320results about "Propulsion" patented technology

The invention relates to a deep-ground well hole type flexible mining device and a using method thereof.The deep-ground well hole type flexible mining device comprises an equipment channel well communicated to a mining position, detection equipment and a flexible mining machine, and a power line of the flexible mining machine is connected with a power source outside the well; the flexible mining machine comprises a crushing device for excavating ores and an advancing driving device, the crushing device comprises an expansion arm, a crushing assembly and a crushing power assembly, the advancing driving device comprises a device body, and the device body and the expansion arm are connected in a hinged or rotary connection mode and can relatively move in at least two freedom degree directions. And the expansion arms and the device body are folded and unfolded, so that the flexible mining machine can be switched between a first state of passing through the equipment channel well and a second state of performing mining work. The mining operation can be carried out under the condition that personnel do not need to descend into a well, the mining requirements of a deep bottom layer and a seabed bottom layer can be met, and the mining difficulty and the mining cost are reduced.

An integral frame-type machine body structure of a coal mining machine, and an integral frame-type intelligent coal mining machine. A structure in which an integral frame-type framework is welded to articulated frames is adopted, and the frame-type framework is configured to be of a transverse drawer-type structure, thereby achieving high interchangeability. The articulated frames are symmetrically distributed on a left side and a right side of the frame-type framework and are welded and connected to the frame-type framework; and a top plate (16) and a bottom plate (14) are fixedly arranged at an upper part and a lower part of the frame-type framework, respectively, external traction transverse plates (9) are fixedly arranged on the left side and the right side of the frame-type framework, and several intermediate vertical plates are fixedly arranged between the top plate (16) and the bottom plate (14), which are located an upper side and a lower side of the frame-type framework, to divide same, so as to obtain a plurality of cavities. The modularization rate of the coal mining machine is improved, thereby improving the interchangeability, facilitating underground maintenance and overhaul, and enhancing the matching adaptability; in addition, the force-bearing condition of the coal mining machine during the working process is improved, and the reliability of a transmission system of the coal mining machine is enhanced.

The invention relates to the technical field of coal mine intellectualization, and provides an inter-face coal pillar digging and mining robot which comprises a right-angle turning scraper conveyor and a digging and mining robot body. The digging and mining robot is mounted on the right-angle turning scraper conveyor; the digging and mining robot comprises a cutting system, and the cutting system is located on a machine body of the digging and mining robot. Wherein the cutting system is driven by the electric cylinder to move, and vertical cutting of a rectangular section is completed through compound movement of the feeding electric cylinder and the height adjusting electric cylinder; after the cutting action is completed, a walking system of the digging and mining robot moves by one cut width along the right-angle turning scraper conveyor, and the actions are repeated until the whole section is pushed by one cut distance; wherein in the cutting process, the fallen coal is transferred into the right-angle turning scraper conveyor; the stability of the cutting system in the cutting and walking process is ensured through the anti-overturning effect of the guide sliding shoes in the walking system of the digging and mining robot and the force effect of the hydraulic support matched with the right-angle turning scraper conveyor.

The utility model discloses a coal mine heading machine which comprises a crawler, a cleaning mechanism and a connecting frame, the cleaning mechanism is installed on the frame wall of the connecting frame, the cleaning mechanism is composed of a push plate, a transverse plate, a motor B, a vertical rod, a scraper blade, a positioning rod and a bearing, the push plate is welded to the frame wall of the connecting frame, and the motor B is installed on the transverse plate. A set of symmetrical transverse plates are installed on the plate wall of the push plate through bolts, a motor B is fixedly installed at the plate top of each transverse plate through bolts, a vertical rod is installed at the output end of each motor B, a scraper for cleaning coal is installed at the other end of each vertical rod, and a positioning rod is welded to the plate bottom of each scraper. And the other end of the positioning rod is connected with the plate wall of the push plate through a bearing. The cleaning mechanism can be used for cleaning coal cinder after tunneling, so that the coal cinder is prevented from being accumulated to influence the walking of the tunneling machine.

