105 results about "Coal briquette" patented technology

The utility model belongs to the technical field of furnace slag treatment, particularly relates to an AI identification automatic dust removal robot for a furnace slag treatment smart factory, and aims to solve the problems that furnace slag in a furnace is difficult to completely move out in the process of moving the furnace slag out of the furnace at present, and the furnace slag in the furnace is accumulated during long-time use, so that the furnace slag in the furnace cannot be completely removed. In order to solve the problems that in the prior art, ventilation in a stove is not smooth enough, and normal combustion of coal briquettes is affected, according to the scheme, the stove comprises an electric crawler-type base, a mounting box is welded to the top of the electric crawler-type base, a door plate is hinged to an opening in one side of the mounting box, and a vacuum pump is fixedly mounted on one side of the top of the electric crawler-type base through bolts; according to the furnace slag collecting device, the suction pipe can be transferred into the furnace, furnace slag stored in the furnace can be sucked out and collected into the net cage in a centralized mode, and therefore the furnace slag contained in the furnace can be conveniently and rapidly collected in the centralized mode in the actual use process, and the furnace can work stably and continuously.

The invention discloses a fully mechanized coal mining face scraper conveyor large coal online crushing method and system, and relates to the technical field of coal mining mechanical equipment.The method comprises the specific steps that a large coal recognition unit is arranged above a scraper conveyor, the unit is composed of a camera and a large coal recognition model, the camera is used for collecting images of coal briquettes conveyed by the scraper conveyor, collected image data are detected by the large coal recognition model, and the detected large coal is tracked, the YOLO-GR recognition algorithm provided by the invention improves the coal briquette image recognition precision, especially the recognition capability of the large coal, a target can be positioned more accurately, and the recognition accuracy of the coal briquettes is improved. The point cloud data obtained by the speckle structured light measurement technology is used for providing an accurate basis for the judgment of the crushing position, the reinforcement learning algorithm is adopted, the crushing coordinates are optimized, the optimal crushing coordinates are determined and the crushing operation is optimized in combination with the point cloud data of the large coal, and the intelligent decision-making mode enables the crushing operation to be more targeted and accurate.

The utility model belongs to the technical field of coal mine screening, and particularly relates to coal mine screening equipment for coal mining, which comprises a screen mesh for screening a coal mine and a support frame arranged below the screen mesh and used for supporting and fixing the screen mesh, the screen mesh comprises a fine screen part with smaller screen meshes and a coarse screen part with larger screen meshes, and clamping rings are symmetrically installed at the two ends of the screen cloth, rotating grooves matched with the clamping rings are formed in the supporting frame, when the screening device is used, the screen cloth is rotated by a proper angle along the rotating grooves, switching of the fine screening part and the coarse screening part is conveniently achieved, and therefore screening of coal briquettes with different particle sizes is conveniently achieved. By designing the screen comprising the fine screening part and the coarse screening part and being provided with the rotatable clamping ring and the rotating groove structure, the equipment can conveniently switch the screen part so as to meet the screening requirements of coal briquettes with different particle sizes, the tedious operation of replacing the whole screen is avoided, the downtime is shortened, and the production efficiency is improved.

A forked roller composite crusher includes a forked crusher, a double-toothed roller crusher, a coal cake detection component, and a controller. The inlet of the double-toothed roller crusher is located directly below the outlet of the forked crusher. The forked crusher includes a crusher shell and a steel fork assembly. The steel fork assembly is mounted on the crusher shell and includes two sets of crushing components. Each set of crushing components includes a support frame, a linear reciprocating drive mechanism, and steel fork heads. The two sets of support frames are arranged opposite each other inside the crusher shell. Each set of support frames moves linearly reciprocally under the drive of the corresponding linear reciprocating drive mechanism. Several steel fork heads are provided on each set of support frames. This composite crusher can effectively crush the coal cake discharged from the filter press, allowing subsequent processing of the coal cake to continue. Furthermore, the entire crushing process requires no manual intervention, greatly improving crushing safety.

