A device for removing impurities and preventing blockage of raw coal

Abstract

The present application relates to the technical field of raw coal impurity removal, and specifically provides a raw coal impurity removal anti-blocking device. The present application sets a feeding initial screening mechanism, filters coal powder by using a flow guide plate, sets a first-stage material uniformizer and a second-stage material uniformizer, can uniformly disperse coal material, prevents coal material from being accumulated and causing the device to be blocked, adds a belt type iron removal mechanism, uses the magnetism of an electromagnet to adsorb metal impurities in raw coal, ensures the discharging quality of coal material, adds a grate type screening unit, enables small coal blocks to smoothly pass through the gap between swing rods and fall into the lower bin, and temporarily retains large stone blocks and other impurities on the swing rods, waits for subsequent spin-throwing treatment by a spin roller hook and jaw type screening unit, and sets the spin roller hook and jaw type screening unit, uses a first speed reducer and a cam divider to provide power, intermittently drives the hook and jaw to rotate, and can throw large impurities into an impurity recovery box.

Description

Technical Field

[0001] This invention relates to the field of raw coal impurity removal technology, and more specifically to a raw coal impurity removal anti-blocking device. Background Technology

[0002] Coal impurity removal equipment is a key piece of equipment used in coal mining to remove impurities (such as stones, mud, and metals) from coal, ensuring coal quality and improving the efficiency of downstream processes. However, in practical applications, coal mine impurity removal equipment often faces blockage problems. Frequent blockages not only affect the operating efficiency of the equipment but may also lead to equipment damage and production stoppages.

[0003] Blockage in raw coal impurity removal devices is usually caused by the accumulation of impurities, overload, or incomplete separation during operation. For example, wet coal, mud, and other sticky impurities easily adhere to the screen or conveyor belt, leading to screen blockage or conveyor belt jamming as the accumulation increases. Alternatively, when there are large differences in material particle size, incomplete screening can easily occur, and large pieces of impurities can easily get stuck in the screen holes or outlet of the device, hindering the normal flow of materials. At the same time, when the amount of coal and impurities conveyed exceeds the processing capacity of the device, the material may not be able to pass through the screening or separation system in time, thus accumulating and causing blockage.

[0004] Therefore, this invention proposes a raw coal impurity removal and anti-blocking device. Summary of the Invention

[0005] The purpose of this invention is to provide a raw coal impurity removal and anti-clogging device, which can screen out impurities present in raw coal and effectively reduce the occurrence of device clogging.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A raw coal impurity removal and anti-blocking device includes a frame, a primary screening mechanism for feeding, a raw coal conveying mechanism, a belt-type iron removal mechanism, an impurity removal mechanism, and a strip-type impurity discharge mechanism;

[0008] The feeding screening mechanism is located at the front end of the frame and is used to perform preliminary screening and uniform distribution of the input material.

[0009] The front end of the raw coal conveying mechanism is located below the discharge port of the primary screening mechanism.

[0010] The belt-type iron removal mechanism is located above the raw coal conveying mechanism and is used to remove iron impurities mixed in the raw coal conveyed on the surface of the raw coal conveying mechanism.

[0011] The impurity removal mechanism includes a base, a grate-type screening unit, a rotary roller hook-claw screening unit, and a hook cleaning unit;

[0012] The base has a first opening in the middle, and the grate screening unit and the rotary roller hook-claw screening unit are both located at the first opening. The rotary roller hook-claw screening unit is located in the middle of the base, and the grate screening unit is located in front of the rotary roller hook-claw screening unit.

[0013] The grate screening unit is located behind the raw coal conveying mechanism and is connected to the raw coal conveying mechanism;

[0014] The base is provided with a mounting bracket on the top, and the mounting bracket is provided with a second opening on the top. A cleaning unit is provided inside the second opening. The cleaning unit is located above and behind the rotary roller hook-claw screening unit and is used to clean the rotary roller hook-claw screening unit.

[0015] The strip-type waste removal mechanism is located below and behind the first opening;

[0016] The strip-type waste discharge mechanism is arranged in the front-to-back direction, and a waste collection box is provided on the lower rear side of the strip-type waste discharge mechanism.

[0017] Preferably, the feeding primary screening mechanism includes a feeding funnel, a first-stage uniform feeder, and a second-stage uniform feeder;

[0018] A first-stage uniform feeder is provided above the feed inlet of the feed funnel. The first-stage uniform feeder includes a connecting shaft and swing hooks. The connecting shaft is horizontally positioned above the feed funnel, and multiple swing hooks are provided, which are equally spaced on the connecting shaft. An inclined guide plate is provided inside the feed funnel, and multiple screening grooves are formed on the guide plate.

