190 results about "Coal waste" patented technology

The invention provides an AI vision-based coal cinder amount intelligent detection early warning method and system, and the method comprises the steps: synchronously collecting the surface feature information, thermal radiation feature and internal structure information of a slag hopper of a slag conveyor through a dual-spectrum camera, and obtaining a dual-spectrum image; pixel-level coal cinder segmentation is carried out on the double-spectrum image; based on the segmentation result, counting the pixel proportion of the coal cinder area, and converting the pixel proportion into the actual coal cinder total amount proportion; identifying the segmented coal cinder area by adopting connected domain analysis, dynamically adjusting a size judgment threshold value through contour analysis and geometric feature extraction in combination with the bearing capacity of the slag conveyor, and determining whether large coal cinder exists or not; when the actual coal cinder total amount proportion is larger than the preset threshold value or large coal cinder exists, the risk level is generated to trigger the multi-level early warning control action, the actual coal cinder total amount proportion and the large coal cinder are automatically recognized through double-spectrum fusion segmentation, and early warning is given out when abnormity occurs, so that the accuracy and the real-time performance of coal cinder amount detection are effectively improved.

The invention is applicable to the technical field of road construction, and provides a digging and filling method for highway subgrade construction, which comprises the following steps: T1, carrying out construction operation according to a construction drawing, digging a pavement through a digging machine to form a groove, and piling dug soil on the ground on two sides of the groove; t2, the grooves are evenly filled with filling materials such as stone, coal cinder and gravel; t3, the road roller is controlled to slowly move along the foundation pit, a soil returning device at the front end of the road roller is used for backfilling soil on the two sides of the foundation pit, and a compaction steel wheel at the rear end of the road roller is used for compacting the backfilled groove; the soil returning device comprises a fixing assembly and a backfilling assembly arranged on the fixing assembly in a sliding mode. According to the method, the rotating shaft is controlled to rotate to drive the two sets of spiral conveying blades with opposite spiral directions to synchronously rotate, most of soil on the two sides of the groove is conveyed into the groove, the two sets of bulldozing plates are driven to push the residual coating into the groove through linkage of all the parts, and the backfilling efficiency is improved.

The application discloses a kind of coal mine underground mining wear-resistant active resistance-reducing drill pipe and its use method, including drill pipe body, spiral steel sheet is arranged around the outer wall of drill pipe body, spiral steel sheet is arranged along the length direction of drill pipe body, ball is rotationally arranged on the side wall of spiral steel sheet away from drill pipe body, part of ball is located in spiral steel sheet, another part is located outside spiral steel sheet.In using the application, after setting the position of drilling machine and the angle of holder, the drill bit is connected with the new wear-resistant resistance-reducing drill pipe, and then the drill bit and the drill pipe are clamped with the holder, the drill bit and the drill pipe are rotated and drilled into the coal wall or rock wall, the coal slag and rock slag generated during drilling are discharged from the drill hole through the spiral steel sheet, the rotatable ball embedded on the spiral steel sheet, the resistance during drilling process is reduced, the efficiency is improved, the drill pipe wear is reduced, and the friction heat is reduced.For the service life of drill pipe, drilling efficiency and construction safety, all have been improved.

The utility model belongs to the field of coal mine drilling blowout prevention holes, and aims to solve the problems that water and coal cinder in a hole easily and directly enter a main pipeline, gas fluctuation is easily caused by opening small negative pressure, and hidden dangers are caused to production efficiency and production safety in a traditional gas-water separation device. The utility model provides a common drill four-hole gas-water separator which comprises an upper-layer barrel, a lower-layer barrel and a pipeline connected between the upper-layer barrel and the lower-layer barrel. The upper surface of the upper-layer barrel body is provided with a pipe orifice for connecting a main pipeline negative pressure, an orifice blowout preventer, an orifice standby negative pressure and a hole wall standby negative pressure; the lower-layer barrel is located at the lower end of the upper-layer barrel, a second valve is arranged at the bottom of one side of the lower-layer barrel, and a first valve is arranged on a pipeline between the upper-layer barrel and the lower-layer barrel. The device is high in reliability, the problem that water and coal slag enter an extraction system in the drilling machine construction process can be effectively solved, and gas fluctuation caused by water drainage is avoided.

