Coal mining equipment

Abstract

The invention provides coal mining equipment, which relates to the technical field of coal mining, and comprises a base, a crushing box arranged at the top of the base, a screening frame movably arranged on the side wall of the crushing box and communicated with the crushing box, and a screening part arranged in the screening frame, the pushing component is arranged on the inner wall of the screening frame and can move back and forth along the surface of the screening piece so as to prevent the coal mine from rolling, the overturning component is arranged on the pushing component, the overturning component is used for discharging the coal mine when the pushing component is close to the output end of the screening frame, and the shifting mechanism is arranged between the pushing component and the screening frame. The shifting mechanism can roll back and forth along with the pushing component attached to the surface of the screening piece so as to turn over concentrated accumulated coal mines. Coal mine materials sliding up and down from the sieve plate can be hindered so as to prolong the retention time of the coal mine materials on the sieve plate, coal mines can be thoroughly sieved, and meanwhile, the phenomenon that the sieve plate is blocked due to excessive accumulation of the coal mines can be prevented.

Description

Technical Field

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

[0002] Coal mines are areas where humans exploit coal resources in coal-rich mining areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, people generally choose to dig tunnels underground to mine coal. This is an underground coal mine. After the coal is mined, it needs to be screened by a screening machine. The screening machine uses the relative movement of bulk materials and the screen surface to allow some particles to pass through the screen holes, and classify sand, gravel, crushed stone and other materials into different levels according to particle size. Vibration screening machinery equipment.

[0003] The application number CN202310083551.8 disclosed a screening device and screening method for coal mining, which relates to the technical field of coal mining, including a screen cylinder, a pair of arc-shaped side plates are provided on the front and rear sides of the bottom of the screen cylinder, and a conveyor belt is provided on the bottom of the opposite surface of the pair of arc-shaped side plates; a pair of fixed rings are sleeved on both sides of the screen cylinder; a number of sieve holes are opened on the screen cylinder; a pair of fixed shafts are provided on the inner arc surface of the pair of arc-shaped side plates, each fixed shaft is connected to the screen cylinder through a meshing assembly, a pair of linkage shafts are provided in the screen cylinder, and a number of crushing cutters are provided in the middle section of each linkage shaft, and spiral blades are provided on both sides of each linkage shaft, and a pair of linkage shafts are connected to a pair of fixed shafts through a linkage mechanism. The present invention can effectively avoid the phenomenon of residual coal on the inner wall of the screen cylinder, which not only improves the efficiency of coal screening, but also increases the effect of coal screening.

[0004] Although the coal mining and screening device in the prior art can crush the coal and prevent the coal from remaining on the inner wall of the screen drum, after the coal is put into the screening device, the coal material will roll down quickly along the inclined screen plate or screen drum, and the coal stays on the screen plate or screen drum for a short time, so the coal material cannot be screened thoroughly. In addition, after a large amount of coal is concentrated into the screening device, the coal will accumulate irregularly on the surface of the screen plate, which will not only cause the screen plate to be blocked, but also make it inconvenient to screen the accumulated coal thoroughly. Summary of the invention

[0005] The purpose of the present invention is to address the problems that the existing coal screening equipment cannot increase the residence time of coal materials on the screen plate surface and the coal is easily piled up so that the coal cannot be screened thoroughly.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A coal mining device comprises a base, a crushing box arranged on the top of the base, a screening frame movably arranged on the side wall of the crushing box and connected thereto, and a screening element arranged inside the screening frame, and further comprises:

[0008] A blocking mechanism is arranged on the top of the screening frame, the blocking mechanism comprises a pushing component arranged on the inner wall of the screening frame and capable of reciprocating along the surface of the screening element to prevent the coal from rolling, and a flipping component arranged on the pushing component, wherein the flipping component is used to discharge the coal when the pushing component is close to the output end of the screening frame;

[0009] The toggle mechanism is arranged between the pushing component and the screening frame. The toggle mechanism can roll back and forth along with the pushing component on the surface of the screening component to turn over the concentrated and accumulated coal.

[0010] As a preferred technical solution of the present application, the pushing component includes a cylinder arranged on the side wall of the screening frame, a piston column arranged at the output end of the cylinder, a baffle frame slidably arranged on the inner wall of the screening frame, and a connecting plate arranged between the baffle frame and the piston column.

