Automatic system for rapid cleaning, digging, conveying and efficient dehydration of large coal mine sump

Abstract

The invention relates to the technical field of coal mine water sump treatment, and particularly discloses a large coal mine water sump rapid cleaning, digging, conveying and efficient dewatering automation system. Comprising a set of lifting aggregate kilometer pumping equipment for a coal mine, a set of efficient continuous vibration rotational flow coal slime dewatering equipment, a set of high-speed centrifugal settling separation equipment, a closed conveying pipeline, two sets of mining transshipment feeding machines and at least two sets of rapid digging and shoveling equipment. And the closed conveying pipeline is connected between the lifting aggregate kilometer pumping equipment for the coal mine and the efficient continuous vibration rotational flow coal slime dewatering equipment. The device is high in bin cleaning speed, is an optimal optimal configuration scheme for rapid cleaning and digging, kilometer pipeline conveying, efficient dehydration and automatic system implementation of a million-ton modernized large coal mine water bin, has the maximum handling capacity and the highest efficiency, is pioneered in China, and is very considerable in economic benefit.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine sump treatment, and particularly to a large coal mine sump rapid cleaning, conveying and efficient dehydration automation system. Background Art

[0002] Currently, the cleaning of coal mine sumps across the country still remains in the traditional and old-fashioned sump cleaning mode, with a long cleaning period, slow sump cleaning speed, low equipment efficiency, and a maximum sump cleaning speed of no more than 30 m3 / h, far from meeting the sump cleaning requirements of ten-million-ton and modern large coal mines. The higher the coal production of modern large coal mines, the greater the amount of coal powder, the greater the industrial water consumption, the greater the sump siltation, the smaller the water storage volume of the sump, and the shorter the service life, which will result in the inability to clean the sump in a timely and effective manner, thus affecting the safe operation of the drainage system and the empty sump capacity, causing the sump's ability to prevent water inrush to decline, and bringing major hidden dangers to the safe operation of the mine. Therefore, the cleaning of coal mine sumps is a bottleneck restricting the safe production of mines. In severe cases, it directly endangers the life of the mine.

[0003] Therefore, we have successively investigated hundreds of ten-million-ton large coal mines. According to the current situation and requirements of sump cleaning production in each mine, we have researched and designed a set of overall solutions for ten-million-ton large coal mines, sump rapid cleaning, kilometer pipeline conveying, high-efficiency dehydration, automation system equipment, which can achieve equipment self-rescue and personnel safety under the conditions of running in the sump, soaking in water, and emergency, and ensure that the sump cleaning reaches safe production. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art and provide a large coal mine sump rapid cleaning, conveying and efficient dehydration automation system.

[0005] The technical solution of the present invention is as follows: A large coal mine sump rapid cleaning, conveying and efficient dehydration automation system includes a set of coal mine lifting and aggregate kilometer pumping equipment, a set of high-efficiency continuous vibration cyclone coal slime dehydration equipment, a set of high-speed centrifugal sedimentation separation equipment, a closed conveying pipeline, two sets of mine transfer and loading machines, and at least two sets of rapid cleaning and shoveling equipment; The closed conveying pipeline is connected between the coal mine lifting and aggregate kilometer pumping equipment and the high-efficiency continuous vibration cyclone coal slime dehydration equipment; One set of lifting and aggregating kilometer pumping equipment for coal mines, one set of high-efficiency continuous vibration cyclone coal slime dewatering equipment, one set of high-speed centrifugal sedimentation separation equipment, two sets of mine transfer and loading machines, and at least two sets of rapid excavation and loading equipment work together, and the working sequence is rapid excavation and loading equipment, lifting and aggregating kilometer pumping equipment for coal mines, high-efficiency continuous vibration cyclone coal slime dewatering equipment, high-speed centrifugal sedimentation separation equipment. One set of mine transfer and loading machine is used to receive the slag produced by the high-efficiency continuous vibration cyclone coal slime dewatering equipment, and the other set of mine transfer and loading machine is used to receive the slag produced by the high-speed centrifugal sedimentation separation equipment.

[0006] Preferably, the rapid excavation and loading equipment adopts a loader mode and a split design. The rapid excavation and loading equipment can be split into four major parts: a front-end aggregate mixing operation device, a four-wheel power drive device, an electric lifting operation platform, and the remaining parts. The rapid excavation and loading equipment includes a front-end operation mechanism, a drive device, an electric lifting operation platform, a solid non-track rubber tire walking device, and a remote control device.

[0007] Preferably, the lifting and aggregating kilometer pumping equipment for coal mines includes a front-end worm and worm slewing support, a rotating aggregate hopper, an aggregate protection device, a magnetic iron removal device, an aggregate hopper lifting oil cylinder, a hydraulic piston type pressurized pumping mechanism, a rigid crawler large torque hydraulic walking device, a hydraulic / electric lifting platform, a manual / remote control operation device, and two sets of stirring and aggregating devices.

[0008] Preferably, the vibration cyclone coal slime dewatering equipment includes two vibration motors, a double-layer vibrating screen, a vertical mud pump, a collection box, and four hydrocyclones. The processing capacity of the vibration cyclone coal slime dewatering equipment is 120m³ / h, the separation accuracy reaches 0.075mm, and the water content of the separated coarse-grained coal slime is <35%.

