Efficient and safe crusher for mine exploitation
Technical Field
The invention relates to the technical field of ore crushing, in particular to a high-efficiency and safe crusher for mine exploitation.
Background
Coal mines are areas where coal resources are mined by mankind in mining areas rich in coal and are generally divided into underground coal mines and open pit coal mines, the coal mines are reasonable spaces where mankind excavates when mining geological layers rich in coal, generally comprise roadways, shaft pits, mining faces and the like, in the process of coal mining, the coal blocks are large in size and unfavorable for transportation and later reprocessing, so that a crushing device is frequently used for coal mining to crush the coal mines, but the conventional crusher cannot quickly adjust the crushing size grade of coal ores according to requirements in the use process, the conventional crusher is extremely inconvenient, coal stones are fragile, the smaller coal stones are easy to be beaten into smaller coal ores in the process of conveying to the crusher, quality is affected, a large amount of dust is easy to generate in the crushing process, in the roadways, if the dust is too large, the conventional crusher dust removing device has a dust removing effect, but the effect is poor and needs to be manually and periodically processed, and is very inconvenient.
Disclosure of Invention
Aiming at the situation, the invention aims to overcome the defects of the prior art, and aims to provide the efficient and safe crusher for the mine, which effectively solves the problems that the crushing size grade is inconvenient to adjust and the dust removing equipment needs to be cleaned manually at regular intervals.
The technical scheme includes that the device comprises a crushing bin, wherein a receiving frame is fixedly connected to the upper side of the crushing bin, a plurality of sieve rods uniformly distributed along the front and rear directions of the receiving frame are arranged in the receiving frame, distance control assemblies are respectively arranged on the left side and the right side of the receiving frame, the distance control assemblies can drive the sieve rods to move and rapidly regulate the distance between the sieve rods at equal intervals, a rotating shaft is fixedly connected to the inner side of the crushing bin, an eccentric roller is fixedly connected to the outer end of the rotating shaft, a baffle is fixedly connected to the left side of the crushing bin, an arc-shaped impact plate is hinged to the lower side of the baffle, arc-shaped grooves are respectively formed in the front side and the rear side of the crushing bin, two supporting rods which are opposite to each other in front and rear directions and are respectively positioned in the arc-shaped grooves on the corresponding sides of the impact plate are fixedly connected to the right end of the impact plate, an adjusting assembly is arranged at the front end of the crushing bin, the adjusting assembly can drive the impact plate to swing and provide power for the distance adjustment of the sieve rods, an electromagnetic grid is fixedly connected to the left side of the crushing bin, a filter screen is fixedly connected to the dust removing bin is arranged in the dust removing bin, a filter screen is fixedly connected to the upper the electromagnetic grid, a cleaning assembly is arranged in the dust removing assembly, and a cleaning assembly is arranged in the dust removing bin.
The distance control assembly comprises a rotating rod, a plurality of diffusion grooves corresponding to the sieve rods one by one are formed in the rotating rod, sliding pins inserted into the diffusion grooves on the corresponding sides of the sieve rods are fixedly connected to the left side and the right side of the sieve rods respectively, the front end of the rotating rod is fixedly connected with a belt wheel I, two belt wheels are connected through a belt I in a transmission mode, inclined plates are fixedly connected to the sieve rods at the foremost end and the rearmost end respectively, and the two inclined plates are symmetrical front and back.
The adjusting component comprises a moving block, two rotatable turntables are respectively arranged on the left side and the right side of the moving block, a deflector rod is fixedly connected to the rear end of the turntables, connecting rods are respectively hinged to the front side and the rear side of the turntables, limiting blocks are fixedly connected to the other ends of the connecting rods, limiting ratchet bars are respectively arranged on the upper side and the lower side of the moving block, the limiting ratchet bars are divided into opposite ratchets, the left limiting blocks are matched with the upper sides of the limiting ratchet bars, the right limiting blocks are matched with the lower sides of the limiting racks, the right ends of the moving rods are fixedly connected with push-pull rods, connecting frames are fixedly connected to the right ends of the push-pull rods, kidney grooves are formed in the middle parts of the connecting frames, and struts on the front sides are located in the kidney grooves.