[0011] As a preferred technical solution of the present application, the flipping component includes a torsion spring shaft rotatably arranged on the inner wall of the baffle frame, a baffle plate sleeved on the outside of the torsion spring shaft, a wiping pad arranged at the bottom of the baffle plate, and a top column arranged on the inner wall of the screening frame near the output end.

[0012] As a preferred technical solution of the present application, the toggle mechanism includes fixed plates arranged on both sides of the baffle frame, a rotating rod rotatably arranged between the two fixed plates and extending outward through one side of the screening frame, a plurality of fan blades arranged on the outside of the rotating rod, a gear arranged at one end of the rotating rod located on the outside of the screening frame, and a toothed plate arranged on the outer wall of the screening frame.

[0013] As a preferred technical solution of the present application, a sealing mechanism is provided on one side of the screening frame close to its input end, and the sealing mechanism includes fixed cylinders arranged on both sides of the inner wall of the screening frame, a curved rod slidably arranged inside the fixed cylinder, a first spring arranged between the curved rod and the fixed cylinder, a sealing plate arranged between the two curved rods, and a pressure column arranged on the top of the baffle frame.

[0014] As a preferred technical solution of the present application, a shaking mechanism is provided on the top of the base, and the shaking mechanism includes a support seat arranged on the top of the base, a first motor arranged outside the support seat, a rotating column arranged at the output end of the first motor, a cam arranged on the wall of the rotating column rod, and an arc plate arranged at the bottom of the screening frame.

[0015] As a preferred technical solution of the present application, the screening element includes a sliding frame slidably arranged on the inner wall of the screening frame and a screen plate arranged on the inner wall of the sliding frame, and elastic reset members are arranged between both sides of the sliding frame and the screening frame.

[0016] As a preferred technical solution of the present application, a crushing mechanism is provided inside the crushing box, and the crushing mechanism includes a second motor arranged on the outer wall of the crushing box and two crushing rollers symmetrically arranged on the inner wall of the crushing box, wherein the end of one of the crushing rollers is connected to the output shaft of the second motor, and mutually meshing transmission teeth are provided between the two crushing rollers.

[0017] As a preferred technical solution of the present application, a feed hopper is provided on the top of the crushing box, and a flipping mechanism is provided inside the feed hopper. The flipping mechanism includes a rotating shaft rotatably arranged on the inner walls on both sides of the feed hopper and extending outward, and a flipping plate arranged on the rod wall on the inner side of the feed hopper. A transmission component is provided on the outside of the crushing box, which can drive the rotating shaft to rotate reciprocally when the crushing roller rotates.

[0018] As a preferred technical solution of the present application, a plurality of material dropping troughs are provided at the bottom of the screening frame, a collecting frame corresponding to the material dropping troughs is provided at the top of the base, collecting boxes are provided on both sides of the crushing box, guide plates with inclined structures are provided on the inner walls on both sides of the crushing box, and a discharge trough is provided at the connection between the guide plate and the crushing box.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. First, the mined coal is put into the crushing box through the feed hopper, and the coal can be crushed by the crushing mechanism. At the same time, the crushing mechanism can drive the rotating shaft to rotate back and forth through the transmission parts, and then drive the flip plate to flip the coal material in the feed hopper back and forth, which can not only prevent the feed hopper from being blocked, but also prevent the coal from falling into the gap between the crushing mechanism and the crushing box and being unable to be crushed, thereby solving the problem of too much material being put in at one time and causing the feed port to be blocked in the prior art.

[0021] 2. Through the blocking mechanism, the coal and mineral materials after crushing will fall onto the sieve plate in the screening frame for screening. At the same time, the surface of the sieve plate can be extended by the pushing component to push the coal and mineral materials back and forth, so as to block the sliding coal and mineral materials and increase the residence time of the materials on the sieve plate, so that the sieve plate can screen the coal thoroughly. When the pushing component returns to the output end of the screening frame, the blocking frame in the pushing component can be opened by the flipping component, so that the screened coal can be discharged, which solves the problem in the prior art that the coal and mineral materials roll out quickly on the surface of the sieve plate and cannot be screened thoroughly.

