CN110142082B - Crushing and screening device for coal mine - Google Patents
Crushing and screening device for coal mine Download PDFInfo
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- CN110142082B CN110142082B CN201910469388.2A CN201910469388A CN110142082B CN 110142082 B CN110142082 B CN 110142082B CN 201910469388 A CN201910469388 A CN 201910469388A CN 110142082 B CN110142082 B CN 110142082B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/005—Crushing or disintegrating by reciprocating members hydraulically or pneumatically operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/04—Jaw crushers or pulverisers with single-acting jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/10—Shape or construction of jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- Crushing And Grinding (AREA)
Abstract
The invention belongs to the technical field of coal separation machinery, and particularly relates to a crushing and screening device for a coal mine, which comprises a hinge type crusher, a bracket, a belt conveyor and a parallel type vibrating screen, wherein the hinge type crusher comprises a driving shaft support, a box body and a motor; the box body support and the driving shaft support are both welded on the support, the motor is installed on the support, the box body is fixed with the support through bolts, and the outer wall of the box body is provided with the controller; the crushing hinge can prevent the crusher from being damaged when large and hard gangue or other sundries cannot be crushed, the normal operation of the crusher is guaranteed, the crushing hinge can extrude, split, break, grind and crush lump coal, the crushing forms are various, the crushing effect is good, the falling amount of the uncrushed lump coal is reduced when the gangue with large diameter is separated, and the workload of recrushing the uncrushed lump coal in the later period is reduced.
Description
Technical Field
The invention belongs to the technical field of coal preparation machinery, and particularly relates to a crushing and screening device for a coal mine.
Background
Coal is an important energy source in China, and green and efficient utilization of coal resources is an important research subject. The raw coal is separated and processed to produce high-quality coal products, so that the emission of pollutants is effectively reduced, the transportation amount is reduced, and the energy utilization rate is improved.
In a coal preparation plant, the crushing operation can meet the requirement of a user on the granularity of the lump coal, and the content of the gangue in the coal is reduced. When the crushing machine works, the crushing machine is required to have enough strength and reliability by the resistance generated by lump coal, gangue and other impurities. When ore with high crushing strength is crushed, the crushing teeth are easily worn. Even the crusher or the overload protection device is damaged, and the crusher or the overload protection device cannot work normally.
The traditional vibrating screen utilizes a vibration exciter to generate exciting force to enable the screen surface to generate reciprocating motion of straight lines, ellipses and other tracks, and materials with different particle sizes are continuously discharged from corresponding screen holes, so that the purpose of sorting is achieved. The parallel mechanism has the advantages of simple structure, strong bearing capacity, various freedom forms, high working precision and the like. The parallel mechanism is applied to the vibrating screen, and has remarkable advantages.
Disclosure of Invention
In order to make up for the defects of the prior art, the crushing and screening device for the coal mine can prevent the crusher from being damaged when large and hard waste rocks or other sundries cannot be crushed, the normal operation of the crusher is guaranteed, the crushing hinge can extrude, split, break, grind and crush lump coal, the crushing forms are various, the crushing effect is good, the falling amount of the uncrushed lump coal is reduced when the waste rocks with large diameters are separated, and the workload of recrushing the uncrushed lump coal in the later period is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a crushing and screening device for a coal mine, which comprises a hinge type crusher, a bracket, a belt conveyor and a parallel type vibrating screen, wherein the hinge type crusher comprises a driving shaft support, a box body and a motor; the box body support and the driving shaft support are both welded on the support, the motor is installed on the support, the box body is fixed with the support through bolts, and the outer wall of the box body is provided with the controller; the fixed jaw plate is welded on the inner wall of the box body, and a separation module is arranged on the inner wall of one side of the box body corresponding to the bottom of the fixed jaw plate; the separation module is used for separating gangue with large diameter from uncrushed lump coal; wherein the content of the first and second substances,