The middle part of the movable block is provided with a driving block capable of moving left and right, the driving block is in a parallelogram shape, inclined surfaces of the driving block on two sides can be in contact with a deflector rod on the corresponding side of the driving block, the front end of the crushing bin is fixedly connected with a hydraulic rod, and the output end of the hydraulic rod is fixedly connected with the left end of the movable block.
The front side and the rear side of the moving block are respectively and fixedly connected with a plurality of groups of balance bars, the limiting block is in sliding connection with a group of balance bars on the corresponding side of the limiting block, and one balance bar in the group is provided with a reset spring positioned between the limiting block and the moving block.
The right side one front end of the belt wheel is fixedly connected with a connecting rod, the lower side of the connecting rod is provided with a movable groove, and the front end of the moving block is fixedly connected with a movable pin positioned in the movable groove.
The right end of the dust collection bin is communicated with the crushing bin through a dust collection pipe, the right end of the dust collection pipe is fixedly connected with a protective net, the upper end of the dust collection bin is fixedly connected with an air outlet pipe, the lower side of the dust collection bin is slidingly connected with a dust storage box, and the lower side of the dust collection bin is fixedly connected with a dust collection hopper positioned between the electromagnetic grid and the dust storage box.
The cleaning assembly comprises a driving motor, the output end of the driving motor is fixedly connected with a reciprocating screw, the reciprocating screw is rotationally connected with a dust removal bin, the outer wall of the reciprocating screw is in threaded connection with a cleaning rod, the cleaning rod is fixedly connected with a cleaning brush matched with an electromagnetic grid, the front end of the reciprocating screw is hinged with a rocker, the front side wall of the dust removal bin is slidably connected with a lifting rod, the lower end of the lifting rod is hinged with the upper end of the rocker, the upper end of the lifting rod is fixedly connected with a waist-shaped frame, the front side wall of the dust removal bin is rotationally connected with a rotating rod, the left end of the rotating rod is fixedly connected with a vibrating hammer, and the right end of the rotating rod is eccentrically fixedly connected with a connecting pin positioned in the waist-shaped frame.
The crushing bin upper end fixedly connected with goes down the feed bin, is equipped with the feeding conveyer belt in the feed bin down, lower feed bin upside fixedly connected with splashproof net, and crushing bin downside is equipped with the ejection of compact conveyer belt, and feeding conveyer belt rear end and ejection of compact conveyer belt rear end equal fixedly connected with band pulley two, axis of rotation rear end fixedly connected with spur gear, crushing bin rear end fixedly connected with band pulley three, band pulley three rear end fixedly connected with and spur gear engaged spur gear, two band pulleys two pass through belt two transmission connection with band pulley three.
According to the invention, the gap of the sieve rod can be uniformly adjusted by the aid of the bearing frame, the sieve rod and the distance control assembly, so that correspondingly smaller coal stones can be directly leaked into the crushing bin according to crushing requirements, secondary crushing is not required by the aid of the eccentric roller and the impact plate, the fact that the smaller coal stones are crushed into smaller coal blocks to affect transportation and production quality is avoided, and the rotating shaft, the eccentric roller, the impact plate, the arc-shaped groove, the supporting rod and the adjusting assembly can be used for adjusting the distance between the impact plate and the eccentric roller by the aid of the adjusting assembly, so that the size of crushed coal ores can be controlled according to requirements, manual or shutdown operation is not required, time waste is reduced, and interruption of production rhythm is avoided.
According to the invention, dust caused by crushing in the crushing bin can be sucked by the dust removing bin, the electromagnetic grid and the filter screen are arranged, when the air with the dust enters the dust removing bin, the electromagnetic grid adsorbs the dust in the air, the air is purified, then the filter screen is utilized to carry out secondary purification, the residual dust is prevented from being discharged into the air by the air outlet pipe, after dust is sucked for a certain period of time, the electromagnetic grid is closed to enable the dust to be powered off, and then the cleaning assembly is started to clean the dust on the electromagnetic grid and the dust on the filter screen, so that normal use can be ensured.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a schematic front view, partially cut-away, of the present invention.
Fig. 3 is a schematic bottom view of the straight rod of the present invention.
Fig. 4 is a schematic front view, partially in section, of a hydraulic stem of the present invention.
Fig. 5 is a right side view of the reciprocating screw of the present invention.
Fig. 6 is a rear isometric view of the present invention.
Fig. 7 is a schematic front view of a stopper in the present invention.
Fig. 8 is a schematic front view of a screen bar of the present invention.
