382results about "Cutting machines" patented technology

In one aspect of the present invention, a drill string has a drill bit with a body intermediate a shank and a working face. The working face has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working face. At least one blade has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry. The diamond working end also has a central axis which intersects an apex of the pointed geometry. The axis is oriented between a 25 and 85 degree positive rake angle.

The vertical feeding coal mining machine comprises a rack, a traction part and a cutting assembly, the traction part is connected with the rack so as to be used for dragging the rack to move, the cutting assembly comprises a roller body and cutting teeth, the roller body comprises a cylinder body, an end disc and an end cover, the end disc is arranged on the cylinder body, and the cutting teeth are arranged on the end disc. The end disc is arranged on the outer circumferential wall of the roller body in a sleeving mode, the end disc and the first end of the roller body are arranged in a flush mode, the end cover is connected with the inner circumferential wall of the roller body, a groove is defined between the end cover and the roller body, the multiple cutting teeth are arranged in the circumferential direction of the center line of the roller body at intervals, and the cutting teeth are arranged in the groove. One part of the plurality of cutting teeth is connected with the end disc, and the other part of the plurality of cutting teeth is connected with the end cover. According to the vertical feeding coal mining machine, the arrangement positions of the cutting picks are optimized, the possibility of abrasion of the cutting picks is reduced, and the cutting efficiency is improved.

The invention relates to the technical field of thin seam mining equipment, in particular to a thin seam mining machine which comprises a driving assembly, a transmission assembly, a machine body, a first cutting assembly and a second cutting assembly, and the first cutting assembly and the second cutting assembly are arranged on the two sides of the machine body in the extending direction. The driving assembly and the transmission assembly are arranged in the machine body, the driving assembly is arranged between the first cutting assembly and the second cutting assembly, the input end of the transmission assembly is connected with the output end of the driving assembly, and the first output end of the transmission assembly is connected with the input end of the first cutting assembly; and the second output end of the transmission assembly is connected with the input end of the second cutting assembly. According to the thin seam coal mining machine, the single motor is arranged to drive the rollers on the two sides, the size of the coal mining machine is reduced, and the coal mining flexibility is improved.

The coal mining machine roller comprises a roller body and a cutting tooth assembly, the roller body comprises a cylinder body, an end disc and an end cover, the end disc is arranged on the peripheral wall of the cylinder body in a sleeving mode, the end disc is flush with the first end of the cylinder body, the end cover is connected with the inner peripheral wall of the cylinder body, the cutting tooth assembly is arranged on the inner peripheral wall of the cylinder body, and the cutting tooth assembly is arranged on the inner peripheral wall of the cylinder body. A groove is defined between the end cover and the roller body, the cutting tooth assembly comprises a plurality of cutting teeth, the plurality of cutting teeth are arranged at intervals in the circumferential direction of the center line of the roller body, one part of the plurality of cutting teeth is connected with the end disc, and the other part of the plurality of cutting teeth is connected with the end cover. According to the roller of the coal mining machine, the arrangement positions of the cutting picks are optimized, the possibility of abrasion of the cutting picks is reduced, and the cutting efficiency is improved.

The invention discloses an impacting-splitting-cutting composite rock breaking configuration of a cantilever type heading machine, relates to the field of coal mine underground heading equipment, and solves the problems of low efficiency, serious cutting pick abrasion, poor stability and insufficient adaptability of an existing heading machine during hard rock operation. A multi-stage cylinder executing mechanism is arranged on a cutting arm of the heading machine, an angle adjusting rotary table is arranged at the upper end of the multi-stage cylinder executing mechanism, and a breaking hammer and a rock cracking machine are arranged on the angle adjusting rotary table; the angle adjusting rotary table comprises a track plate and a rotary table, and the rotary table drives the track plate to rotate; a breaking hammer is arranged at one end of the track plate, and a rock cracking machine is arranged at the other end. The breaking hammer and the rock cracking machine are integrated at the front end of the heading machine, pre-broken rock can be split, the number of times of breaking is reduced, vibration and noise caused by repeated breaking are avoided, the internal stress of a rock stratum is damaged by additionally arranging the rock cracking machine, other work of the whole machine is not affected, and the service life of the heading machine is not affected.