[0009] Preferably, the high-speed centrifugal sedimentation separation equipment includes a main motor, a sub-motor, a differential, a transmission mechanism, a drum, and a spiral device. The processing capacity of the high-speed centrifugal sedimentation separation equipment is ≤130m³ / h, the effective processing capacity is 108m³ / h, and the separation accuracy can reach 2 - 5um.

[0010] Preferably, the transfer capacity of the mine transfer and loading machine is ≤80m³ / h. The mine transfer and loading machine includes a spiral conveying cylinder, a spiral conveying auger, a hopper, a chassis, a turntable, a manual hydraulic pump, a manual hydraulic cylinder, a motor, and a reducer.

[0011] Preferably, the front-end operation mechanism adopts a mechanical structure for lifting the shovel loader bucket. The front-end operation mechanism includes a scraping and loading bucket, a stirrer, a lifting arm, and a loading bucket flipping device. The stirrer is driven by a drive device. The stirrer includes a stirring drum shaft and stirring blades, and the stirring drum shaft and stirring blades are arranged to rotate in the scraping and loading bucket.

[0012] Preferably, the driving device is a large-horsepower explosion-proof diesel engine. The driving device can be remotely controlled over a long distance and can drive the rapid excavation and loading equipment to realize the operation functions of starting and stopping, working switch, forward movement, backward movement, stirring, lifting, lowering, tipping, telescoping, and emergency stop.

[0013] Preferably, the electric lifting operation platform is supported by four oil cylinders to achieve the lifting operation.

[0014] Preferably, the coal mine lifting and aggregate kilometer pumping equipment further includes an emergency rescue hydraulic pump with a flow rate of 200 m³ / h.

[0015] The present invention adopts the above structure and has the following advantages: 1. The bin cleaning speed is fast. It is the best optimized configuration scheme for the water sump of modern large coal mines with a production capacity of tens of millions of tons, rapid excavation, kilometer pipeline transportation, high-efficiency dehydration, and an automated system to achieve rapid excavation, long-distance transportation, high-efficiency dehydration, an automated system, the largest processing capacity, and the highest efficiency. It is a domestic initiative and has very considerable economic benefits. 2. The transportation distance is up to one kilometer. The whole process is transported through a closed pipeline to the large belt conveyor, and then directly subjected to classified dehydration treatment, effectively recovering resources, avoiding environmental pollution and resource waste, and having obvious economic benefits. 3. The dehydration efficiency is high, maintenance-free, consumable-free, continuous operation, safe and reliable, without the need for long-term personnel on duty, truly achieving the goal of replacing people with machines and increasing efficiency by reducing the number of people, and having obvious social benefits. 4. The electric lifting operation platform is designed to prevent potential safety hazards during the bin cleaning process. The wading and mud-wading height reaches more than 3 m, and the equipment can self-rescue under the conditions of running bin, flooding, and emergency, ensuring the safety of people and machines, increasing the safety production operation coefficient, and greatly improving the work efficiency. 5. For the rapid excavation and loading equipment and the coal mine lifting and aggregate kilometer pumping equipment, according to the actual situation of each mine, the remote control operation or manual operation mode can be adopted. Each rapid excavation and loading equipment requires 1 operator. When the distance between the coal mine lifting and aggregate kilometer pumping equipment and the high-efficiency continuous coal slime dehydration equipment (high-efficiency continuous vibration cyclone coal slime dehydration equipment and high-speed centrifugal sedimentation separation equipment) is relatively close, only 1 operator is required to be responsible for starting / stopping and on-duty. For the whole operating system of water sump cleaning and coal slime dehydration, only 2 operators are needed (the traditional bin cleaning method generally requires about 8 - 10 workers), truly achieving the goal of replacing people with machines and increasing efficiency by reducing the number of people. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] In the figure, 1 is a rapid excavation and loading equipment; 2 is a coal mine lifting and aggregate kilometer pumping equipment; 3 is a closed conveying pipeline; 4 is a high-efficiency continuous vibration cyclone coal slime dewatering equipment; 5 is a mine transfer and feeding machine; 6 is a high-speed centrifugal sedimentation separation equipment; 7 is a tail water pipeline. Specific implementation mode

[0018] In order to make the technical means, technical features, invention purpose and technical effects achieved by the present invention easy to understand, the present invention will be further described below with reference to specific illustrations.

