carbon dioxide by utilizing coal-based solid waste and mine water to prepare slurry. The system comprises a cement bin, a gangue bin, a coal ash bin, a gasified slag bin, a mine water storage tank, a stirring reaction kettle, a carbon dioxide storage tank, a slurry temporary storage tank, a vacuum pump and a slurry pump, and the stability and adsorption efficiency of carbon dioxide fixation are improved in the mode that coal-based solid waste, mine water and carbon dioxide are subjected to chemical reaction and physical adsorption; meanwhile, the prepared backfill slurry has high-strength anti-pressure ability, the stability of the backfilled underground goaf is better improved, further, coal-based solid waste and mine water are utilized for waste recycling, and the carbon dioxide storage cost is reduced.

The invention discloses a material detection method based on fusion of a laser radar and a millimeter wave radar, and relates to the field of material monitoring, and the method comprises the following steps: obtaining three-dimensional point cloud data of the surface of a material in a stock bin through the laser radar, obtaining distance measurement data of the material in the stock bin through the millimeter wave radar, and inputting the two data into a fusion processing module; and a preset time synchronization mechanism is adopted, weight coefficients of the two types of data are dynamically adjusted based on environmental parameter changes, fused material level information is obtained, and the fused material level information is transmitted to a monitoring terminal to be displayed and recorded. The method provided by the invention effectively solves the problems of inaccurate measurement and slow response of a traditional detection system in severe environments such as dust and moisture, and has the advantages of high precision, strong real-time performance and wide adaptability.

The invention relates to the technical field of plastic product recycling, and discloses a plastic product pretreatment recycling device which comprises a crushing box, a feeding bin arranged at the top of the crushing box, a discharging bin arranged on one side of the bottom of the crushing box, an inclined baffle arranged on the inner side of the crushing box and a circulating crushing unit arranged in the crushing box. And the circulating crushing unit comprises a crushing part arranged in a crushing box. According to the plastic product pretreatment and recovery device, a first connecting shaft rotates, a rotating shaft is driven to rotate, a side plate is driven to rotate, an extrusion plate is driven to rotate, an inclined baffle enables plastic bottles to fall onto a smashing roller, the extrusion plate slides on the outer side of a first cam when rotating, and the extrusion plate moves downwards under the action of the first cam; and the extrusion rods slide on the inner side of the extrusion cavity, the extrusion springs are stretched, and the extrusion plates extrude the plastic bottles towards one side of the crushing roller, so that the plastic bottles are convenient to crush, the plastic bottles are prevented from jumping and being difficult to crush during crushing, and the crushing efficiency is improved.

The present invention provides a coal feeding control method and system for a small pulverized coal silo, the method includes: acquiring a boiler load increase signal, and determining the target function F(t) for boiler load control obtaining the current coal mill output signal B(t), where B(t) is the fuel quantity signal at the outlet of the coal mill that changes over time from the start time; comparing B(t) with F(t): if B(t) cannot meet the fuel quantity requirements of F(t), activate the small pulverized coal silo connected to the boiler; otherwise, the small pulverized coal silo remains inactive; determining the coal feeding signal f(t) for the small pulverized coal silo, and further determining the coal feeding control signal f(t) for the small pulverized coal silo; controlling the small pulverized coal silo to feed coal to the boiler, quickly changing the combustion rate in the furnace, and increasing the boiler load.

The invention relates to the technical field of saline-alkali land improvement, in particular to a moderate and severe salinization cultivated land alkali-reducing fertilizing cultivation device and method.The device comprises improved cultivation equipment, a storage discharging box is fixedly installed on the improved cultivation equipment, and the device further comprises a discharging control bin, the discharging control bin is further provided with a plurality of discharging ports, and each discharging port is provided with a sliding plugging plate in a sliding mode. The improved control mechanism comprises a conductivity sensor, a displacement control assembly and a discharging assembly; according to the alkali-reducing fertility-improving cultivation device and method for the moderately severe salinization cultivated land, for the same improved area, if the requirement for increasing or reducing the modifying agent locally exists, waste of the modifying agent can be avoided, and the effect of improving the soil can be improved by adjusting the amount of the intermittently discharged modifying agent.