Fig. 9 is a schematic front view of the inclined plate of the present invention.
Fig. 10 is an enlarged view of a of fig. 3 according to the present invention.
Fig. 11 is an enlarged view of B of fig. 5 according to the present invention.
In the figure, 1, a crushing bin, 2, a bearing frame, 3, a sieve rod, 4, a distance control component, 5, a rotating shaft, 6, an eccentric roller, 7, a baffle, 8, an impact plate, 9, an arc groove, 10, a supporting rod, 11, an adjusting component, 12, a dust removing bin, 13, an electromagnetic grid, 14, a filter screen, 15, a cleaning component, 16, a rotating rod, 17, a diffusion groove, 18, a sliding pin, 19, a belt pulley, 20, a belt, 21, an inclined plate, 22, a moving block, 23, a turntable, 24, a deflector rod, 25, a connecting rod, 26, a limiting block, 27, a limiting ratchet rod, 28, a push-pull rod, 29, a connecting frame, 30, a waist groove, 31, a driving block, 32, a hydraulic rod, a balance rod, 34, a reset spring, 35, a connecting rod, 36, a movable groove, 37, a movable pin, 38, a dust suction pipe, 39, a net, 40, 41, a dust storage box, 42, a bucket, 43, a driving motor, 44, a reciprocating screw, 45, a cleaning rod, 46, a cleaning brush, 47, a rocker, a lifting and a rocker, 48, a push-pull rod, 48, a lifting and a lifting belt, a push-pull rod, 50, a dust collecting box, a feed hopper, and a feed carrier, and a material conveying frame.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
The utility model provides a by fig. 1 through 11, including broken storehouse 1, broken storehouse 1 upside fixedly connected with accepts frame 2, accept frame 2 in be equipped with a plurality of sieve bars 3 of equipartition along its fore-and-aft direction, accept frame 2 left and right sides and be equipped with respectively apart from subassembly 4, apart from subassembly 4 can drive sieve bars 3 removal and the interval of quick equidistance regulation sieve bars 3, the internal rotation of broken storehouse 1 is connected with axis of rotation 5, axis of rotation 5 outer end fixedly connected with eccentric roller 6, broken storehouse 1 left side fixedly connected with baffle 7, baffle 7 downside articulates there is curved striking board 8, arc wall 9 has been seted up respectively to broken storehouse 1 front and back both sides, striking board 8 right-hand member fixedly connected with two front and back are relative and be located the branch 10 in the arc wall 9 of its corresponding side respectively, broken storehouse 1 front end is equipped with adjusting part 11, adjusting part 11 can drive striking board 8 swing and provide power for sieve bar 3 adjustment interval, be equipped with electromagnetism grid 13 in the broken storehouse 1 left side fixedly connected with 12, electromagnetism grid 13 top fixedly connected with 14 in the electromagnetism grid 13, be equipped with filter screen 15 in the dust removal storehouse 12, be equipped with subassembly 15 in the clearance grid 13 can be used for cleaning dust on the filter screen 13.
The setting of the bearing frame 2, the screen rod 3 and the distance control component 4 can uniformly adjust the gap of the screen rod 3 by utilizing the distance control component 4, so that the coal mine stones which are relatively smaller according to the crushing requirement can be directly leaked into the crushing bin 1 without secondary crushing by utilizing the eccentric roller 6 and the impact plate 8, the coal mine stones which are relatively smaller are prevented from being crushed into smaller coal blocks, the transportation and the production quality are prevented from being influenced, the distance between the rotating shaft 5, the eccentric roller 6, the impact plate 8, the arc-shaped groove 9, the supporting rod 10 and the adjusting component 11 can be adjusted by utilizing the adjusting component 11, the size of the crushed coal ores can be controlled according to the requirement, the manual or shutdown operation is not needed, the time waste is reduced, the interruption of the production rhythm is avoided, setting up dust bin 12, electromagnetism grid 13 and filter screen 14 can utilize dust bin 12 to absorb the dust that causes because of the breakage in the broken storehouse 1, when the air of taking the dust gets into in the dust bin 12, electromagnetism grid 13 adsorbs the dust in the air, purify the air, then utilize filter screen 14 to carry out secondary purification, avoid remaining dust to be discharged into the air by outlet duct 40, after the dust absorption certain time, close electromagnetism grid 13, make it outage, start cleaning assembly 15 later and clear up the dust on electromagnetism grid 13 and the dust on the filter screen 14, ensure can normal use, broken storehouse front end articulates there is the access door, the access door is convenient for carry out maintenance work such as welt change to inside eccentric roller, the axis of rotation 5 external has rotating electrical machines, can drive its rotation.