The invention discloses a planting method for increasing the carbon sink capacity of a saline-alkali soil ecological system and application. A planting method for increasing the carbon sequestration capacity of a saline-alkali soil ecosystem adopts an agriculture and forestry composite planting mode, ricinus communis is planted in a forest land, the carbon sequestration capacity of the saline-alkali soil ecosystem is increased by matching a fertilizer and a soil conditioner, the fertilizer comprises a compound fertilizer, the nitrogen content of the compound fertilizer is 15-18%, the phosphorus content of the compound fertilizer is 15-18%, the potassium content of the compound fertilizer is 15-18%, the application amount of the compound fertilizer is 417-450 kg.ha <-1 >, and the application amount of the compound fertilizer is 20-30 kg.ha <-1 >. The soil conditioner comprises coal cinder charcoal or rice husk charcoal. According to the planting method, the soil carbon reserve can be increased, and the plant carbon sequestration amount and the ecological system carbon sequestration total amount are remarkably increased. A research result provides a theoretical basis for ecological restoration and sustainable utilization of the coastal saline-alkali soil, and shows that the aims of reducing saline-alkali obstacles and fixing carbon and increasing sink can be synchronously achieved through coupled application of biological measures and a soil improvement technology, and the method has important ecological practical value.

This utility model relates to the field of honeycomb briquette stove technology, and in particular discloses a honeycomb briquette stove with convenient slag removal, including a furnace frame and a furnace core mounted on the furnace frame for holding coal; it also includes a slag removal mechanism mounted on the furnace frame and used in conjunction with the furnace core. The slag removal mechanism includes a loading component, a slag pushing component movably mounted relative to the loading component, and a transmission mechanism that works in conjunction with the slag pushing component. The loading component is used to carry the coal located at the bottom of the furnace core. A first clearance space is provided between the loading component and the furnace core for the movement of the slag pushing component and the coal at the bottom of the furnace core. The user drives the slag pushing component to move back and forth through the transmission mechanism, so that the slag produced by the combustion of the coal at the bottom of the furnace core is pushed out. This utility model achieves rapid slag removal by setting a foot-operated transmission mechanism and using a mechanical slag pushing mechanism, avoiding the risks of manual operation and improving combustion efficiency; the setting of the limiting and dividing component further divides the slag during the removal process, preventing blockage and accumulation.

The application discloses a kind of three-proofing devices for coal mine, including outer tube, inner tube, slag discharge cylinder;Outer tube is connected with inner tube by positioning mechanism, and the outer end of slag discharge cylinder is provided with drill pipe sealing mechanism, and the peripheral portion close to the outer end of slag discharge cylinder is provided with gas extraction interface, coal slag discharge interface.The three-proofing device of the application can be installed on the drilling hole opening wall of gas extraction main pipeline construction, which can prevent fire, prevent back gas and prevent explosion;Among them, the drill pipe sealing assembly has the effect of blocking gas, so that it cannot enter the tunnel, which avoids the condition that gas leakage in drilling operation leads to the threat to the life safety of construction personnel, improves the safety of coal mining operation, and has perfect functionality, and has fixing and sealing effect simultaneously, effectively prevents gas leakage;And it is convenient to install, simple to disassemble, widely applicable, with large stroke range of expansion mechanism, can be applied to various aperture, can prevent spouting and outburst, further improves the use effect of the application.