Disclosed are a shearer having an adaptive variable cutting line distance and a cutting method for the shearer. The shearer comprises a box (1), a traveling mechanism (2), a pitch mechanism (3), a longitudinal moving mechanism (5), a cantilever, and cutting mechanisms (7). By means of the traction of a longitudinal moving mechanism, a cantilever of the shearer drives a drum cutting head to perform a longitudinal reciprocating cutting motion, thereby improving the cutting range and efficiency; moreover, by regulating the longitudinal movement speed of the cutting head, the cutting line distance of the shearer can be significantly decreased, the problem of insufficient cutting capacity caused by a small cutting thickness during coal rock cutting is solved, and the risk of failure and damage of mechanisms is reduced; by means of the arrangement of sensors, coal rock can be classified into normal-hardness coal rock, high-hardness coal rock, and ultra-high-hardness coal rock on the basis of load conditions; and when the hardness is relatively high, the cutting thickness and the cutting line distance can be decreased so as to improve the cutting capacity, and when the hardness is relatively low, the cutting thickness and the cutting line distance can be appropriately increased so as to increase the cutting speed, so that the shearer can adapt to relatively complex working conditions, thereby achieving high-quality and high-efficiency cutting.

The digging and anchoring integrated equipment comprises a machine body, an anchoring device and a temporary supporting device, the anchoring device comprises a working table and a first anchoring and protecting assembly, the working table is arranged on the machine body and can move relative to the machine body in the length direction of the machine body, and the first anchoring and protecting assembly is rotationally connected to the working table in the length direction of the machine body; the temporary supporting device comprises a supporting frame and a sliding top plate, the supporting frame is rotationally connected with the machine body, and a first driver is arranged between the supporting frame and the machine body and used for driving the supporting frame to rotate around the width direction of the machine body relative to the machine body; the sliding top plate is slidably connected with the supporting frame, a second driver is arranged between the supporting frame and the sliding top plate, and the second driver is used for driving the sliding top plate to move towards the roadway head-on direction relative to the supporting frame so as to form advanced temporary supporting. According to the invention, zero empty roof can be realized, integrated and automatic operation of roadway tunneling and anchoring operation is completed, and the construction efficiency and quality are greatly improved.

The invention relates to the technical field of gold mine mining, in particular to a gold mine mining rope saw cutting machine combined type guide wheel structure which mainly comprises a first fixing column, an anti-disengaging mechanism and a locking mechanism, a guide wheel is rotationally installed at one end of the first fixing column through a bearing, a first sleeve is installed on the outer wall of the first fixing column, and the anti-disengaging mechanism is arranged on the outer side of the guide wheel. And the locking mechanism is arranged on one side of the guide wheel. A pull rod is pulled to drive a moving plate and an L-shaped strip to move and extrude a first elastic part, the L-shaped strip moves out of a limiting groove, two supporting plates and an anti-shelling shell are adjusted to move to proper positions, the pull rod is loosened, the first elastic part pushes the moving plate and the L-shaped strip to move, the L-shaped strip moves to the limiting groove for limiting, and the L-shaped strip, the supporting plates and the anti-shelling shell are fixed in a limiting mode. The rope on the guide wheel is limited and prevented from falling off through the anti-falling shell, the rope cannot be separated from the guide wheel, the walking path of the rope is not prone to deviation, and then the cutting accuracy and efficiency are improved.

The invention relates to an intelligent control method, system, equipment and medium for automatic discharging mining tunneling cutting picks, and the method comprises the following steps: monitoring the flowing state of coal rock slag in a spiral discharging channel in real time, collecting a channel pressure difference signal and a cutting pick vibration signal, and generating discharging state characteristic parameters; blocking risk quantification is carried out on the characteristic parameters, and a real-time blocking index is generated through weighted fusion calculation; based on the index, a cutting head rotating speed optimization adjustment amount is generated through a fuzzy reasoning mechanism; and finally, generating a rotating speed control instruction through dynamic amplitude limiting processing and sending the rotating speed control instruction to a variable-frequency driving system. By means of the method, real-time sensing and dynamic self-adaptive adjustment of the blockage risk of the discharging channel are achieved, the problem that the discharging channel is blocked due to coal rock property changes is effectively solved, the discharging efficiency and the stability of tunneling operation are improved, and the service life of cutting teeth is prolonged.

