Coal mining and processing equipment

Abstract

The present invention relates to the field of screening technology, specifically a coal mining and processing equipment, comprising a frame; and multiple groups of guide rails fixedly mounted on the frame; a screen plate is provided on the frame, and a slider is fixedly mounted on the screen plate; a screening slot is provided on the screen plate; the apertures of the screening slots on the screen plate are different and decrease in a vertical downward direction; a discharge ramp is fixedly mounted on the frame; a swing shaft is rotatably mounted on the frame, and a feed hopper is fixedly mounted on the swing shaft; a feeding mechanism is provided on the frame, which can drive the feed hopper to swing back and forth when the feeding mechanism is in operation; multiple groups of rake plates are provided on the frame; a rake mechanism is provided on the frame; the rake mechanism can drive the rake plate to move horizontally on the screen plate when the feeding mechanism is in operation; a screening mechanism is provided on the frame, which can drive the sieve plate to slide back and forth when the feeding mechanism is in operation, so as to drive the slider to slide back and forth on the guide rail; the mutual cooperation of the rake mechanism, the screening mechanism and the feeding mechanism can effectively improve the screening efficiency and screening accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of screening, in particular to coal mining and processing equipment. Background Art

[0002] Coal mining typically involves underground and open-pit mining. Underground mining involves excavating tunnels to extract coal from coal seams. This process requires the use of various mining equipment, such as excavators, loaders, and conveyors. Once the coal is excavated, it must be transported to surface processing plants or transport vehicles. During transportation, the coal must be screened and sorted.

[0003] Coal mines use screening and grading to separate coal into products of varying quality and specifications, supplying users with the right products for optimal coal utilization and energy conservation. For example, lump coal can be supplied to railway steam locomotives and fertilizer plants, while fine coal can be supplied to power plants, effectively utilizing coal resources. Screening also removes impurities such as gangue and silt from raw coal, reducing ash content and improving coal quality. Common screening methods include coal screening machines.

[0004] Coal screening machines are usually composed of multiple groups of screening plates that are inclined and arranged in layers. Each layer of screening plates is provided with slots. The transport mechanism transports the coal blocks to the first layer of screening plates. Under the action of gravity, the coal blocks roll downward on the screening plates. During the rolling process, coal blocks with particle sizes smaller than the slots will fall through the slots onto the lower screening plates for screening. The rolling speed of the coal blocks is related to the inclination angle of the screening plates. When the inclination angle of the screening plates is larger, the rolling speed of the coal blocks is faster, while the efficiency of downward transmission through the slots is reduced, which is not conducive to improving screening efficiency. When the inclination angle of the screening plates is smaller, the rolling speed of the coal blocks is slower, thereby increasing the probability of slot blockage, which is also not conducive to improving screening efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a coal mining and processing device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A coal mining and processing device includes a screening device for stacking screened coal blocks into piles and then drying them for subsequent use;

[0008] The screening device includes a frame and multiple sets of guide rails fixedly mounted on the frame;

[0009] The frame is provided with multiple sets of sieve plates in the vertical direction, and sliders are fixedly mounted on the sieve plates to be slidably engaged with the guide rails; the sieve plates are provided with multiple sets of screening notches; the apertures of the screening notches on each set of sieve plates are different and decrease in sequence in the vertical downward direction; the frame is fixedly provided with multiple sets of discharge ramps;

[0010] A swing shaft is rotatably mounted on the frame, and a feed hopper is fixedly mounted on the swing shaft;

[0011] A feeding mechanism is provided on the frame, and when the feeding mechanism is in operation, it can drive the feeding hopper to swing back and forth.

[0012] As a further solution of the present invention: a plurality of rake plates are provided on the frame;

[0013] The frame is provided with a rake mechanism; the rake mechanism can drive the rake plate to move horizontally on the screen plate when the feeding mechanism is in operation;

[0014] The frame is provided with a screening mechanism, which can drive the screen plate to slide back and forth when the feeding mechanism is in operation, thereby driving the slider to slide back and forth on the guide rail;

[0015] The raking mechanism includes a cylinder fixedly mounted on the frame, a push rod slidably mounted in the cylinder, a vertically arranged first connecting rod fixedly mounted on the end of the push rod, and a plurality of sliding rods fixedly mounted on the first connecting rod, each of the sliding rods being fixedly connected to a raking plate;

