Pretreatment device in coal washing equipment

Abstract

The invention relates to the technical field of coal crushing, and discloses a pretreatment device in coal washing equipment, which comprises a protective shell for bearing coal, a crushing unit positioned in the protective shell and used for crushing the coal, a separation unit for separating impurities from the crushed coal, and a cleaning unit for cleaning the crushing unit, the crushing unit comprises a rolling assembly for adjusting according to the hardness of the coal and a transmission assembly for driving the separation unit to synchronously operate; and the rolling assembly comprises a grinding roller for rolling and crushing the coal. An adjusting disc is driven by a stepping motor to rotate anticlockwise or clockwise, so that the distance between a grinding strip and a pressing block is reduced or increased, the grinding strength is improved or reduced, the device can adjust the corresponding grinding strength according to the hardness of coal briquettes, and the grinding efficiency of the device is reduced when the device grinds the coal briquettes. And the probability that the coal blocks the crushing roller or spattering occurs due to the huge grinding force of the crushing roller is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coal crushing, and more specifically, to a pre-processing device in coal washing equipment. Background Art

[0002] Most of the mined coal blocks contain impurities such as gangue, stones, iron impurities, coal slime and dust. The coal blocks need to be broken up by a crusher, and then the coal needs to be washed to separate the various impurities in the coal.

[0003] The existing patent (patent publication number: CN116237115A) discloses a pre-treatment device in a coal washing equipment, including: an operating table, an adjusting mechanism is arranged on the upper part of the operating table, and the adjusting mechanism includes a mounting frame, a fixed block and a movable block are arranged inside the mounting frame, a second drive shaft is arranged on the side of the fixed block, and a first drive shaft is arranged on the side of the movable block. The present invention drives the driving wheel to rotate through a servo motor, drives the driven wheel to rotate through a driving belt, drives the connecting shaft to rotate the pinion, drives the large gear to rotate through the pinion, drives the first drive shaft to rotate the crushing roller and the first gear, rotates the second gear meshing with it, rotates the first drive shaft and the second drive shaft, rotates in opposite directions, and crushes the coal ore between the first crushing roller and the second crushing roller, and falls through the discharge port of the operating table, and a conveying mechanism is arranged at the lower part of the operating table, and the crushed coal ore is discharged through the conveying mechanism.

[0004] In the process of implementing the above-mentioned scheme, the inventors found that the prior art had the following unresolved problems: in the process of crushing coal, the prior art cannot adjust the spacing between the crushing rollers according to the hardness of the coal, so that the grinding intensity of the existing device is constant. As we all know, the hardness and gangue content of coal blocks produced in different regions and at different depths are different. When the existing device encounters coal blocks or gangue whose hardness or volume exceeds the carrying range of the grinding equipment, it is easy for the crushing roller to get stuck, and the huge crushing pressure of the crushing roller may cause the ground material to splash, posing certain safety hazards. Summary of the invention

[0005] The present invention provides a pre-treatment device in coal washing equipment, which solves the technical problem in the related art that the distance between the crushing roller and the pressing plate cannot be adjusted according to the hardness of the coal so that the grinding intensity of the existing device is constant.

[0006] The present invention provides a pre-treatment device in coal washing equipment, comprising a protective shell for carrying coal, a crushing unit located in the protective shell for crushing the coal, a separation unit for separating impurities from the crushed coal, and a cleaning unit for cleaning the crushing unit, wherein the crushing unit comprises a rolling assembly adjusted according to the hardness of the coal and a transmission assembly for driving the separation unit to operate synchronously, and the rolling assembly comprises a grinding roller for rolling and crushing the coal; The grinding roller is provided with a plurality of receiving grooves horizontally, and the plurality of receiving grooves are slidably connected with grinding strips whose lengths are adjusted to extend out of the receiving grooves according to the hardness of the coal. The grinding roller is provided with a rotating shaft horizontally penetrating therethrough for driving the grinding roller to rotate, and the rotating shaft is fixedly connected to the grinding roller; The separation unit comprises a connection component that follows the transmission component to run and a screening component that performs skip screening on the crushed coal.