the driving shaft is arranged in a hole at the uppermost part of the hinge support through a bearing, the two driving gears are symmetrically arranged at two sides of the driving shaft through keys, and the driving shaft is arranged on the driving shaft support through the bearing; the belt pulley and the counterweight wheel are respectively arranged at the tail end of the driving shaft through keys; the motor is in transmission connection with the belt pulley through a linkage belt; the two guide shafts are respectively arranged in two holes in the middle of the hinge bracket through bearings, and the four guide gears are symmetrically arranged at the tail ends of the two guide shafts through keys; the driven shaft is arranged in a hole at the lowest part of the hinge support through a bearing, and the two driven gears are symmetrically arranged at two sides of the driven shaft through keys; the two adjusting oil cylinders are hinged to two sides of the driven shaft at one end, and hinged to a support rod at the other end, and the support rod is welded on the inner side of the box body; the crushing hinges are formed by welding crushing plates and chain plates, crushing teeth are machined on the surfaces of the crushing plates, a plurality of crushing hinges and hinge connecting pieces are connected together end to end through hinges to form a crushing chain, and the crushing chain is meshed with the eight gears in sequence; a safety valve is arranged on the adjusting oil cylinder;
the separation module comprises an arc-shaped push plate, a first hydraulic cylinder group, a second hydraulic cylinder group, an upper separation unit and a lower separation arc-shaped steel sheet; the arc-shaped push plate is arranged between the fixed jaw plate and the inner wall of the box body, and one side of the arc-shaped push plate, which is close to the fixed jaw plate, is fixedly connected with the upper separation unit and the lower separation arc-shaped steel sheet from top to bottom in sequence; the first hydraulic cylinder group consists of two first hydraulic cylinders, and the output ends of the two first hydraulic cylinders are respectively hinged with two ends of the top of the other side of the arc-shaped push plate; the second hydraulic cylinder group consists of two second hydraulic cylinders, and the output ends of the two second hydraulic cylinders are respectively hinged with two ends of the bottom of the other side of the arc-shaped push plate; the upper separation unit consists of three upper separation arc steel sheets with the lengths sequentially reduced from top to bottom; a plurality of strip-shaped through holes are formed in the positions, corresponding to the upper separating unit and the lower separating arc-shaped steel sheet, of the fixed jaw plate, and correspond to the upper separating unit and the lower separating arc-shaped steel sheet one by one; the controller is used for controlling the first hydraulic cylinder group and the second hydraulic cylinder group to work.
Preferably, the parallel vibrating screen comprises four parallel vibrating branch chains and an equal-thickness screen; the four parallel vibration branched chains have the same structural form and are all RPC structures, wherein R is a revolute pair, P is a moving pair, C is a cylindrical pair, the axes of the revolute pair are vertical to the axes of the moving pair, and the axes of the revolute pair are parallel to the axes of the cylindrical pair; the first vibration branched chain and the second vibration branched chain are completely the same, the axes of the two vibration branched chains are parallel, and the first vibration branched chain comprises a revolute pair support, a short pin, a guide rod, a vibration spring, a cylindrical auxiliary lug seat and a long pin; the third vibration branched chain and the fourth vibration branched chain are completely the same, the third vibration branched chain is parallel to the motion pair axis of the fourth vibration branched chain, the third vibration branched chain comprises a revolute pair support, a short pin, an electric pull rod, a vibration spring, a guide rod, a cylindrical auxiliary lug seat and a long pin, the electric pull rod and the guide rod are welded together, the tail ends of the guide rods of the four parallel vibration branched chains are all provided with threads, nuts are connected with the tail ends of the guide rods through the threads, and the guide rods penetrate through holes at the bottoms of the cylindrical auxiliary lug seats and the vibration spring and are installed together; the revolute pair supports of the four parallel vibration branched chains are fixed on a bearing structure through bolts; four lifting rings are welded on a screen box of the equal-thickness screen, and the cylindrical auxiliary lug seat is connected with the lifting rings on the equal-thickness screen through the long pin.