[0016] A sliding sleeve is fixedly mounted on the highest end of the first connecting rod, a first protruding column is fixedly mounted inside the sliding sleeve, a first rotating shaft is rotatably mounted on the frame, and the first rotating shaft is slidably connected to the sliding sleeve; a spiral groove is formed on the first rotating shaft and slidably engages with the first protruding column; a first pulley is fixedly mounted on the first rotating shaft;

[0017] The feeding mechanism includes a second rotating shaft rotatably mounted on the frame, a second pulley fixedly mounted on the second rotating shaft, and the second pulley is connected to the first pulley via a belt; a second rotating rod fixedly mounted on the second rotating shaft, and a swinging protrusion column fixedly mounted on the second rotating rod.

[0018] As a further solution of the present invention: a swing connecting rod is fixedly installed on the feed hopper, and a swing sliding groove is provided on the swing connecting rod and is slidably engaged with the swing protrusion column.

[0019] As a further solution of the present invention: the screening mechanism includes a first rotating rod fixedly mounted on the first rotating shaft, and a screening protrusion column is fixedly mounted on the first rotating rod; a plurality of lifting plates are slidably engaged on the frame body, and a plurality of the lifting plates are fixedly mounted with screening connecting rods.

[0020] As a further solution of the present invention: a screening chute is provided on the screening connecting rod and is slidably engaged with the screening protrusion column; multiple groups of second protrusion columns are fixedly installed on the screen plate, and multiple groups of screening slots are provided on the lifting plate, and the screening slots are slidably engaged with the second protrusion columns.

[0021] As a further solution of the present invention: the screening trough includes multiple groups of first inclined troughs and multiple groups of second inclined troughs, and the multiple groups of first inclined troughs and the multiple groups of second inclined troughs are alternately arranged and connected to each other.

[0022] As a further solution of the present invention: the discharge ramps are arranged at an angle, and the ends of each group of the discharge ramps correspond to different areas.

[0023] As a further solution of the present invention: the distance between each group of rake plates and the corresponding sieve plates is different, and the distance is larger than the aperture of the screening notch on the corresponding sieve plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the feeding mechanism drives the feeding hopper to swing and feed, which can effectively avoid the coal blocks from piling up in one place and reducing the subsequent screening efficiency; the screening mechanism drives the screen plate to slide back and forth with a small amplitude and high frequency, which can effectively speed up the speed of the coal blocks passing through the screening slot and improve the screening efficiency; the rake mechanism drives the rake plate to move back and forth, which can avoid the screening slot from being blocked, thereby improving the screening efficiency, and can avoid the coal blocks with large particle size differences from being transported to the same transport device, thereby affecting the screening accuracy; the mutual cooperation of the rake mechanism, the screening mechanism and the feeding mechanism can effectively improve the screening efficiency and the screening accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a structural diagram of an embodiment of coal mining and processing equipment.

[0026] Figure 2 This is a structural schematic diagram of another perspective of an embodiment of coal mining and processing equipment.

[0027] Figure 3 for Figure 2 Schematic diagram of the structure from a local cross-sectional perspective.

[0028] Figure 4 This is a structural diagram of a screening mechanism in an embodiment of coal mining and processing equipment.

[0029] Figure 5 for Figure 4 Schematic diagram of the structure at point A.

[0030] Figure 6 for Figure 4 Schematic diagram of the structure at point B.

[0031] Figure 7 for Figure 4 A structural diagram from another perspective.

[0032] Figure 8 for Figure 7 Schematic diagram of the structure at point C in the middle.

[0033] Figure 9 This is a structural schematic diagram of a feeding mechanism in an embodiment of coal mining and processing equipment.