The invention discloses a coal gangue sorting device without adhesive tape transportation, and relates to the technical field of coal gangue sorting. The device comprises a sorting box used for sorting coal briquettes and gangue, and further comprises an impurity removal unit arranged in the sorting box and comprising a conveying assembly and a discharging assembly, and spiral conveying blades used for conveying the coal briquettes and the gangue are arranged in the conveying assembly; and the sorting unit is arranged in the sorting box and comprises a vibration assembly, a collection assembly and an adsorption assembly. The device has the advantages that lossless conveying of coal briquettes and gangue can be achieved by adopting a rotary conveying mode of the spiral conveying blades, disintegrating slag and dust in the coal briquettes and the gangue can be effectively removed in cooperation with screening and adsorption effects during conveying, and meanwhile efficient separation of the coal briquettes and the gangue can be achieved by utilizing mass difference and adopting a vibration separation mode; and secondary separation is conducted in an airflow blowing mode, part of gangue remaining in the coal briquettes obtained after primary separation is effectively removed, and the separation effect is better.

The utility model discloses an automatic control hydraulic material pushing device which comprises a machine head frame, a first motor is fixedly connected to the inner side of the machine head frame, a frame is fixedly connected to the inner side of the machine head frame, a second motor is fixedly connected to the inner side wall of the frame, and an output shaft of the second motor is fixedly connected with a driving gear. A bearing is fixedly connected to the top end of the frame, a threaded rod is fixedly connected to the interior of the bearing, a driven gear is fixedly connected to the outer surface of the threaded rod, a threaded block is in threaded connection to the outer surface of the threaded rod, and a scraping plate is fixedly connected to the top end of the threaded block. The water accumulation pool is arranged, the pipeline is installed at the top end of the adhesive tape, the adhesive tape is washed through the spray head, coal briquettes are prevented from being accumulated on the surface of the adhesive tape, the driving gear and the driven gear are arranged, the threaded rod is driven to rotate, the threaded block is driven to move, the scraper is driven to move up and down, the scraper makes contact with the adhesive tape, accumulated coal on the surface of the adhesive tape is scraped off, and the coal falls off along the slope.

The impurity removal device comprises an impurity removal device body arranged between two raw coal belt conveyors, the impurity removal device body comprises an impurity removal box with an opening in the upper portion of the right side, and the bottom of the impurity removal box is fixedly connected with four supporting legs in a rectangular shape. And a feeding hole is formed in the inner wall of the left side of the impurity removal box. By arranging a series of structures, sundries in coal briquettes can be conveniently hooked and separated during conveying of the coal briquettes, the hooked sundries can be conveniently obliquely and outwards vibrated, guided, discharged and collected, crushed slag and silt can be integrally and automatically subjected to hard vibration filtering and screening, the impurity removal effect is improved, the sundries do not need to be taken out of the machine by personnel, and the labor intensity is reduced. And in addition, the modes of hooking and cleaning, vibration guiding and discharging and hard vibration filtering and screening are integrally achieved through a single drive, multifunctional independent driving equipment is not needed, and the energy-saving effect is high.

The utility model discloses a coal quality detection device and relates to the technical field of coal quality detection. Comprising a fixing base, a supporting base is arranged on the first plane of the fixing base, one side of the supporting base is open, and the first plane is the contact face of the fixing base and the supporting base; the testing mechanism is arranged in the fixing seat and used for carrying out sinking and floating detection on the coal briquettes, the testing mechanism comprises a cleaning part, a filtering part and a control part, the cleaning part is arranged on the outer side of the supporting seat and used for storing the heavy liquid, the filtering part is arranged in the cleaning part and used for containing the coal briquettes, and the control part is arranged in the fixing seat. Through the arrangement of the cleaning piece and the control piece, the heavy liquid storage barrel, the supporting pipe, the through hole, the rotating disc, the connecting rod, the connecting disc and the transmission shaft are matched to drive the fixed barrel and coal in the fixed barrel to swing, and the situation that a tester manually swings the net bottom barrel back and forth to rotate is avoided; therefore, the labor intensity of testers in the testing process is reduced.

The present application relates to the technical field of coal briquette crushing, and discloses a screening device for coal briquette conveying, which comprises a box body provided with an inlet and an outlet, and a screening mechanism arranged in the box body; the screening mechanism comprises a first screening plate, a collecting box with an open top, and a plurality of crushing assemblies arranged along the length direction of the first screening plate; the first screening plate is arranged obliquely and fixed to the box body; the collecting box is fixed to the box body and located at one end of the first screening plate close to the bottom of the box body; each crushing assembly comprises a moving block, a linkage block, a plurality of conical blocks, and a driving part for driving the moving block to make vertical reciprocating motion; the moving block is slidably connected to the box body; the linkage block is fixed to the moving block; each conical block is fixed to the linkage block, and the first screening plate is located on the motion track of the conical blocks; the moving directions of adjacent two moving blocks are opposite. The screening device can solve the problem that the existing crushing device cannot clean and collect the impurities remaining on the screen.