Preferably, the cross section of the strip-shaped through hole is arc-shaped, and the arc degree of the strip-shaped through hole is increased when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet extend out; when the device works, when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet extend out through the strip-shaped through hole, the tops of the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet are attached to the inner wall of the top of the strip-shaped through hole, at the moment, the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet have the tendency of bending downwards, when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet continue to extend out, one ends of the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet far away from the arc-shaped push plate bend downwards, thereby can make the bottom of lower separation arc steel sheet to the direction removal of being close to the big waste rock of diameter, separate the big waste rock of diameter and not broken lump coal, go up the block coal of separation arc steel sheet at waste rock top and separate into the multipart, avoid the lump coal of waste rock top to drop together when the waste rock drops to the work load that the later stage carries out breakage to the not broken lump coal that drops has been reduced.
Preferably, one end of the lower separation arc-shaped steel sheet, which is far away from the arc-shaped push plate, is fixedly connected with an arc-shaped metal strip; the bending direction of the arc-shaped metal strip is opposite to that of the lower separation arc-shaped steel sheet, and the hardness of the arc-shaped metal strip is smaller than that of the lower separation arc-shaped steel sheet; the during operation, when separating the arc steel sheet down when touching the big waste rock of diameter at the in-process that stretches out, the radian of arc metal strip bottom is big, at this moment, the cambered surface of arc metal strip can be followed the top removal of the big waste rock of diameter, and the hardness ratio of arc metal strip separates the arc steel sheet down lowly, at this moment, the arc metal strip is yielding to be removed with quick gap between the big waste rock of not broken lump coal of edge and diameter, the work efficiency of separation arc steel sheet under the improvement, the volume of dropping of not broken lump coal when reducing the big waste rock of diameter and dropping.
The invention has the following beneficial effects:
1. according to the invention, the flexible crushing hinge mechanism is designed to replace the original rigid crushing device, the elastic distance between the fixed jaw plate and the crushing chain is controlled by the adjusting oil cylinder, the lump coal can be crushed to a certain granularity, when large and hard waste rocks or other sundries cannot be crushed, the crusher can be prevented from being damaged, the normal operation of the crusher is ensured, the crushing hinge can extrude, split, break, grind and crush the lump coal, the crushing form is various, and the crushing effect is good.
2. The vibrating screen has the advantages that the 4-RPC vibrating branch chain is used for enabling the vibrating screen to have vibration along the X, Y, Z direction and rotation around the X direction. The angle of the vibrating screen is adjusted through changing the telescopic length of the electric pull rod, the control is flexible, coal is distributed more uniformly on the sunning surface, the screening efficiency is improved, the kinematic pairs adopted by the four parallel vibration branch chains are all low pairs, the manufacturing and installation are simple, the bearing capacity is strong, the parallel mechanism is adopted to enable the vibrating screen to be wide in working range, the vibration amplitude can be controlled, and the screening effect is good.