[0007] Preferably, a landslide is fixedly connected to the top of the protective shell, discharge ports are provided on both sides of the protective shell, water inlet holes are horizontally symmetrically provided on both sides of the protective shell, an atomizer is provided in the water inlet hole, one end of the atomizer extends out of the water inlet hole, a water belt is provided on one side of the atomizer, one end of the atomizer extends into the water belt, and the atomizer is fixedly connected to the water belt.

[0008] Preferably, a partition plate is fixedly connected to the bottom of the inner wall of the protective shell, a first slide groove is vertically opened on the inner wall of the protective shell, a second slide groove is vertically opened on the inner wall of the first slide groove, a blocking plate is slidably connected in the first slide groove, a first limit strip is slidably connected in the second slide groove, and the blocking plate is fixedly connected to the first limit strip.

[0009] Preferably, a third sliding groove is vertically opened on one side of the inner wall of the protective shell, a fourth sliding groove is vertically opened on one side of the partition plate, a first limiting groove is vertically opened on one side of the protective shell, a accommodating hole is horizontally opened on the protective shell, a first connecting hole is vertically opened on the bottom of the inner wall of the first limiting groove, the bottom end of the first connecting hole is connected to the internal space of the protective shell, and two fixed pulleys are fixedly connected to the bottom of the inner wall of the protective shell.

[0010] Preferably, limit plates and adjustment plates are provided on both sides of the grinding roller, and the limit plates and adjustment plates are both located in the accommodating hole. The limit plates are connected to the rotating shaft through bearings, one side of the limit plates is in contact with the grinding roller, and the other side of the limit plates is fixedly connected to a limit rod, and the limit rod is connected to the limit block through a torsion spring, and a plurality of limit grooves are horizontally provided on the limit plates.

[0011] Preferably, the adjusting disk is fixedly connected to the rotating shaft, a ratchet is fixedly connected to one side of the adjusting disk, the ratchet is engaged with the limit block, a plurality of adjusting grooves are horizontally provided on the adjusting disk, the adjusting grooves are connected with the limit slide grooves, an adjusting rod is horizontally provided through the grinding strip, the adjusting rod is fixedly connected to the grinding strip, both ends of the adjusting rod extend respectively into the adjusting grooves provided on the symmetrically arranged adjusting disk, and an electromagnet is embedded on the grinding roller.

[0012] Preferably, the transmission assembly comprises a stepper motor, a transmission gear is fixedly connected to the output end of the stepper motor, the output end of the stepper motor is fixedly connected to the rotating shaft, and a limit frame is fixedly connected to the stepper motor.

[0013] Preferably, the connecting assembly includes a rack meshing with a transmission gear, one side of the rack is fixedly connected to a limiting slider, the limiting slider is slidably connected in a first limiting groove, the top of the limiting slider is fixedly connected to a first elastic member, one end of the first elastic member is fixedly connected to the inner wall of the first limiting groove, and the bottom of the limiting slider is fixedly connected to a synchronization rope.

[0014] Preferably, the screening assembly includes a first slider and a second slider which are respectively slidably connected to the third slide groove and the fourth slide groove, a first filter screen is arranged between the first slider and the second slider, one end of the synchronization rope passes through the fixed pulley and is fixedly connected to the bottom of the first filter screen, one end of the first filter screen is fixedly connected to the first slider, the other end of the first filter screen is fixedly connected to the first slider, a second filter screen is arranged on one side of the first filter screen, one end of the second filter screen is fixedly connected to the partition plate, the other end of the second filter screen is fixedly connected to the inner wall of the protective shell, the first slider and the second slider are both fixedly connected to a second elastic member at the bottom, and one end of the second elastic member is fixedly connected to the bottom of the inner wall of the protective shell.

[0015] Preferably, the cleaning unit includes a second limiting strip fixed on the inner wall of the protective shell, a second limiting groove is horizontally opened on the second limiting strip, a scraper is slidably connected in the second limiting groove, one end of the scraper extends out of the second limiting groove, one end of the scraper extending out of the second limiting groove is in contact with the outer wall of the grinding roller, one end of the scraper located in the second limiting groove is fixedly connected to a plurality of third elastic parts, and one end of the plurality of third elastic parts are all fixedly connected to the inner wall of the second limiting groove.