The utility model relates to the technical field of medium-speed coal mills, in particular to a scraper blade in an air duct of a medium-speed coal mill, which comprises a base and further comprises a mill body arranged at the top of the base and used for grinding coal briquettes, connecting plates are arranged on the front side and the rear side of the surface of the mill body, mounting holes are formed in the surfaces of the connecting plates, and the connecting plates are arranged in the mounting holes. A mounting plate is arranged on one side of the connecting plate; through cooperation of a connecting plate, a mounting plate and a second bolt, a worker can conveniently maintain and dismount the scraper body in the later period, the use strength and toughness of the scraper body can be improved through reinforcing ribs, the wear-resisting plate can be located in an inner cavity of the positioning shell through the wear-resisting plate, the wear-resisting plate plays a role in preventing materials from scouring the scraper body, and the service life of the scraper body is prolonged. And through cooperation of a first bolt, a locking gasket and a gear ring, the situation that the scraper body is affected by equipment operation to cause vibration, and consequently the abrasion-resistant plate is prone to loosening can be avoided.

The invention discloses a numerical simulation-based top coal briquette migration path determination method, which comprises the following steps of: collecting basic information of a fully mechanized caving face, including coal seam and rock stratum thickness, mechanical parameters, particle size and the like; then, building a coal caving test model by using particle flow software PFC and calibrating parameters; marking particles are selected to record the positions of the marking particles in the initial and normal coal caving stages, and a top coal transporting path is obtained; and finally, the excessive coal caving degree of the coal caving support is adjusted based on the path, and a coal caving process optimization scheme capable of improving the top coal recovery rate is provided. The method can accurately determine the top coal transportation path, overcomes the defects of a traditional method, provides support for improving the top coal recovery rate, and facilitates efficient and safe production of a fully mechanized caving face.

The utility model discloses a protective sealing device for pulverized coal production, which comprises a flour mill body, a discharge pipe and a machine body input pipe, the discharge pipe is mounted at the bottom of the flour mill body, the machine body input pipe is arranged at the top of the flour mill body, a sealed feeding device is mounted at the top of the machine body input pipe, and the sealed feeding device comprises a horizontal conveying pipe. A discharging square pipe is welded to the bottom of the material conveying pipe and connected with the machine body input pipe, a feeding square pipe is welded to the top of the material conveying pipe, the discharging square pipe and the feeding square pipe are not located on the same vertical line, a feeding hopper is welded to the top of the feeding square pipe, a sealed material pushing device is installed in the material conveying pipe, an air cylinder is fixedly installed at the right end of the material conveying pipe, and an output shaft is fixed to the right end of the sealed material pushing device. A vent hole is formed in the left end of the conveying pipe. Blanking of coal briquettes can be controlled without manual work, one position of the blanking square pipe and one position of the feeding square pipe are kept to be communicated with the interior of the conveying pipe, the other position of the blanking square pipe and the other position of the feeding square pipe are kept to be closed, sealing performance during blanking is guaranteed, and excessive dust in the flour mill body is prevented from flying out of the feeding square pipe during feeding.

The utility model discloses a wiring type square briquette coal pressing mold, and belongs to the technical field of briquette coal preparation. Comprising a pressing head device, a wiring device, a mold body and a demolding device. The wiring device comprises a detachable wiring structure, the detachable wiring structure is formed by splicing and fixing a plurality of wiring units along a wiring structure segmentation schematic line, and a plurality of wiring ports are uniformly formed in the detachable wiring structure in the vertical direction; the mold main body comprises a cylindrical mold and a detachable pressure-bearing base which are assembled and connected together; the demolding device comprises a double-layer demolding device, the double-layer demolding device is formed by connecting an inner buffer layer into an outer pressure bearing layer in a matched mode, and an inner layer sealing base plate is arranged at the bottom of the inner buffer layer. According to the utility model, the damage-free demolding process is realized by designing the double-layer demolding device, the operation of pre-burying various data lines when the square coal sample is pressed is realized by matching the drilling device with the detachable wiring device, and the pressed briquette is accurate in size data, so that a reliable sample is provided for subsequent experiments.