[0019] As Figure 1 shown, a large-scale coal mine sump rapid excavation, transportation and high-efficiency dehydration automation system includes a set of coal mine lifting and aggregate kilometer pumping equipment 2, a set of high-efficiency continuous vibration cyclone coal slime dewatering equipment 4, a set of high-speed centrifugal sedimentation separation equipment 6, a closed conveying pipeline 3, two sets of mine transfer and feeding machines 5 and at least two sets of rapid excavation and loading equipment 1; the closed conveying pipeline 3 is connected between the coal mine lifting and aggregate kilometer pumping equipment 2 and the high-efficiency continuous vibration cyclone coal slime dewatering equipment 4; A set of coal mine lifting and aggregate kilometer pumping equipment 2, a set of high-efficiency continuous vibration cyclone coal slime dewatering equipment 4, a set of high-speed centrifugal sedimentation separation equipment 6, two sets of mine transfer and feeding machines 5 and at least two sets of rapid excavation and loading equipment 1 cooperate to work, and the working sequence is rapid excavation and loading equipment 1, coal mine lifting and aggregate kilometer pumping equipment 2, high-efficiency continuous vibration cyclone coal slime dewatering equipment 4, high-speed centrifugal sedimentation separation equipment 6, wherein one set of mine transfer and feeding machine 5 is used to receive the slag produced by the high-efficiency continuous vibration cyclone coal slime dewatering equipment 4, and the other set of mine transfer and feeding machine 5 is used to receive the slag produced by the high-speed centrifugal sedimentation separation equipment 6; (1) Rapid excavation and loading equipment 1 The rapid excavation and loading equipment 1 adopts a loader mode and a split design. The rapid excavation and loading equipment 1 can be split into four major parts: a front-end aggregate mixing operation device, a four-wheel power drive device, an electric lifting operation platform and the remaining parts. The overall dimensions of the rapid excavation and loading equipment 1 are 8735*2996*3515mm, and its selection can be determined according to the transportation conditions of each mine and the sump excavation requirements; The front-end operation mechanism adopts a mechanical structure of a shovel loader bucket for lifting and an internal rapid mixing device, which can quickly rotate and stir the coal slime water precipitated and silted in the sump, thereby enhancing the fluidity of the coal slime water; The front-end working mechanism includes a scraping bucket, a stirrer, a lifting arm, and a bucket tipping device. The stirrer is driven by a driving device. The stirrer includes a stirring drum shaft and stirring blades. The stirring drum shaft and the stirring blades are arranged to rotate in the scraping bucket to rotate and stir the coal slime sedimented and silted in the sump, enhance the fluidity of the coal slime water, and quickly shovel the agitated coal slime slurry to the coal mine lifting and aggregate kilometer pumping equipment 2, and continuously supply materials to the coal mine lifting and aggregate kilometer pumping equipment 2 in a back-and-forth cycle; The driving device is a 170-kilowatt large-horsepower explosion-proof diesel engine, with front and rear wheel drive, a maximum designed vehicle speed of 40 km / h, strong excavation ability (scoop 5 m³), large driving force, good passing performance, and strong climbing ability (climbing angle ±18°); the driving device can be remotely controlled over a long distance and can drive the fast excavation and shoveling equipment 1 to realize the operation functions of starting and stopping, working switch, walking, reversing, stirring, lifting, lowering, tipping, telescoping, and emergency stop; All the electrical appliances and operating handles of the fast excavation and shoveling equipment 1 are designed and arranged on the electrical platform. There are four oil cylinders to support the lifting operation of the electrical platform. During the process of excavating the sump, situations such as sudden surging, running, and leakage of the sump may occur. The lifting device of the electrical platform can quickly lift and lower with one key to prevent the fast excavation and shoveling equipment 1 from being flooded. Once in danger, the fast excavation and shoveling equipment 1 can lift and lower with one key and quickly self-rescue, effectively ensuring the safety of people and machines and preventing safety accidents; (2) Coal mine lifting and aggregate kilometer pumping equipment 2 The coal mine lifting and aggregate kilometer pumping equipment 2 includes a front-end worm and gear slewing bearing, a rotating aggregate hopper, an aggregate protection device, a magnetic iron removal device, an aggregate hopper lifting oil cylinder, a hydraulic piston type pressurized pumping mechanism, a rigid crawler large torque hydraulic walking device, a hydraulic / electrical lifting platform, a manual / remote control operation device, and two groups of stirring and aggregating devices. The coal mine lifting and aggregate kilometer pumping equipment 2 also includes a 200 m³ / h emergency rescue hydraulic pump; Among them: The worm and gear slewing bearing is mainly responsible for driving the rotating aggregate hopper to rotate left and right to collect the coal slime on both sides of the roadway; The rotating aggregate hopper is mainly responsible for collecting and storing the coal slime slurry required by the coal mine lifting and aggregate kilometer pumping equipment 2; The stirring and aggregating device includes a hydraulic motor. The two groups of stirring and aggregating devices are mainly responsible for shoveling the coal slime slurry transported by the fast excavation and shoveling equipment 1 to rotate left and right and aggregate towards the middle and then into the rear rotating aggregate hopper through the two groups of hydraulic motors, and then connecting the rotating aggregate hopper and the coal mine lifting and aggregate kilometer pumping equipment 2 into one body through an 8-inch steel flexible connection. The