The invention belongs to the field of mining equipment and is a crushing coal mining equipment. The crushing coal mining equipment includes a chassis, a power chamber is provided in the lower side wall of the chassis, a power device is provided in the power chamber, and the power device is used to provide movement for the crushing coal mining equipment. A rotating table is provided on the upper side wall of the chassis, and a mining device is provided on the rotating table. The mining device is used to knock down and crush the coal that has been consolidated on the mine wall. The invention is simple to operate, and can remotely control coal mining without the need for personnel to operate on site, thereby protecting the lives of miners. It can be crushed in a wide range at multiple angles. A crushing device is installed in the shovel plate, and the collected coal can be further crushed for easy transportation. A cooling device is installed to avoid sparks and explosions during the crushing process. It is small in size and adopts a crawler structure. The overall structure is flat, which is conducive to working in narrow and rugged areas.

The invention belongs to the technical field of mining machinery, and provides a coal cutter sliding shoe bionic wear-resistant structure design and service life prediction method in order to solve the problem that traditional sliding shoe surface design mainly depends on material selection and simple geometric structure optimization. A bionic coal mining machine sliding shoe is obtained through bionic technology design, the abrasion loss of the bionic coal mining machine sliding shoe and the smooth surface sliding shoe is obtained through an abrasion loss comparison experiment, modeling simulation is conducted on the bionic coal mining machine sliding shoe and the smooth surface sliding shoe, and abrasion nodes obtained through the abrasion loss and simulation are calculated. According to the method, the wear rate of the skid shoe of the bionic coal mining machine and the wear rate of the skid shoe on the smooth surface are obtained, the service life of the skid shoe of the bionic coal mining machine is predicted, the bearing capacity of the surface of the skid shoe of the bionic coal mining machine is improved, and a design thought is provided for durability and long-term stability of the skid shoe of the coal mining machine.

The invention relates to the technical field of hard rock excavation, in particular to hard rock multi-source mutagenesis cutting increase and multi-mode non-explosive mechanical excavation equipment and a hard rock multi-source mutagenesis cutting increase and multi-mode non-explosive mechanical excavation process. The excavation equipment comprises a walking device, and a cutting device, an excavation device, a recovery device and a cutting increase device which are all mounted on the walking device; a digging head of the digging device comprises a multi-stage cutter head telescopic structure, an impact rock breaking structure is arranged on an inner cutter head, a rolling rock breaking structure is arranged on an outer cutter head, and the multi-stage cutter head telescopic structure stretches out and draws back to achieve alternate protruding of the impact rock breaking structure and the rolling rock breaking structure. The driving mechanism drives the excavating arm to move to achieve three-dimensional movement of the excavating head and rotation around the axis of the excavating arm. According to the cutting device, the pre-cutting groove extending transversely is pre-cut in the bottom of the tunnel face, the overall strength of the tunnel face rock mass is remarkably reduced, pre-cracking weakening is conducted on the tunnel face rock mass through the cutting increasing device, the hard rock cuttable performance is improved, hard rock crushing is achieved through the rolling and impacting combined rock breaking effect, and the cutting strength of the tunnel face rock mass is improved. The device is suitable for hard rock excavation.

The invention relates to multi-roller continuous mining equipment suitable for a large mine, and belongs to the technical field of mining equipment. Comprising a rack base plate, a lower cutting device and an upper cutting device, crawler side chassis are symmetrically and fixedly arranged on the left side and the right side of the rack base plate, crawler walking devices are fixedly connected to the outer sides of the crawler side chassis, side supporting plates are fixedly connected to the upper ends of the crawler side chassis, and a rack top plate is fixedly connected to the upper ends of the side supporting plates; two sets of discharging grooves distributed left and right are formed in the upper surface of the top plate of the rack in a penetrating mode. The method has good adaptability, can adapt to various ore types, and is not limited by ore body shapes and geological conditions. And the rocks are mechanically crushed, so that the potential safety hazards such as vibration, flying rocks and noise during blasting operation are avoided, and the operation safety is greatly improved. By arranging the lower cutting device and the upper cutting device and adopting a mining mode of synchronously and continuously breaking rocks in an upper area and a lower area, rock breaking operation can be carried out in multiple areas at the same time, and the ore breaking efficiency is greatly improved.