3. According to the invention, the separation module is arranged between the fixed jaw plate and the inner wall of the box body, the gangue with large diameter and the uncrushed lump coal can be separated by using the upper separation unit and the lower separation arc-shaped steel sheet, the uncrushed lump coal can be prevented from falling along with the gangue with large diameter when the distance between the crushing hinge mechanism and the fixed jaw plate is increased to release the gangue with large diameter, the upper separation unit and the lower separation arc-shaped steel sheet can be clamped with the crushing teeth on the crushing plate, the dropping of the gangue is accelerated, the workload of recrushing the uncrushed lump coal in the later period can be reduced, and the working efficiency can be improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic diagram of the overall structure of a coal mine crushing and screening device;
FIG. 2 is a schematic half-section view of a hinged crusher;
FIG. 3 is a schematic view of a fragmentation hinge;
FIG. 4 is a schematic view of a first branch chain;
FIG. 5 is a schematic view of a third branch;
FIG. 6 is an enlarged partial schematic view at A in FIG. 2;
in the figure: 1. a hinged crusher; 2. a support; 3. a belt conveyor; 4. a parallel vibrating screen; 101. a belt pulley; 102. a drive shaft support; 103. a box body support; 104. a drive gear; 105. a crushing hinge; 106. a hinge connecting piece; 107. a weight wheel; 108. a drive shaft; 109. a hinge bracket; 110. an electric motor; 111. adjusting the oil cylinder; 112. a support bar; 113. a driven gear; 114. a driven shaft; 115. a box body; 116. a guide gear; 117. a guide shaft; 118. fixing a jaw plate; 119. a breaker plate; 120. a chain pin; 121. a chain plate; 401. a first vibrating branch chain; 402. a second vibrating branch chain; 403. a third vibrating branch chain; 404. a fourth vibrating branch chain; 405. a hoisting ring; 406. a revolute pair support; 407. a short pin; 408. an electric pull rod; 409. a vibration spring; 410. a guide bar; 411. a cylindrical auxiliary ear seat; 412. a long pin; 5. a separation module; 501. an arc-shaped push plate; 502. a first hydraulic cylinder group; 503. a second hydraulic cylinder group; 504. an upper separation unit; 505. separating the arc-shaped steel sheets; 506. an arc-shaped metal strip; 507. and a strip-shaped through hole.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 6, a crushing and screening device for coal mine comprises a hinge-type crusher 1, a bracket 2, a belt conveyor 3 and a parallel-type vibrating screen 4, wherein the hinge-type crusher 1 comprises a driving shaft support 102, a box support 103, a box 115 and a motor 110; the box body support 103 and the driving shaft support 102 are both welded on the bracket 2, the motor 110 is installed on the bracket 2, the box body 115 is fixed with the bracket 2 through bolts, and a controller is installed on the outer wall of the box body 115; the fixed jaw plate 118 is welded on the inner wall of the box body 115, and a separation module is arranged on the inner wall of one side of the box body corresponding to the bottom of the fixed jaw plate; the separation module 5 is used for separating gangue with large diameter from uncrushed lump coal; wherein the content of the first and second substances,
the driving shaft 108 is bearing-mounted in the uppermost hole of the hinge bracket 109, the two driving gears 104 are symmetrically key-mounted on both sides of the driving shaft 108, and the driving shaft 108 is bearing-mounted on the driving shaft support 102; the belt pulley 101 and the counterweight wheel 107 are respectively arranged at the tail end of the driving shaft 108 through keys; the motor 110 is in transmission connection with the belt pulley 101 through a linkage belt; the two guide shafts 117 are respectively installed in two holes in the middle of the hinge bracket 109 through bearings, and the four guide gears 116 are symmetrically installed at the tail ends of the two guide shafts 117 through keys; the driven shaft 114 is installed in the lowest hole of the hinge bracket 109 through a bearing, and the two driven gears 113 are symmetrically installed on the two sides of the driven shaft 114 through keys; one ends of the two adjusting oil cylinders 111 are hinged to two sides of the driven shaft 114, the other ends of the two adjusting oil cylinders are hinged to a supporting rod 112, and the supporting rod 112 is welded on the inner side of the box body 115; the crushing hinges 105 are formed by welding crushing plates 119 and chain plates 121, crushing teeth are machined on the surfaces of the crushing plates 119, a plurality of crushing hinges 105 are connected with hinge connecting plates 106 end to end through hinges to form a crushing chain, and the crushing chain is meshed with eight gears in sequence; a safety valve is arranged on the adjusting oil cylinder 111;
the separation module 5 comprises an arc-shaped push plate 501, a first hydraulic cylinder group 502, a second hydraulic cylinder group 503, an upper separation unit 504 and a lower separation arc-shaped steel sheet 505; the arc-shaped push plate 501 is arranged between the fixed jaw 118 and the inner wall of the box body 115, and one side of the arc-shaped push plate 501, which is close to the fixed jaw 118, is fixedly connected with the upper separation unit 504 and the lower separation arc-shaped steel sheet 505 in sequence from top to bottom; the first hydraulic cylinder group 502 is composed of two first hydraulic cylinders, and the output ends of the two first hydraulic cylinders are respectively hinged with two ends of the top of the other side of the arc-shaped push plate 501; the second hydraulic cylinder group 503 is composed of two second hydraulic cylinders, and output ends of the two second hydraulic cylinders are respectively hinged with two ends of the bottom of the other side of the arc-shaped push plate 501; the upper separation unit 504 is composed of three upper separation arc-shaped steel sheets with sequentially reduced lengths from top to bottom; a plurality of strip-shaped through holes 507 are formed in the positions, corresponding to the upper separating unit 504 and the lower separating arc-shaped steel sheet 505, of the fixed jaw 118, and the strip-shaped through holes 507 are in one-to-one correspondence with the upper separating unit 504 and the lower separating arc-shaped steel sheet 505; the controller is used for controlling the first hydraulic cylinder group 502 and the second hydraulic cylinder group 503 to work.