purpose of using the steel flexible connection pipeline is to facilitate the left and right swaying of the rotating aggregate hopper to collect the coal slime in the roadway, and then through the coal mine lifting and aggregate kilometer pumping equipment 2, it is transported to the high-efficiency continuous vibration cyclone coal slime dewatering equipment 4 through the kilometer closed conveying pipeline 3 for continuous dewatering treatment of the coal slime slurry; The two groups of stirring and aggregating devices are independently driven by their respective hydraulic motors, and the rotational speed can be adjusted and set through manual / remote control operating devices. Aggregate protection device and magnetic iron removal device. According to the characteristics of a large amount of debris in the underground water sump of coal mines, two protection devices are specially added in front of the rotating aggregate hopper. The first one mainly protects against debris and large pieces of coal gangue, and the second one adds a magnetic iron removal device, mainly to protect the safe operation of the coal mine lifting aggregate kilometer pumping equipment 2 and the subsequent high-efficiency continuous vibration cyclone coal slime dewatering equipment 4. The lifting cylinder of the aggregate hopper is mainly responsible for the lifting, lowering, and bottom cleaning of the rotating aggregate hopper. It adopts an underfloor design (underfloor depth 90mm), which is applicable to the cleaning work of the complex ground of the water sump. Especially when excavating low bends, it has good passing performance, and the bottom cleaning is clean and thorough. The coal mine lifting aggregate kilometer pumping equipment 2 is designed with a hydraulic piston type supercharging pumping mechanism. This mechanism is driven by an electric motor through an elastic coupling to drive an axially series pump (referred to as an oil pump). The oil pump sucks low-pressure oil from the oil tank and then discharges high-pressure oil. The high-pressure oil enters the front or rear chamber of the hydraulic cylinder through a reversing valve, driving the piston of the hydraulic cylinder. The piston of the hydraulic cylinder drives the piston of the working cylinder to make continuous reciprocating movements. The coal slurry completes the slurry suction and discharge operations through the slurry inlet valve and slurry discharge valve of the working cylinder. The flow rate of this mechanism can be automatically switched between large displacement and small flow through the pressure of the oil pump, with an adjustment range of 0 - 240 m³ / h, and the maximum pump pressure can reach 2.5 Mpa. It has a large feed suction force, strong self-priming ability, and a self-priming power of 5 meters. The working cylinder and piston rod adopt a high-precision stainless steel cylinder liner, which is corrosion-resistant, wear-resistant, with a wear-resistant grade of M4, and the service life is increased by more than 10 times, having a significant effect on sand and solid particles. It can transport solid-liquid mixtures with a high concentration and a moisture content of more than 80%. It has high efficiency, with an operating efficiency of more than 95%. The tank cleaning speed is fast, and the pumping capacity can reach 100 m³ / h. The entire conveying pipeline is airtight, with a horizontal conveying distance of 2000 m and a vertical conveying distance of 200 m. The energy-saving pump has a maximum feed pressure of 20 kg and the pressure is adjustable, with a feed speed 30% higher than that of the existing slurry pump, greatly improving the working efficiency. The rigid crawler large-torque hydraulic walking device adopts a low-speed, large-displacement, large-torque, hydraulic motor-driven crawler walking method, with a large driving force, good passing performance, and a strong climbing ability (climbing angle ±25°). The hydraulic / electrical lifting platform is specially designed with a height of more than 3m to prevent the coal sludge from escaping and flooding the machine, which affects the excavation speed, according to the actual situation of the modern large-scale coal mine water bunker. The whole machine structure is relatively reasonable, in line with the actual situation on site, and has strong practicality. The electrical parts that are afraid of flooding are all arranged in a high position, and the lifting design (the muddy water height is ≥3m and can be lifted at any time) is equipped with an emergency rescue hydraulic pump of 200m³ / h to deal with the adverse factors such as water leakage caused by the water distribution gate not being closed tightly or "breaching and running" during the excavation of the water bunker. The safety factor of the operation is increased, the work efficiency is greatly improved, and the safety of people and machines is guaranteed, so as to achieve safe production of water bunker excavation; The manual / remote control device can realize all the operating functions including starting and stopping, working switch, material collection and conveying, forward and reverse pumping, walking, hopper raising, lowering and rotating; Working principle: The electric motor drives the hydraulic pump to provide the whole machine with hydraulic energy source for operation. Through the control of the hydraulic valve group, the left and right stirring hydraulic motors are driven to drive the spiral stirring wings to aggregate the coal sludge accumulated in the water tank to the middle, and the collected materials are transported backward to the rotating aggregate hopper of the lifting aggregate pumping equipment 2 for coal mines; the lifting aggregate pumping equipment 2 for coal mines pumps the coal sludge to the vibrating cyclone coal sludge dehydration equipment behind through the self-priming pipeline system for coal sludge dehydration treatment; Emergency safety measures: This machine is equipped with gas monitoring automatic power-off protection device, motor overcurrent / overheat protection device, hydraulic oil temperature overheat protection device, and emergency stop button protection devices on both sides.