[0016] The beneficial effects of the present invention are: The present invention drives the adjusting disk to rotate counterclockwise by a stepping motor, thereby reducing the distance between the grinding bar and the pressing block, thereby improving the grinding intensity, so that the device can adjust the corresponding grinding intensity according to the hardness of the coal block, thereby reducing the probability of the coal block getting stuck in the crushing roller when the device is grinding the coal block or the coal block being sputtered due to the huge crushing pressure of the crushing roller.

[0017] The present invention uses a magnetic field generated by energizing the electromagnet to attract iron impurities in the coal block, so that the iron impurities are adsorbed on the surfaces of the grinding roller and the grinding bar, thereby separating the iron impurities in the coal block from the coal block, improving the accuracy of the coal block, reducing the difficulty of subsequent washing and reducing the washing cost. At the same time, the sulfide in the coal block has weak magnetism and may also be adsorbed on the surfaces of the grinding roller and the grinding bar under the attraction of the electromagnet. Although it cannot be completely removed, it can effectively reduce the content of sulfide in the ground and crushed coal block, further reducing the difficulty of subsequent washing and reducing the washing cost.

[0018] In the present invention, atomized water droplets gradually descend, so that the water droplets come into contact with the coal on the top of the first filter and the iron impurities and sulfides on the second filter, and the water droplets continuously enter the protective shell, so that the water droplets clean the coal, iron impurities and sulfides, and clean the soil, dust and coal slime carried by the coal, iron impurities and sulfides, and then fall into the first space and the second space, thereby further removing impurities contained in the coal blocks and collecting coal slime and water resources to avoid waste of resources.

[0019] The present invention continuously engages and separates the transmission gear and the rack, thereby continuously driving the first filter screen to periodically rise and fall along the third chute and the fourth chute, jigs the coal on the first filter screen, shakes off impurities such as coal slime and dust attached to the surface of the coal, and further reduces the difficulty of washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the protective housing of the present invention; Figure 3 is a schematic cross-sectional view of the protective housing structure of the present invention; Figure 4 is a schematic cross-sectional view of the protective housing structure of the present invention; Figure 5 It is an enlarged schematic diagram of the structure of the protective shell part of the present invention; Figure 6 It is a schematic diagram of the structure of the crushing unit of the present invention; Figure 7 It is an exploded schematic diagram of the rolling assembly structure of the present invention; Figure 8 It is a schematic diagram of the structure of the limit plate and the adjustment plate of the present invention; Fig. 9 It is a schematic diagram of the transmission assembly structure of the present invention; Fig.10 It is a schematic diagram of the structure of the connection assembly and the screening assembly of the present invention; Fig.11is a schematic diagram of the first filter structure of the present invention; Fig.12 It is a schematic diagram of the cleaning unit structure of the present invention.

[0021] In the figure: 1, protective shell; 11, landslide; 12, discharge port; 13, water inlet; 14, atomizer; 15, water belt; 16, partition plate; 17, first chute; 18, second chute; 19, blocking plate; 110, first limit strip; 111, third chute; 112, fourth chute; 113, first limit slot; 114, receiving hole; 115, first connecting hole; 116, fixed pulley; 2, crushing unit; 21, rolling assembly; 211, grinding roller; 212, receiving slot; 213, grinding strip; 214, rotating shaft; 215, limit plate; 216, adjusting plate; 217, limit rod; 218, limit block; 219, limit Slide groove; 2110, ratchet; 2111, adjustment groove; 2112, adjustment rod; 2113, electromagnet; 22, transmission assembly; 221, stepper motor; 222, transmission gear; 223, limit frame; 3, separation unit; 31, connection assembly; 311, rack; 312, limit slider; 313, first elastic member; 314, synchronization rope; 32, screening assembly; 321, first slider; 322, second slider; 323, first filter; 324, second filter; 325, second elastic member; 326, limit column; 4, cleaning unit; 41, second limit strip; 42, second limit groove; 43, scraper; 44, third elastic member. DETAILED DESCRIPTION