[0019] The discharge port of the feed funnel is equipped with a second-stage uniform feeder, which has the same structure as the first-stage uniform feeder.

[0020] Preferably, the raw coal conveying mechanism includes a first-stage conveyor belt, which is located obliquely below the discharge port of the feed hopper.

[0021] Preferably, the belt-type iron removal mechanism includes a second-stage transmission belt and an electromagnet, wherein the second-stage transmission belt is located above the first-stage transmission belt, and the transmission direction of the second-stage transmission belt is perpendicular to the transmission direction of the first-stage transmission belt, and the electromagnet is located between the layers of the second-stage transmission belt.

[0022] Preferably, the grate screening unit includes a hydraulic cylinder, a first square tube, a drive block, a stop block, and a swing rod;

[0023] The first square tube is arranged horizontally, and each end of the first square tube is equipped with a rotating shaft. Each rotating shaft is connected to a first bearing seat through a bearing. The first bearing seat is connected to the base.

[0024] There are two drive blocks, and each drive block is connected to one end of the first square tube.

[0025] There are two hydraulic cylinders, both mounted on the base, and the output shaft of each hydraulic cylinder is connected to a drive block. The first square tube is also provided with multiple swing rods arranged at equal intervals, and the multiple swing rods are arranged parallel to each other.

[0026] The first square tube is also provided with multiple stops, with one stop on each side of the end of each swing rod.

[0027] Preferably, the feeding primary screening mechanism includes a feeding funnel, a first-stage uniform feeder, and a second-stage uniform feeder;

[0028] A first-stage uniform feeder is provided above the feed inlet of the feed funnel. The first-stage uniform feeder includes a connecting shaft and swing hooks. The connecting shaft is horizontally positioned above the feed funnel, and multiple swing hooks are provided, which are equally spaced on the connecting shaft. An inclined guide plate is provided inside the feed funnel, and multiple screening grooves are formed on the guide plate.

[0029] The discharge port of the feed funnel is equipped with a second-stage uniform feeder, which has the same structure as the first-stage uniform feeder.

[0030] Preferably, the rotary roller hook-claw screening unit includes a first roller shaft and hooks, and both ends of the first roller shaft are connected to a second bearing seat through bearings, and the second bearing seat is disposed on the base.

[0031] Multiple sets of hooks are provided on the first roller shaft; each set consists of three hooks, wherein the three hooks in the same set are on the same plane, and the angle between the hooks in the same set is 120°; the individual hooks in each set correspond one-to-one in position, forming three rows of hook sets arranged along the axial direction of the first roller shaft.

[0032] The rotary roller hook-claw screening unit is equipped with an intermittent transmission unit, which can be used to drive the roller shaft to rotate intermittently.

[0033] Preferably, the intermittent transmission unit includes a first geared motor and a cam divider;

[0034] The first geared motor is mounted on the base and is connected to the cam divider, which is connected to the first roller shaft.

[0035] Preferably, the cleaning unit includes a single-rotary scraper assembly;

[0036] The single-rotary scraper assembly includes a rotating shaft and a first cleaning scraper; the rotating shaft is horizontally arranged, and both ends of the rotating shaft are connected to a third bearing seat through bearings, and the third bearing seat is arranged on a mounting bracket;

[0037] There are multiple first cleaning scrapers, which are evenly arranged on the rotating shaft along the axial direction of the shaft.

[0038] Preferably, the cleaning unit further includes a linkage scraper assembly;

[0039] The linkage scraper assembly includes a cylinder, a slide rail, a slider, a hydraulic cylinder, a second square tube, and a second cleaning scraper;

[0040] The mounting bracket is equipped with cylinders and slide rails on both sides of the top. The slider is mounted on the slide rail. The piston end of the cylinder is connected to the slider. The top of the slider is fixedly connected to a fourth bearing seat.

[0041] The second square tube is horizontally arranged, and a drive shaft is installed at both ends of the second square tube. Each drive shaft is connected to a fourth bearing seat through a bearing.

[0042] Multiple second cleaning scrapers are fixedly connected to the second square tube along its length.

[0043] The hydraulic cylinder is mounted on a mounting bracket, and the output shaft of the hydraulic cylinder is connected to a second square tube.

[0044] Preferably, the strip-type impurity removal mechanism includes a second reduction motor, a second roller shaft, and a strip;

[0045] The output shaft of the second geared motor is connected to the end of the second roller shaft, and multiple strips arranged at equal intervals are provided on the second roller shaft.