The invention discloses a double-drum self-adaptive cutting head of a coal mining machine, which comprises a main cutting drum, an auxiliary cutting drum, a transmission case, a crawler belt cutting part, an automatic telescopic mechanism, a first-section drill rod box and the like, and is combined with a driving part of a long-distance spiral drill rod coal mining machine for use. The spiral drill rod drives the main cutting roller to conduct rotary cutting through the bevel gear transmission system, the main cutting roller drives the auxiliary cutting roller to conduct rotary cutting through the chain transmission system, the auxiliary cutting roller adjusts the coal mining height through the automatic telescopic mechanism on the rear portion, and the pneumatic spring system is arranged on the automatic telescopic mechanism. The height of the auxiliary roller can be automatically adjusted according to fluctuating changes of a coal seam, and the coal mining height of the coal mining machine can be adjusted in a self-adaptive mode. The cutting head provided by the invention can effectively cope with fluctuating complex coal seams with the thickness between 0.5 m and 1.3 m, effectively solves the problem of corner coal retention of a traditional drilling type coal mining machine, improves the coal mining efficiency and the resource recovery rate, and adopts a drill rod box mode to reduce the damage of the coal mining machine to a coal roadway bottom plate.

A coal mine fully-mechanized heading machine. The coal mine fully-mechanized heading machine comprises a vehicle body (1), a dust collection assembly (2), and a collection assembly (3). The vehicle body (1) comprises a cutting arm (11), and the cutting arm (11) is provided with a mounting table (13). The collection assembly (3) comprises a dust extraction part (31), an air induction part (32), and a collection pipe (33); the collection pipe (33) is internally provided with a collection channel; the collection channel comprises a first inlet (331) and a first outlet (332); the collection channel is communicated with a dust collection cavity by means of the first inlet (331); the dust extraction part (31) is arranged at the first inlet (331); and the air induction part (32) is arranged at the first outlet (332). The collection pipe (33) comprises at least one U-shaped section (333); the U-shaped section (333) comprises a first sub-section (3331), a second sub-section (3332), and a baffling section (3333); the first sub-section (3331) and the second sub-section (3332) are communicated by means of the baffling section (3333); and both the first sub-section (3331) and the second sub-section (3332) extend in a first direction.

A transverse cutter head for a mining machine has an outer surface including a plurality of cutting tools. Tips of the plurality of cutting tools define a virtual contour line when viewed in a cutter boom longitudinal direction and a rotation of the cutter head is considered. The contour line is formed by at least four sections, namely a first section, a second section, a third section and a fourth section. The four sections are located adjacently in this order, wherein the first section is located closest to the cutter boom and the fourth section forms a side wall cutting area. The first section and / or the fourth section run substantially straight. Each one of the first section, the second section, and the third section has a pitch angle different from the pitch angle of the other two sections. A roadheader having such a cutter head is also provided.

A multi-parameter pressure relief drilling rig and method for monitoring impact danger while drilling, relating to the field of mining engineering technology. The pressure relief drilling rig includes a coal dust collection device, a crawler walking device, an analyzer, a drilling device, a monitoring device, a fixed bracket, a support, a drill rod, a control console and a temperature sensor. Each component cooperates with each other to complete the monitoring of rock burst danger and the pressure relief and danger relief in dangerous areas; during the drilling process, the drilling rig monitors multiple parameters such as coal dust temperature, drilling speed, torque, coal dust particle ratio and drilling time, and transmits them to the analysis instrument through wireless transmission, and integrates and determines the rock burst danger; when the monitoring results show that there is an impact danger, large-diameter drilling pressure relief can be directly carried out near the location to achieve the purpose of real-time danger relief, and at the same time, the drilling parameters are monitored in real time during the drilling process. This method realizes the combination of monitoring and pressure relief, and has the advantages of convenient operation, accurate monitoring and high safety.