The distance control assembly 4 comprises a rotating rod 16, a plurality of diffusion grooves 17 which are in one-to-one correspondence with the sieve rods 3 are formed in the rotating rod 16, sliding pins 18 which are inserted into the diffusion grooves 17 on the corresponding sides are fixedly connected to the left side and the right side of the sieve rods 3 respectively, belt wheels I19 are fixedly connected to the front ends of the rotating rod 16, the two belt wheels I19 are in transmission connection through a belt I20, inclined plates 21 are fixedly connected to the sieve rods 3 on the foremost end and the rearmost end respectively, and the two inclined plates 21 are in front-to-back symmetry.
As shown in the figure, the rotating rod 16, the diffusion groove 17, the sliding pin 18, the belt wheel 19, the belt 20 and the inclined plate 21 are arranged, the sieve rod 3 is driven to perform equidistant gap adjustment through the action of the diffusion groove 17 and the sliding pin 18, coal stones with different sizes are screened out in advance according to different crushing grades, coal stones with different sizes are prevented from entering a crushing area to cause the crushing pressure to become large, the coal stones are easily crushed into smaller coal blocks, the gradient of the diffusion groove 17 from the middle to the front side and the rear side is increased in sequence to ensure that the gap change of the sieve rod 3 is identical, the belt wheel 19, the rotating rod 16 and the belt 20 can simultaneously rotate by utilizing the two rotating rods 16, the sieve rod 3 can be further ensured to be driven to move and not to skew, the inclined plate 21 can ensure that the coal ores are concentrated to the middle, and front and rear holes generated by the adjusting gap of the sieve rod 3 are prevented from falling.
The adjusting component 11 comprises a moving block 22, two rotatable turntables 23 are respectively arranged on the left side and the right side of the moving block 22, a deflector rod 24 is fixedly connected to the rear end of each turntable 23, a connecting rod 25 is respectively hinged to the front side and the rear side of each turntable 23, a limiting block 26 is fixedly connected to the other end of each connecting rod 25, limiting ratchet strips 27 are respectively arranged on the upper side and the lower side of the moving block 22, each limiting ratchet strip 27 is divided into opposite ratchets, the limiting block 26 on the left side is matched with the upper side of each limiting ratchet strip 27, the limiting block 26 on the right side is matched with the lower side of each limiting rack, a push-pull rod 28 is fixedly connected to the right end of each push-pull rod 28, a connecting frame 29 is fixedly connected to the right end of each push-pull rod, a waist-shaped groove 30 is formed in the middle of each connecting frame 29, and a strut 10 on the front side is located in each waist-shaped groove 30.
If the figure sets up movable block 22, carousel 23, driving lever 24, connecting rod 25, stopper 26, spacing thorn 27, push-and-pull rod 28, link up frame 29 and kidney slot 30 can utilize the cooperation of stopper 26 and spacing thorn 27 to fix the position of branch 10, and then fix the position of striking board 8, this moment because stopper 26 and spacing thorn 27 will all lock about the direction, can avoid branch 10 to swing at will, lead to the fixed unstable problem of striking board 8, can remove two of them stopper 26 and spacing thorn 27's spacing through driving lever 24 rotation carousel 23, after the stopper 26 of left side is removed, movable block 22 can left-hand movement, the movable block 22 can right-hand movement after the removal of right side, and then reach the purpose of being convenient for control and regulation striking board 8 position.
The middle part of the moving block 22 is provided with a driving block 31 which can move left and right, the driving block 31 is in a parallelogram shape, inclined surfaces of the driving block 31 on two sides can be contacted with the deflector rods 24 on the corresponding sides, the front end of the crushing bin 1 is fixedly connected with a hydraulic rod 32, and the output end of the hydraulic rod 32 is fixedly connected with the left end of the moving block 22.