[0034] In the figure: 1. frame;

[0035] 2. Cylinder;

[0036] 3. Ejector rod;

[0037] 4. First connecting rod;

[0038] 5. Slider;

[0039] 6. Rake board;

[0040] 7. Sliding sleeve; 701. First protruding column;

[0041] 8. First rotating shaft; 801. Spiral groove; 802. First pulley;

[0042] 9. First rotating rod; 901. Screening protrusion column;

[0043] 10. Screening connecting rod; 1001. Screening chute;

[0044] 11. Lifting plate;

[0045] 12. Second rotating shaft; 1201. Second pulley;

[0046] 13. Second rotating rod; 1301. Swinging protrusion column;

[0047] 14. Feed hopper; 1401. Swing shaft;

[0048] 15. Swing connecting rod; 1501. Swing chute;

[0049] 16. Screen plate; 1601. Second raised column; 1602. Screening notch; 1603. Sliding block;

[0050] 17. Screening trough; 1701. First inclined trough; 1702. Second inclined trough;

[0051] 18. Discharge ramp;

[0052] 19. Guide rail. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0055] See also Figures 1 to 9 In an embodiment of the present invention, a coal mining and processing device includes a screening device, which is used to pile up the screened coal blocks and then dry them for subsequent use.

[0056] In another embodiment of the present invention, the screening device includes a frame 1; and a plurality of guide rails 19 fixedly mounted on the frame 1;

[0057] The frame 1 is provided with multiple sets of sieve plates 16 in the vertical direction, and the sieve plates 16 are fixedly mounted with sliders 1603 that are slidably engaged with the guide rails 19; the sieve plates 16 are provided with multiple sets of screening notches 1602; the apertures of the screening notches 1602 on each set of sieve plates 16 are different and decrease in order in the vertical downward direction; the frame 1 is fixedly mounted with multiple sets of discharge ramps 18;

[0058] The frame 1 is rotatably mounted with a swing shaft 1401, and the swing shaft 1401 is fixedly mounted with a feed hopper 14;

[0059] The frame 1 is provided with a feeding mechanism, which can drive the feeding hopper 14 to swing back and forth when the feeding mechanism is in operation;

[0060] The frame 1 is provided with a plurality of rake plates 6;

[0061] The frame 1 is provided with a raking mechanism; the raking mechanism can drive the raking plate 6 to move horizontally on the sieve plate 16 when the feeding mechanism is in operation;

[0062] The frame 1 is provided with a screening mechanism, which can drive the screen plate 16 to slide back and forth when the feeding mechanism is in operation, thereby driving the slider 1603 to slide back and forth on the guide rail 19 .

[0063] Taking the embodiment combining all the features described in this application as an example, when in use, the transport device continuously transports the coal blocks of different particle sizes that have been washed and crushed to the feed hopper 14.

[0064] The feeding mechanism drives the feed hopper 14 to swing back and forth, so that the swing shaft 1401 and the frame 1 rotate in coordination, thereby evenly feeding the coal blocks in the feed hopper 14 onto the top screen plate 16; the feeding mechanism drives the feed hopper 14 to swing and feed, which can effectively prevent the coal blocks from accumulating in one place and reducing the subsequent screening efficiency.

[0065] When the feeding mechanism is in motion, the screening mechanism also moves synchronously. The action of the screening mechanism drives the screen plate 16 to slide back and forth. At this time, the slider 1603 will slide back and forth in the guide rail 19, and the sliding frequency is high and the amplitude is relatively small. When the screen plate 16 slides back and forth, the coal blocks on the top screen plate 16 that are smaller than the aperture of the screening slot 1602 will fall on the screen plate 16 below; while the coal blocks that are larger than the aperture of the screening slot 1602 will remain on the current screen plate 16; the fallen coal blocks will pass through the screening slot 1602 on the lower screen plate 16 and continue to fall to the next screen plate 16. By driving the screen plate 16 to slide back and forth with a small amplitude and high frequency by the screening mechanism, the speed at which the coal blocks pass through the screening slot 1602 can be effectively accelerated, thereby improving the screening efficiency.

[0066] When the screening mechanism is in operation, the rake mechanism will also operate synchronously, and the action of the rake mechanism drives the rake plate 6 to move back and forth on the screen plate 16, and can push the coal blocks on the screen plate 16 that cannot pass through the screening slots 1602 onto the loading and unloading ramp 18. The action of the rake mechanism drives the rake plate 6 to move back and forth, which can prevent the screening slots 1602 from being blocked, thereby improving the screening efficiency and preventing coal blocks with large particle sizes from being transported to the same transport device, which would affect the screening accuracy.

[0067] The mutual cooperation of the raking mechanism, the screening mechanism and the feeding mechanism can effectively improve the screening efficiency and screening accuracy.