[0022] 3. Through the set toggle mechanism, when the pushing component pushes the sliding coal back and forth, it can also drive the rotating rod to move back and forth along the surface of the screen plate. At this time, through the set tooth plate and tooth plate, the rotating rod can roll on the surface of the screen plate, and then drive the fan blades to evenly disperse the coal falling on the surface of the screen plate to avoid concentrated accumulation of coal, further facilitate the thorough screening of coal, and solve the problem in the prior art that coal cannot be thoroughly screened because it is concentrated and accumulated when it falls on the screen plate.

[0023] 4. Through the setting of the shaking mechanism, the second motor can be started while the screen plate is screening the coal. Through the cooperation of the rotating rod, the cam and the arc plate, the screening frame can be driven to swing up and down along the connection end between it and the crushing box, thereby driving the screen plate to shake up and down. At this time, through the setting of the elastic reset part, the screen plate in the sliding frame can also be made to shake up and down while reciprocating along the length direction of the screening frame due to the effect of inertia. Therefore, the screen plate can shake both longitudinally and laterally, thereby increasing the shaking amplitude of the screen plate, further facilitating the thorough screening of the coal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall structure diagram of the present invention;

[0025] Figure 2 Another perspective structural diagram of the present invention;

[0026] Figure 3 It is a bottom view structural diagram of the present invention;

[0027] Figure 4 It is a structural diagram of the screening frame of the present invention;

[0028] Figure 5 This is a structural diagram of the screening frame and the screening element split according to the present invention;

[0029] Figure 6 This is a structural diagram of the connection between the screening element and the elastic reset element of the present invention;

[0030] Figure 7 It is a structural diagram of the flip component and the toggle component of the present invention;

[0031] Figure 8 It is a structural diagram of the blocking mechanism of the present invention;

[0032] Fig. 9 It is a cross-sectional structural diagram of a crushing box of the present invention;

[0033] Fig.10 It is a structural diagram of the transmission component of the present invention;

[0034] Fig.11 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0035] Indicated in the figure:

[0036] 1. Base; 101. Collecting frame; 2. Crushing box; 3. Screening frame; 301. Dropping chute; 4. Sliding frame; 401. Screen plate; 5. Pushing component; 501. Cylinder; 502. Piston column; 503. Baffle frame; 504. Connecting plate; 6. Turning component; 601. Torsion spring shaft; 602. Baffle plate; 603. Wiping pad; 604. Top column; 7. Toggle mechanism; 701. Fixed block; 702. Turning rod; 703. Fan blade; 704. Gear; 705. Tooth plate; 8. Blocking mechanism; 801. Fixed cylinder; 802. Bending rod; 803. First spring; 804. Sealing plate; 805. Pressure column; 9. , shaking mechanism; 901, support seat; 902, first motor; 903, rotating column; 904, cam; 905, arc plate; 10, elastic reset member; 1001, support plate; 1002, support cylinder; 1003, slide rod; 1004, second spring; 11, feed hopper; 12, crushing mechanism; 1201, second motor; 1202, crushing roller; 13, flipping mechanism; 1301, rotating shaft; 1302, flipping plate; 14, transmission component; 1401, incomplete gear; 1402, complete gear; 1403, torsion spring; 1404, belt; 15, collecting box; 16, guide plate. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0038] like Figures 1 to 6 As shown, this embodiment proposes a coal mining equipment, including a base 1, a crushing box 2 arranged on the top of the base 1, a screening frame 3 movably arranged on the side wall of the crushing box 2 and connected thereto, and a screening piece arranged inside the screening frame 3, and also includes a blocking mechanism and a toggle mechanism 7, the blocking mechanism is arranged on the top of the screening frame 3, the blocking mechanism includes a pushing component 5 arranged on the inner wall of the screening frame 3 and capable of reciprocating along the surface of the screening piece to prevent the rolling of the coal, and a flipping component 6 arranged on the pushing component 5, wherein the flipping component 6 is used to discharge the coal when the pushing component 5 is close to the output end of the screening frame 3, the toggle mechanism 7 is arranged between the pushing component 5 and the screening frame 3, and the toggle mechanism 7 can roll back and forth with the pushing component 5 on the surface of the screening piece to flip the concentrated and accumulated coal;