The utility model relates to the technical field of coal cinder treatment, in particular to a high-pressure coal cinder flushing blanking device for a coal cleaning plant, which comprises a blanking hopper, a support plate, a water tank, a booster pump and a flushing component. And the water tank is arranged at the bottom of the supporting plate, and the booster pump is arranged at the top of the supporting plate. The flushing assembly is composed of a supporting frame, a motor, a rotating plate, a connecting rod and an L-shaped frame, a nozzle is installed on the L-shaped frame and communicates with a booster pump through a spraying pipe, and the input end of the booster pump communicates with the water tank. According to the device, through cooperation of the booster pump and the flushing assembly, automatic high-pressure flushing of coal cinder crust on the side wall of the blanking hopper is achieved, the labor intensity and potential safety hazards of manual cleaning are reduced, meanwhile, the flushing angle and the waste water flow guide design are optimized, and the cleaning range, the flushing quality and the system stability are improved.

The utility model provides a slag storing and discharging system of a drainage pipe. The slag storing and discharging system of the drainage pipe comprises a slag discharging box, an overflow pipe and a slag discharging pipe. When the slag storage and discharge system for the drainage pipe is used, liquid in the drainage pipe is discharged into the slag discharge box, coal slag in the liquid is precipitated in the slag discharge box and can be discharged through the slag discharge pipe, and the liquid in the slag discharge box can overflow from the overflow pipe below and then flow into the water drainage device. When the height of coal slag in the slag discharging box exceeds the height of the lowest overflow pipe or the lower overflow pipe is blocked, liquid in the slag discharging box can overflow from the upper overflow pipe. When an operator inspects or inspects on site, after liquid is discharged from the automatic water discharging device corresponding to the overflow pipe located on the upper portion, abnormity can be found in time, deslagging operation can be carried out, dredging maintenance can be carried out on the overflow pipe located on the lower portion, and the situation that liquid cannot be discharged from the interior of the deslagging box, and later gas drainage is affected is avoided.

The present application relates to the technical field of coal mine safety protection, and discloses a protection structure and method of gas extraction drilling, which comprises a box, a four-way pipe and an air bag. Two through holes are formed in the upper part of the box, one of which is connected with a second pipeline. The other end of the second pipeline is used for being connected with a negative pressure pipeline, so that gas is sucked into the negative pressure pipeline. The four-way pipe is connected above the box. The lower end of the four-way pipe is connected with the other through hole of the box through a first pipeline. One of the transverse ports of the four-way pipe is sealingly connected with a hole sealing pipe at the outlet of the drilling. The other transverse port is connected with a sealing sleeve for sealing the gap between the drilling tool. The air bag is connected with the four-way pipe. One side opening of the air bag is connected with the top longitudinal port of the four-way pipe through a third pipeline. The other side opening of the air bag is connected with a fourth pipeline for being connected with the negative pressure pipeline. With the ejection of gas, coal residue and coal residue water, the three are respectively introduced into the box and the air bag through the four-way pipe.

The utility model discloses an underground automatic drainage system for a coal mine, which comprises a filter box and a waste scraping mechanism, and the front side and the rear side of the upper surface of the filter box are respectively provided with a sliding chute; the waste scraping-out mechanism comprises lead screws, sliding seats, sliding rods, limiting blocks, scraping plates and first springs, the lead screws are rotationally connected to the front side and the rear side of the interior of the filtering box, the outer threaded faces of the two lead screws are in threaded connection with the interior of one sliding seat, and the sliding rods are slidably connected to the front side and the rear side of the sliding seat; the lower surfaces of the two sliding rods are fixedly connected with the upper surface of a scraper, the upper surfaces of the sliding rods are fixedly connected with limiting blocks, and the outer side faces of the sliding rods are movably sleeved with first springs. According to the automatic drainage system for the underground coal mine, when coal cinder is filtered, large coal cinder can directly fall into a waste box, and the waste scraping mechanism can scrape small coal cinder; the effect of cleaning the filter plate is achieved, and the filtering efficiency is not influenced.