As shown in the figure, the driving block 31 and the hydraulic rod 32 are arranged, the driving block 31 can be driven to move left and right by the hydraulic rod 32, and then the inclined surface of the driving block 31 can be contacted with the deflector rod 24, so that the purpose of driving the turntable 23 to rotate by the deflector rod 24 can be achieved, namely, the turntable 23 can be rotated, namely, the limit of the limit block 26 at one side is retracted, and the moving block 22 can be driven to move unidirectionally, and the position of the impact plate 8 is regulated.
The front side and the rear side of the moving block 22 are respectively and fixedly connected with a plurality of groups of balance rods 33, the limiting block 26 is in sliding connection with a group of balance rods 33 on the corresponding side, and one balance rod 33 in one group is provided with a reset spring 34 positioned between the limiting block 26 and the moving block 22.
As shown in the figure, the balance rod 33 can ensure the movement track of the limiting block 26, avoid the problem that the limiting block 26 cannot be meshed with the limiting ratchet 27 due to the skew of the moving track, support the limiting block 26 at the same time, and the reset spring 34 can ensure that the limiting block 26 can be meshed with the limiting ratchet 27 at the first time after the adjustment is completed, so as to ensure the fixing of the position of the moving block 22.
The front end of the first belt wheel 19 on the right side is fixedly connected with a connecting rod 35, the lower side of the connecting rod 35 is provided with a movable groove 36, and the front end of the movable block 22 is fixedly connected with a movable pin 37 positioned in the movable groove 36.
As shown in the figure, when the position of the impact plate 8 can be adjusted by arranging the connecting rod 35, the movable groove 36 and the movable pin 37 through the movement of the moving block 22, the distance between the sieve rods 3 on the receiving frame 2 can be adjusted through the connecting rod 35, the adjustment of the crushing grade of coal mine stones according to the requirements is ensured, when the impact plate 8 is far away, the size after crushing is large, meanwhile, the distance between the sieve rods 3 is large, the coal ores at the crushing grade are screened out in advance, the crushing pressure is reduced, and secondary crushing is avoided.
The right end of the dust collection bin 12 is communicated with the crushing bin 1 through a dust collection pipe 38, the right end of the dust collection pipe 38 is fixedly connected with a protective net 39, the upper end of the dust collection bin 12 is fixedly connected with an air outlet pipe 40, the lower side of the dust collection bin 12 is slidingly connected with a dust storage box 41, and the lower side of the dust collection bin 12 is fixedly connected with a dust collection hopper 42 positioned between the electromagnetic grid 13 and the dust storage box 41.
As shown in the figure, the dust collection pipe 38 is convenient for dust collection, the protection net 39 is arranged to prevent coal mine stones from splashing to damage the inside of the dust collection pipe 38 when broken, the air outlet pipe 40 is used for communicating air extraction equipment, filtered air is discharged simultaneously, the dust storage box 41 is arranged to facilitate centralized treatment of cleaned dust, and cleaning and operation time are reduced.
The cleaning assembly 15 comprises a driving motor 43, the output end of the driving motor 43 is fixedly connected with a reciprocating screw rod 44, the reciprocating screw rod 44 is rotationally connected with the dust removal bin 12, a cleaning rod 45 is connected to the outer wall of the reciprocating screw rod 44 in a threaded manner, a cleaning brush 46 matched with the electromagnetic grid 13 is fixedly connected to the cleaning rod 45, a rocker 47 is hinged to the front end of the reciprocating screw rod 44, a lifting rod 48 is slidably connected to the front side wall of the dust removal bin 12, the lower end of the lifting rod 48 is hinged to the upper end of the rocker 47, the upper end of the lifting rod 48 is fixedly connected with a waist-shaped frame 49, the front side wall of the dust removal bin 12 is rotationally connected with a rotary rod 16, the left end of the rotary rod 16 is fixedly connected with a vibrating hammer 51, and the right end of the rotary rod 16 is eccentrically fixedly connected with a connecting pin 52 positioned in the waist-shaped frame 49.
As shown in the figure, the reciprocating screw 44, the cleaning rod 45 and the cleaning brush 46 are arranged, the reciprocating screw 44 can be used for driving the cleaning rod 45 to move forwards and backwards, the cleaning brush 46 is used for cleaning dust adsorbed on the electromagnetic grid 13 after power failure, the follow-up use is convenient, the rocking rod 47, the lifting rod 48, the waist-shaped frame 49, the rotating rod 16, the oscillating weight 51 and the connecting pin 52 are arranged, the lifting rod 48 can be driven to lift by the rocking rod 47 through the rotation of the reciprocating screw 44, the rotating rod 16 can be driven to swing reciprocally through the waist-shaped frame 49 and the connecting pin 52, the rotating rod 16 can be used for driving the oscillating weight 51 to continuously strike dust on the upper side of the filter screen 14 and fall into the storage box after being concentrated through the dust hopper 42, the electromagnetic grid 13 can be used for dust collection or dust collection removal effect through power on and power failure, and control is convenient.