The invention discloses an earth and rockfill dam material space autocorrelation detection and sampling point optimization method and system based on sampling simulation, and the method comprises the steps: collecting the whole-section surface basic data of the compaction quality of a test bin surface: selecting a construction bin surface which is similar to the working condition needing the compaction quality evaluation as the test bin surface, discrete random sampling points are arranged in a uniform point distribution mode, the compaction quality of the test bin surface is detected, and related basic data are collected; detecting the spatial autocorrelation of the earth and rockfill dam material by using a Monte Carlo method; detecting the significance of the spatial autocorrelation of the earth and rockfill dam material by comparing the difference between the accuracy rates of no statistical misjudgment when the spatial autocorrelation of the earth and rockfill dam material is considered and not considered; and reasonably optimizing discrete random sampling point arrangement by utilizing an aggregation state fuzzy comprehensive evaluation model considering multi-source information fusion. The method provided by the invention is more visual, and can truly reflect the obvious influence of the earth and rockfill dam material space autocorrelation on the characterization precision of the compaction quality.

The utility model discloses a squat silo multipoint discharging device, which relates to the technical field of bin discharging and comprises a distributing bin arranged at a feeding port above a squat silo, a central blanking pipe is arranged at the bottom of the distributing bin and communicated with a cavity of the distributing bin, and the distributing bin is provided with a discharging port. A discharging port of the center discharging pipe right faces the middle position in the squat silo, the center discharging pipe is used for laying the bottom of the squat silo, a plurality of side elephants are further arranged on the side wall of the material distribution bin in a downward inclined mode around a shaft and communicated with a cavity of the material distribution bin, the free ends of the side elephants extend towards the side wall of the squat silo, and the center discharging pipe is arranged on the side wall of the material distribution bin. A plurality of blanking openings are formed in the side articulated chutes in the length direction, a first pneumatic valve and a second pneumatic valve are arranged at the positions where the center blanking pipe and the side articulated chutes communicate with the distributing bins correspondingly, and the center blanking pipe and the side articulated chutes are used for blanking in a matched mode, so that materials are evenly stacked; and the problems of serious material grading and unbalance loading of the silo wall existing in the original single blanking point are reduced.

The invention relates to the technical field of discharging conveying, in particular to a grinding equipment discharging conveying device with a screening function and a using method of the grinding equipment discharging conveying device. The grinding equipment discharging conveying device comprises a conveying pipe, a feeding bin arranged at one end of the conveying pipe and a discharging opening formed in the other end of the feeding bin; a rotating shaft is rotationally arranged in the conveying pipe, and a spiral blade is fixedly connected to the outer part of the rotating shaft; the spiral blade comprises a material receiving plate fixedly connected to the rotating shaft, a screen fixedly connected to one side of the material receiving plate, a cavity formed between the material receiving plate and the screen, an opening formed in the material receiving plate and a bucket fixedly connected to one side of the opening. The screening device has the beneficial effects that in the conveying process of the materials through the spiral blades, the materials are screened through the screen, large-particle materials are screened to the interior of the cavity, the purpose of preliminary screening of the materials in the material conveying process is achieved, and therefore the screening pressure of follow-up screening equipment is relieved, and the production efficiency is improved.

The present invention relates to a system and method for preventing material mixing during automatic belt feeding of steelmaking, belonging to the technical field of steelmaking. The technical solution is as follows: when materials enter a high-level silo (16) from an underground silo (2) through a belt scale A (3), a No. 1 belt (4), a No. 2 belt (6), a No. 3 belt (7), a No. 4 belt (8), a belt scale B (9) and a discharge trolley (14), the belt scale A (3) and the belt scale B (9) weigh the mass of the materials passing through, and a feeding PLC (1) compares and calculates the two. When the mass data of the materials weighed by the belt scales A and B differ by more than 10%, an alarm is issued and the machine is automatically shut down, thereby preventing material mixing during automatic feeding. The beneficial effects of the present invention are: low investment cost, strong anti-interference ability, and the function of detecting material mixing phenomena in each process during the automatic feeding process and taking corresponding measures to avoid material mixing in the high-level silo.