The invention relates to the field of mine quarrying equipment, and discloses a mine quarrying machine capable of cutting mine raw stones, the mine quarrying machine comprises a machine body which is used as a supporting carrier of the whole device, and one side of the top end of the machine body is provided with a placing box for loading the mine raw stones; the multi-angle cutting assembly is installed on one side of the top of the machine body and used for conducting multi-angle cutting treatment on mine raw stones; the multi-angle cutting assembly is used for cutting ore, the grabbing assembly is installed outside the multi-angle cutting assembly and used for grabbing the cut ore and then placing the cut ore in the containing box, and the dust falling assembly is installed on the outer side of the multi-angle cutting assembly and used for conducting dust falling treatment on dust generated in the mine raw stone cutting process. By additionally arranging the multi-angle cutting assembly, multi-angle cutting can be conducted on mine raw stones, so that the cutting flexibility and accuracy can be remarkably improved, compared with a traditional cutting method which is usually limited to a single angle, the utilization rate of the raw stones can be reduced, and comprehensive utilization of the raw stones is achieved.

Disclosed are systems and methods to bore or tunnel through various geologies in an autonomous or substantially autonomous manner including one or more non-contact boring elements that direct energy at the bore face to remove material from the bore face through the fracture, spallation, and removal of the material. Systems can automatically execute methods to control a set of boring parameters that affect the flux of energy directed at the bore face. Systems can further automatically execute the methods to: monitor, direct, maintain, and / or adjust a set of boring controls, including for example a standoff distance between the system and the bore face, a temperature of exhaust gases directed at the bore face, a removal rate of material from the bore face, and / or a thermal or topological characterization of the bore face during boring operations.

The invention relates to the technical field of mining, in particular to a continuous drilling device for mining, which comprises a base, a crawler walking mechanism, a protective shell, a mining cutterhead, a transmission mechanism, an adjusting mechanism and a linkage control mechanism, the crawler walking mechanism is arranged at the bottom of the base, and the protective shell is arranged at the top of the base; one side of the base is connected with a mining cutter head used for mining a gold mine, the transmission mechanism is used for driving the mining cutter head to rotate, a worm and a worm wheel are meshed and linked, and through the synergistic effect of a connecting rod structure, a sliding block can drive the mining cutter head to move in a guide frame, and real-time adjustment of radial displacement of the mining cutter head is achieved. The path deviation can be corrected without shutdown, the transmission structure can bear high-frequency angle adjustment under heavy-load torque, an additional power source is not needed, the transmission structure is economical and efficient, linkage of the connecting rod assembly and the worm gear is controlled in real time through the linkage control mechanism, and rapid decoupling of the worm gear and the connecting rod structure is achieved.

The invention relates to a chain belt auxiliary traction device for a large-dip-angle coal face, and discloses a chain belt auxiliary traction device for a large-dip-angle coal face. According to the chain belt auxiliary traction device, a coal mining machine is driven to move in the mode that a winding storage shaft on one side in a winding assembly tightens a traction rope and the other side of the winding assembly loosens; and a winding storage shaft is fixed through a hydraulic cylinder and a limiting clamping column, so that stable coal mining operation is realized. The device is characterized by comprising a winding assembly, an adjusting assembly and a coal mining machine, the adjusting assembly is arranged on the winding assembly, the coal mining machine is fixedly connected with the winding assembly, the winding assembly can drive the coal mining machine to move, and a traction rope can be evenly distributed and wound on the surface of a winding storage shaft through the adjusting assembly; the winding assembly is composed of a positioning base plate, a fixing plate, a power motor, a winding storage shaft, a baffle, a positioning groove, a limiting clamping column, a connecting plate, a hydraulic cylinder, a traction rope and a Hall sensor.