[0046] The beneficial technical effects of this invention are:

[0047] This invention proposes a raw coal impurity removal and anti-clogging device. By setting up a primary screening mechanism at the feed inlet, small coal particles are filtered out using screening grooves on the guide plate. Simultaneously, by installing a first-stage uniform distributor at the feed inlet of the feed hopper and a second-stage uniform distributor at the discharge outlet, the coal is fully and evenly dispersed, preventing coal lumps from accumulating and causing blockages. A belt-type iron removal mechanism is added, using the magnetism of an electromagnet to adsorb metallic impurities in the raw coal, ensuring the quality of the discharged coal. A grate-type screening unit is added, allowing smaller coal lumps to pass smoothly through the gaps between the swing arms and fall into the lower hopper. Larger stones and other debris are temporarily trapped on the swing arm, awaiting subsequent hook-and-claw screening by the rotary roller and hook-and-claw unit for swirling and throwing. A hydraulic cylinder drives the swing arm to swing at a certain amplitude, preventing coal or debris from getting stuck in the gaps and providing favorable conditions for the subsequent throwing process. The rotary roller and hook-and-claw screening unit, powered by a first reduction motor and cam divider, intermittently rotates the hooks, throwing large debris trapped on the swing arm into a debris collection box. A strip-type debris removal mechanism transports some debris to the collection box for further processing. This invention, through optimized structural design, effectively removes debris from raw coal while reducing the probability of blockages, improving coal mine production efficiency and ensuring coal quality. The raw coal impurity removal and anti-blockage device provided by this invention is highly automated, eliminating the need for manual removal operations, ensuring worker safety, and improving removal efficiency, meeting the requirements of modern industry. Attached Figure Description

[0048] Figure 1 The three-dimensional structure of the raw coal impurity removal and anti-clogging device of the present invention Figure 1 ;

[0049] Figure 2 The three-dimensional structure of the raw coal impurity removal and anti-clogging device of the present invention Figure 2 ;

[0050] Figure 3 This is a front view of the raw coal impurity removal and anti-clogging device of the present invention;

[0051] Figure 4 This is an assembly diagram of the feeding primary screening mechanism and the belt-type iron removal mechanism in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of the feeding primary screening mechanism in an embodiment of the present invention;

[0053] Figure 6 This is a schematic diagram of the belt-type iron removal mechanism in an embodiment of the present invention. Figure 1 ;

[0054] Figure 7 This is a schematic diagram of the belt-type iron removal mechanism in an embodiment of the present invention. Figure 2 ;

[0055] Figure 8 This is an assembly diagram of the grate screening unit, the strip-type impurity discharge mechanism, and the impurity recycling box in an embodiment of the present invention;

[0056] Figure 9 This is an assembly diagram of the grate screening unit, the rotary roller hook-claw screening unit, and the hook cleaning unit according to an embodiment of the present invention. Figure 1 ;

[0057] Figure 10 This is an assembly diagram of the grate screening unit, the rotary roller hook-claw screening unit, and the hook cleaning unit according to an embodiment of the present invention. Figure 2 ;

[0058] Figure 11 This is an assembly diagram of the grate screening unit and the rotary roller hook-claw screening unit in an embodiment of the present invention. Figure 1 ;

[0059] Figure 12 This is an assembly diagram of the grate screening unit and the rotary roller hook-claw screening unit in an embodiment of the present invention. Figure 2 ;

[0060] Figure 13 This is a schematic diagram of the structure of the grate screening unit in an embodiment of the present invention;

[0061] Figure 14 This is a schematic diagram of the structure of the rotary roller hook-claw screening unit in an embodiment of the present invention;

[0062] Figure 15 This is a schematic diagram of the assembly of the rotary roller hook-claw screening unit and the hook cleaning unit in an embodiment of the present invention.

[0063] Figure 16 This is a schematic diagram of the single-rotary scraper assembly in the hook-cleaning unit of this invention.

[0064] Figure 17 This is a schematic diagram of the linkage scraper assembly in the hook cleaning unit of this invention.

[0065] Figure 18 This is a schematic diagram of the strip-type impurity removal mechanism in an embodiment of the present invention;

[0066] Where a-rack, b-base, c-mounting bracket;

[0067] 1-Initial feeding screening mechanism: 11-Feeding funnel, 111-Guide plate, 12-First stage uniform feeder: 121-Connecting shaft, 122-Swing hook, 123-Synchronous shaft; 13-Second stage uniform feeder;

[0068] Raw coal conveying mechanism: 21 - First-stage conveyor belt;

[0069] 2-Belt-type iron removal mechanism: 221-Second-stage transmission belt, 222-Electromagnet;

[0070] Cleaning mechanism:

[0071] 3-Grate screening unit: 31-First square tube, 32-First bearing seat, 33-Drive block, 34-Swing rod, 35-Block;

[0072] 4-Rotating roller hook-claw type screening unit: 41-First reduction motor, 42-Cam divider, 43-First roller shaft, 44-Second bearing seat, 45-Hook, 46-Spacer sleeve;

[0073] 5-Hook cleaning unit:

[0074] Single-rotary scraper assembly: 511-rotating shaft, 512-third bearing housing, 513-first cleaning scraper;

[0075] Linkage scraper assembly: 521-slide rail, 522-slider, 523-fourth bearing seat, 524-second square tube, 525-second cleaning scraper;

[0076] 6-Strip-type impurity removal mechanism: 61-Second roller, 62-Strip;

[0077] 7-Miscellaneous waste recycling bin. Detailed Implementation

[0078] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. Certain embodiments of the invention will be described more fully below with reference to the accompanying drawings, and some, but not all, of these embodiments will be shown. In fact, various embodiments of the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the invention to meet applicable legal requirements.

[0079] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0080] In this embodiment of the invention, a raw coal impurity removal and anti-clogging device is provided. Please refer to [reference needed]. Figures 1 to 18 As shown, this raw coal impurity removal and anti-clogging device can screen out metallic or large impurities in raw coal, while effectively reducing the probability of clogging, thus ensuring normal coal mining operations and improving coal mine production efficiency. The device mainly includes a frame (a), a primary feeding screening mechanism (1), a belt-type iron removal mechanism (2), an impurity removal mechanism (a grate-type screening unit (3), a rotary roller hook-claw screening unit (4), and a hook cleaning unit (5)), a strip-type impurity discharge mechanism (6), and an impurity recovery box (7). The frame (a) supports all the mechanisms, providing a stable and secure assembly environment for them.

[0081] Combination Figures 1 to 3 As shown, the primary screening mechanism 1 is located at the front end of the frame a and is used to perform preliminary screening and uniformization of the input material. The primary screening mechanism 1 includes structural components such as a feeding funnel 11, a first-stage uniformizer 12, and a second-stage uniformizer 13.

[0082] Combination Figure 4 and Figure 5 As shown, a first-stage uniform feeder 12 is installed above the feed inlet of the feed hopper 11. The first-stage uniform feeder 12 includes a connecting shaft 121 and a swing hook 122. The connecting shaft 121 is horizontally positioned above the feed hopper 11. Multiple swing hooks 122 are provided and are evenly spaced on the connecting shaft 121. Before the raw coal enters the feed hopper 11, the raw coal comes into contact with the swing hooks 122, which can evenly disperse the raw material and prevent the raw coal from accumulating in large quantities and causing blockage of the feed hopper 11, thus avoiding affecting the subsequent operation of the device.

[0083] Combination Figure 5 As shown, the feed hopper 11 has an inclined guide plate 111 inside, with multiple screening grooves on the guide plate 111. When raw coal enters the feed hopper 11, smaller coal particles can pass through the screening grooves on the guide plate 111 into the lower hopper, reducing the accumulation of coal particles and thus reducing the probability of clogging in the screen holes and other small gaps in the subsequent screen.

[0084] Combination Figure 3 and Figure 4 As shown, a second-stage uniform feeder 13 is installed at the outlet of the feed hopper 11. The second-stage uniform feeder 13 has the same structure and arrangement as the first-stage uniform feeder 12, and will not be described in detail here. By installing the second-stage feeder 13 at the outlet of the feed hopper 11, the coal can be evenly dispersed again, so that the raw coal can fall evenly onto the first-stage conveyor belt 21, preventing the first-stage conveyor belt 21 from jamming due to the large accumulation of raw coal. At the same time, the coal blocks on the first-stage conveyor belt 21 are laid out in a flat state, which also facilitates the smooth progress of the subsequent iron removal process.

[0085] Combination Figure 3 As shown, the front end of the raw coal conveying mechanism is located below the discharge port of the primary screening mechanism 1. The raw coal conveying mechanism includes a first-stage conveyor belt 21, one end of which is located below the discharge port of the feed hopper 11.

[0086] Combination Figure 3 As shown, the belt-type iron removal mechanism 2 is located above the raw coal conveying mechanism and is used to remove metal impurities such as anchor rods, metal mesh, and steel reinforcement ladders from the raw coal conveyed on the surface of the first-stage conveyor belt 21, so as to fully ensure the quality of the coal.