The invention belongs to the technical field of belt conveyor pretreatment equipment, and particularly relates to a coal briquette pretreatment device for a belt conveyor, which comprises a crusher main body, and a treatment box is fixedly connected to the crusher main body. The technical means that the crusher body and the treatment box are matched is adopted, preliminary particle size screening is conducted on input materials through the screening inclined plate arranged in an inner cavity of the treatment box, the materials with the large particle size and the small particle size enter the first rotating cylinder and the second rotating cylinder correspondingly, and the first rotating cylinder conducts heating treatment on the materials with the small particle size through the arc-shaped electric heating plate and the striker plate and conducts fixed-weight discharging; and when the second rotating cylinder rotates, a first arc-shaped abutting rod is matched with a spring set to drive a guide plate and other components to move, and the blended materials are intermittently conveyed to the feeding end of the crusher, so that resource waste is avoided, the operation process of equipment is simplified, and the working efficiency is improved. And the overall maintenance cost of the equipment can be reduced.

The utility model discloses a telescopic support device for coke oven coal supporting plate, including setting up in the bracket of civil engineering platform, setting up in the support frame of bracket top center position, slidingly connected in the support frame's support platform, setting up in the drive mechanism of support frame below, drive mechanism one end is fixed in the bracket, and the other end fixedly connected in support platform bottom, and the top of coal car is provided with the fixed frame, and the bottom of support frame is connected in the top of fixed frame, and the inside of support platform is provided with the guide rail, and the both sides of support frame are provided with the slider matched with guide rail, and the slider slidingly connected in the guide rail, and the top of coal supporting plate leans to support platform and includes, and the device forms telescopic dynamic support structure, when coal supporting plate enters the non -supporting interval from coke oven mouth, and drive mechanism drives support platform and leans to coal supporting plate bottom along support frame and slides, and the weight of coal cake is borne with the self -supporting structure of coal car, and the stability of coal loading operation is guaranteed.

The coal as fired one-stop sampling vehicle comprises a coal mining device, a magnetic separation device, a drying device and a crushed coal grinding device which are sequentially communicated according to working procedures and fixedly arranged on a vehicle body, the coal mining device comprises a transmission mechanism, a lifting assembly, a coal taking mechanism and a coal digging and retreating assembly, and the magnetic separation device comprises a magnetic attraction mechanism. The crushed coal grinding device comprises a crushing mechanism and a grinding mechanism. The coal mining device is arranged, so that the use position of the coal taking mechanism can be quickly adjusted, the coal digging and retreating assembly is combined to assist in relieving the moving and blocking state of coal briquettes, and the coal briquette sampling efficiency is improved; the magnetic attraction mechanism is arranged in the coal conveying process, so that magnetic impurities can be discharged in time, and the coal subjected to magnetic attraction is reheated to achieve the purpose of drying; the coal crushing mechanism is arranged to crush coal, then crushed coal blocks are guided into the grinding mechanism through the flow guide structure to be ground, coal slag formed after grinding falls out and is collected, sampling use is facilitated, and the detection efficiency of the coal quality is improved.

The application discloses a coal block crusher cleaning device, relates to the technical field of coal mine production, and improves the problems that if the effective interval adjustment of the brush plate is difficult, on one hand, it is difficult to maintain stable cleaning strength only by intermittent extrusion force, leading to incomplete cleaning of coal cinder, on the other hand, the coal cinder that is not cleaned in time can be mixed into a subsequent processing flow, affecting the quality of coal products, reducing the market competitiveness of products and the like, and comprises a box body, the cleaning mechanism comprises an electric cylinder and a push plate, and the other side surface of the push plate is fixedly provided with brush strips and spraying pipes respectively, the application can stably move the push plate installed at the output end through the cleaning mechanism, the brush strips and the spraying pipes connected with the push plate follow synchronously, through the linkage design, the brush strips and the spraying pipes can be accurately close to the crushing mechanism, efficient cleaning and flushing of residual materials on the surface of the crushing equipment are realized, and the cleaning effect is obviously improved.