The application discloses a kind of protective devices for coal mining and its use method, including support seat, the left side of the support seat is fixedly connected with connecting box, the inner cavity of the connecting box is provided with cylinder, the output end of the cylinder is penetrated to the outside of connecting box and is fixedly connected with first locating plate.The application is used for stably supporting coal mining machine by support seat, through the cooperation of cylinder, first locating plate, first movable rod, second movable rod, gear teeth and second locating plate, the second locating plate and the first locating plate are in contact with coal mining machine, and then the positioning of coal mining machine is completed, the stability of coal mining machine during operation is ensured, the situation of coal mining machine falling is effectively improved, and the problem that the coal mining machine is directly placed on the protective plate during use without positioning treatment, so that the coal mining machine will slowly shift due to vibration during operation, and then the situation of falling and failure will occur, thereby the entire coal mining work will be interrupted.

The invention discloses an ultra-thin seam coal mining machine external traction device which comprises a driving wheel shaft, a chain wheel, a spacer sleeve, a guide shoe, a first external traction assembly, a second external traction assembly and a positioning pin, the driving wheel shaft is sleeved with the chain wheel, the driving wheel shaft is sleeved with the spacer sleeve and abuts against the chain wheel, and the guide shoe is sleeved with the front end of the guide sleeve; the first outer traction assembly is rotatably arranged at the rear end of the spacer sleeve, the second outer traction assembly is rotatably arranged at the front end of the driving wheel shaft, and the first outer traction assembly and the second outer traction assembly are connected through a positioning pin. The chain wheel is compact in overall structure and convenient to mount and dismount, the overall length of the chain wheel is effectively shortened, meanwhile, the stress condition of the chain wheel is improved, the chain wheel only bears driving acting force, and the service life of the chain wheel is effectively prolonged.

An interface between a guide shoe of a mining machine and a rack includes a first surface positioned on the guide shoe. and a second surface positioned on the rack. At least one of the first surface and the second surface including a profile oriented at an oblique angle relative to a plane of the rack.

The present application relates to a kind of automatic tow cable system of coal mining machine, the space in cable trough is divided into three layers by layered board assembly, the lower part of tow cable trolley and bundle cage tow rope device is located in middle layer and can only reciprocate along the length direction of cable trough, bundle cage tow rope device is fixed relative to coal mining machine, steel wire rope is threaded along the length direction of cable trough, one end of steel wire rope is wound around the fixed pulley at the head of scraper conveyor, changes direction and then connected with bundle cage tow rope device, the other end is wound around the fixed pulley at the tail, then wound around the movable pulley of tow cable trolley, changes direction again, then returns to the tail and is fixed, cable clamp plate group is connected on coal mining machine at one end, is fixed at the head at the other end, middle part is wound around the roller of tow cable trolley and passes through bundle cage along the length direction of cable trough, the relative position of head and tail can be interchanged.The present application does not need external input power, with guide, upper layer cable clamp plate group will not fall, steel wire rope will not be thrown out, and safety is good.

The utility model relates to the technical field of mining equipment, in particular to a mining heading machine which comprises a heading machine body, a rotating mechanism is arranged on the heading machine body, and a cantilever is rotationally connected to the rotating mechanism. A first motor is arranged in the cantilever; a tunneling drill bit is arranged at the output end of the first motor; vertical supporting rods are symmetrically arranged on the two sides of the cantilever, the bottom end of each supporting rod is connected with the cantilever, the top end of each supporting rod is connected with a protection plate, the protection plate comprises a bottom plate, and the bottom plate is rotationally connected with a rotating plate through a connecting shaft; a shielding mechanism is arranged on the outer side of the cantilever and rotationally connected with two rotating rollers. And one end of the shielding net is wound on one rotating roller, and the other end of the shielding net penetrates through a gap between the bottom plate and the rotating plate and then is wound on the other rotating roller. According to the utility model, broken stones falling from the mine top can be blocked, guided and discharged, the risk that the broken stones crush a cantilever or clamp a mechanical structure at the front end of the heading machine is reduced, and the working efficiency and the safety of mining heading are improved.