[0087] Combination Figure 4 , Figure 6 and Figure 7 As shown, the belt-type iron removal mechanism 2 includes a second-stage transmission belt 221 and an electromagnet 222, etc. The second-stage transmission belt 221 is located above the first-stage transmission belt 21, and the transmission direction of the second-stage transmission belt 221 is perpendicular to the transmission direction of the first-stage transmission belt 21. The electromagnet 222 is located between the layers of the second-stage transmission belt 221.

[0088] After being excited by the electromagnet 222, it can attract metal materials such as anchor rods and metal mesh in the raw coal to the second-stage transmission belt 221, and rely on the inertia of the second-stage transmission belt 221 to throw the metal materials into the scrap iron collection boxes set on both sides of the second-stage transmission belt 221.

[0089] Combination Figure 9 and Figure 10 As shown, the impurity removal mechanism includes a base b, a grate-type screening unit 3, a rotary roller hook-claw screening unit 4, and a cleaning hook unit 5. The base b has a first opening in the middle, and both the grate-type screening unit 3 and the rotary roller hook-claw screening unit 4 are located at the first opening. The rotary roller hook-claw screening unit 4 is located in the middle of the base b, and the grate-type screening unit 3 is located in front of the rotary roller hook-claw screening unit 4.

[0090] Combination Figure 8As shown, the grate screening unit 3 is located behind the raw coal conveying mechanism and is connected to the raw coal conveying mechanism. The grate screening unit 3 includes a hydraulic cylinder, a first square tube 31, a first bearing seat 32, a drive block 33, a swing rod 34, and a stop block 35.

[0091] Combination Figure 13 As shown, the first square tube 31 is horizontally arranged, with rotating shafts at both ends. Each rotating shaft is connected to a first bearing seat 32 via a bearing, and the first bearing seat 32 is connected to the base b. There are two drive blocks 33, each connected to one end of the first square tube 31. There are two hydraulic cylinders (not shown in the figure), both mounted on the base b. The output shaft of each hydraulic cylinder is connected to a drive block 33, providing power to rotate the drive block 33, which in turn rotates the first square tube 31. Multiple parallel swing rods 34 are also mounted on the first square tube 31, spaced evenly. Smaller coal pieces can fall through the gaps between adjacent swing rods 34. A hopper is located directly below each swing rod 34, capable of holding smaller coal pieces. Larger debris is temporarily trapped on the swing rods 34, awaiting removal by the subsequent rotary roller and claw screening unit 4.

[0092] In addition, when coal or debris gets stuck in the gap of the swing rod 34 due to impact or its own gravity, the first square tube 31 is rotated by the hydraulic cylinder. The swing rod 34 on the first square tube 31 will also rotate. The swing amplitude and frequency can be controlled and adjusted by the hydraulic cylinder, so that the coal can be separated from the swing rod 34, ensuring the smooth progress of the subsequent spinning and throwing process.

[0093] Combination Figure 13 As shown, the first square tube 31 is also equipped with multiple stops 35. Each swing rod 34 has a stop 35 on both sides of its end. The stops 35 prevent debris from rolling back to the position between the base b and the first-stage transmission belt 21 when the swing rod 34 is raised, thus preventing wear on the transmission belt and damage to the equipment. Simultaneously, the outer contour of the stop 35 is semi-circular. When coal blocks roll freely from the first-stage transmission belt 21, the arc of the stop 35 is tangent to the direction of the coal block's fall, allowing the coal blocks or debris to land more smoothly on the swing rod 34.

[0094] Combination Figure 11 and Figure 12 As shown, a rotary roller hook-claw screening unit 4 is set in the middle position of the base b. The rotary roller hook-claw screening unit 4 mainly includes a first roller shaft 43, a second bearing seat 44, hooks 45 and spacer sleeves 46.

[0095] In addition, the rotary roller hook-claw screening unit 4 is also equipped with an intermittent transmission unit for driving the rotary roller hook-claw screening unit 4 to rotate. The intermittent transmission unit includes a geared motor 41 and a cam divider 42.

[0096] Combination Figure 14 As shown, the geared motor 41 is mounted on the base b and is connected to the cam divider 42. The cam divider 42 is connected to the first roller shaft 43 and is used to drive the first roller shaft 43 to achieve intermittent rotation. Both ends of the first roller shaft 43 are connected to second bearing seats 44 via bearings, and the second bearing seats 44 are mounted on the base b.

[0097] Combination Figure 14 As shown, the first roller shaft 43 is provided with multiple sets of hooks 45, wherein every three hooks 45 form a group, the three hooks 45 in the same group are on the same plane, and the interval angle between the hooks 45 in the same group is 120°. A spacer sleeve 46 is provided between two adjacent groups of hooks 45 to effectively separate the hooks 45. The individual hooks 45 in each group correspond one-to-one in position, forming three rows of hook groups arranged along the axial direction of the first roller shaft 43.