The application discloses a coal mill slag discharging device, which comprises a slag discharging mechanism, the slag discharging mechanism comprises a slag discharging boom, the top end of the slag discharging boom is fixedly connected to the bottom surface of a coal mill, the bottom end of the slag discharging boom is fixedly connected with a slag discharging cylinder, the bottom end of the slag discharging cylinder is fixedly connected with an aggregation pipe, the bottom end of the aggregation pipe is fixedly connected with a slag discharging pipe, and the top surface of the slag discharging cylinder is fixedly connected with two slag falling pipes; the reverse flip reciprocating mechanism can reset the stirring mechanism, the one-way limiting mechanism can clamp the slag conveying structure in the process of resetting the stirring mechanism, reverse rotation of the slag conveying structure is avoided, one-way rotation of the slag conveying structure is ensured, continuous rotation of the slag conveying structure can timely and quickly discharge the coal slag in the coal mill, the influence of the coal slag on the coal mill is greatly avoided, the slag discharging process is fully automatic, manual operation is not needed, time and labor are saved, and the practicality of the coal mill slag discharging device is improved.

The utility model discloses a waste recovery device, which comprises a recovery bin, a first material inlet, a second material inlet, a third material inlet, a fourth material inlet and a fifth material outlet, a screening part; comprising a screening plate arranged in a recovery bin, and a vibration component is arranged below the screening plate; the dispersing component comprises a transmission assembly arranged above the screening plate and a plurality of scraping plates arranged on the transmission assembly; according to the coal cinder screening device, after coal cinder falls onto the screening plate, the coal cinder is driven by the scraping plates to move towards the first discharging opening through cooperation between the screening component and the dispersing component, the coal cinder is prevented from being accumulated at the end, close to the feeding opening, of the screening plate, and in the process that the scraping plates drive the coal cinder to move, the scraping faces of the scraping plates move the coal cinder towards the two sides of the screening plate; the coal cinder can be evenly distributed on the screening plate, and the working efficiency of the screening plate is improved.

The invention provides a coal water slag metering device based on a crushing mechanism. The coal water slag metering device comprises a metering device body, and a motor is mounted on the metering device body; the metering device body is further provided with a flow adjusting hand wheel. A detection pipe is fixedly connected to an opening in one side of an output pipe of the metering device body, a particle sensor is fixedly connected to the top end of the detection pipe, and a smashing mechanism is fixedly connected to an input pipe of the metering device body. Through the arrangement of the protective cover, the cooling fins, the inlet and outlet pipe, the rotating machine core, the crushing motor, the roller ball sleeve and the grinding roller ball, large-particle coal slag in coal slurry can be prevented from entering the metering device, and normal work of the metering device is guaranteed.

FIELD: mining.SUBSTANCE: invention relates to methods for thermal monitoring of coal waste dumps. Temperature measurements are taken inside the dump (2) using temperature sensors (3) located in its near-surface zone (1). Temperature readings from the temperature sensors (3) are transmitted to the monitoring center (4), where the source of self-heating is identified by the recorded excess of the standardized maximum temperature of the dump in at least one of the locations of the temperature sensor. To clarify the contours of the self-heating source, measurements of the thermal field are taken along the profiles above the dump using unmanned aerial vehicles (6) with thermal imaging control equipment installed on them. The profiles for the flight of unmanned aerial vehicles are oriented along the lines connecting each point of placement of the temperature sensor, in which an excess of the standard maximum temperature of the dump is recorded, with the points of placement of the temperature sensors adjacent to it.EFFECT: increased accuracy and efficiency, as well as reduced labour intensity of establishing contours of self-heating centres of coal waste.1 cl, 1 dwg

1. Name of the design product: coal leveling device. 2. Use of the design product: used for leveling coal powder and coal residue. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view.