The parallel vibrating screen 4 comprises four parallel vibrating branch chains and an equal-thickness screen; the four parallel vibration branched chains have the same structural form and are all RPC structures, wherein R is a revolute pair, P is a moving pair, C is a cylindrical pair, the axes of the revolute pair are vertical to the axes of the moving pair, and the axes of the revolute pair are parallel to the axes of the cylindrical pair; the first vibration branched chain 401 and the second vibration branched chain 402 are completely the same, the axes of the kinematic pairs of the two vibration branched chains are parallel, and the first vibration branched chain 401 comprises a revolute pair support 406, a short pin 407, a guide rod 410, a vibration spring 409, a cylindrical auxiliary lug seat 411 and a long pin 412; the third vibrating branched chain 403 is identical to the fourth vibrating branched chain 404, the kinematic pair axes of the third vibrating branched chain 403 and the fourth vibrating branched chain 404 are parallel, the third vibrating branched chain 403 comprises a revolute pair support 406, a short pin 407, an electric pull rod 408, a vibrating spring 409, a guide rod 410, a cylindrical secondary lug seat 411 and a long pin 412, the electric pull rod 408 and the guide rod 410 are welded together, the tail ends of the guide rods 410 of the four parallel vibrating branched chains are all provided with threads, nuts are connected with the tail ends of the guide rods 410 through the threads, and the guide rods 410 penetrate through holes at the bottoms of the cylindrical secondary lug seats 411 and the vibrating spring 409 and are installed together; the revolute pair supports 406 of the four parallel vibration branched chains are fixed on a bearing structure through bolts; four hanging rings 405 are welded on a screen box of the equal-thickness screen, and a cylindrical auxiliary lug seat 411 is connected with the hanging rings 405 on the equal-thickness screen through a long pin 412.
The cross section of the strip-shaped through hole 507 is arc-shaped, and the strip-shaped through hole 507 is used for increasing the radian when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet 505 extend out; when the device works, when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet 505 extend out through the strip-shaped through hole 507, the tops of the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet 505 are attached to the inner wall of the top of the strip-shaped through hole 507, at the moment, the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet 505 have the tendency of bending downwards, when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet 505 continue to extend, one end of the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet 505 far away from the arc-shaped push plate 501 bends downwards, thereby can make the bottom of lower separation arc steel sheet 505 can remove to the direction of being close to the big waste rock of diameter, separate the big waste rock of diameter and the piece coal of not broken, go up the separation arc steel sheet and separate into the multipart with the piece coal at waste rock top, avoid the piece coal of waste rock top to drop together when the waste rock drops to the work load that the later stage carries out breakage to the piece coal of not broken that drops has been reduced.