[0039] First, the coal and mineral materials are put into the crushing box 2 for crushing, and the crushed coal and mineral materials will fall into the screening frame 3. At this time, the coal and mineral materials can be screened by the arranged screening member. At the same time, the arranged pushing component 5 can move back and forth along the surface of the screening member to hinder the coal and mineral materials, thereby increasing the residence time of the coal and mineral materials on the screening member and facilitating the thorough screening of the coal and mineral materials. At the same time, the pushing component 5 can also drive the shifting component 7 to roll along the surface of the screening member when moving, so as to evenly disperse the coal and mineral materials accumulated on the surface of the screening member, which can not only prevent the screening member from being blocked, but also further facilitate the thorough screening of the coal and mineral materials. When the pushing component 5 moves close to the output end of the screening frame 3, the coal and mineral materials can be discharged by the arranged flipping component 6, thereby completing the screening of the coal and mineral materials after mining.

[0040] Specifically, Figure 2 and Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the pushing component 5 includes a cylinder 501 arranged on the side wall of the screening frame 3, a piston column 502 arranged at the output end of the cylinder 501, a baffle 503 slidably arranged on the inner wall of the screening frame 3, and a connecting plate 504 arranged between the baffle 503 and the piston column 502;

[0041] The flipping component 6 includes a torsion spring shaft 601 rotatably arranged on the inner wall of the baffle frame 503, a baffle plate 602 sleeved on the outer side of the torsion spring shaft 601, a wiping pad 603 arranged at the bottom of the baffle plate 602, and a top column 604 arranged on the inner wall of the screening frame 3 near the output end;

[0042] When the processed coal and mineral materials inside the crusher fall onto the screening element, the cylinder 501 can be started to work, and the piston column 502 drives the baffle frame 503 with the connecting plate 504 to move back and forth along the surface of the screen plate 401. When the baffle frame 503 moves to the discharge slot on the side of the screening frame 3 close to the crushing box 2, the baffle frame 503 will cooperate with the baffle plate 602 to push the coal and mineral materials to the side close to the crushing box 2. At this time, the coal and mineral materials that slide down can be blocked. At the same time, the wiping pad 603 at the bottom of the baffle plate 602 can also wipe and clean the surface of the screen plate 401 to prevent the screen plate 401 from being blocked. 01 moves close to the output end of the screening frame 3, the baffle 602 will be squeezed by the top column 604 and rotated. At this time, the notch in the middle of the baffle frame 503 will be opened, and the screened coal and mineral materials will be discharged from the screen plate 401. When the baffle frame 503 moves in the opposite direction again to make the baffle 602 separate from the top column 604, the torsion spring shaft 601 will drive the baffle 602 to flip down and reset to block the notch in the middle of the baffle frame 503 again. The cycle can hinder the coal and mineral materials sliding up and down the screen plate 401, increase the residence time of the coal and mineral materials on the surface of the screen plate 401, and facilitate more thorough screening of the coal and mineral materials.

[0043] like Figure 5 and Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the toggle mechanism 7 includes fixed plates 701 arranged on both sides of the baffle frame 503, a rotating rod 702 rotatably arranged between the two fixed plates 701 and extending outward through one side of the screening frame 3, a plurality of fan blades 703 arranged outside the rotating rod 702, a gear 704 arranged at one end of the rotating rod 702 located outside the screening frame 3, and a toothed plate 705 arranged on the outer wall of the screening frame 3, and a slide groove for moving the rotating rod 702 is opened on the side wall of the screening frame 3;

[0044] And when the baffle frame 503 moves back and forth, it can also drive the rotating rod 702 to move back and forth along the length direction of the screen plate 401 through the fixed plate 701. At this time, through the cooperation of the set gear 704 and the tooth plate 705, the moving rotating rod 702 can be rotated, so the rotating rod 702 can drive the fan blades 703 on its outer wall to roll back and forth on the surface of the screen plate 401, so as to evenly disperse the coal and mineral materials piled up together, which can not only prevent the accumulated coal and mineral materials from causing the screen plate 401 to be blocked, but also facilitate the screen plate 401 to thoroughly screen the evenly spread coal and mineral materials. In addition, a protective cover can be set on the outer wall of the screening frame 3 to cover the gear 704 and the tooth plate 705 to prevent foreign objects from colliding with the gear 704 and the tooth plate 705 and affecting the rolling of the rotating rod 702.