[0098] Combination Figure 11 and Figure 12 As shown, the swing rod 34 and the hook 45 are arranged at intervals. When the hook 45 rotates, it will not interfere with the swing rod 34, ensuring the smooth progress of the spinning and throwing process.

[0099] When a large object is caught on the swing arm 34, the first reduction motor 41 is turned on to provide power, and the first roller 43 is rotated intermittently through the cam divider 42. This allows the hooks 45 on the first roller 43 to complete one rotation and throw of the large object every 120°. That is, with each rotation, a row of hooks 45 simultaneously hooks up the object above the swing arm 34 and performs the rotation and throwing process to remove the impurities. This also prevents the object from being thrown out by the hooks 45 before it has completely settled. The entire rotation and throwing process is more controllable.

[0100] Combination Figure 9 and Figure 10 As shown, a mounting frame c is installed on the top of the base b. The top of the mounting frame c has a second opening, and a cleaning unit 5 is installed inside the second opening. The cleaning unit 5 is located above and behind the rotary roller hook-claw screening unit 4, and it can clean the hooks 45 of the rotary roller hook-claw screening unit 4, preventing ropes and other entanglements from affecting the rotary throwing and impurity removal operation of the hooks 45, thereby ensuring normal coal transportation and production. The cleaning unit 5 mainly includes a single-rotary scraper assembly and a linked scraper assembly.

[0101] Combination Figure 16As shown, the single-rotary scraper assembly includes structural components such as a rotating shaft 511, a third bearing seat 512, and a first cleaning scraper 513. The rotating shaft 511 is horizontally positioned, and both ends of the shaft are connected to the third bearing seat 512 via bearings. The bottom of the third bearing seat 512 is fixedly mounted on the mounting bracket c. Multiple first cleaning scrapers 513 are provided, evenly arranged along the axial direction of the rotating shaft 511. Each first cleaning scraper 513 is connected to the rotating shaft 511 via a bushing, and each first cleaning scraper 513 can freely swing to cut away debris, while simultaneously achieving inertial return due to its own gravity.

[0102] Combination Figure 17 As shown, the linkage scraper assembly includes structural components such as a cylinder, a slide rail 521, a slider 522, a hydraulic cylinder, a second square tube 524, and second cleaning scrapers 525. The mounting bracket c has cylinders and slide rails 521 on both sides of its top. The slider 522 is mounted on the slide rail 521, and the piston end of the cylinder is connected to the slider 522, allowing the cylinder to drive the slider 522 to move along the slide rail 521. A fourth bearing seat 523 is fixedly connected to the top of the slider 522. The second square tube 524 is horizontally positioned, with drive shafts mounted at both ends. Each drive shaft is connected to the fourth bearing seat 523 via bearings. Multiple second cleaning scrapers 525 are fixedly connected to the second square tube 524 along its length. The hydraulic cylinder is mounted on the mounting bracket c, and its output shaft is connected to one end of the second square tube 524, allowing the cylinder to rotate the second square tube 524. The second square tube 524 is driven to rotate by the hydraulic cylinder, and the second cleaning scraper 525 rotates with the second square tube 524. This allows the setting angle of the second cleaning scraper 525 to be adjusted so that sticky debris and ropes and other entangled objects on the hook 45 can be cleaned, ensuring the smooth progress of the throwing and cleaning process.

[0103] Combination Figure 15 As shown, the number of the first cleaning scraper 513 and the second cleaning scraper 525 is the same as the number of each row of hook claw groups and their positions correspond one-to-one. The first cleaning scraper 513 and the second cleaning scraper 525 are located between adjacent hook claw groups, which can complete the cutting and cleaning of sticky debris and ropes and other entangled objects on the hook claws 45, so as to maintain the normal operation of the rotary roller hook claw screening unit 4.

[0104] Combination Figure 16 and Figure 17As shown, the first cleaning scraper 513 and the second cleaning scraper 525 both have triangular scraper heads. When the hook 45 rotates, the scraper heads and the hook 45 move relative to each other. Because the first cleaning scraper 513 and the second cleaning scraper 525 are close to the hook 45, the scraper heads can cut the sticky and soft debris on the hook 45, thus enabling the hook 45 to operate normally to hook up and perform rotary polishing to remove impurities. The rotating shaft 511 of the single rotary scraper assembly is located above the stop position of the rotary roller hook 4 screening unit. The first cleaning scraper 513 arranged on the rotating shaft 511 swings freely along the rotating shaft 511 to cut soft debris. At the same time, it periodically cooperates with the linkage scraper assembly. The cylinder drives the second cleaning scraper 525 to move and hook and cut debris, realizing the function of periodically cleaning the soft debris on the hook 45.