The present application relates to a kind of gravity balance type tamping machine and its working method, the gravity balance type tamping machine includes rack, tamping hammer, hammer lifting driving device, counterweight box, flexible connecting mechanism, lock hammer holder, hammer lifting holder and safety stop device.Gravity balance type tamping machine uses gravity balance type synchronous transmission system, through flexible connecting mechanism, hammer lifting driving device is combined with lock hammer holder, lifting holder and safety stop device organically, realize that driving end is separated from clamping end completely, the synchronous movement error of clamping end and driving end is ≤0.5mm, and working stability is high;Through multi-dimension sensor fusion, amplitude modulation frequency modulation intelligent closed-loop control, realize the accurate control of hammer lifting and drop hammer, ensure that coal cake tamping is uniform, and hammer lifting height and frequency can be adjusted in real time according to coal cake thickness / hardness, flexible, safe and reliable.

The invention belongs to the technical field of coal briquette screening equipment, and particularly relates to a fluctuating multi-element screen which comprises a fluctuating multi-element screen body, guardrails are hinged to the two sides of the top end of the fluctuating multi-element screen body through hinges, and a feeding hopper is fixedly connected to a feeding opening of the fluctuating multi-element screen body through bolts. And the inner wall of the feeding hopper is fixedly connected with a coal briquette material pretreatment mechanism. The fluctuating multi-element screen has the functions of detecting the humidity of coal briquette materials, drying and reducing the surface adhesion force, and also has the capability of collecting fine coal powder in the coal briquette materials, so that the fine coal powder can be collected and reused, the environmental protection performance of the fluctuating multi-element screen can be improved, the body health of workers is guaranteed, and the working efficiency is improved. And in addition, the situation that screen holes in the fluctuating multi-element screen are interfered by fine pulverized coal with large adhesion force can be avoided, the grading screening effect of coal briquette materials in the fluctuating multi-element screen is improved, and the use reliability of the fluctuating multi-element screen is improved.

The invention relates to a backwashing well coal crushing device, and relates to the field of coalbed methane exploitation technology, the backwashing well coal crushing device comprises a coal crushing section located at the bottom end, the top end of the coal crushing section is provided with a coal crushing section, the coal crushing section is relatively communicated with the interior of the coal crushing section, the top end of the coal crushing section is provided with an oil pipe, and the oil pipe is communicated with the interior of the coal crushing section. And the interior of the oil pipe is relatively communicated with the interior of the coal crushing section. The device has the effects of cleaning sediments such as large-particle coal briquettes in a shaft, reducing the influence on underground drainage and mining equipment and prolonging the pump inspection period.

The utility model relates to the technical field of coal mining and processing, in particular to a coal washing pool for coal processing, which comprises a water injection tank, the left end of the water injection tank is fixedly connected with a water inlet pipe, the inside of the water injection tank is fixedly connected with a partition plate, the right end of the water injection tank is fixedly connected with a washing pool, and the left side of the washing pool is fixedly connected with an inclined plate. The coal briquette cleaning device comprises a cleaning pool, the lower surface of the cleaning pool is fixedly connected with convex blocks which are distributed in a linear mode, the interior of the cleaning pool is rotationally connected with a rotating shaft, and the two ends of the rotating shaft penetrate through the surface of the cleaning pool. And meanwhile, a second gear is driven to rotate through a coupler, the second gear and a first gear drive a rotating shaft to rotate under the meshing effect, a stirring plate fixedly connected with the rotating shaft and a limiting wheel stir the cleaning liquid, and the effect of fully cleaning attachments on the surfaces of the coal briquettes is achieved.

A method for producing ferrocoke using a chamber coking process is disclosed. This method employs a tamping process to produce iron-containing coal cakes, and fills the space between the iron-containing coal cakes and the carbonization chamber walls with coking coal that does not contain iron ore powder. No additional heat transfer medium is required, ensuring a high iron ore powder ratio and ferrocoke strength under chamber coking conditions, while simultaneously preventing corrosion and damage to the traditional coke oven carbonization chamber walls. Using this method, the iron ore powder ratio can reach 10-20%, and compared to directly coking with iron-containing coal cakes without filling with coking coal, coke production can be increased by 5-15%. This method can directly utilize existing chamber coking equipment to produce ferrocoke, resulting in low investment and operating costs.