[0022] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0023] like Figure 1 - Fig.12As shown, the present embodiment provides a pre-treatment device in coal washing equipment, including a protective shell 1 for carrying coal, a crushing unit 2 located in the protective shell 1 for crushing the coal, a separation unit 3 for separating impurities from the crushed coal, and a cleaning unit 4 for cleaning the crushing unit 2, wherein the crushing unit 2 includes a rolling assembly 21 adjusted according to the hardness of the coal and a transmission assembly 22 for driving the separation unit 3 to operate synchronously, the rolling assembly 21 includes a grinding roller 211 for rolling and crushing the coal; a plurality of receiving grooves 212 are horizontally provided on the grinding roller 211, and the plurality of receiving grooves 212 are slidably connected with grinding bars 213 whose lengths extend out of the receiving grooves 212 according to the hardness of the coal; a rotating shaft 214 for driving the grinding roller 211 to rotate is horizontally penetrated on the grinding roller 211, and the rotating shaft 214 is fixedly connected to the grinding roller 211; the separation unit 3 includes a connecting assembly 31 that runs following the transmission assembly 22 and a screening assembly 32 for skipping the crushed coal.

[0024] It should be noted that: Figure 2 As shown: a pressing block is arranged between the protective shell 1 and the grinding roller 211, the pressing block is fixedly connected to the inner wall of the protective shell 1, and the grinding roller 211 cooperates with the pressing block to grind and crush the coal block.

[0025] It should be noted that: Figure 7 As shown, the number of the receiving grooves 212 and the number of the grinding strips 213 are equal, and the number of the receiving grooves 212 and the grinding strips 213 can be one, two or more. Figure 7 Only eight are taken as examples.

[0026] A landslide 11 is fixedly connected to the top of the protective shell 1, discharge ports 12 are provided on both sides of the protective shell 1, water inlet holes 13 are horizontally symmetrically provided on both sides of the protective shell 1, an atomizer 14 is provided in the water inlet hole 13, one end of the atomizer 14 extends out of the water inlet hole 13, a water conveying belt 15 is provided on one side of the atomizer 14, one end of the atomizer 14 extends into the water conveying belt 15, and the atomizer 14 is fixedly connected to the water conveying belt 15.

[0027] A partition plate 16 is fixedly connected to the bottom of the inner wall of the protective shell 1, a first slide groove 17 is vertically opened on the inner wall of the protective shell 1, a second slide groove 18 is vertically opened on the inner wall of the first slide groove 17, a blocking plate 19 is slidably connected in the first slide groove 17, a first limit strip 110 is slidably connected in the second slide groove 18, and the blocking plate 19 is fixedly connected to the first limit strip 110.

[0028] It should be noted that the partition plate 16 divides the inner space of the protective housing 1 into a first accommodating space and a second accommodating space.

[0029] A third slide groove 111 is vertically opened on one side of the inner wall of the protective shell 1, a fourth slide groove 112 is vertically opened on one side of the partition plate 16, a first limiting groove 113 is vertically opened on one side of the protective shell 1, a accommodating hole 114 is horizontally opened on the protective shell 1, a first connecting hole 115 is vertically opened at the bottom of the inner wall of the first limiting groove 113, the bottom end of the first connecting hole 115 is connected to the internal space of the protective shell 1, and two fixed pulleys 116 are fixedly connected to the bottom of the inner wall of the protective shell 1.

[0030] A limit plate 215 and an adjusting plate 216 are provided on both sides of the grinding roller 211. The limit plate 215 and the adjusting plate 216 are both located in the accommodating hole 114. The limit plate 215 is connected to the rotating shaft 214 through a bearing. One side of the limit plate 215 is in contact with the grinding roller 211. The other side of the limit plate 215 is fixedly connected to a limit rod 217. The limit rod 217 is connected to the limit block 218 through a torsion spring. A plurality of limit grooves 219 are horizontally provided on the limit plate 215.