The invention discloses an ultra-thin coal seam coal mining machine which is used for mining coal on a coal wall and conveying mined coal briquettes to a designated area through a scraper conveyor. The ultrathin coal seam mining machine comprises an electric cabinet, a left traction part and a right traction part which are respectively arranged at the left end and the right end of the electric cabinet, a left rocker arm and a right rocker arm which are respectively arranged on the left traction part and the right traction part, and a left roller and a right roller which are respectively arranged on the left rocker arm and the right rocker arm, the left rocker arm and the right rocker arm are respectively arranged above the scraper conveyor in a crossing manner, so that the space above the scraper conveyor is fully utilized, the space between the left roller and the right roller is prevented from being occupied by the left rocker arm, the right rocker arm and internal structures of the left rocker arm and the right rocker arm, and a machine passing channel does not need to be cut in advance when the coal mining machine is used; the problem that the lifting height of the rocker arm located behind is limited by coal left above the coal mining machine does not exist, it is guaranteed that the range of the whole mining height of the coal mining machine at a time is larger, and the application scene and the coal mining efficiency of the coal mining machine are improved.

The mining robot comprises a stabilizing mechanism and a driving base installed at the bottom of the stabilizing mechanism, the top of the stabilizing mechanism is provided with a mining mechanism, one side of the mining mechanism is provided with a collecting box, and the stabilizing mechanism comprises a stabilizing rotating disc. Reinforcing blocks are symmetrically installed on the two sides of the top of the stable rotating disc, stable supporting frames are fixedly installed on the front face and the two sides of the stable rotating disc, vertical sliding rods are slidably connected into the stable supporting frames, and vertical sliding sleeves are slidably connected to the outer sides of the vertical sliding rods; a first spring is fixedly mounted at the top of the vertical sliding sleeve, the vertical rotating rod is driven by the telescopic air cylinder to rotate around the end of the horizontal connecting rod, and the horizontal connecting rod and the fixed ground insert move downwards under the elastic action of the first spring and a second spring, so that the fixed ground insert can be inserted into soil. And stable supporting of the stable rotating disc is achieved.

The present invention relates to a large-mining-height single-drum short-wall coal mining machine and its coal mining process. The body of the coal mining machine is a rectangular box structure. Most of the double-traction walking mechanism is arranged in the box of the body. The cutting device is arranged above the body. The cutting device includes a cutting drum, a first-level large rocker arm, a second-level small rocker arm and a push cylinder. The first-level large rocker arm and the second-level small rocker arm can swing at a fixed point. The combination and adjustment of the two can obtain different heights of the cutting device to meet the requirements of large mining height. The coal mining process is to make the coal mining machine move back and forth between the head and tail of the conveyor for many times while cutting coal. Before each movement, the cutting drum is adjusted to different heights. After each adjustment, the area occupied by the cutting drum in the height direction can cover the full height of the coal seam of the coal wall, so that the full height can be mined after multiple round trips. The present invention can meet the comprehensive mining needs of mining the full height of the coal seam of the special thick short-wall working face of 5m and above at one time.

The application discloses a short-body fully-mechanized excavator for coal mine tunneling, which comprises a rack, a walking part, a shovel plate part, a cutting part and a conveyer scraper; the rack is connected with the track assembly of the walking part through a rotating mechanism; the cutting part comprises a folding cutting arm and a transverse shaft type cutting head; one end of the cutting arm is hinged to the rack, and the other end of the cutting arm is fixed with the cutting head; the shovel plate part is connected to the front end of the rack; one conveyer scraper passes through and is arranged on the track assembly; the front end and the tail end of the conveyer scraper extend to the front end of the rack and the tail end of the rack respectively. Advantages: the body is greatly reduced compared with the conventional machine type, and is suitable for narrow lane, sharp turning, continuous mining and continuous charging working face branch lane frequent opening scene; through the adjustment of the coal conveying direction of the conveyer scraper, the rack rotation and the linkage of the cutting arm, the rapid opening operation and continuous transportation of the lane are realized, and the construction efficiency is greatly improved.