The utility model relates to a device for a coal blending experiment of a coking enterprise, in particular to a double-carbonization chamber test coke oven device. A double-carbonization-chamber test coke oven device comprises a small coke oven, silicon carbide rods are matched in the small coke oven, carbonization chambers of the small coke oven are connected with an incinerator through smoke pipes on the upper portions of the carbonization chambers, stop valves are arranged in the smoke pipes, the incinerator is connected with a purification device through a pipeline, the purification device is connected with a purification fan through a pipeline, and an air outlet of the purification fan is connected with a chimney. Blended coal cakes are loaded into a small coke oven carbonization chamber to be tested, raw coke oven gas generated in the coal blending test is guided into an incinerator through a smoke pipe on the upper portion of the carbonization chamber, waste gas generated after incineration is purified through a purification device to reach the standard and then discharged into a chimney, and the overall power of the waste gas comes from a purification fan behind the purification device. The test coke oven system disclosed by the utility model adopts the small coke oven for testing, so that the requirement of coal blending proportion adjustment of coking enterprises can be met; and other waste substances are not generated in the test process, and the whole is environment-friendly and efficient.

The utility model discloses a crushing impeller of a fan coal mill, and relates to the technical field of impellers of fan coal mills. The crushing impeller comprises an impeller body, a bearing disc is arranged above the impeller body, a plurality of groups of serrated knives are fixed at the top of the bearing disc in an annular array shape, and base cylinders connected with the impeller body are arranged in the serrated knives; multiple sets of L-shaped notches are formed in the outer wall of the curved surface of the impeller body in an annular array shape, and main blades are assembled at the positions, located at the top of the impeller body, of the edges of the multiple sets of impeller bodies at intervals. According to the utility model, the force bearing disc bears the force generated when coal briquettes fall off and plays a role in preliminary scattering, the auxiliary sheets and the main blades at the bottom can promote the coal briquettes to move back and forth in the radial direction, the scattering path of the coal briquettes is longer, and meanwhile, the main blades and the auxiliary sheets which rotate at a high speed are utilized to fulfill the aim of comprehensively scattering the coal briquettes; and coal briquettes below can be conveniently and efficiently ground, so that the working efficiency of the pulverizer is improved in a disguised manner.

The invention discloses a top coal crushing degree prediction method based on image recognition, and belongs to the field of image recognition, and the method comprises the steps: collecting a top coal image in real time, analyzing the definition and edge sharpness, automatically adjusting the focus of a camera to obtain a high-quality image, extracting the shape and size distribution characteristics of a coal briquette through an edge detection algorithm, and determining a crushing degree parameter. And if the parameters are matched with the preset threshold value, predicting crushing degree distribution through a neural network in combination with the geological strength and the mining depth, analyzing a change trend and judging whether mining process parameters need to be adjusted or not. And the optimized parameters process historical data through a feedback learning mechanism, a self-learning adjustment value is determined, and the neural network model is updated, so that more accurate crushing degree prediction and mining process closed-loop control are realized. According to the method, through fusion of image processing, feature extraction and neural network prediction, the top coal crushing degree identification precision and the mining efficiency are remarkably improved, and the dynamic adjustment capability of process parameters is optimized.

A novel conveyor for a coal mine belongs to the technical field of conveying equipment and comprises an electric belt conveyor body, a power module, a power switch, a laser range finder, a liquid crystal voltage display meter and an adjusting mechanism. Each adjusting mechanism comprises an electric push rod and a movable leg, the electric push rod is installed in one supporting leg, the upper end of the movable leg and the lower end of a movable column of the electric push rod are installed together, a supporting frame is installed at the upper end of the rack, and a laser range finder is installed on the lower side of the upper portion of the supporting frame; the power module and the power switch are installed in the electric cabinet, and the liquid crystal voltage display meter is installed in a duty room. When one or more corresponding supporting legs incline due to various reasons, related personnel can adjust the ground clearance of the corresponding supporting leg through the power switch and the adjusting mechanism in time, safe and stable operation of equipment is guaranteed as much as possible, conveying data of coal briquettes conveyed on the conveying belt can be monitored in real time, and the conveying efficiency is improved. And if necessary, equipment with faults can be timely maintained on site, so that the production efficiency is ensured.