One end of the lower separation arc-shaped steel sheet 505, which is far away from the arc-shaped push plate, is fixedly connected with an arc-shaped metal strip 506; the bending direction of the arc-shaped metal strip 506 is opposite to that of the lower separation arc-shaped steel sheet 505, and the hardness of the arc-shaped metal strip 506 is smaller than that of the lower separation arc-shaped steel sheet 505; during operation, when separating arc steel sheet 505 and touch the big waste rock of diameter at the in-process that stretches out down, the radian of arc metal strip 506 bottom is big, at this moment, the cambered surface of arc metal strip 506 can be followed the top removal of the big waste rock of diameter, and the hardness of arc metal strip 506 is lower than separating arc steel sheet 505 down, at this moment, arc metal strip 506 is yielding to be removed with quick gap between the big waste rock of unbroken lump coal and diameter along, the work efficiency of separating arc steel sheet 505 down improves, the volume of dropping of unbroken lump coal when reducing the big waste rock of diameter and dropping.
When the crushing device works, before the crushing device starts to work, the adjusting oil cylinder 111 is communicated with an external hydraulic system, the first hydraulic cylinder group 502 and the second hydraulic cylinder group 503 are communicated with another external hydraulic system, the telescopic length of the adjusting oil cylinder 111 is adjusted through the controller, so that the surface of the whole crushing hinge 105 and the surface of the fixed jaw plate 118 reach a proper angle, the motor 110 drives the belt pulley 101 to rotate, the driving shaft 108 rotates along with the belt pulley 101, lump coal enters the box body 115 through the feeding hole, the rotating driving gear 113 drives the whole crushing hinge 105 to rotate, the crushing hinge 105 extrudes, splits, breaks and grinds the entering lump coal to reach the granularity required by a user. The damage of gangue with high hardness to crushing equipment can be effectively avoided through flexible hinge connection; when gangue with larger diameter is encountered and cannot be crushed, the pressure of the crushing hinge 105 is increased through extrusion, the pressure in the adjusting oil cylinder 111 is continuously increased, when the pressure in the cylinder reaches a set value, the safety valve is unloaded, the adjusting oil cylinder 111 contracts to increase the distance between the crushing hinge 105 and the fixed jaw plate 118, the gangue falls from the discharge hole to play a role in overload protection, a sensor can be arranged on the adjusting oil cylinder 111 for sensing the opening and closing state of the safety valve, the sensor transmits a sensed signal to the controller when the safety valve is unloaded, the controller controls the first hydraulic cylinder group 502 and the second hydraulic cylinder group 503 to work, the working speed of the output end of the first hydraulic cylinder group 502 is higher than that of the output end of the second hydraulic cylinder group 503, so that the top and the bottom of the arc-shaped push plate 501 are simultaneously contacted with the inner side wall of the fixed jaw plate 118, at the moment, the upper separation unit 504 and the lower separation arc-shaped steel sheet 505 divide uncrushed lump coal and large-diameter gangue between the fixed jaw 118 and the crushing hinge 105 into a plurality of parts, the lower separation arc-shaped steel sheet 505 can isolate the large-diameter gangue independently, meanwhile, one end of the upper separation arc-shaped steel sheet 505 and one end of the lower separation arc-shaped steel sheet 505 can be clamped with the crushing teeth on the crushing hinge 119, the large-diameter gangue can be pushed out when the crushing hinge 105 rotates, the crushing hinge 105 is prevented from being damaged, when the upper separation arc-shaped steel sheet 505 and the lower separation arc-shaped steel sheet 505 extend through the strip-shaped through hole 507, the top of the upper separation arc-shaped steel sheet 505 and the top of the strip-shaped through hole 507 are attached, at the moment, the upper separation arc-shaped steel sheet 505 and the lower separation arc-shaped steel sheet 505 have a downward bending tendency, and when the upper separation arc-shaped steel sheet 505, one end of the upper separation arc-shaped steel sheet and one end of the lower separation arc-shaped steel sheet 505, which is far away from the arc-shaped push plate 501, are bent downwards, so that the bottom of the lower separation arc-shaped steel sheet 505 can move towards the direction close to the gangue with a large diameter, the gangue with the large diameter is separated from the uncrushed lump coal, the lump coal at the top of the gangue is separated into multiple parts by the upper separation arc-shaped steel sheet, the lump coal above the gangue is prevented from falling together when the gangue falls, when the lower separation arc-shaped steel sheet 505 touches the gangue with the large diameter in the extending process, the radian at the bottom of the arc-shaped metal strip 506 is large, at the moment, the arc surface of the arc-shaped metal strip 506 can move along the top of the gangue with the large diameter, the hardness of the arc-shaped metal strip 506 is lower than that of the lower separation arc-shaped steel sheet 505, at the moment, the arc-shaped metal strip, under the action of gravity, the material can be effectively prevented from blocking a discharge hole, after the gangue with large diameter is separated from the crushing hinge 105, the controller controls the adjusting oil cylinder 111 to reset, and simultaneously controls the first hydraulic cylinder group 502 and the second hydraulic cylinder group 503 to reset, so that the hinge type crusher 1 continues to work;