[0105] Combination Figures 1 to 3 As shown, the strip-type waste discharge mechanism 6 is located below the rear side of the first opening, and the strip-type waste discharge mechanism 6 is arranged in the front-to-back direction.

[0106] Combination Figure 3 and Figure 18 As shown, the strip-type debris removal mechanism 6 includes structural components such as a second geared motor, a second roller shaft 61, and strips 62. The output shaft of the second geared motor is connected to the end of the second roller shaft 61, and multiple strips 62 arranged at equal intervals are mounted on the second roller shaft 61. Powered by the second geared motor, the second roller shaft 61 is rotated, and large debris such as stones on the strips 62 are transported to the debris collection box 7, while small coal pieces fall through the gaps between the strips 62 into the storage bin below.

[0107] Combination Figures 1 to 3 As shown, a waste recycling bin 7 is provided on the lower rear side of the strip-type waste discharge mechanism 6, which can be used to store large waste such as stones for subsequent unified recycling and processing.

[0108] Combination Figures 1 to 18As shown, this invention proposes a raw coal impurity removal and anti-clogging device. By setting up a primary screening mechanism 1, the screening grooves of the guide plate 111 filter out small-sized coal powder. Simultaneously, by setting a first-stage uniform feeder 12 at the feed inlet of the feed funnel 11 and a second-stage uniform feeder 13 at the discharge outlet, the coal material can be fully and evenly dispersed, preventing coal lumps from accumulating and causing blockages. By adding a belt-type iron removal mechanism 2, the magnetic properties of the electromagnet 222 adsorb metallic impurities in the raw coal, ensuring the quality of the discharged coal. By adding a grate-type screening unit 3, smaller coal lumps can smoothly pass through the gaps between the swing rods 34 and fall into the lower hopper. Larger stones and other debris are temporarily trapped on the swing arm 34, awaiting subsequent swirling and throwing by the rotary roller hook-claw screening unit 4. By setting a hydraulic cylinder to drive the swing arm 34 to swing at a certain amplitude, coal blocks can be prevented from getting stuck in the gap of the swing arm 34, while also providing favorable conditions for the subsequent throwing process. The rotary roller hook-claw screening unit 4 is also equipped with a first reduction motor 41 and a cam divider 42 to provide power, intermittently driving the hook 45 to rotate, which can throw the large debris trapped on the swing arm 34 into the debris collection box 7. At the same time, a strip-type debris discharge mechanism 6 is added to transport some debris to the debris collection box 7 for subsequent unified processing.

[0109] This invention, through optimized structural design, effectively removes impurities from raw coal while significantly reducing the probability of equipment blockage, thereby improving coal mine production efficiency and ensuring coal quality. The raw coal impurity removal and anti-blockage device provided by this invention boasts a high degree of automation, eliminating the need for manual impurity removal operations. This ensures the safety and health of workers while simultaneously improving removal efficiency, meeting the requirements of modern industrial development.

[0110] Of course, the specific embodiments described above further illustrate the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A raw coal impurity removal and anti-clogging device, characterized in that: It includes a frame, a primary screening mechanism for feeding, a raw coal conveying mechanism, a belt-type iron removal mechanism, a dirt removal mechanism, and a strip-type dirt discharge mechanism; The feeding screening mechanism is located at the front end of the frame and is used to perform preliminary screening and uniform distribution of the input material. The front end of the raw coal conveying mechanism is located below the discharge port of the primary screening mechanism. The belt-type iron removal mechanism is located above the raw coal conveying mechanism and is used to remove iron impurities mixed in the raw coal conveyed on the surface of the raw coal conveying mechanism. The impurity removal mechanism includes a base, a grate-type screening unit, a rotary roller hook-claw screening unit, and a hook cleaning unit; The base has a first opening in the middle, and the grate screening unit and the rotary roller hook-claw screening unit are both located at the first opening. The rotary roller hook-claw screening unit is located in the middle of the base, and the grate screening unit is located in front of the rotary roller hook-claw screening unit. The grate screening unit is located behind the raw coal conveying mechanism and is connected to the raw coal conveying mechanism; The base is provided with a mounting bracket on the top, and the mounting bracket is provided with a second opening on the top. A cleaning unit is provided inside the second opening. The cleaning unit is located above and behind the rotary roller hook-claw screening unit and is used to clean the rotary roller hook-claw screening unit. The grate screening unit includes a hydraulic cylinder, a first square tube, a drive block, a stop block, and a swing rod; The first square tube is arranged horizontally, and each end of the first square tube is equipped with a rotating shaft. Each rotating shaft is connected to a first bearing seat through a bearing. The first bearing seat is connected to the base. There are two drive blocks, and each drive block is connected to one end of the first square tube. There are two hydraulic cylinders, both mounted on the base, and the output shaft of each hydraulic cylinder is connected to a drive block. The first square tube is also provided with multiple swing rods arranged at equal intervals, and the multiple swing rods are arranged parallel to each other. The first square tube is also provided with multiple stops, wherein each swing rod has a stop on both sides of its end; The strip-type waste removal mechanism is located below and behind the first opening; The strip-type waste discharge mechanism is arranged in the front-to-back direction, and a waste collection box is provided on the lower rear side of the strip-type waste discharge mechanism.