The utility model relates to the technical field of coal mining machine accessories, in particular to a self-adaptive cutting coal mining machine roller which comprises a roller body and a cutting tooth assembly frame fixedly installed on the roller body, a plurality of cutting teeth are fixedly installed on the cutting tooth assembly frame, a center main shaft is fixedly installed at the center position of the roller body, and a plurality of cutting teeth are fixedly installed on the center main shaft. End rods are fixedly installed at the two ends of the center main shaft, a fixing sleeve is fixedly installed on one end rod, a first sensor is arranged on the fixing sleeve, an outer rotating sleeve is rotationally connected to the other end rod, a second sensor is arranged on the outer rotating sleeve, a connecting rod is fixedly installed at the bottom of the outer rotating sleeve, and a balancing weight is fixedly installed at the bottom end of the connecting rod. According to the utility model, the orientation of the first sensor is the same as that of the roller main body, the second sensor always keeps horizontal for detection, and the use is convenient.

The invention relates to three-machine combined mining equipment and process, the equipment comprises a conveyor, and a main mining coal mining machine, a left notched coal mining machine and a right notched coal mining machine which take the conveyor as a moving track, and the left notched coal mining machine and the right notched coal mining machine are respectively arranged at the left end part and the right end part of the conveyor; the main mining coal mining machine is arranged between the two notching coal mining machines, the main mining coal mining machine is a double-rocker-arm coal mining machine, the left notching coal mining machine and the right notching coal mining machine are single-rocker-arm coal mining machines only provided with left rocker arms and single-rocker-arm coal mining machines only provided with right rocker arms respectively, and rocker arms of the notching coal mining machines are sliding rocker arms; during mining, the two notching coal mining machines are respectively responsible for cutting left and right end notches in advance, the main mining coal mining machine reciprocates between the two end notches to efficiently mine the middle coal wall at a high speed, the inclined cutting feed process is completely omitted, the end notch mining and the middle coal wall mining can be simultaneously carried out, and the overall mining efficiency is obviously improved.

The invention discloses a thin-wall coal seam coal mining machine adaptive to left-right inclination of a bottom plate, the thin-wall coal seam coal mining machine comprises a machine body, a first cutting roller, a second cutting roller, a first sliding shoe, a second sliding shoe and an angle adjusting assembly, the first cutting roller and the second cutting roller are arranged on the machine body at an interval along the length direction of the machine body; the first sliding shoe and the second sliding shoe are arranged on the machine body in the length direction of the machine body in a spaced mode. The angle adjusting assembly is arranged on the machine body and connected with the first sliding shoe. According to the coal mining machine, the inclination angle of the machine body in the left-right direction of the bottom plate is adjusted through the angle adjusting assembly to adapt to inclination of the bottom plate in the left-right direction, it can be guaranteed that the two cutting rollers can effectively cover the height of the whole coal seam all the time, loss of the coal seam is reduced, and the coal mining efficiency is improved. The coal mining machine can adapt to different inclination conditions of the bottom plate, the adaptability of the machine to different coal seam conditions is enhanced, and the universality and practicability of the machine are improved.

The invention relates to the technical field of thin coal seam mining equipment, in particular to a thin coal seam mining machine with separated cavities. The thin seam mining machine arranged in the separated cavities comprises a machine body, a cover plate assembly and a lubricating assembly, the machine body comprises a first shell, a transmission shell and a third shell which are sequentially arranged at intervals in the extending direction of the machine body, the first shell is provided with a first cavity, the transmission shell is provided with a transmission cavity, the third shell is provided with a third cavity, and the cover plate assembly comprises a plurality of cover plates. The first shell, the transmission shell and the third shell are each provided with a detachably-connected cover plate, the cover plates are used for opening or sealing the corresponding first cavity, the transmission cavity or the third cavity, the lubricating assembly comprises a plurality of lubricating pumps, the cover plates are provided with liquid passing oil ways, and the output ends of the lubricating pumps communicate with inlets of the liquid passing oil ways of the cover plates. Outlets of the liquid passing oil ways of the cover plates face the directions corresponding to the bottoms of the first cavity, the transmission cavity and the third cavity. According to the thin seam coal mining machine arranged in the divided cavities, the oil way of the coal mining machine can be conveniently cleaned, and the running stability of the coal mining machine is improved.