broken coal falls onto belt conveyor 3 through the discharge gate, belt conveyor 3 transports coal to 4 sifters of parallel shale shaker, under the effect of vibration exciter, the shale shaker can be followed X, Y, Z direction vibration and rotated around the X direction, coal on the sifter constantly moves from the pan feeding end to the discharge end, the coal of different granularities sees through the sifter through corresponding sieve mesh, thereby reach the purpose of screening the coal of different granularities, through adjusting the flexible length of electric pull rod 408, change the inclination of sifter, make the coal that shines the face distribute evenly, four parallelly connected branch chains bearing capacity is strong simultaneously, the range of vibration can regulation control, the effect of vibratory screening has been improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a crushing and screening device for coal mine which characterized in that: the crusher comprises a hinge type crusher (1), a support (2), a belt conveyor (3) and a parallel type vibrating screen (4), wherein the hinge type crusher (1) comprises a driving shaft support (102), a box body support (103), a box body (115) and a motor (110); the box body support (103) and the driving shaft support (102) are both welded on the support (2), the motor (110) is installed on the support (2), the box body (115) is fixed with the support (2) through bolts, and a controller is installed on the outer wall of the box body (115); the fixed jaw plate (118) is welded on the inner wall of the box body (115), and a separation module is arranged on the inner wall of one side of the box body corresponding to the bottom of the fixed jaw plate; the separation module (5) is used for separating gangue with large diameter from uncrushed lump coal; the driving shaft (108) is installed in the uppermost hole of the hinge bracket (109) through a bearing, the two driving gears (104) are symmetrically installed on two sides of the driving shaft (108) through keys, and the driving shaft (108) is installed on the driving shaft support (102) through a bearing; the belt pulley (101) and the counterweight wheel (107) are respectively arranged at the tail end of the driving shaft (108) through keys; the motor (110) is in transmission connection with the belt pulley (101) through a linkage belt; two guide shafts (117) are respectively arranged in two holes in the middle of the hinge bracket (109) through bearings, and four guide gears (116) are symmetrically arranged at the tail ends of the two guide shafts (117) through keys; the driven shaft (114) is arranged in a hole at the lowest part of the hinge support (109) through a bearing, and the two driven gears (113) are symmetrically arranged at two sides of the driven shaft (114) through keys; one ends of the two adjusting oil cylinders (111) are hinged to two sides of the driven shaft (114), the other ends of the two adjusting oil cylinders are hinged to the supporting rod (112), and the supporting rod (112) is welded on the inner side of the box body (115); the crushing hinges (105) are formed by welding crushing plates (119) and chain plates (121), crushing teeth are machined on the surfaces of the crushing plates (119), a plurality of crushing hinges (105) are connected with hinge connecting pieces (106) end to end through hinges to form a crushing chain, and the crushing chain is meshed with the eight gears in sequence; a safety valve is arranged on the adjusting oil cylinder (111);
the separating module (5) comprises an arc-shaped push plate (501), a first hydraulic cylinder group (502), a second hydraulic cylinder group (503), an upper separating unit (504) and a lower separating arc-shaped steel sheet (505); the arc-shaped push plate (501) is arranged between the fixed jaw plate (118) and the inner wall of the box body (115), and one side, close to the fixed jaw plate (118), of the arc-shaped push plate (501) is fixedly connected with an upper separation unit (504) and a lower separation arc-shaped steel sheet (505) from top to bottom in sequence; the first hydraulic cylinder group (502) is composed of two first hydraulic cylinders, and the output ends of the two first hydraulic cylinders are respectively hinged with the two ends of the top of the other side of the arc-shaped push plate (501); the second hydraulic cylinder group (503) is composed of two second hydraulic cylinders, and the output ends of the two second hydraulic cylinders are respectively hinged with two ends of the bottom of the other side of the arc-shaped push plate (501); the upper separation unit (504) is composed of three upper separation arc steel sheets with the lengths sequentially reduced from top to bottom; a plurality of strip-shaped through holes (507) are formed in the positions, corresponding to the upper separation unit (504) and the lower separation arc-shaped steel sheet (505), of the fixed jaw plate (118), and the strip-shaped through holes (507) correspond to the upper separation unit (504) and the lower separation arc-shaped steel sheet (505) one by one; the controller is used for controlling the adjusting oil cylinder (111), the first hydraulic cylinder group (502) and the second hydraulic cylinder group (503) to work.