[0020] The overall size of the machine is 6000*2000*2200mm, which can meet the needs of going down the well. The whole machine can be directly loaded into the tank cage and lowered into the well for rapid transfer. The whole machine can also be disassembled into two parts according to the needs of the site. The rotating aggregate hopper is disassembled as one part, and the hydraulic piston booster pumping mechanism and hydraulic / electrical lifting platform are disassembled as one part. (III) Vibration cyclone coal slime dehydration equipment The vibration cyclone coal slime dehydration equipment includes double vibration motors, double-layer vibrating screens, vertical mud pumps, collection boxes and four hydrocyclones. The vibration cyclone coal slime dehydration equipment has a processing capacity of 120m³ / h, a separation accuracy of 0.075mm, and a moisture content of coarse particle coal slime after separation of <35%; The vibrating screen of the double-layer vibrating screen is a wear-resistant and corrosion-resistant polyurethane-wrapped 304 stainless steel woven screen (304 stainless steel slat screen can be selected according to the coarseness of the coal slime on site); the lower screen is a coarse screen, which can be selected with 20 / 40 / 60 / 80 meshes and can be adjusted at any time according to the actual situation on site; the upper screen is a fine screen, which can be selected with 100 / 120 / 150 meshes and can be adjusted at any time according to the actual situation on site; The coal slurry delivered by the coal mine lifting aggregate kilometer pumping equipment 2 can first enter the large-capacity distribution box before being vibrated and screened by the high-efficiency continuous vibration cyclone coal slurry dehydration equipment 4, which can reduce the pressure shock of coal slurry pumping and distribute the material evenly, effectively improving the screening effect and extending the service life of the screen; The vertical mud pump sucks the coal slurry after the primary screening from the collection box, and after centrifugal acceleration and pressurization, it is tangentially injected into the slurry inlet of the hydrocyclone along the pipeline. After the secondary sorting of the hydrocyclone, the coal slurry sand particles with larger particle size in the coal slurry are discharged from the sand settling nozzle at the lower end of the hydrocyclone and fall into the upper fine screen. After dehydration and screening by the fine screen, the drier fine slag is separated; the mud screened by the fine screen is returned to the collection box again; After the secondary separation of the hydrocyclone, the tail water containing fine particles in the coal slime slurry is discharged from the overflow port in the middle of the hydrocyclone and sent to the high-speed centrifugal sedimentation separation equipment 6 through the pipeline (provided by the machine), and then the coal powder in the tail water is subjected to high-speed centrifugal dehydration treatment, and the treated coal slime is transported to the belt conveyor or trackless rubber-wheeled vehicle through the mining transfer feeder 5; The machine is equipped with an automatic float slurry filling valve, which can automatically fill or overflow according to the liquid level in the collection box, protecting the slurry pump from damage due to dry grinding without water or the collection box from overflowing and causing environmental pollution; A backwash branch is installed at the outlet of the vertical mud pump and connected to the collection box. Through the backwash branch, the slag material settled in the collection box can be disturbed to prevent the collection box from sedimentation and siltation due to long-term use, which will cause the effective capacity to decrease and overflow. The source of clean water required for the backwash branch is the responsibility of the mine owner (this equipment is equipped with a flushing valve and interface); (IV) High-speed centrifugal sedimentation separation equipment 6 The high-speed centrifugal sedimentation separation device 6 includes a main motor, an auxiliary motor, a differential, a transmission mechanism, a drum and a spiral device. The processing capacity of the high-speed centrifugal sedimentation separation device 6 is ≤130m³ / h, the effective processing volume is 108m³ / h, and the separation accuracy can reach 2-5um; High-speed centrifugal sedimentation separation equipment 6 working principle: The high-speed centrifugal sedimentation separation equipment 6 is a screw discharge sedimentation centrifuge, which includes a high-speed rotating drum, a screw conveyor with a hollow rotating shaft that rotates in the same direction as the drum and has a slightly lower rotational speed than the drum, a differential, a bearing housing, a housing, and a machine base. When the small-particle suspension to be separated is fed into the screw conveyor through the hollow rotating shaft, it is immediately thrown into the drum cavity and rotates at a high speed with the drum. Under the action of the strong centrifugal force generated by the high-speed rotation, the solid-phase particles with a density greater than that of the liquid phase are thrown and adhered to the inner wall of the drum, forming an annular solid layer (abbreviated as the solid ring layer). The liquid phase (usually water in most cases) forms a liquid layer (abbreviated as the liquid ring layer) on the inner side of the solid ring layer due to its small density and small centrifugal force. The rotational speeds of the screw conveyor and the drum are different, and there is relative motion between them (i.e., rotational speed difference). By using the relative motion between the screw conveyor and the drum, the sludge in the solid ring layer is slowly shoveled to the tapered end of the drum, and after being squeezed and dried, it is continuously discharged through the outlets circumferentially distributed at the tapered end of the drum. The liquid in the liquid ring layer is discharged