[0068] In another embodiment of the present invention, the raking mechanism includes a cylinder 2 fixedly mounted on the frame 1, a push rod 3 is slidably mounted in the cylinder 2, a vertically arranged first connecting rod 4 is fixedly mounted on the end of the push rod 3, and multiple groups of sliding rods 5 are fixedly mounted on the first connecting rod 4, and each of the sliding rods 5 is fixedly connected to one of the rake plates 6.

[0069] Taking the embodiment of the combination of all the features recorded in this application as an example, when in use, when the cylinder 2 is in motion, it can drive the push rod 3 to extend outward or retract inward; when the push rod 3 extends outward or retracts inward, it will drive the first connecting rod 4 to displace synchronously, so as to drive all the sliding rods 5 in the vertical direction to slide synchronously on the frame 1, thereby driving the rake plate 6 to reciprocate on the screen plate 16; during the reciprocating translation of the rake plate 6, it will contact the coal blocks larger than the aperture of the corresponding screening notch 1602, and drive the coal blocks to displace synchronously until they enter the discharge ramp 18; as the rake plate 6 reciprocates, the flow of coal blocks on the screen plate 16 can be accelerated to improve the efficiency of coal blocks with a particle size smaller than the aperture of the screening notch 1602 falling into the lower screen plate 16 through the screening notch 1602, and the screening notch 1602 can be avoided from being blocked, so as to improve the screening efficiency, and to avoid coal blocks with large particle size differences from being transported to the same transport device, thereby affecting the screening accuracy.

[0070] In another embodiment of the present invention, a sliding sleeve 7 is fixedly installed on the highest end of the first connecting rod 4, a first raised column 701 is fixedly installed inside the sliding sleeve 7, a first rotating shaft 8 is rotatably installed on the frame 1, and the first rotating shaft 8 is slidingly connected to the sliding sleeve 7; a spiral groove 801 is provided on the first rotating shaft 8, which is slidingly engaged with the first raised column 701; and a first pulley 802 is fixedly installed on the first rotating shaft 8.

[0071] Taking the embodiment combining all the features recorded in the present application as an example, when in use, the movement of the first connecting rod 4 can drive the sliding sleeve 7 to synchronously displace on the first rotating shaft 8; the first protruding column 701 slides with the spiral groove 801, thereby driving the first rotating shaft 8 to rotate, thereby driving the first pulley 802 to rotate; as the movement direction of the first connecting rod 4 is different, the rotation direction of the first rotating shaft 8 is also different; the first rotating shaft 8 is connected to the screening mechanism, and the first pulley 802 is connected to the feeding mechanism, so when the raking mechanism is in motion, it can drive the first rotating shaft 8 to rotate, thereby driving the first pulley 802 to rotate, thereby driving the screening mechanism and the feeding mechanism to move synchronously; through the mutual cooperation of the raking mechanism, the screening mechanism and the feeding mechanism, the screening efficiency and screening accuracy can be effectively improved.

[0072] In another embodiment of the present invention, the feeding mechanism includes a second rotating shaft 12 rotatably mounted on the frame 1, a second pulley 1201 is fixedly mounted on the second rotating shaft 12, and the second pulley 1201 is connected to the first pulley 802 by a belt; a second rotating rod 13 is fixedly mounted on the second rotating shaft 12, a swinging protrusion column 1301 is fixedly mounted on the second rotating rod 13; a swinging connecting rod 15 is fixedly mounted on the feeding hopper 14, and a swinging groove 1501 is provided on the swinging connecting rod 15 for sliding engagement with the swinging protrusion column 1301.

[0073] Taking the embodiment combining all the features described in this application as an example, when in use, when the first pulley 802 rotates, it will drive the second pulley 1201 to rotate through the belt, thereby driving the second rotating shaft 12 to rotate; the rotating second rotating shaft 12 can drive the second rotating rod 13 to rotate, thereby driving the swinging protrusion column 1301 to rotate; when the swinging protrusion column 1301 rotates, it will slide with the swinging slide 1501, thereby driving the feed hopper 14 to swing back and forth on the frame 1 along the swinging rotating shaft 1401 through the swinging connecting rod 15.

[0074] The discharge port of the reciprocatingly swinging feed hopper 14 evenly distributes the coal blocks continuously transported by the transport device onto the screen plate 16 as the swing proceeds, so as to avoid the coal blocks piling up and reducing the screening efficiency.