This invention discloses a dust suppression and removal device for a fully mechanized mining face, comprising: a first pipe and a second pipe, the first pipe and the second pipe being radially spaced along an annular surface; the first pipe and the second pipe having linear water outlets, the extended lines of the linear water outlets on the first pipe and the second pipe being intersecting; and a baffle plate disposed on the periphery of the space between the first pipe and the second pipe, with gaps between the baffle plate and the first pipe and the second pipe at both ends. This invention forms a closed surface around the fully mechanized mining equipment by creating intersecting water mist, which reduces the risk of dust overflowing and also impacts the thrown coal slag blocks, assisting in the crushing of the coal slag blocks and their contact with the water mist, reducing the risk of dust generation again after the coal slag blocks are thrown out, and improving the dust suppression and removal effect.

The utility model relates to the technical field of coal mine transportation, in particular to a material arrangement baffle device of a power plant coal conveying belt conveyor, which comprises a belt and a dust hood, a leakage-proof mechanism is arranged on the belt, the leakage-proof mechanism comprises a baffle and a fixing frame, one side surface of the baffle is in contact with an evacuation ruler, a dredging mechanism is arranged on the dust hood, and the evacuation ruler is in contact with the dust hood. And the dredging mechanism comprises a dredging ruler and an arc-shaped plate. The fixing frame is mainly used for preventing a coal pile from turning outwards into a gap of the conveying belt, on one hand, waste of the coal pile is avoided, on the other hand, the trouble of manually cleaning coal cinder in the gap of the conveying belt is also avoided, a dredging mechanism is arranged, and a dredging ruler can disperse a structure where pulverized coal or coal particles are bonded compactly, so that the coal dust or the coal particles are prevented from being damaged. In the process that the dispersed coal piles pass through the arc-shaped plates, the towering coal piles collapse due to the semi-arc design of the arc-shaped plates, and the number of the towering coal piles is sequentially reduced along with the semi-arc design of the arc-shaped plates, so that the problem that the accumulated coal is excessively accumulated is avoided.

The utility model discloses a blast furnace ironmaking pulverized coal distribution device, and relates to the technical field of iron and steel smelting. The device comprises a mounting shell, a baffle is fixedly connected to the middle of the inner wall of the mounting shell, a pulverized coal circulation assembly used for conveying pulverized coal is vertically arranged on the surface of the mounting shell in a penetrating mode, two mounting frames are fixedly connected to the inner wall of the mounting shell, and the two mounting frames are located on the left side and the right side of the baffle respectively. A filter screen is embedded in the inner wall of the mounting frame, a reverse blowing cleaning assembly and a slag powder cleaning assembly which are used for cleaning the filter screen are arranged on the surface of the mounting shell, the pulverized coal circulation assembly comprises a Y-shaped three-way pipe, and two pipelines at the lower end of the Y-shaped three-way pipe communicate with the left side and the right side of a baffle correspondingly; the coal injection nozzle is convenient to use, the effect of effectively protecting the coal injection nozzle in use is achieved, large-particle coal slag in pulverized coal can be filtered, the coal slag is prevented from blocking the nozzle, and therefore it is guaranteed that coal injection work is conducted smoothly.

The utility model relates to the related technical field of screening equipment, in particular to raw material screening equipment for producing environment-friendly baking-free bricks. The center of one face of the screening box is fixedly connected with a feeding pipeline, the top of the end, away from the screening box, of the feeding pipeline is fixedly connected with a storage box, the bottom of the storage box is fixedly connected with a feeding port, the bottom end of the feeding port is fixedly connected with the feeding pipeline, and the interior of the feeding pipeline is rotationally connected with a first rotating shaft; the end, away from the feeding pipeline, of the first rotating shaft is rotationally connected with the screening box. Under the cooperative action of the screening box, the feeding pipeline, the storage box, the feeding port, the first rotating shaft, the crushing mechanism and the discharging mechanism, the environment where the device crushes coal cinder is relatively closed, raised dust generated when the coal cinder is crushed is prevented from being diffused into air outside the device, and then workers are effectively prevented from inhaling the raised dust.