continuously (overflowed) from the weir opening at the large end of the drum by gravity to the outside of the drum, forming a clarified separation liquid (tail water), and the tail water is discharged through the tail water pipeline 7. The centrifuge is driven by two motors and transmitted by two pairs of belt pulleys respectively. One pair of belt pulleys is connected to the drum, and the other pair is connected to the screw conveyor. Due to different transmission ratios, the drum and the screw conveyor rotate in the same direction but have a certain differential rotational speed. The drum and the screw conveyor rotate at a high speed in the same direction with a certain differential speed. The material is continuously introduced into the inner cylinder of the feeding screw conveyor through the feeding pipe, accelerated and then enters the drum. Under the action of the centrifugal force field, the heavier solid phase deposits on the drum wall to form a sediment layer. The feeding screw conveyor continuously shovels the deposited solid phase to the tapered end of the drum and discharges it outside the machine through the slag discharge port. The lighter liquid phase forms an inner liquid ring and continuously overflows from the overflow port at the large end of the drum and is discharged outside the machine through the liquid discharge port. The centrifuge can continuously feed, separate, wash, and discharge materials at full speed. The centrifuge has multiple differential speed adjustment modes: ① The differential speed is obtained by the co-rotation of two motors in the same direction, 40 - 50 r / min; ② When installing a differential speed fixing plate and driving the separator with a single motor, the obtained differential speed is twice the above differential speed; ③ When the two motors rotate in opposite directions, the obtained differential speed is three times that in the case of ① above; The greater the differential speed, the greater the processing capacity of the separator and the greater the water content; vice versa. Excellent energy-saving performance: When adjusting the discharge at a large differential speed with a high solid content, due to the lag of the screw, the auxiliary motor works in the regenerative braking state, and the regenerated energy is sent to the DC bus of the auxiliary frequency converter. Since the DC buses of the main and auxiliary frequency converters are connected in parallel, this energy is utilized by the main motor through the main frequency converter, saving energy and reducing consumption. High-precision and high-response differential speed and timely feedback adjustment can achieve constant torque control of the material-scooping screw, enabling continuous and stable discharging and clean tail water; wide-frequency auxiliary differential speed adjustment can easily handle the accumulation of materials in the drum caused by emergencies; Soft start control of the frequency converter can reduce the impact on the power grid and machinery, preventing system overload; A flushing branch interface and valve are installed at the feed inlet of the fine filtration equipment. After the front equipment stops, the flushing branch valve can be opened to allow clean water to enter the inside of the fine filtration equipment for flushing, avoiding inner wall caking and affecting the next use; the source and transportation of the clean water required for the flushing branch are the responsibility of the mine (the equipment is equipped with a flushing valve and interface); Electrical control part of the high-speed centrifugal sedimentation separation equipment 6: The electrical control of the high-speed centrifugal sedimentation separation equipment 6 mainly adopts the co-bus double-frequency converter speed regulation control. The speeds of the main and auxiliary motors are independently controlled by the main and auxiliary frequency converters, and their DC buses are connected in parallel. The three-phase power supply is input to the main frequency converter. This innovative design has the following advantages: Good separation effect, high operation efficiency. The speeds of the main and auxiliary motors are independently controlled by the main and auxiliary frequency converters, with high speed regulation control accuracy, fast dynamic response, good adaptability to the specific gravity of coal slurry, and suitable for various feeding working conditions; (5) Mine transfer and loading machine 5 The mine transfer and loading machine 5 is a multi-functional transfer equipment with left and right rotation, suitable for various working conditions. It is a screw conveyor and transfer mechanism that can move and be manually hydraulically lifted. Its transfer capacity is ≤80 m³ / h. The mine transfer and loading machine 5 includes a screw conveyor cylinder, a screw conveyor auger, a hopper, a chassis, a turntable, a manual hydraulic pump, a manual hydraulic cylinder, a motor, and a reducer; The mine transfer and loading machine 5 is generally arranged in the belt transportation gateway; when the coal slime (slag) separated by the vibrating cyclone coal slime dewatering equipment and the high-speed centrifugal sedimentation separation equipment 6 falls into the hopper of the mine transfer and loading machine 5 below through their respective discharge ports, it is then lifted to a high place through the screw conveyor and falls into the lower large belt conveyor (the large belt conveyor is the coal transportation belt conveyor in the mine gateway) or the rubber-tyred vehicle without rails. The large belt conveyor or the rubber-tyred vehicle without rails transports the coal slime (slag) to the coal bunker, and the clarified separation liquid (referred to as tail water) is discharged through the tail water pipeline 7; Embodiment: Sludge cleaning mode for water sump in a ten-million-ton large modern coal mine: An integrated operation system design plan for rapid sump cleaning (100 m³ / h), pumping through a thousand-meter pipeline (2000 m), efficient cyclone centrifugal