The utility model relates to a fuel crusher, which belongs to the technical field of fuel crushers, and comprises a crusher case, two crushing rollers, a bucket-shaped feeding machine and a screening net, the crusher case is fixedly communicated with a fuel feeding hopper, a crushing box is fixedly mounted on the inner wall of the crusher case, the crushing rollers are rotatably connected with the crushing box, and the screening net is fixedly connected with the crushing box. The two crushing rollers are fixedly connected with bearing gears, the bearing gears on the two sides are connected in a meshed mode, the crusher case is fixedly connected with a motor box, the motor box is fixedly connected with a stepping motor, the driving end of the stepping motor is fixedly connected with the crushing rollers, a material guide groove is formed in the inner wall of the crusher case, and the bucket type feeding machine is installed in the crusher case. According to the utility model, coal briquette fuel can be quickly screened, fine qualified fuel can be quickly discharged for use, and large fuel can be repeatedly fed for re-crushing treatment, so that the crushing effect of the fuel can be effectively improved, and sufficient combustion is ensured.

The invention provides a damping device for a coal mining machine, and belongs to the technical field of coal mining. Comprising a hinged arm hinged to one side of a coal mining machine body and a hydraulic cylinder, a first connecting block is arranged on one side of the hinged arm, the telescopic end of the hydraulic cylinder is hinged to the first connecting block, a double-shaft motor is rotationally arranged at the end, away from the coal mining machine body, of the hinged arm, and a crushing roller is fixed to one output end of the double-shaft motor. By arranging the crushing assembly, large coal briquettes can be subjected to high-frequency multi-stage crushing, the crushing strength and range are increased, the crushing efficiency of the large coal briquettes is improved, residues of large coal briquettes are effectively reduced, the crushed coal briquettes can be smoothly conveyed outwards through a scraper conveyor, the fault occurrence rate in the transportation process is reduced, and the conveying efficiency of the large coal briquettes is improved. The coal conveying efficiency is improved, the shutdown time of the coal mining machine body due to blockage of large coal blocks is shortened, and the continuity of coal mining operation and the overall mining efficiency are guaranteed.

The invention discloses a mine unmanned clearance device based on visual navigation and an operation method and an installation method thereof, and relates to the technical field of coal mine desilting. A rotating base is arranged below a top fixing frame, lifting pieces are symmetrically arranged on the rotating base, and the ends, away from the rotating base, of the lifting pieces are connected with a fixing base; one end of the fixed base is connected with a cutting assembly through a telescopic arm, and the fixed frame is fixedly arranged at one end of the telescopic arm; the detection piece is arranged at one end of the fixing frame and used for detecting the coal accumulation state of the inner wall of the coal bunker body; the crushing part is arranged on one side of the detection part and connected with the detection part, and when the detection part detects that the accumulated coal in the coal bunker body is in a hardened state, the detection part drives the crushing part to do reciprocating motion to crush hardened coal briquettes; and the dredging piece is arranged on one side of the crushing piece and connected with the detection piece, and when the detection piece detects that the accumulated coal in the coal bunker body is in a loose state, the detection piece drives the dredging piece to dredge the loose accumulated coal.

The utility model discloses an efficient coal breaking device for a coal face, and belongs to the technical field of coal mining. The coal breaking device comprises a breaking groove, the top of the breaking groove communicates with a feeding port, the back face of the feeding port is fixedly connected with an L-shaped fixing strip, and the L-shaped fixing strip is provided with a reciprocating dredging mechanism; the reciprocating dredging mechanism comprises two limiting sleeves and a first motor. The ends, opposite to the L-shaped fixing strip, of the two limiting sleeves are sleeved with sliding connection strips. The sliding connection strip is fixedly connected with two transmission shafts. The sliding connecting strip is fixedly connected with an L-shaped connecting strip, the bottom of the L-shaped connecting strip is fixedly connected with a dredging scraping head, the output end of the first motor is fixedly connected with a three-edge rotating strip, and the three-edge rotating strip rotates to drive the two transmission shafts to reciprocate up and down. The reciprocating dredging mechanism is arranged to scrape and dredge the inner wall of the feeding port, the residue phenomenon is reduced, large coal briquettes are preliminarily scattered, the coal briquettes can be effectively prevented from being accumulated and agglomerated at the feeding port, and therefore the blocking phenomenon is avoided.