[0031] The adjusting disk 216 is fixedly connected to the rotating shaft 214, and a ratchet 2110 is fixedly connected to one side of the adjusting disk 216, and the ratchet 2110 is engaged with the limit block 218. A plurality of adjusting grooves 2111 are horizontally provided on the adjusting disk 216, and the adjusting grooves 2111 are connected to the limit slide groove 219. An adjusting rod 2112 is horizontally penetrated on the grinding strip 213, and the adjusting rod 2112 is fixedly connected to the grinding strip 213. Both ends of the adjusting rod 2112 extend to the adjusting grooves 2111 provided on the symmetrically arranged adjusting disk 216, and an electromagnet 2113 is embedded on the grinding roller 211.

[0032] The transmission assembly 22 includes a stepper motor 221, a transmission gear 222 is fixedly connected to the output end of the stepper motor 221, the output end of the stepper motor 221 is fixedly connected to the rotating shaft 214, a limiting frame 223 is fixedly connected to the stepper motor 221, and the connecting assembly 31 includes a rack 311 meshing with the transmission gear 222, a limiting slider 312 is fixedly connected to one side of the rack 311, the limiting slider 312 is slidably connected in the first limiting groove 113, a first elastic member 313 is fixedly connected to the top of the limiting slider 312, one end of the first elastic member 313 is fixedly connected to the inner wall of the first limiting groove 113, and a synchronization rope 314 is fixedly connected to the bottom of the limiting slider 312.

[0033] It should be noted that: Fig. 9 As shown, the transmission gear 222 is an incomplete gear.

[0034] The screening assembly 32 includes a first slider 321 and a second slider 322 which are respectively slidably connected to the third slide groove 111 and the fourth slide groove 112, a first filter screen 323 is arranged between the first slider 321 and the second slider 322, one end of the synchronization rope 314 passes through the fixed pulley 116 and is fixedly connected to the bottom of the first filter screen 323, one end of the first filter screen 323 is fixedly connected to the first slider 321, the other end of the first filter screen 323 is fixedly connected to the first slider 321, a second filter screen 324 is arranged on one side of the first filter screen 323, one end of the second filter screen 324 is fixedly connected to the partition plate 16, the other end of the second filter screen 324 is fixedly connected to the inner wall of the protective shell 1, the bottom of the first slider 321 and the second slider 322 are both fixedly connected to the second elastic member 325, one end of the second elastic member 325 is fixedly connected to the bottom of the inner wall of the protective shell 1, the top of the first slider 321 is fixedly connected to the limiting column 326, and the limiting column 326 is fixedly connected to the blocking plate 19.

[0035] It should be noted that the first filter screen 323 is located in the first accommodation space, and the second filter screen 324 is located in the second accommodation space.

[0036] The cleaning unit 4 includes a second limiting strip 41 fixed on the inner wall of the protective shell 1, and a second limiting groove 42 is horizontally opened on the second limiting strip 41. A scraper 43 is slidably connected in the second limiting groove 42. One end of the scraper 43 extends out of the second limiting groove 42, and one end of the scraper 43 extending out of the second limiting groove 42 is in contact with the outer wall of the grinding roller 211. One end of the scraper 43 located in the second limiting groove 42 is fixedly connected to a plurality of third elastic members 44, and one end of the plurality of third elastic members 44 are all fixedly connected to the inner wall of the second limiting groove 42.

[0037] Embodiment 1: Figure 1 - Fig.12 As shown, in this embodiment, when the coal block needs to be ground and crushed, the stepper motor 221 in the transmission assembly 22 is first started, so that the stepper motor 221 drives the rotating shaft 214 to rotate counterclockwise. Since the grinding roller 211 is fixedly connected to the rotating shaft 214, the adjusting disk 216 is fixedly connected to the rotating shaft 214, and the limiting disk 215 is connected to the rotating shaft 214 through a bearing, the rotating shaft 214 drives the adjusting disk 216 and the grinding roller 211 to rotate counterclockwise. When the adjusting disk 216 rotates counterclockwise, the adjusting disk 216 drives the ratchet 2110 to rotate counterclockwise. Because the limiting block 218 is engaged with the ratchet 2110 and the limiting block 218 is connected to the limiting rod 217 through a torsion spring, the ratchet 2110 rotates counterclockwise. When rotating counterclockwise, the limiting block 218 is continuously reset after the limiting rod 217 is twisted.