The application belongs to the technical field of low-carbon cement materials, and particularly relates to a low-carbon production process and system of high belite cement clinker, wherein the low-carbon production system comprises a raw material pretreatment module, a clinker firing module, a flue gas control module and a product detection module; in the application, traditional limestone and paper mill filter residue are used as calcium raw materials, coal cinder and coal gangue are used as aluminum / silicon raw materials, phosphogypsum is used to completely replace natural gypsum as sulfur raw material, copper residue is used to adjust iron material, and finally, calcium fluoride sludge is used to replace fluorite, so that the effective utilization of solid waste is improved, resources are saved, and the adverse effects of solid waste on the surrounding environment are reduced; in the calcination process, low-temperature staged calcination is adopted, the calcination temperature is controlled to be 1200-1300 DEG C, and staged temperature rising is adopted; compared with the traditional portland cement calcination temperature, the temperature is 50-100 DEG C lower, energy consumption and carbon dioxide emission are effectively saved, and the theme of energy saving and environmental protection is met.

The utility model discloses a screening type deslagging system. For an existing thermal power plant, coal with the ash content of 20% or above is inevitably required to be burnt, the coal can be coked in a boiler, and large coke blocks can fall off through ash blowing. For a common dry-type slag discharging system, large coke blocks are difficult to grind through a slag crusher and need to be taken out manually, but the labor cost is increased. The coal cinder conveying device comprises a conveying device, a roller screen, a cinder crusher, a bucket elevator and a cinder bin, an outlet of the conveying device is communicated with an inlet of the roller screen and used for conveying coal cinder into the roller screen to be screened, an outlet of the roller screen is communicated with an inlet of the cinder crusher and used for crushing the screened coal cinder with qualified granularity, and the crushed coal cinder is conveyed to the bucket elevator. And an outlet of the slag crusher is communicated with the bucket elevator and is used for conveying the crushed coal slag into the slag bin through the bucket elevator. The screening type slag discharging device is used for screening type slag discharging.

The utility model relates to the technical field of boiler coal cinder cleaning, and discloses a boiler deposited coal cinder cleaning device which comprises a furnace body, a coal cinder cleaning device and a coal cinder cleaning device. The flue is arranged on one side of the hearth in the furnace body, and the bottom of the hearth is communicated with the bottom of the flue; the air passages are arranged at the bottom of the hearth in parallel, and exhaust ports are formed in the upper parts of the air passages, so that the following technical effects can be realized: the air passages are arranged at the bottom of the hearth and the bottom of the flue, and the coal slag is crushed and blown and crushed by utilizing the alternate cooling and heating effect of cold air and high-temperature coal slag, so that efficient cleaning is realized; the partition plate isolates the air channel from the hearth and the flue, it is guaranteed that cold air is kept at low temperature, and the coal cinder fragmentation effect is further optimized. The exhaust hood is designed to accurately control the flow direction of cold air, so that the cold air acts on the coal cinder in a concentrated manner, and the cleaning efficiency is improved.

The utility model discloses a coal mining machine for coal mining in a coal mine, which belongs to the technical field of coal mining machines and is characterized in that the coal mining machine comprises a coal mining machine body. Smoke containing particulate matter generated during coal seam crushing is absorbed by the dust hood through the filter box and the suction pipe and then enters the filter box, large-particle impurities such as coal cinder and broken stone are intercepted through the primary filter screen frame in the filter box and prevented from making direct contact with fan blades, fine dust is captured through the dust interception filter bag frame, and the dust removal effect is achieved. And finally, harmful gas and peculiar smell in the waste gas are removed through an activated carbon peculiar smell adsorption and purification frame, a three-stage filtration and purification system is formed, the suction efficiency and the dust collection precision are improved, the draught fan can be effectively protected, exhausted gas can be effectively purified, and the problems that an existing dust collection structure is prone to damage, and the peculiar smell of the waste gas is not treated are solved.