2. The raw coal impurity removal and anti-blocking device according to claim 1, characterized in that: The feeding and screening mechanism includes a feeding hopper, a first-stage uniform feeder, and a second-stage uniform feeder. A first-stage uniform feeder is provided above the feed inlet of the feed funnel. The first-stage uniform feeder includes a connecting shaft and swing hooks. The connecting shaft is horizontally positioned above the feed funnel, and multiple swing hooks are provided, which are equally spaced on the connecting shaft. An inclined guide plate is provided inside the feed funnel, and multiple screening grooves are formed on the guide plate. The discharge port of the feed funnel is equipped with a second-stage uniform feeder, which has the same structure as the first-stage uniform feeder.

3. The raw coal impurity removal and anti-blocking device according to claim 1, characterized in that: The raw coal conveying mechanism includes a first-stage conveyor belt, which is located obliquely below the discharge port of the feed hopper.

4. The raw coal impurity removal and anti-blocking device according to claim 3, characterized in that: The belt-type iron removal mechanism includes a second-stage transmission belt and an electromagnet. The second-stage transmission belt is located above the first-stage transmission belt, and the transmission direction of the second-stage transmission belt is perpendicular to the transmission direction of the first-stage transmission belt. The electromagnet is located between the layers of the second-stage transmission belt.

5. The raw coal impurity removal and anti-blocking device according to claim 1, characterized in that: The rotary roller hook-claw screening unit includes a first roller shaft and hooks. Both ends of the first roller shaft are connected to a second bearing seat through bearings. The second bearing seat is disposed on the base. Multiple sets of hooks are provided on the first roller shaft; each set consists of three hooks, wherein the three hooks in the same set are on the same plane, and the angle between the hooks in the same set is 120°; the individual hooks in each set correspond one-to-one in position, forming three rows of hook sets arranged along the axial direction of the first roller shaft. The rotary roller hook-claw screening unit is equipped with an intermittent transmission unit, which can be used to drive the roller shaft to rotate intermittently.

6. The raw coal impurity removal and anti-blocking device according to claim 5, characterized in that: The intermittent transmission unit includes a first geared motor and a cam divider; The first geared motor is mounted on the base and is connected to the cam divider, which is connected to the first roller shaft.

7. The raw coal impurity removal and anti-blocking device according to claim 1, characterized in that: The hook cleaning unit includes a single-rotary scraper assembly; The single-rotary scraper assembly includes a rotating shaft and a first cleaning scraper; the rotating shaft is horizontally arranged, and both ends of the rotating shaft are connected to a third bearing seat through bearings, and the third bearing seat is arranged on a mounting bracket; There are multiple first cleaning scrapers, which are evenly arranged on the rotating shaft along the axial direction of the shaft.

8. The raw coal impurity removal and anti-blocking device according to claim 7, characterized in that: The hook cleaning unit also includes a linkage scraper assembly; The linkage scraper assembly includes a cylinder, a slide rail, a slider, a hydraulic cylinder, a second square tube, and a second cleaning scraper; The mounting bracket is equipped with cylinders and slide rails on both sides of the top. The slider is mounted on the slide rail. The piston end of the cylinder is connected to the slider. The top of the slider is fixedly connected to a fourth bearing seat. The second square tube is horizontally arranged, and a drive shaft is installed at both ends of the second square tube. Each drive shaft is connected to a fourth bearing seat through a bearing. Multiple second cleaning scrapers are fixedly connected to the second square tube along its length. The hydraulic cylinder is mounted on a mounting bracket, and the output shaft of the hydraulic cylinder is connected to a second square tube.

9. The raw coal impurity removal and anti-blocking device according to claim 1, characterized in that: The strip-type impurity removal mechanism includes a second reduction motor, a second roller shaft, and a strip; The output shaft of the second geared motor is connected to the second roller shaft, and multiple strips arranged at equal intervals are provided on the second roller shaft.

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