[0075] According to another embodiment of the present invention, the screening mechanism includes a first rotating rod 9 fixedly mounted on the first rotating shaft 8, and a screening protrusion column 901 is fixedly mounted on the first rotating rod 9; a plurality of lifting plates 11 are slidably engaged on the frame body 1, and a plurality of lifting plates 11 are fixedly mounted with screening connecting rods 10, and the screening connecting rods 10 are provided with screening chutes 1001 that are slidably engaged with the screening protrusion columns 901; a plurality of second protrusion columns 1601 are fixedly mounted on the screen plate 16, and a plurality of screening slots 17 are provided on the lifting plate 11, and the screening slots 17 are slidably engaged with the second protrusion columns 1601.

[0076] Taking the embodiment combining all the features described in this application as an example, when in use, when the first rotating shaft 8 rotates, it will drive the first rotating rod 9 to rotate synchronously, thereby driving the screening protrusion column 901 to slide and cooperate with the screening chute 1001, so as to drive the screening connecting rod 10 to rise and fall back and forth, thereby driving the lifting plate 11 to rise and fall back and forth.

[0077] During the reciprocating lifting and sliding process of the lifting plate 11, the screening slot 17 will slide and cooperate with the second protruding column 1601, thereby driving the screen plate 16 to slide horizontally back and forth on the frame 1, thereby driving the slider 1603 to slide back and forth on the guide rail 19, thereby improving the screening efficiency.

[0078] The screening mechanism drives the screen plate 16 to slide back and forth in a small amplitude and high frequency, which can effectively speed up the speed at which the coal blocks pass through the screening slot 1602 and improve the screening efficiency.

[0079] In another embodiment of the present invention, the screening slots 17 include multiple groups of first inclined slots 1701 and multiple groups of second inclined slots 1702 , and the multiple groups of first inclined slots 1701 and the multiple groups of second inclined slots 1702 are alternately arranged and communicated with each other.

[0080] Taking the embodiment combining all the features described in this application as an example, when in use, the inclination directions of the first inclined groove 1701 and the second inclined groove 1702 are opposite; when the second raised column 1601 slides in the first inclined groove 1701, the first inclined groove 1701 will squeeze the second raised column 1601, thereby driving the sieve plate 16 to translate on the frame 1; and when the second raised column 1601 slides from the first inclined groove 1701 to the second inclined groove 1702 and slides in the second inclined groove 1702, the second inclined groove 1702 will squeeze the second raised column 1601, thereby driving the sieve plate 16 to translate on the frame 1, and the translation direction is opposite to the direction of translation of the sieve plate 16 when the second raised column 1601 slides in the first inclined groove 1701. Since multiple groups of first inclined grooves 1701 and multiple groups of second inclined grooves 1702 are provided, the screen plate 16 slides back and forth on the frame 1; the screening mechanism drives the screen plate 16 to slide back and forth with a small amplitude and high frequency, which can effectively speed up the speed of coal blocks passing through the screening groove 1602 and improve the screening efficiency.

[0081] In another embodiment of the present invention, the discharge ramps 18 are arranged at an angle, and the ends of each group of the discharge ramps 18 correspond to different areas.

[0082] Taking the embodiment combining all the features described in this application as an example, when in use, each screen plate 16 is connected to a different discharge ramp 18, and the end of each discharge ramp 18 corresponds to a different area, so that after the rake plate 6 pushes the coal blocks of corresponding size onto the discharge ramp 18, the inclined discharge ramp 18 can speed up the transportation speed of the coal blocks and transport them to different areas, thereby avoiding the screening failure caused by the screened coal blocks being discharged from one place.

[0083] In another embodiment of the present invention, the spacing between each group of rake plates 6 and the corresponding sieve plates 16 is different, and the spacing is greater than the aperture of the screening notch 1602 on the corresponding sieve plate 16 .

[0084] Taking the embodiment combining all the features described in this application as an example, when in use, there is a gap between the rake plate 6 and the corresponding sieve plate 16, and the gap is slightly larger than the aperture of the screening notch 1602 on the corresponding sieve plate 16. Therefore, when the rake mechanism drives the rake plate 6 to move back and forth, it will only collide with the coal blocks that cannot pass through the screening notch 1602, and drive the coal blocks to move synchronously until they enter the discharge ramp 18. This can effectively prevent coal blocks with large particle sizes from being transported out through the same discharge ramp 18, thereby improving screening accuracy and screening efficiency.