The present invention provides a highly adaptable integrated digging and anchoring machine with a dual-mode anchor drilling system, which belongs to the technical field of underground coal mining equipment, including a frame body, a cutting system, a conveying system, a dust removal system, a multifunctional temporary support system, a dry-wet dual-mode anchor drilling system, an automatic lubrication system, a water-cooled spray system, a hydraulic system, and an electronic control system. The walking mechanism adopts a wide crawler design, which improves the adaptability of the integrated digging and anchoring machine to muddy bottom plates; the dry-wet dual-mode anchor drilling system has two functions, dry dust removal and wet dust removal, and performs real-time switching selection according to the geological conditions of the tunnel bottom plate, and does not require the replacement of the drill box. The present invention improves the problems of muddy bottom plates, poor stability of the top and side walls, and low digging efficiency faced by rapid excavation of coal tunnels under complex geological conditions; realizes the integrated parallel operation of excavation, anchoring, transportation, dust removal, etc. of the tunnel excavation working face; and improves the efficiency and safety of coal mining and transportation.

The present invention relates to a guide and traction system for a short-span, thin-seam coal mining machine, comprising a guide device, a traction connection device, and a scraper conveyor. The guide device comprises a guide shoe and a track, the track being laid in a straight line in the left-right direction. The guide shoe is mounted near the rear of the machine body and supports the machine body from below. The guide shoe straddles the track through its guide groove and is slidably connected to the track. The traction connection device comprises a connecting plate, a connecting hook, a chain trough body, and a traction chain. One end of the connecting plate is hinged to the machine body, and the other end of the connecting plate is hinged to one end of the connecting hook. The hinge axes of these two hinges extend left and right. The other end of the connecting hook is configured as a cylindrical structure with a left-right extending axis. The cylindrical structure is disposed in the chain trough and is slidably connected thereto. The traction chain is connected to the cylindrical structure. The track and the chain trough body are both mounted on the trough body of the scraper conveyor. The present invention can solve the wear problem of chain traction in thin or extremely thin coal seam coal mining machines.

The present disclosure relates to a control method, device and system of a coal mining machine traction system, belonging to the field of coal mining machines. The method is applied to a controller in the coal mining machine traction system. The method comprises: detecting the voltage value of a DC bus in real time; in response to the voltage value being lower than a first preset threshold, obtaining voltage fluctuation information within a preset time period; determining the predicted duration of DC bus under-voltage according to the voltage fluctuation information, and comparing it with a first target duration; in the case where the predicted duration is determined to be less than the first target duration, controlling the output frequency of the frequency converter according to the voltage fluctuation information to perform PID adjustment on the speed of the traction motor, thereby controlling the traction motor to generate power at a reduced speed and feeding the generated power of the traction motor back to the DC bus through the inverter module to maintain the voltage of the DC bus. The robustness of the coal mining machine traction system under under-voltage conditions is ensured, and the reliable production of the coal mining machine traction system is guaranteed.

The invention provides a vibration type milling device, which is used for executing the operation of engineering machinery, and comprises a vibration excitation mechanism (10) for generating vibration; the vibration excitation mechanism (1) is used for exciting a stratum, and the milling mechanisms (20 and 30) are used for milling the stratum and connected with the vibration excitation mechanism (1) to vibrate along with vibration of the vibration excitation mechanism (1). The vibrating type milling device is detachably connected with the main machine (1).

A long arm type compact wheel bucket excavator relates to mechanical equipment for open pit mining, comprising a supporting mechanism, a bucket wheel driving mechanism, a discharging arm rotating mechanism, a crawler walking mechanism and a tensioning mechanism, the discharging arm rotating mechanism comprising a main machine walking mechanism, a supporting base assembly, a rotating platform assembly and an adjusting plate assembly; the supporting base assembly comprising a central pipe vertically fixed on the main machine walking mechanism and a mounting seat fixed on the central pipe; the rotating platform assembly comprising a rotating platform rotatably supported on an L-shaped beam; the adjusting plate assembly comprising an adjusting plate body, a lower connecting shaft slide way symmetrically arranged on both sides of the adjusting plate body and an upper connecting shaft slide groove symmetrically arranged on the other two sides of the adjusting plate body, the guide directions of the lower connecting shaft slide way and the upper connecting shaft slide groove being perpendicular to each other. The wheel bucket excavator does not need to additionally set a reclaimer and will not generate triangular coal, and has the advantages of good stress characteristics, good safety and the like.