dewatering (130 m³ / h), and coal slime transfer and transportation (80 m³ / h). It is a one-stop service for rapid sump cleaning, closed pipeline transportation over a thousand meters, and efficient slurry dewatering in the national coal system. It has the largest processing capacity and is currently the best sump cleaning optimization configuration plan in the country, which is a domestic initiative; During the clearance, first, the water inlet of the coal mine lifting and aggregate kilometer pumping equipment 2 is excavated. When the excavation from the water sump opening reaches about 15 m below the low bend, there is a certain storage space to accommodate the simultaneous operation of two sets of equipment. At this time, the coal mine lifting and aggregate kilometer pumping equipment 2 temporarily withdraws from the water sump. After the rapid excavation and loading equipment 1 enters the water sump first, the coal mine lifting and aggregate kilometer pumping equipment 2 then enters the water sump. When both sets of the above equipment reach the appropriate positions, remotely control or manually operate the rapid excavation and loading equipment 1 to stir the coal sludge that has settled in the water sump for the coal mine lifting and aggregate kilometer pumping equipment 2, and continuously stir and load the coal slurry; The coal mine lifting and aggregate kilometer pumping equipment 2 and the rapid excavation and loading equipment 1 are used in a supporting manner simultaneously. According to the actual situation of the modern large-scale coal mine water sump site, a set of practical construction plans are designed. Especially according to the law of coal sludge running out of the sump in the coal mine, corresponding countermeasures are studied and formulated. To prevent the coal sludge from running out of the sump and flooding the machine, affecting the excavation speed, the overall machine structure design is relatively advanced and reasonable, with strong practicability. The electrical parts that are afraid of being flooded are arranged at a high position and designed for lifting (the wading and mud-wading height is ≥ 3 m and can be lifted at any time). At the same time, a 200 m³ / h emergency rescue hydraulic pump is equipped to deal with the adverse factors such as water leakage, water accumulation or "running out of the sump" due to the improper closing of the water distribution gate during the excavation of the water sump. The safety production operation coefficient is increased and the work efficiency is greatly improved; The rapid excavation and loading equipment 1 adopts two operation modes: remote control and manual operation. According to the working needs of the coal mine lifting and aggregate kilometer pumping equipment 2, it shuttles back and forth between the water sump and the coal mine lifting and aggregate kilometer pumping equipment 2 to stir and load the coal slurry. When moving towards the water sump opening, lower the bucket of the rapid excavation and loading equipment 1, and while stirring, shovel the coal slurry water to the coal mine lifting and aggregate kilometer pumping equipment 2 to facilitate the aggregation and pumping of the coal mine lifting and aggregate kilometer pumping equipment 2. After reaching the coal mine lifting and aggregate kilometer pumping equipment 2, lift the bucket of the rapid excavation and loading equipment 1, and quickly retreat to the thick coal sludge area of the water sump, lower the bucket of the rapid excavation and loading equipment 1. The mixer in the bucket of the rapid excavation and loading equipment 1 can also rotate in both forward and reverse directions, and so on in a cycle to continuously provide coal sludge for the coal mine lifting and aggregate kilometer pumping equipment 2; The coal mine lifting and aggregate kilometer pumping equipment 2 operates fixedly or moves within a small range at the low bend of the water sump, stirs and aggregates the coal sludge shoveled by the rapid excavation and loading equipment 1, and transports it to the rear hopper. To prevent sundries in the water sump from entering the aggregate hopper, two protective nets are designed. The first one is used to prevent large particles and sundries, and the second one is a magnetic strip protective net; The coal mine lifting and aggregate kilometer pumping equipment 2 is equipped with a hydraulic piston type booster pump. The cleaning speed and pumping capacity can reach 100 m³ / h. The closed conveying pipeline 3 is airtight throughout. The pumping distance is 2000 m horizontally and 200 m vertically. The pumping inlet pressure is 20 kg. The coal mine lifting and aggregate kilometer pumping equipment 2 collects the incoming coal slurry through a rotating aggregate hopper. There is a large-capacity hydraulic piston type booster pump that self-sucks into the pump cavity, sucking and discharging in a cycle. There is a pumping mechanism that transports the coal slurry through pipelines to the high-efficiency continuous vibration cyclone coal slime dewatering equipment 4 and the high-speed centrifugal sedimentation separation equipment 6 located kilometers away for subsequent coal slurry dewatering treatment. The high-efficiency continuous vibration cyclone coal slime dewatering equipment 4 and the high-speed centrifugal sedimentation separation equipment 6 are respectively matched with a mine transfer loading machine 5 to transport the treated coal slime (slag) through the mine transfer loading machine 5 to the large belt conveyor or the trackless rubber-tyred vehicle and transport it away; The conclusion shows that: 1) For the coal slime in the sump (length 500 m * width 5 m * height 3 m = 7500 m³), using this system, it only takes 10 small shifts (8 hours / shift) to finish cleaning and excavation; 2) For the coal slime in the sump (length 1000 m * width 5 m * height 3 m = 15000 m³), using this system, it only takes 18 small shifts (8 hours / shift) to finish cleaning and excavation, and the economic benefits are very considerable.