This invention relates to the field of coal quality testing technology, and particularly to a method, apparatus, equipment, and computer-readable storage medium for real-time coal quality testing based on a large model. The method includes: dividing the coal to be used into coal to be analyzed and coal not to be analyzed, and generating a coal quality testing and analysis signal; performing coal quality testing on the coal to be analyzed, calculating the coal quality testing and analysis coefficient, and determining whether the coal quality is qualified; marking qualified coal as usable coal and generating a qualified coal quality testing signal; obtaining a combustion scheme using a pre-trained large model and monitoring the combustion process in real time; generating an anomaly tracing signal if the monitoring results are abnormal; generating a feature acquisition signal if the monitoring results are normal; performing anomaly tracing analysis on the coal division or coal quality testing and analysis process, and re-executing the coal quality testing. By realizing closed-loop testing and real-time optimization of the entire process before, during, and after coal use, operation and maintenance costs and coal waste are reduced, and combustion efficiency is significantly improved.

The utility model relates to the technical field of coal cinder recovery, in particular to a treatment device for coal cinder recovery, which comprises a treatment box, one end of the treatment box is communicated with a cyclone dust collector, a baffle is arranged in the treatment box, a fan is arranged on one side of the baffle, a box cover is connected onto the treatment box, and a cooling calandria assembly capable of lifting and moving back and forth is arranged on the lower portion of the box cover. The calandria is covered with a radiating pipe and connected with an external water source through a hose, and the lower portion of the box cover is further connected with a scraper through a moving mechanism. The coal cinder cooling device exchanges heat with coal cinder through the cooling calandria into which flowing water can be introduced, forced convection is carried out on the interior of the device through the fan, materials can be cooled in a short time through the two cooling modes, meanwhile, the high-temperature coal cinder is indirectly cooled through the cooling calandria and the heat dissipation pipe as media, and the cooling effect is good. Dust in dust-containing gas is collected and filtered through the cyclone dust collector and the dust filtering box, so that water and gas which are heated after cooling can be directly recycled, and efficient recycling of waste heat is achieved.

The utility model provides a drainage pump with a water level control function, which belongs to the technical field of drainage pumps, and comprises a pump body and a volute, the volute is arranged at the bottom of the pump body, a water inlet pipe and a drainage pipe are arranged on the volute, a filter is arranged in the water inlet pipe, a backflushing component is arranged on the pump body, and the backflushing component comprises a backflushing pump and two groups of first control valves. The water inlet pipe is connected with the drain pipe through a pipeline, the backflushing pump is connected with the pipeline, the two first control valves are arranged on the water inlet pipe and the drain pipe respectively, a water suction port is formed in the drain pipe, a second control valve is arranged on the water suction port, a pump cover is arranged at the top of the pump body, a control module is arranged in the pump cover, and the first control valves and the second control valve are electrically connected with the control module. According to the device, through the arrangement of the backflushing assembly, a user can utilize a backflushing pump to backflush the filter and remove coal cinder, silt and other impurities attached to the filter under the condition that the filter is not disassembled, and the reliability of a filtering system of the device is improved.

This utility model relates to the field of gas extraction technology, specifically to a borehole protection structure and extraction device for underground directional bedding gas extraction, mainly solving the technical problem of easy clogging of existing borehole protection pipes in underground directional bedding gas extraction. This borehole protection structure includes a double-layer perforated pipe and a double-layer solid pipe. The double-layer perforated pipe includes an outer perforated pipe and a first inner solid pipe. The double-layer solid pipe includes an outer solid pipe and a second inner solid pipe. During operation, air is blown sequentially through the second inner solid pipe and the first inner solid pipe towards the bottom of the borehole. Coal slag and accumulated water enter between the outer perforated pipe and the first inner solid pipe through the slag inlet hole of the outer perforated pipe, and then, driven by air pressure, are discharged to the outside of the borehole sequentially through the first slag discharge channel and the second slag discharge channel. This effectively avoids clogging of the borehole protection pipe, ensures extraction operation time, improves extraction efficiency, and also avoids the occurrence of abandoned boreholes due to clogging.

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.