The invention provides a mechanical arm auxiliary operation anchor rod reversed loader for a single drilling rig and a control method of the mechanical arm auxiliary operation anchor rod reversed loader. The anchor rod reversed loader comprises an anchor rod reversed loader body, and the anchor rod reversed loader body is provided with a walking mechanism, a chassis, a material receiving part, a crushing part and a discharging part; and the automatic anchor protection system is arranged on the anchor rod reversed loader body and used for carrying out anchor rod supporting operation on the roadway roof when the anchor rod reversed loader body enters the anchor protection state. According to the mechanical arm auxiliary operation anchor rod reversed loader for the single drilling rig, the walking mechanism, the crushing part and the automatic anchor protection system are arranged on the anchor rod reversed loader body, the integrated operation of walking, transporting, crushing and anchor protection is achieved, the automatic anchor protection system can implement full-process automation of an anchor rod supporting technology in a roadway, and the working efficiency is improved. Workers do not need to operate beside, so that the workers are prevented from working in an environment with serious dust, the safety of the workers is improved, and the labor intensity of the workers is reduced.

The utility model relates to the technical field of cutting pick holder components, in particular to a cutting pick holder component capable of automatically adjusting height for a coal mining machine, which comprises a cutting pick body, an adjusting device is arranged on one side of the cutting pick body, the adjusting device comprises a mounting cylinder, a sliding chute is arranged in the mounting cylinder, a sliding block is arranged in the sliding chute, and a cutting pick holder is arranged in the sliding block. A supporting spring is arranged on one side of the sliding block, a push plate is arranged at the other end of the supporting spring, and a connecting cylinder is arranged on one side of the push plate. According to the cutting tooth holder assembly capable of automatically adjusting the height for the coal mining machine, the effect of facilitating sliding of the cutting tooth body is achieved through matched use of the mounting cylinder, the sliding groove and the sliding block, the effect of pushing the cutting tooth body to reset is achieved through matched use of the push plate and the supporting spring, and the effect of facilitating rotation of the threaded rod is achieved through matched use of the connecting cylinder and the rotating disc.

The utility model discloses a hard rock cutting pick with a composite wear-resistant layer structure, which comprises a cutter handle, an alloy cutter head and a conical ring sleeve, and an alloy head is arranged at the top end of the alloy cutter head; and an auxiliary blade is arranged on the outer surface of the alloy head. According to the hard rock cutting pick with the composite wear-resistant layer structure, through the arrangement of the auxiliary blade, the sawtooth blade, the small chamfers, the alloy head and the alloy tool bit, when the hard rock cutting pick is used, the auxiliary blade can firstly make contact with a cut object, mechanical energy cutting can be conducted on the object through the auxiliary blade, and the friction force of the alloy head is reduced; when a certain distance is cut, the sawtooth blade can make contact with a cut object, due to the fact that the small chamfer is arranged at one end of the sawtooth blade, cutter feeding can be facilitated, the friction force of the alloy cutter head is greatly reduced, cutting is facilitated to a certain degree, and the service life of the cutting pick can be prolonged.

The invention relates to an onboard mobile operation platform of a coal mining machine and a mounting structure of the onboard mobile operation platform on the coal mining machine, the mobile operation platform comprises a left platform, a right platform, a platform connecting assembly, a left side outer guide strip, a right side outer guide strip, a mobile oil cylinder and a supporting column, the lower portions of the left side and the right side of the supporting column are provided with a left side inner guiding structure and a right side inner guiding structure respectively, the left platform is in front-back sliding fit with the left side outer guiding strip and the left side inner guiding structure, the right platform is in front-back sliding fit with the right side inner guiding structure and the right side outer guiding strip, and the rear end of the left platform and the rear end of the right platform are connected together through a platform connecting assembly. The front end and the rear end of the movable oil cylinder are hinged to the supporting column and the platform connecting assembly respectively. The installation structure comprises the mobile operation platform and a machine top of the coal mining machine, the left and right side outer guide strips and the supporting columns are detachably and fixedly installed on the machine top, and an operation space is formed between the left and right platforms and a top protection plate. An installation foundation and a flexible operation space can be provided for the drilling machine.