[0045] like Figure 5 and Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a blocking mechanism 8 is provided on one side of the screening frame 3 close to its input end, and the blocking mechanism 8 includes a fixed cylinder 801 arranged on both sides of the inner wall of the screening frame 3, a curved rod 802 slidably arranged inside the fixed cylinder 801, a first spring 803 arranged between the curved rod 802 and the fixed cylinder 801, a sealing plate 804 arranged between the two curved rods 802, and a pressure column 805 arranged on the top of the baffle frame 503;

[0046] When the baffle frame 503 and the baffle plate 602 push the coal and mineral materials on the screen plate 401 to approach the crushing box 2, the pressure column 805 on the top of the baffle frame 503 will squeeze the sealing plate 804. At this time, the sealing plate 804 will drive the curved rod 802 to slide toward the inside of the fixed cylinder 801 and squeeze the first spring 803. Therefore, the sealing plate 804 will also approach the discharge chute of the screening frame 3, slowing down the discharge of the crushing box 2 to prevent the coal on the screen plate 401 from accumulating too much and overflowing from the screening frame 3 when being pushed upward. When the baffle frame 503 and the baffle plate 602 are away from the crushing box 2, the first spring 803 is released from the force and drives the curved rod 802 and the sealing plate 804 to rebound and reset to open the discharge chute, so that the discharge chute can discharge normally, thereby avoiding that too much coal and mineral materials in the crushing box 2 are discharged at one time and affect the screening of the screen plate 401.

[0047] like Figure 5 and Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a shaking mechanism 9 is provided on the top of the base 1, and the shaking mechanism 9 includes a support seat 901 arranged on the top of the base 1, a first motor 902 arranged outside the support seat 901, a rotating column 903 arranged at the output end of the first motor 902, a cam 904 arranged on the rod wall of the rotating column 903, and an arc plate 905 arranged at the bottom of the screening frame 3;

[0048] The screening element comprises a sliding frame 4 slidably arranged on the inner wall of the screening frame 3 and a screening plate 401 arranged on the inner wall of the sliding frame 4. Both sides of the sliding frame 4 are provided with elastic reset elements 10 between the sliding frame 4 and the screening frame 3.

[0049] The elastic reset member 10 includes support plates 1001 symmetrically arranged on both sides of the screening frame 3, a support tube 1002 arranged on the side wall of the support plate 1001, a slide rod 1003 slidably arranged inside the support tube 1002, and a second spring 1004 arranged between the slide rod 1003 and the inner wall of the support tube 1002, and one end of the slide rod 1003 away from the support tube 1002 is fixedly connected to the slide frame 4;

[0050] When the screen plate 401 screens the coal and mineral materials that are sliding down, the first motor 902 can also be started to work and drive the cam 904 to rotate through the rotating column 903. The cam 904 will continuously lift and lower the screening frame 3 provided with the arc plate 905 during rotation, so that the screening frame 3 and the screen plate 401 can shake up and down. Because the screen plate 401 is slidably connected to the screening frame 3 through the sliding frame 4, when the screening frame 3 shakes up and down, the sliding frame 4 and the screen plate 401 will slide back and forth on the screening frame 3 under the action of gravity and inertia, and the sliding frame 4 will squeeze the second spring 1004 back and forth through the sliding rod 1003. The second spring 1004 facilitates the rebound and reset of the sliding frame 4 and the screen plate 401 which slide back and forth, so the screen plate 401 can not only vibrate longitudinally, but also vibrate laterally, thereby increasing the shaking amplitude of the screen plate 401, so that the screen plate 401 can further screen the coal mineral materials thoroughly. It should be noted that the input end of the screening frame 3 is movably connected to the outer wall of the crushing box 2 through a hinge, so that the cam 904 can lift the screening frame 3, and a discharge pipe with elastic telescopic function is also provided between the bottom of the crushing box 2 and the screening frame 3. Therefore, when the screening frame 3 shakes, the discharge pipe will also be stretched, thereby not affecting the crushed discharge.