[0038] When the adjusting disk 216 rotates counterclockwise, under the action of the limiting slide groove 219 and the adjusting groove 2111, the adjusting rod 2112 moves gradually toward the outer circumference of the limiting disk 215 and the adjusting disk 216 along the limiting slide groove 219 and the adjusting groove 2111, thereby driving the grinding bar 213 to gradually extend out of the accommodating groove 212, thereby reducing the distance between the grinding bar 213 and the pressing block, thereby improving the grinding intensity, so that the device can adjust the corresponding grinding intensity according to the hardness of the coal block.

[0039] The coal block is made to slide along the landslide 11 to between the grinding roller 211 and the pressing block, the stepper motor 221 is started, the electromagnet 2113 is energized, and the atomizer 14 is started at the same time, so that the stepper motor 221 drives the rotating shaft 214 and the transmission gear 222 to rotate clockwise, and the rotating shaft 214 drives the grinding roller 211 and the grinding bar 213 to rotate, thereby grinding and crushing the coal block, and the ground coal block falls to the top of the first filter 323.

[0040] During the coal block crushing process, the electromagnet 2113 generates a magnetic field after being energized, thereby attracting the iron impurities in the coal block, causing the iron impurities to be adsorbed on the surface of the grinding roller 211 and the grinding bar 213, thereby separating the iron impurities from the coal block, improving the coal block accuracy, reducing the difficulty of subsequent washing and reducing the washing cost.

[0041] It should be noted that the sulfides in the coal blocks are weakly magnetic and may be adsorbed on the surface of the grinding roller 211 and the grinding bar 213 under the attraction of the electromagnet 2113. Although it cannot be completely removed, it can effectively reduce the sulfide content in the ground and crushed coal blocks, further reducing the difficulty and cost of subsequent washing.

[0042] During the rotation of the grinding roller 211 and the grinding strip 213, under the action of the third elastic member 44, one end of the scraper 43 is always in contact with the surface of the grinding roller 211 and the grinding strip 213, thereby scraping off the iron impurities and sulfides adsorbed on the surface of the grinding roller 211 and the grinding strip 213 and dropping them onto the second filter 324.

[0043] After the atomizer 14 is started, the water in the water conveying belt 15 is atomized and enters the protective shell 1 through the water inlet 13 to absorb the dust generated when the grinding roller 211 and the grinding bar 213 grind and crush the coal blocks, thereby reducing the dust content in the air and reducing the pollution to the working environment.

[0044] As the atomized water droplets gradually descend, the water droplets come into contact with the coal on the top of the first filter 323 and the iron impurities and sulfides on the second filter 324. As the water droplets continue to enter the protective shell 1, the water droplets clean the coal, iron impurities and sulfides, and clean the soil, dust and coal slime carried by the coal, iron impurities and sulfides, and then fall into the first space and the second space, thereby further removing impurities contained in the coal blocks while collecting coal slime and water resources to avoid waste of resources.

[0045] When the stepping motor 221 drives the transmission gear 222 to rotate, since the transmission gear 222 is an incomplete gear, the transmission gear 222 is constantly meshed with and then separated from the rack 311 during the rotation process.

[0046] When the transmission gear 222 is meshed with the rack 311, the transmission gear 222 drives the rack 311 and the limiting slider 312 to rise along the first limiting groove 113, so that the limiting slider 312 squeezes the first elastic member 313, and the limiting slider 312 pulls the first filter screen 323 down through the synchronization rope 314, so that the first slider 321 and the second slider 322 squeeze the second elastic member 325.

[0047] It should be noted that when the first slider 321 and the second slider 322 squeeze the second elastic member 325, the first slider 321 pulls the blocking plate 19 and the first limiting bar 110 down along the second slide groove 18 through the limiting column 326, thereby closing the discharge port 12 on one side of the protective shell 1 to prevent coal blocks from falling out of the protective shell 1.

[0048] When the transmission gear 222 is separated from the rack 311 , the second elastic member 325 and the first elastic member 313 are released from stress, thereby driving the limiting slider 312 , the rack 311 , and the first filter 323 to reset.