The utility model belongs to the technical field of protection devices, and particularly relates to a coal mining heading machine cutting head protection device which comprises a driving arm, the output end of the driving arm is connected with a cutting head, a first installation sleeve frame and a second installation sleeve frame are arranged on the outer side of the driving arm in a sleeved mode, and sliding grooves are formed in the outer side of the first installation sleeve frame and the outer side of the second installation sleeve frame. A sliding block is slidably mounted on the inner side of the sliding groove, one end of the sliding block is fixed to the protective cover, a steering chamber is arranged at the end, located on the sliding groove, of the side face of the second mounting sleeve frame, a transmission screw is rotatably mounted on the inner side of the sliding groove and is in threaded connection with the sliding block, and one end of the transmission screw penetrates into the steering chamber and is rotatably connected with the steering chamber. One end of the transmission screw is fixed to the first bevel gear, a driving mechanism is rotationally installed on the inner side of the steering chamber, when the cutting head conducts tunneling, fragments generated in the tunneling process and splashing towards the rear portion of the cutting head can be effectively blocked, and the production safety is improved.

The embodiment of the invention provides a control method and device for a roller of a coal mining machine, a storage medium and electronic equipment. The control method comprises the steps that the current running direction angle of the roller of the coal mining machine on the current working face is obtained, and the target adjusting angle of a cutting roller is obtained based on adjacent key cutting points; obtaining the height difference between the adjacent cutting key cutting points, determining the height difference threshold value of the cutting roller, and obtaining the cutting target adjustment angle of the cutting roller based on the relation between the height difference between the adjacent cutting key cutting points and the height difference threshold value of the cutting roller and the relation between the current operation direction angle of the roller and the cutting target adjustment angle of the cutting roller. And the height and the traction speed of the cutting roller are adjusted. According to the embodiment of the invention, a plurality of groups of scientific and quantitative height difference threshold value calculation models are established, and the difference value between the motion direction angle of the roller and the target direction angle is combined, so that an accurate and self-adaptive threshold value judgment standard is provided for the heightening, lowering or non-adjusting actions of the roller, and the precision and stability of roller heightening control are improved.

The invention provides an anti-rock-burst return airway advance support method and device, and the method comprises the steps: deploying a mining crawler-type carrier and a plurality of advance supports in an advance region of a return airway, and supporting the advance region of the return airway; a crawler-type unit support and a plurality of hydraulic supports with super-large working resistance are arranged in the air return roadway to support the air return roadway; after the coal mining machine finishes cutting one knife of coal, moving a plurality of forepoling and a plurality of hydraulic supports with super-large working resistance; when the forepoling is moved, the forepoling located at the rearmost end of the forepoling area is moved to the foremost end of the forepoling area in a descending mode through a mining crawler-type carrier in the mode that one forepoling is carried each time, the area where the forepoling is moved is temporarily supported through the crawler-type unit supports, and after the crawler-type unit supports are withdrawn, the forepoling is moved. And the hydraulic support with the super-large working resistance is moved in a stepping mode. According to the supporting method, disturbance of stress of the return airway can be reduced, the phenomenon of sudden stress release is reduced, and the continuous supporting capacity of the return airway is improved.