2. A coal mine crushing and screening apparatus according to claim 1, wherein: the parallel vibrating screen (4) comprises four parallel vibrating branch chains and an equal-thickness screen; the four parallel vibration branched chains have the same structural form and are all RPC structures, wherein R is a revolute pair, P is a moving pair, C is a cylindrical pair, the axes of the revolute pair are vertical to the axes of the moving pair, and the axes of the revolute pair are parallel to the axes of the cylindrical pair; the first vibration branched chain (401) and the second vibration branched chain (402) are completely the same, the axes of the kinematic pairs of the two vibration branched chains are parallel, and the first vibration branched chain (401) comprises a revolute pair support (406), a short pin (407), a guide rod (410), a vibration spring (409), a cylindrical auxiliary lug seat (411) and a long pin (412); the third vibration branched chain (403) and the fourth vibration branched chain (404) are completely the same, the axes of a kinematic pair of the third vibration branched chain (403) and the fourth vibration branched chain (404) are parallel, the third vibration branched chain (403) comprises a revolute pair support (406), a short pin (407), an electric pull rod (408), a vibration spring (409), a guide rod (410), a cylindrical auxiliary lug seat (411) and a long pin (412), the electric pull rod (408) and the guide rod (410) are welded together, the tail ends of the guide rods (410) of the four parallel vibration branched chains are provided with threads, nuts are connected with the tail end of the guide rod (410) through the threads, and the guide rod (410) penetrates through a hole at the bottom of the cylindrical auxiliary lug seat (411) and the vibration spring (409) and is installed together; the revolute pair supports (406) of the four parallel vibration branched chains are fixed on a bearing structure through bolts; four hanging rings (405) are welded on a screen box of the equal-thickness screen, and the cylindrical auxiliary lug seat (411) is connected with the hanging rings (405) on the equal-thickness screen through long pins (412).
3. A coal mine crushing and screening apparatus according to claim 1, wherein: the cross section of the strip-shaped through hole (507) is arc-shaped, and the radian of the strip-shaped through hole (507) is increased when the upper separation arc-shaped steel sheet and the lower separation arc-shaped steel sheet (505) extend out.
4. A coal mine crushing and screening apparatus according to claim 1, wherein: one end of the lower separation arc-shaped steel sheet (505) far away from the arc-shaped push plate is fixedly connected with an arc-shaped metal strip (506); the bending direction of the arc-shaped metal strip (506) is opposite to that of the lower separation arc-shaped steel sheet (505), and the hardness of the arc-shaped metal strip (506) is smaller than that of the lower separation arc-shaped steel sheet (505).
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| CN201910469388.2A CN110142082B (en) | 2019-05-31 | 2019-05-31 | Crushing and screening device for coal mine |
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| CN201910469388.2A CN110142082B (en) | 2019-05-31 | 2019-05-31 | Crushing and screening device for coal mine |
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