[0049] The transmission gear 222 is continuously engaged and separated with the rack 311, thereby continuously driving the first filter screen 323 to periodically rise and fall along the third chute 111 and the fourth chute 112, thereby jigging the coal on the first filter screen 323, shaking off impurities such as coal slime and dust attached to the surface of the coal, and further reducing the difficulty of washing.

[0050] When the coal block is broken, first turn off the stepper motor 221, and the grinding roller 211 and the grinding bar 213 will continue to rotate for a period of time due to inertia, so that the scraper 43 can scrape off the iron impurities and sulfides adsorbed on the surface of the grinding roller 211 and the grinding bar 213 to prevent impurities from falling into the coal after jigging.

[0051] When the grinding roller 211 and the grinding bar 213 completely stop rotating, the limiting slider 312, the rack 311 and the first filter screen 323 are reset, so that the first slider 321 pushes the blocking plate 19 and the first limiting bar 110 to reset along the second slide groove 18 through the limiting column 326, thereby opening the discharge port 12 on one side of the protective shell 1, making it convenient for the operator to take the coal blocks out of the protective shell 1.

[0052] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A pre-treatment device in a coal washing device, comprising a protective shell (1) for carrying coal, a crushing unit (2) located in the protective shell (1) for crushing the coal, a separation unit (3) for separating impurities from the crushed coal, and a cleaning unit (4) for cleaning the crushing unit (2), characterized in that: The crushing unit (2) comprises a rolling assembly (21) that is adjusted according to the hardness of the coal and a transmission assembly (22) that drives the separation unit (3) to operate synchronously, and the rolling assembly (21) comprises a grinding roller (211) that rolls and crushes the coal; The grinding roller (211) is horizontally provided with a plurality of receiving grooves (212), each of the plurality of receiving grooves (212) being slidably connected with a grinding strip (213) whose length extending beyond the receiving groove (212) is adjusted according to the hardness of the coal, and a rotating shaft (214) is horizontally penetrated through the grinding roller (211) for driving the grinding roller (211) to rotate, and the rotating shaft (214) is fixedly connected to the grinding roller (211); The separation unit (3) comprises a connection component (31) that follows the transmission component (22) for operation, and a screening component (32) that performs screening on the crushed coal.

2. The pre-treatment device in the coal washing equipment according to claim 1 is characterized in that: The top of the protective shell (1) is fixedly connected to a landslide (11), both sides of the protective shell (1) are provided with discharge ports (12), both sides of the protective shell (1) are horizontally symmetrically provided with water inlet holes (13), an atomizer (14) is arranged in the water inlet hole (13), one end of the atomizer (14) extends out of the water inlet hole (13), one side of the atomizer (14) is provided with a water conveying belt (15), one end of the atomizer (14) extends into the water conveying belt (15), and the atomizer (14) is fixedly connected to the water conveying belt (15).

3. The pre-treatment device in the coal washing equipment according to claim 1 is characterized in that: A partition plate (16) is fixedly connected to the bottom of the inner wall of the protective shell (1); a first slide groove (17) is vertically opened on the inner wall of the protective shell (1); a second slide groove (18) is vertically opened on the inner wall of the first slide groove (17); a blocking plate (19) is slidably connected in the first slide groove (17); a first limit strip (110) is slidably connected in the second slide groove (18); and the blocking plate (19) is fixedly connected to the first limit strip (110).

4. A pre-treatment device in a coal washing equipment according to claim 3, characterized in that: A third slide groove (111) is vertically provided on one side of the inner wall of the protective shell (1), a fourth slide groove (112) is vertically provided on one side of the partition plate (16), a first limit groove (113) is vertically provided on one side of the protective shell (1), a receiving hole (114) is horizontally provided on the protective shell (1), a first connecting hole (115) is vertically provided on the bottom of the inner wall of the first limit groove (113), the bottom end of the first connecting hole (115) is communicated with the internal space of the protective shell (1), and two fixed pulleys (116) are fixedly connected to the bottom of the inner wall of the protective shell (1).