The crushing storehouse 1 upper end fixedly connected with lower feed bin 53 is equipped with feeding conveyer belt 54 in the lower feed bin 53, and lower feed bin 53 upside fixedly connected with splashproof net 55, crushing storehouse 1 downside are equipped with ejection of compact conveyer belt 56, and feeding conveyer belt rear end and ejection of compact conveyer belt 56 rear end all fixedly connected with band pulley two, axis of rotation 5 rear end fixedly connected with spur gear, crushing storehouse 1 rear end fixedly connected with band pulley three, band pulley three rear end fixedly connected with spur gear engagement's spur gear, two band pulleys two pass through belt two transmission connection with band pulley three.
As shown in the figure, setting up down feed bin 53 and being convenient for concentrate to throw the material in the broken storehouse 1, setting up the coal ore that the feeding conveyer belt 54 was convenient for carry just to, setting up splash screen 55 and causing the ore to lead to flying out broken storehouse 1 to cause personal safety problem to staff around when avoiding broken material through the striking, setting up ejection of compact conveyer belt 56, spur gear, band pulley two, band pulley three and belt two can utilize the rotation of axis of rotation 5 to drive ejection of compact conveyer belt 56 and feeding conveyer belt 54 synchronous rotation simultaneously, spur gear and spur gear's setting can change the axis of rotation and the drive direction of feeding conveyer belt 54 and ejection of compact conveyer belt 56 inconsistent, ensure that the conveyer belt direction of delivery is correct.
When the coal ore crushing machine is used, coal ore is thrown into the interior through the discharging bin 53, coal ore falls onto the feeding conveying belt 54, then is conveyed to the receiving frame 2 by the feeding conveying belt 54, smaller coal ore falls onto the discharging conveying belt 56 from a gap between the sieve bars 3 without crushing, larger coal ore falls between the eccentric roller 6 and the impact plate 8, and then is crushed by synchronous extrusion of the eccentric roller 6 and the impact plate 8, and the crushed coal ore falls onto the discharging conveying belt 56 to be uniformly conveyed out of the crushing bin 1;
When the crushing grade is required to be changed according to the requirement, the hydraulic rod 32 is started, if smaller coal stones are required, the hydraulic rod 32 drives the driving block 31 to move leftwards, the inclined surface of the driving block 31 is in contact with the left deflector rod 24, then the driving block 31 drives the rotary table 23 to rotate through the deflector rod 24, the rotary table 23 pulls the left two limiting blocks 26 to move relatively through the connecting rod 25, the left two limiting blocks 26 are separated from the limiting ratchet 27, the hydraulic rod 32 can pull the moving block 22 to move leftwards, the moving block 22 drives the supporting rod 10 to move leftwards through the push-pull rod 28, the hydraulic rod 32 stops after moving to a proper position and moves rightwards for a certain distance, the two limiting blocks 26 can move oppositely under the action of the reset spring 34 and mesh with the limiting ratchet 27 again, so that the position of the moving block 22 can be completely fixed, and the position adjustment and fixation of the impact plate 8 can be realized, and when larger coal stones are required, the hydraulic rod 32 drives the driving block 31 to move in the direction opposite to the upper side process;
In the moving process of the moving block 22, the connecting rod 35 is driven to swing through the action of the movable pin 37 and the movable groove 36, the connecting rod 35 swings to drive the belt pulley I19 to rotate, the rotating rod 16 synchronously rotates, the diffusion groove 17 and the sliding pin 18 drive the sieve rods 3 to move at equal intervals, the adjustment of the distance between the sieve rods 3 and the adjustment of the impact plate 8 can be synchronous, the coal stones which can be screened out are ensured to follow the change, the change of screening requirements is realized, the operation difficulty is reduced, and the purpose of quick adjustment is realized.
In the present invention, the hydraulic rod 32 and the driving motor 43 are conventional, and will not be described in detail here.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions, without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.