The invention relates to a slippage type cutting system of a coal mining machine, which comprises a slippage part, a non-slippage part and a slippage oil cylinder, the slippage part and the non-slippage part are in sliding connection left and right through the matching of a guide chute and a guide slide rail, and the two ends of the slippage oil cylinder are respectively hinged on the slippage part and the non-slippage part; an upper row of supporting oil cylinders and a lower row of supporting oil cylinders are further arranged at the outer end of the non-sliding part, each row of supporting oil cylinders are arranged at intervals in the front-back direction, and when the sliding part moves to the front position or the rear position relative to the non-sliding part, piston rods of the upper row of supporting oil cylinders and the lower row of supporting oil cylinders located on the front portion or the rear portion extend to the sliding part and abut against the guide sliding rails. The piston rod retracts to break away from the sliding part. When the device is applied to the mining and drilling all-in-one machine, the conveyor can be normally pushed in each coal mining stroke, a passing space does not need to be reserved for a roller which stops in the drilling operation, the gas drilling drainage operation of a working face is greatly facilitated, and the mining efficiency of the mining and drilling all-in-one machine is improved.

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 utility model relates to a coal mining machine drum with a double-drum box-type frame structure, which comprises a drum body with a double-layer structure, the drum body comprises an outer drum ring, an inner drum ring and a tail reinforcing ring, the outer drum ring and the inner drum ring are coaxially arranged and are spaced from each other in the radial direction, an inner hole of the inner drum ring is a taper hole with a small front part and a large rear part, and the tail reinforcing ring is arranged at the tail part of the drum body. The roller body comprises an outer roller ring and an inner roller ring, the rear ends of the outer roller ring and the inner roller ring are fixedly connected through the tail reinforcing ring, the roller body further comprises a plurality of reinforcing partition plates, the reinforcing partition plates are distributed in a central radial mode with the axis of the roller body as the axis, and an annular space defined by the outer roller ring, the inner roller ring and the tail reinforcing ring is divided into a plurality of fan-shaped box bodies. According to the utility model, the abrasion of the planetary mechanism and the gravity center deviation of the spiral drum caused by the accumulation of coal dust between the planetary mechanism and the drum body can be effectively prevented, so that the service lives of the drum and the coal mining machine can be prolonged.

The invention provides a mechanical arm auxiliary operation digging and anchoring all-in-one machine for multi-drilling-rig synchronization and a control method.The digging and anchoring all-in-one machine comprises a cutting part, a loading part, a temporary supporting part, two drilling machine units, two mechanical arm systems, a rack and a conveying part, and the two drilling machine units are arranged on the left side and the right side of the rack; the drilling machine unit comprises a first top anchor drilling machine, a second top anchor drilling machine and a lateral wall drilling machine, and the lateral wall drilling machine is located behind the first top anchor drilling machine and the second top anchor drilling machine; the two mechanical arm systems are arranged on the left side and the right side of the rack and used for providing anchor protection materials for the first top anchor drilling machine and the second top anchor drilling machine and cooperatively completing anchor protection operation. According to the digging and anchoring all-in-one machine, full-process automation of anchor rod supporting operation can be achieved, workers do not need to operate beside, the workers are prevented from working in the environment with serious dust, the safety of the workers is improved, and the labor intensity of the workers is relieved.

A cutting assembly is provided for a rock excavation machine having a frame. The cutting assembly includes a base portion configured to be supported by the frame, a flexible shaft, and a cutting device. The base portion defines a base axis. The flexible shaft includes a first end and a second end opposite the first end. The first end is coupled to the base portion, and the second end is movable relative to the first end and deflectable away from the base axis. The cutting device is supported on the second end of the flexible shaft.

The present application relates to a kind of pick assembly with wear sensing device, drum and coal winning machine, including pick collar, pick, fiber sensor and data acquisition equipment, pick is fixedly connected with pick collar by snap ring;Pick includes tooth head and pick matrix, tooth head is installed in the end surface recess of pick matrix, installation hole is opened along the central axis of pick matrix and tooth head, installation hole penetrates pick matrix and extends into tooth head;Fiber sensor is implanted in installation hole, tail end of fiber sensor is fixedly encapsulated with pick collar;Data acquisition equipment is communicatively connected with tail end of fiber sensor, and real-time sends the wear signal collected to monitoring terminal.Pick head and pick matrix can be effectively measured wear curve in time, realize the real-time tracking of pick wear state continuous change, assess the wear performance of pick and predict the abnormal damage of pick.