5. The pre-treatment device in the coal washing equipment according to claim 4, characterized in that: A limit plate (215) and an adjustment plate (216) are provided on both sides of the grinding roller (211); the limit plate (215) and the adjustment plate (216) are both located in the receiving hole (114); the limit plate (215) is connected to the rotating shaft (214) via a bearing; one side of the limit plate (215) is in contact with the grinding roller (211); the other side of the limit plate (215) is fixedly connected to a limit rod (217); the limit rod (217) is connected to a limit block (218) via a torsion spring; and a plurality of limit sliding grooves (219) are horizontally provided on the limit plate (215).

6. The pre-treatment device in the coal washing equipment according to claim 5, characterized in that: The adjusting disk (216) is fixedly connected to the rotating shaft (214); a ratchet (2110) is fixedly connected to one side of the adjusting disk (216); the ratchet (2110) is meshed with a limit block (218); a plurality of adjusting grooves (2111) are horizontally provided on the adjusting disk (216); the adjusting grooves (2111) are communicated with the limit slide grooves (219); an adjusting rod (2112) is horizontally provided through the grinding strip (213); the adjusting rod (2112) is fixedly connected to the grinding strip (213); two ends of the adjusting rod (2112) respectively extend into the adjusting grooves (2111) provided on the symmetrically arranged adjusting disk (216); and an electromagnet (2113) is embedded on the grinding roller (211).

7. A pre-treatment device in a coal washing equipment according to claim 6, characterized in that: The transmission assembly (22) comprises a stepper motor (221), a transmission gear (222) is fixedly connected to the output end of the stepper motor (221), the output end of the stepper motor (221) is fixedly connected to the rotating shaft (214), and a limiting frame (223) is fixedly connected to the stepper motor (221).

8. The pre-treatment device in the coal washing equipment according to claim 7, characterized in that: The connection assembly (31) comprises a rack (311) meshing with a transmission gear (222); one side of the rack (311) is fixedly connected to a limit slider (312); the limit slider (312) is slidably connected in a first limit slot (113); a first elastic member (313) is fixedly connected to the top of the limit slider (312); one end of the first elastic member (313) is fixedly connected to an inner wall of the first limit slot (113); and a synchronization rope (314) is fixedly connected to the bottom of the limit slider (312).

9. A pre-treatment device in a coal washing equipment according to claim 8, characterized in that: The screening assembly (32) comprises a first slider (321) and a second slider (322) which are respectively slidably connected to the third slide groove (111) and the fourth slide groove (112); a first filter screen (323) is arranged between the first slider (321) and the second slider (322); one end of the synchronization rope (314) passes through the fixed pulley (116) and is fixedly connected to the bottom of the first filter screen (323); one end of the first filter screen (323) is fixedly connected to the first slider (321); the other end of the first filter screen (323) is fixedly connected to the first slider (321); the first filter screen (323) is fixedly connected to the first slider (321); A second filter screen (324) is provided on one side of the net (323); one end of the second filter screen (324) is fixedly connected to the partition plate (16); the other end of the second filter screen (324) is fixedly connected to the inner wall of the protective shell (1); a second elastic member (325) is fixedly connected to the bottom of the first slider (321) and the second slider (322); one end of the second elastic member (325) is fixedly connected to the bottom of the inner wall of the protective shell (1); a limiting column (326) is fixedly connected to the top of the first slider (321); and the limiting column (326) is fixedly connected to the blocking plate (19).

10. The pre-treatment device in the coal washing equipment according to claim 1, characterized in that: The cleaning unit (4) comprises a second limiting strip (41) fixed on the inner wall of the protective shell (1), the second limiting strip (41) being horizontally provided with a second limiting groove (42), a scraper (43) being slidably connected in the second limiting groove (42), one end of the scraper (43) extending out of the second limiting groove (42), one end of the scraper (43) extending out of the second limiting groove (42) being in contact with the outer wall of the grinding roller (211), one end of the scraper (43) located in the second limiting groove (42) being fixedly connected to a plurality of third elastic members (44), one end of each of the plurality of third elastic members (44) being fixedly connected to the inner wall of the second limiting groove (42).

Images