[0085] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0086] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A coal mining and processing equipment, characterized in that, It includes a screening device, which is used to pile up the screened coal blocks and then dry them for subsequent use; The screening device comprises a frame (1) and a plurality of guide rails (19) fixedly mounted on the frame (1); The frame (1) is provided with a plurality of sieve plates (16) in the vertical direction, and a slider (1603) is fixedly mounted on the sieve plates (16) and is slidably engaged with the guide rail (19); the sieve plates (16) are provided with a plurality of sieve slots (1602); the apertures of the sieve slots (1602) on each group of sieve plates (16) are different and decrease in order in the vertical downward direction; the frame (1) is fixedly provided with a plurality of discharge ramps (18); A swing shaft (1401) is rotatably mounted on the frame (1), and a feed hopper (14) is fixedly mounted on the swing shaft (1401); A feeding mechanism is provided on the frame (1), and when the feeding mechanism is in operation, it can drive the feeding hopper (14) to swing back and forth; The frame (1) is provided with a plurality of rake plates (6); The frame (1) is provided with a raking mechanism; the raking mechanism can drive the raking plate (6) to move horizontally on the screen plate (16) when the feeding mechanism is in operation; The frame (1) is provided with a screening mechanism, which is capable of driving the screen plate (16) to slide back and forth when the feeding mechanism is actuated, thereby driving the slider (1603) to slide back and forth on the guide rail (19); The raking mechanism comprises a cylinder (2) fixedly mounted on the frame (1), a push rod (3) slidably mounted in the cylinder (2), a vertically arranged first connecting rod (4) fixedly mounted on the end of the push rod (3), a plurality of slide rods (5) fixedly mounted on the first connecting rod (4), and each slide rod (5) is fixedly connected to a raking plate (6); A sliding sleeve (7) is fixedly mounted on the highest end of the first connecting rod (4), a first protruding column (701) is fixedly mounted inside the sliding sleeve (7), a first rotating shaft (8) is rotatably mounted on the frame (1), and the first rotating shaft (8) is slidably connected to the sliding sleeve (7); a spiral groove (801) is provided on the first rotating shaft (8) and is slidably engaged with the first protruding column (701); a first pulley (802) is fixedly mounted on the first rotating shaft (8); The feeding mechanism comprises a second rotating shaft (12) rotatably mounted on the frame (1); a second pulley (1201) is fixedly mounted on the second rotating shaft (12); the second pulley (1201) is connected to the first pulley (802) via a belt; a second rotating rod (13) is fixedly mounted on the second rotating shaft (12); a swinging protrusion column (1301) is fixedly mounted on the second rotating rod (13); A swing connecting rod (15) is fixedly mounted on the feed hopper (14), and a swing chute (1501) is provided on the swing connecting rod (15) for sliding engagement with the swing protrusion column (1301); The screening mechanism comprises a first rotating rod (9) fixedly mounted on the first rotating shaft (8), and a screening protrusion column (901) fixedly mounted on the first rotating rod (9); a lifting plate (11) is slidably engaged on the frame (1), and a screening connecting rod (10) is fixedly mounted on the lifting plate (11); The screening connecting rod (10) is provided with a screening chute (1001) that is slidably engaged with the screening protrusion column (901); multiple groups of second protrusion columns (1601) are fixedly installed on the screen plate (16); and multiple groups of screening slots (17) are provided on the lifting plate (11), and the screening slots (17) are slidably engaged with the second protrusion columns (1601).

2. The coal mining and processing equipment according to claim 1, characterized in that: The screening trough (17) comprises a plurality of groups of first inclined troughs (1701) and a plurality of groups of second inclined troughs (1702), wherein the plurality of groups of the first inclined troughs (1701) and the plurality of groups of the second inclined troughs (1702) are alternately arranged and communicated with each other.

3. The coal mining and processing equipment according to claim 1, characterized in that: The discharge ramps (18) are arranged at an inclination, and the areas corresponding to the ends of each group of the discharge ramps (18) are different.

4. The coal mining and processing equipment according to claim 1, characterized in that: The spacing between each group of rake plates (6) and the corresponding sieve plates (16) is different, and the spacing is greater than the aperture of the screening slots (1602) on the corresponding sieve plates (16).

Images