The invention discloses an automatic transportation-distribution device and method for rock-fill dam panel concrete, the device adopts a spiral stirring roller to continuously stir concrete, prevent initial setting or bleeding and maintain slump stability, the bottom of a stock bin is designed to be an adjustable concrete discharge port in the rotation direction, the concrete is automatically discharged through gravity, and the concrete is automatically conveyed and distributed. Precise putting is realized; automatic panel distribution is achieved through belt conveyor conveying and rail moving, and a rail system parallel to a panel is adopted as a moving system, so that the distribution system can flexibly move in the length direction of the panel; according to the method, the discharging efficiency of a chute and horizontal material distribution is quantified, the slump of concrete, the inclination angle of the chute and the friction coefficient are considered in the conveying capacity of the chute, geometric parameters and power parameters of a belt conveyor are considered in the discharging efficiency of the horizontal material distribution, and the discharging condition of the concrete is monitored in real time; parameters of the chute and the belt conveyor are automatically adjusted through an algorithm, and smooth connection of transportation and paving is ensured.

The present invention relates to a modular support system for a silo concrete structure, comprising: an upright central column; a plurality of supporting brackets arranged on the top of the central column, the installation position of which can be adjusted according to the height of the silo concrete structure; a lower connecting plate placed on the supporting bracket, the lower connecting plate being annular and having an annular connecting slot on the top; a plurality of truss units supported between the silo concrete structure and the central column, the ends of which are close to the central column being provided with connecting protrusions, the connecting protrusions being clamped into the connecting slots of the lower connecting plate; an upper connecting plate buckled at the ends of the truss units close to the central column, being fastened to the lower connecting plate and clamping the ends of the corresponding truss units. The modular support system of the present invention connects the truss units by arranging the lower connecting plate and the upper connecting plate, and the truss units are connected to the lower connecting plate by a clamping connection, so that the support system of the present invention has a wide range of applicability and can realize fully assembled construction for silos of different diameters.

The utility model provides a modular unit and a modular assembly type multi-cavity corrugated steel plate silo, and belongs to the field of steel plate silo storage. The problems that a traditional assembly type granary is poor in sealing performance, poor in storage effect and difficult to assemble, disassemble and transform, and a single-layer assembly type granary is poor in heat preservation effect are solved. Comprising splicing profile steel I and splicing profile steel II which are located at the ends of the two sides and at least one piece of in-arc profile steel between the splicing profile steel I and the splicing profile steel II, and the splicing profile steel I and the splicing profile steel II are detachably connected through two matched lug plates. The stiffening steel plate on the splicing profile steel I is sequentially connected with the stiffening steel plate of at least one arc inner profile steel and the stiffening steel plate of the splicing profile steel II through the cover plate I. The arc-shaped steel plates are arranged inside, outside or in the middle of the module units. Through the measures of factory prefabrication, multi-cavity segmentation, on-site modular installation, profile steel stiffening, inner filling of heat preservation and heat insulation materials and the like, the overall strength, construction convenience and heat preservation and moisture retention of a traditional single-layer / single-cavity corrugated steel side wall are enhanced.

The utility model provides a material sucking and discharging crown block for graphitization. The material sucking and discharging crown block for graphitization comprises a first bridge frame moving in the X direction, a second bridge frame arranged on the first bridge frame and moving in the Y direction, a first material bin arranged on the side of the first bridge frame, a second material bin arranged on the second bridge frame and a dust remover located on the side of the second material bin. The two sides of the second stock bin in the X direction are connected with material suction pipes, the bottom of the dust remover is connected with a discharging pipe, the bottom of the second stock bin is communicated with the discharging pipe through a connecting pipe, a dust collecting pipe is connected between the discharging pipe and the dust remover, a feeding port is formed in the top of the first stock bin, and a discharging port is formed in the bottom of the first stock bin. The bottom of the discharging pipe is matched with the feeding port. The movable bridge frame in the X direction and the Y direction is integrated, and the two material suction pipes are integrated on the bridge frame, so that the equipment space is more compact, and the space occupied by operation is reduced.

The invention relates to the field of strip steel material coating liquid, and discloses production equipment for strip steel material surface coating liquid, which comprises a support table, a reaction kettle is fixedly connected in the support table, the bottom end of the reaction kettle is fixedly connected with a discharge port, and the upper surface of the support table is fixedly connected with a liquid tank. A first supporting frame is fixedly connected to the upper surface of the supporting table, a solid stock bin is fixedly connected to the interior of the first supporting frame, a conveying pipe is fixedly connected to the bottom end of the solid stock bin, a feeding port is fixedly connected to the outer wall of the conveying pipe, and a first motor is arranged at one end of the conveying pipe. Through vibration of the vibration bin and the sieve plate thereof, material caking is effectively prevented, it is ensured that materials smoothly and continuously flow into the reaction kettle, blockage and feeding interruption are avoided, dispersion uniformity and dissolution and reaction efficiency of the materials are improved, stirring and mixing time is shortened, and energy consumption is reduced.