[0051] like Figure 5 and Figure 6As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a crushing mechanism 12 is provided inside the crushing box 2, and the crushing mechanism 12 includes a second motor 1201 arranged on the outer wall of the crushing box 2 and two crushing rollers 1202 symmetrically arranged on the inner wall of the crushing box 2, wherein the end of one of the crushing rollers 1202 is connected to the output shaft of the second motor 1201, and mutually meshing transmission teeth are further provided between the two crushing rollers 1202;

[0052] A feed hopper 11 is provided on the top of the crushing box 2, and a flipping mechanism 13 is provided inside the feed hopper 11. The flipping mechanism 13 includes a rotating shaft 1301 rotatably arranged on the inner walls of both sides of the feed hopper 11 and extending outward, and a flipping plate 1302 arranged on the inner rod wall of the rotating shaft 1301 located on the inner side of the feed hopper 11. A transmission component 14 is provided outside the crushing box 2, which can drive the rotating shaft 1301 to reciprocate when the crushing roller 1202 rotates;

[0053] The transmission component 14 includes an incomplete gear 1401 and a complete gear 1402 rotatably arranged on the outer wall of the crushing box 2, a belt 1404 arranged between the complete gear 1402 and the end of the rotating shaft 1301 located on the outer side of the feed hopper 11, and a torsion spring 1403 sleeved on the rod wall of the rotating shaft 1301 located on the outer side of the feed hopper 11. The incomplete gear 1402 is connected to the end of the crushing roller 1202;

[0054] After the coal is put into the feed hopper 11, the coal will continue to fall between the two crushing rollers 1202. At this time, the second motor 1201 is started to drive one crushing roller 1202 to rotate. This crushing roller 1202 will drive the other crushing roller 1202 to rotate relative to it through the transmission teeth, so that the coal material can be crushed. At this time, the crushing roller 1202 will also drive the incomplete gear 1401 to rotate. When the incomplete gear 1401 rotates to the toothed side and contacts the complete gear 1402, it will drive the complete gear 1402 to rotate. The complete gear 1402 passes through the belt 1 404 drives the rotating shaft 1301 to rotate and twists the torsion spring 1403. When the incomplete gear 1401 rotates to the side without teeth and contacts the complete gear 1402, the torsion spring 1403 will be relieved of the force and drive the rotating shaft 1301 to reverse and reset. Therefore, when the crushing roller 1202 drives the incomplete gear 1401 to rotate continuously, it can also drive the rotating shaft 1301 to rotate reciprocatingly. The rotating shaft 1301 will flip the coal inside the feed hopper 11 back and forth through the flip plate 1302 to prevent the coal inside the feed hopper 11 from being too large and blocked, thereby facilitating the crushing roller 1202 to completely crush the evenly falling coal.

[0055] In addition, a plurality of feeding chutes 301 are provided at the bottom of the screening frame 3, a collecting frame 101 corresponding to the feeding chutes 301 is provided at the top of the base 1, collecting boxes 15 are provided on both sides of the crushing box 2, and guide plates 16 with inclined structures are provided on the inner walls of both sides of the crushing box 2, and a discharge chute is provided at the connection between the guide plate 16 and the crushing box 2; part of the coal will fall into the gap between the crushing box 2 and the crushing roller 1202, at which time these uncrushed coal materials will slide into the collecting box 15 through the guide plate 16, so as to be conveniently collected and then put into the feed hopper 11 for crushing again, and when the crushed coal falls onto the screen plate 401, the smaller coal will fall into the collecting frame 101 at the top of the base 1 through the feeding chutes at the top of the screening frame 3, while the larger coal will be output from the screen plate 401. In order to facilitate the collection of the larger output coal, a conveyor belt or a collecting box can be provided on the output end of the screening frame 3 to facilitate the collection and processing of the coal output from the screen plate 401.