The invention belongs to the technical field of mining equipment, and discloses a power crushing system of a thin seam mining machine, which comprises a duplex gear pump driven by a motor and comprising a first gear pump and a second gear pump, an oil tank is connected to the first gear pump and the second gear pump, an oil outlet of the first gear pump is connected to a hydraulic unit and a crushing device driving unit, and an oil outlet of the second gear pump is connected to a hydraulic unit; an oil outlet of the second gear pump is connected into the power crushing loop; the power crushing loop comprises a crushing electromagnetic valve, a crushing main control valve and a power crushing device which are connected in sequence, the power crushing device is mounted on a rocker arm of the coal mining machine in the reverse coal flow direction, and the second gear pump is connected with the crushing electromagnetic valve; the crushing device driving unit comprises an electromagnetic reversing valve, a manual-hydraulic reversing valve, a one-way throttle valve, a hydraulic lock and a crushing device oil cylinder which are connected in sequence, and the crushing device oil cylinder is used for driving the power crushing device to swing up and down. Through the innovative design of the hydraulic system of the coal mining machine, the crushing capacity of the crushing device can be effectively improved.

The utility model relates to the field of coal mining machines, and discloses a coal mining machine drum convenient to clean, which comprises a motor shaft, a traction ring is fixedly mounted at the left end of the motor shaft, a crushing ring I is fixedly mounted on the left side of the traction ring, and an inner drum body is fixedly mounted in the middle of the left side of the crushing ring I; a second lead screw is installed on the left side of the inner cylinder in a meshed mode, a second crushing ring is installed in the middle of the second lead screw in a meshed mode, and a first lead screw is installed in the second crushing ring in a meshed mode. By arranging the second crushing ring, rotating the second lead screw and the first lead screw, the second lead screw and the first lead screw are separated from the interiors of the inner cylinder body and the outer cylinder body respectively, so that fixation of the second crushing ring is relieved, the right side of the outer cylinder body is inserted into the first crushing ring, the second crushing ring is removed, and the outer cylinder body is pulled out from the interior of the first crushing ring, so that fixation of the second crushing ring is relieved. Therefore, the spiral blade and the scraper conveying end disc on the surface of the outer barrel are separated, the part, needing to be cleaned, of the roller can be separated and detached, and operation is easy and convenient.

The utility model relates to the technical field of mine mechanical equipment, and provides a novel mine sawing machine which comprises a machine body, a saw blade and a control system which are arranged on the machine body and further comprises at least one group of protection alarm units, and each group of protection alarm units comprises a first fixing column, a second fixing column, a protection wire, a sensor and an alarm. The first fixing column and the second fixing column are arranged on the same side, where the saw blade is installed, of the machine body and located on the left portion and the right portion of the machine body respectively, the two ends of the protection line are arranged on the first fixing column and the second fixing column respectively, and at least one end of the protection line is detachably connected with the first fixing column or the second fixing column. The middle of the protection line stretches across the outer side of the saw blade, the sensor is arranged at one end of the protection line to detect whether the protection line shakes or not in real time and send detection information to the control system of the machine body, and the alarm is connected with the output end of the control system to give an alarm about shaking of the protection line. The mine sawing machine solves the problem that a saw blade is inconvenient to maintain and replace due to the fact that an existing mine sawing machine is provided with a protective cover.

The invention provides a mechanical arm auxiliary operation anchor rod drill carriage and a control method.The anchor rod drill carriage comprises a supporting unit, a sliding rail unit, a drilling machine unit, a mechanical arm system and a rack, the mechanical arm system comprises at least one mechanical arm and a material storage unit, and the material storage unit is used for storing anchor protection materials; the mechanical arms are used for providing anchor protection materials for the top anchor drilling machines and cooperatively completing anchor protection operation, and the number ratio of the top anchor drilling machines to the mechanical arms is not smaller than 2. According to the mechanical arm auxiliary operation anchor rod drill carriage for multi-drill-stand synchronization, the drilling machine unit and the mechanical arm unit are arranged, the drilling machine unit and the mechanical arm unit cooperate to complete full-process automatic operation of anchor protection supporting, workers do not need to operate beside, the workers are prevented from working in the environment with serious dust, and the working efficiency is improved. The safety of operators is improved, and the labor intensity of the operators is reduced.