The invention discloses a sand mixing machine with adjustable sand output flow rate, which relates to the field of sand mixing, and comprises a bottom plate, the top of the bottom plate is evenly provided with supporting feet, the top of the supporting feet is fixedly connected with a placing platform, the top of the placing platform is fixedly connected with a sand mixing bin, the inner wall of the sand mixing bin is rotatably connected with a sand grinding mechanism, the top of the sand mixing bin is fixedly connected with a lower slide plate, the bottom of the sand mixing bin is fixedly connected with the sand output mechanism, the outer surface of the sand mixing bin is fixedly connected with an auxiliary mechanism, the end of the bottom plate close to the sand output mechanism is fixedly connected with a sand collecting plate, the top of the bottom plate is fixedly connected with a main motor, the output end of the main motor is fixedly connected with a speed changing device, after the sand and stone raw materials are poured into the sand mixing bin, the main motor will drive the sand grinding mechanism to rotate through the speed changing device, and then mix the raw materials, and the rotation will stop after mixing for a period of time, at which time the auxiliary mechanism will turn over the raw materials, and finally the raw materials will flow into the sand collecting plate through sand output.

The invention discloses a prefabricated conical shell steel supporting structure capable of being hoisted for squat silo construction. The prefabricated conical shell steel supporting structure comprises a conical shell wall plate assembly, a ring beam assembly, a radial beam, a lifting lug assembly, an adjustable supporting assembly, an anti-swing assembly, a connecting assembly, an auxiliary positioning assembly and a sling connecting assembly. Core components such as the conical shell wall plate and the supporting framework are all prefabricated in a factory, the quality is controllable, splicing and hoisting are only needed on site, high-altitude erecting operation is greatly reduced, the high formwork erecting risk and the hidden danger of falling objects from high altitudes are reduced, hoisting stability is high, safety is improved, hoisting stress is dispersed through the lifting lug stiffening plates, and the hoisting efficiency is improved. The anti-swing assembly and the cable wind rope cooperatively control swing, it is ensured that the overall hoisting process is stable, structural collision and stress overload are avoided, the splicing precision is high, the adaptability is high, adjustability during installation is achieved through the adjustable supporting assembly arranged on the squat silo top, and it is ensured that the hoisted steel supporting structure can accurately fall on the preset position of the squat silo top.

The invention relates to a large silo coal blending analysis system, and belongs to the technical field of coking. The system comprises a silo coal resource access statistics module, a switching analysis module, a coal blending ratio difference analysis module, a coal blending and coke quality prediction module and an information display module. Firstly, the silo coal seam distribution condition is established, then the coal seam resource switching condition is analyzed and judged according to the discharging weight, the accumulated coal blending execution deviation rate is calculated, and the coal blending amount and the switching condition of the next period are estimated; the blended coal and coke quality prediction module predicts the quality and analyzes the change condition according to the actual coal blending ratio and the like; and the information display module stores and visually displays the result. The system has strong analysis and prediction capabilities, and can comprehensively and deeply analyze yesterday coal blending conditions, scientifically predict coke quality, intelligently plan today coal blending by means of accumulated coal blending execution deviation rates, simply, conveniently and quickly grasp dynamics and trends, guide coal blending and quality control, improve product quality, reduce cost and enhance competitiveness.

The invention discloses a material level intelligent sensing and early warning system in the silo unloading process, and relates to the technical field of silo material level intelligent sensing. The method comprises the following steps: a data acquisition module used for acquiring a multi-modal data stream; the model construction module is used for constructing a normal unloading model based on the multi-modal data flow and a preset physical mechanism constraint; the state judgment module is used for extracting a current feature vector from the multi-modal data stream; comparing the current feature vector with a feature distribution range in a multi-dimensional feature space determined by a normal unloading model, and judging a current material flow state; according to the invention, material flow abnormal symptoms can be captured in time, early warning of the blocking risk is realized, the production rhythm is prevented from being disturbed by material flow interruption, the potential safety hazard caused by manual entering into the silo for troubleshooting is reduced, the grain loss and equipment damage risks caused by long-term retention and mildew of materials are reduced, and the storage safety and the operation stability of a grain storage system are guaranteed.