[0021] It should be noted that the above-mentioned large horsepower explosion-proof diesel engine, steel flexible connection, hydraulic motor, distribution box, hydrocyclone, belt conveyor, trackless rubber-tyred vehicle, automatic floating ball slurry replenishing valve, gas monitoring automatic power-off protection device, motor overcurrent / overheat protection device, hydraulic oil temperature overheat protection device, and emergency stop button protection device are all applications of existing technologies.

[0022] The above is only a preferred embodiment of the present invention and is not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made to the content within the scope of the patent application of the present invention shall fall within the technical scope of the present invention.

Claims

1. A rapid cleaning, conveying and efficient dehydration automation system for large coal mine sump, characterized in that: It includes one set of coal mine lifting and aggregate kilometer pumping equipment (2), one set of high-efficiency continuous vibration cyclone coal slime dewatering equipment (4), one set of high-speed centrifugal sedimentation separation equipment (6), a closed conveying pipeline (3), two sets of mine transfer and feeding machines (5), and at least two sets of rapid excavation and loading equipment (1). The closed conveying pipeline (3) is connected between the coal mine lifting and aggregate kilometer pumping equipment (2) and the high-efficiency continuous vibration cyclone coal slime dewatering equipment (4). One set of the coal mine lifting and aggregate kilometer pumping equipment (2), one set of the high-efficiency continuous vibration cyclone coal slime dewatering equipment (4), one set of the high-speed centrifugal sedimentation separation equipment (6), two sets of the mine transfer and feeding machines (5), and at least two sets of the rapid excavation and loading equipment (1) work together, and the working sequence is the rapid excavation and loading equipment (1), the coal mine lifting and aggregate kilometer pumping equipment (2), the high-efficiency continuous vibration cyclone coal slime dewatering equipment (4), and the high-speed centrifugal sedimentation separation equipment (6). One set of the mine transfer and feeding machine (5) is used to receive the slag produced by the high-efficiency continuous vibration cyclone coal slime dewatering equipment (4), and the other set of the mine transfer and feeding machine (5) is used to receive the slag produced by the high-speed centrifugal sedimentation separation equipment (6).

2. The rapid dredging, conveying and efficient dehydration automation system for large coal mine sump according to claim 1, characterized in that: The rapid excavation and loading equipment (1) adopts a loader mode and a split design. The rapid excavation and loading equipment (1) can be split into four major parts: a front-end aggregate mixing operation device, a four-wheel power drive device, an electric lifting operation platform, and the remaining parts. The rapid excavation and loading equipment (1) includes a front-end operation mechanism, a drive device, an electric lifting operation platform, a solid non-track rubber wheel walking device, and a remote control device.

3. The rapid excavation, conveying and efficient dehydration automation system for large coal mine sump according to claim 1, wherein: The coal mine lifting and aggregate kilometer pumping equipment (2) includes a front-end worm and gear slewing support, a rotating aggregate hopper, an aggregate protection device, a magnetic iron removal device, an aggregate hopper lifting oil cylinder, a hydraulic piston type pressurized pumping mechanism, a rigid crawler large torque hydraulic walking device, a hydraulic / electric lifting platform, a manual / remote control operation device, and two sets of stirring and aggregating devices.

4. The rapid dredging, conveying and efficient dehydration automation system for large coal mine sump according to claim 1, characterized in that: The vibration cyclone coal slime dewatering equipment includes two vibration motors, a double-layer vibrating screen, a vertical mud pump, a collection tank, and four hydrocyclones. The processing capacity of the vibration cyclone coal slime dewatering equipment is 120 m³ / h, the separation accuracy reaches 0.075 mm, and the moisture content of the separated coarse particle coal slime is < 35%.

5. The rapid dredging, conveying and efficient dehydration automation system for large coal mine sump according to claim 1, wherein: The high-speed centrifugal sedimentation separation equipment (6) includes a main motor, a sub-motor, a differential, a transmission mechanism, a drum, and a spiral device. The processing capacity of the high-speed centrifugal sedimentation separation equipment (6) is ≤ 130 m³ / h, the effective processing volume is 108 m³ / h, and the separation accuracy can reach 2 - 5 μm.

6. The rapid dredging, conveying and high-efficiency dehydration automation system for large coal mine sump according to claim 1, characterized in that: The transfer capacity of the mine transfer and feeding machine (5) is ≤ 80 m³ / h. The mine transfer and feeding machine (5) includes a spiral conveying cylinder, a spiral conveying auger, a hopper, a chassis, a turntable, a manual hydraulic pump, a manual hydraulic cylinder, a motor, and a reducer.

7. An automated system for rapid dredging, conveying and efficient dehydration of large coal mine sump, as claimed in claim 2, wherein: The front-end working mechanism adopts a mechanical structure for the lifting of the scraper loader bucket. The front-end working mechanism includes a scraping and transporting bucket, a stirrer, a lifting arm, and a bucket tipping device for the scraper loader. The stirrer is driven by a driving device. The stirrer includes a stirring drum shaft and stirring blades, and the stirring drum shaft and the stirring blades are arranged to rotate in the scraping and transporting bucket.

8. An automatic system for rapid dredging, conveying and efficient dehydration of a large coal mine sump, according to claim 7, characterized in that: The driving device is a high-horsepower explosion-proof diesel engine. The driving device can be remotely controlled over a long distance and can drive the rapid dredging and transporting equipment (1) to realize the operation functions of starting and stopping, working switch, traveling, reversing, stirring, lifting and lowering, tipping, telescoping, and emergency stop.

9. An automated system for rapid cleaning, conveying and efficient dehydration of large coal mine sump, as claimed in claim 8, characterized in that: The electric lifting operation platform is supported by four oil cylinders to achieve lifting operations.

10. An automated system for rapid dredging, conveying and efficient dehydration of large coal mine sump, as claimed in claim 3, wherein: The coal mine lifting and aggregate kilometer pumping equipment (2) further includes an emergency rescue hydraulic pump with a flow rate of 200 m³ / h.

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