The utility model discloses a stock bin, a 3D printing feeding device and a 3D printing system, the stock bin comprises a box body, a communicating piece and a guiding piece, and the box body is provided with an inner cavity; the communicating piece is arranged in the inner cavity, the communicating piece is provided with a discharging channel and at least one feeding channel, and the discharging channel is communicated with the feeding channel; the communicating piece further comprises a discharging releasing ring, one end of the discharging releasing ring extends into the discharging channel, the other end of the discharging releasing ring extends out of the discharging channel, and the discharging releasing ring is used for locking or releasing the extending material guiding pipe extending out of the box body from the discharging releasing ring. And the guide piece penetrates to the inner cavity from the outside of the box body and is movably connected with the box body so as to abut against the discharging release ring. The guiding piece movably abuts against the discharging releasing ring, the discharging releasing ring can be switched from the locking state to the releasing state, then a user can conveniently pull out the extending material guiding pipe from the discharging releasing ring from the outside of the box body, and therefore the user can conveniently clean broken wire materials extending out of the material guiding pipe.

The utility model relates to the technical field of gravel feeding, and solves the problem that the matching degree of the feeding speed and the sand making requirement is poor. The feeding-controllable adjusting device comprises a material inflow bin installed on a feeding port of a sand making machine, a material guiding port is formed in the side wall, opposite to the feeding port, of the material inflow bin, and the communication state between the material guiding port and the feeding port is established or released by installing a material limiting device. The material limiting device comprises side plates which are symmetrically installed on the side wall of the material inflow bin front and back and used for forming a material limiting channel, a turning plate is installed at the position where a material guiding opening is formed in the material limiting channel, a butt joint plate matched with the turning plate is arranged below the turning plate, and a hydraulic push rod connected with the turning plate is arranged on the side plates in a penetrating mode. The hydraulic push rod is arranged on a supporting frame at the upper end of the sand making machine, the turning plate is rotationally connected with the free end of the hydraulic push rod, the width of the turning plate is matched with the opening width of the material guiding opening, and the bottom face of the turning plate is connected with the top face of the butt joint plate to cover the material guiding opening.

The invention belongs to the technical field of tunnel construction, and relates to a longitudinal slope non-uniform rectangular tunnel surface support pressure calculation method, which comprises the following steps: adjusting an included angle between a wedge and a working surface in a six-block silo-wedge model based on the gradient of a tunnel to be tunneled to obtain an upslope optimization model; on the basis of a stress system of the rectangular pyramid wedge-shaped body and the triangular prism wedge-shaped body in the tunneling process, a mechanical equation of the rectangular pyramid wedge-shaped body in the tunneling process and a mechanical equation of the triangular prism wedge-shaped body in the tunneling process are constructed, and then a critical support pressure control equation representing the working face stability in the tunneling process is obtained; constructing a support pressure equation of the soil cabin partition plate by utilizing a stress balance principle of a soil cabin soil body along a tunneling slope direction; and calculating the supporting pressure of the soil cabin partition plate in real time by utilizing a supporting pressure equation of the soil cabin partition plate based on the tunneling gradient, the burial depth, the working face width, the working face height and the wedge-shaped body sliding face inclination angle in the tunneling process so as to judge whether the working face is stable in the tunneling process of the to-be-tunneled tunnel.

The utility model provides a porous carbon preparation device which comprises a feeding unit, a reaction unit, a discharging unit and an air supply unit which are sequentially arranged in the material advancing direction, the feeding unit comprises a stock bin and a feeder, an outlet of the stock bin is connected with an inlet of the feeder, and an outlet of the reaction unit is connected with an outlet of the feeder. An outlet of the feeder is connected with a feeding hole in the upper end of the reaction unit through a pipeline; the reaction unit comprises a reaction furnace, and a dispersion plate is arranged at the bottom; the discharging unit comprises a separator and a collector which are connected with each other; the separator is connected with a discharging hole in the upper end of the reaction unit through a pipeline; the gas supply unit comprises a steam generator which is connected with an inlet of a gas preheater through a pipeline, and an outlet of the gas preheater is connected with a gas inlet in the lower end of the reaction unit through a pipeline. The device disclosed by the utility model is simple in structure and convenient to operate, industrial production is easy to realize, and the prepared porous carbon has the characteristics of developed pores, high uniformity, large specific surface area, deeper pore depth, excellent performance and the like.