[0056] The working principle of the present invention is as follows: first, the coal and mineral materials are put into the crushing box 2 for crushing, and the crushed coal and mineral materials will fall onto the sieve plate 401 in the screening frame 3 for screening. At this time, the cylinder 501 can be started to work, and the piston column 502 drives the baffle frame 503 provided with the connecting plate 504 to move back and forth along the surface of the sieve plate 401. When the baffle frame 503 moves to the discharge trough of the screening frame 3 close to the crushing box 2, the baffle frame 503 will cooperate with the baffle plate 602 to push the coal and mineral materials to the side close to the crushing box 2. At this time, the coal and mineral materials that slide down can be blocked. At the same time, the wiping pad 603 at the bottom of the baffle plate 602 can also wipe the surface of the sieve plate 401. The baffle 602 is wiped and cleaned to prevent the screen plate 401 from being blocked. When the baffle frame 401 moves close to the output end of the screening frame 3, the baffle 602 will be squeezed by the top column 604 and rotated. At this time, the notch in the middle of the baffle frame 503 will be opened, and the screened coal and mineral materials will be discharged from the screen plate 401. When the baffle frame 503 moves in the opposite direction again to make the baffle 602 disengage from the top column 604, the torsion spring shaft 601 will drive the baffle 602 to flip down and reset to block the notch in the middle of the baffle frame 503 again. The cycle in sequence can hinder the coal and mineral materials sliding up and down on the screen plate 401, increase the residence time of the coal and mineral materials on the surface of the screen plate 401, and facilitate more thorough screening of the coal and mineral materials.

[0057] Moreover, when the baffle frame 503 moves back and forth, it can also drive the rotating rod 702 to move back and forth along the length direction of the screen plate 401 through the fixed plate 701. At this time, through the cooperation of the set gear 704 and the tooth plate 705, the moving rotating rod 702 can be rotated, so the rotating rod 702 can drive the fan blades 703 on its outer wall to roll back and forth on the surface of the screen plate 401, so as to evenly disperse the coal and mineral materials piled up together, which can not only prevent the accumulated coal and mineral materials from causing blockage of the screen plate 401, but also facilitate the screen plate 401 to thoroughly screen the evenly spread coal and mineral materials. In addition, a protective cover can be set on the outer wall of the screening frame 3 to cover the gear 704 and the tooth plate 705 to prevent foreign objects from colliding with the gear 704 and the tooth plate 705 and affecting the rolling of the rotating rod 702.

[0058] At the same time, the first motor 902 can also be started to drive the cam 904 to rotate through the rotating column 903. When rotating, the cam 904 will continuously lift and lower the screening frame 3 provided with the arc plate 905, so that the screening frame 3 and the screen plate 401 can shake up and down. Therefore, when the screening frame 3 shakes up and down, the sliding frame 4 and the screen plate 401 will slide back and forth on the screening frame 3 under the action of gravity and inertia. Therefore, the screen plate 401 can not only vibrate longitudinally, but also vibrate laterally, thereby increasing the shaking amplitude of the screen plate 401, so that the screen plate 401 can further screen the coal mineral materials thoroughly.

[0059] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; all technical solutions and improvements that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A coal mining device, comprising a base (1), a crushing box (2) arranged on the top of the base (1), a screening frame (3) movably arranged on the side wall of the crushing box (2) and connected thereto, and a screening element arranged inside the screening frame (3), characterized in that: Also includes: A blocking mechanism is arranged on the top of the screening frame (3), the blocking mechanism comprising a pushing component (5) arranged on the inner wall of the screening frame (3) and capable of reciprocating along the surface of the screening element to prevent the coal from rolling, and a flipping component (6) arranged on the pushing component (5), wherein the flipping component (6) is used to discharge the coal when the pushing component (5) is close to the output end of the screening frame (3); A toggle mechanism (7) is arranged between the pushing component (5) and the screening frame (3). The toggle mechanism (7) can roll back and forth along with the pushing component (5) on the surface of the screening element to turn over the concentrated and accumulated coal.

2. A coal mining equipment according to claim 1, characterized in that: The pushing component (5) comprises a cylinder (501) arranged on the side wall of the screening frame (3), a piston column (502) arranged at the output end of the cylinder (501), a baffle (503) slidably arranged on the inner wall of the screening frame (3), and a connecting plate (504) arranged between the baffle (503) and the piston column (502).

3. A coal mining equipment according to claim 2, characterized in that: The flipping component (6) comprises a torsion spring shaft (601) rotatably arranged on the inner wall of the baffle frame (503), a baffle plate (602) sleeved on the outside of the torsion spring shaft (601), a wiping pad (603) arranged at the bottom of the baffle plate (602), and a top column (604) arranged on the inner wall of the screening frame (3) close to the output end.

4. A coal mining equipment according to claim 2, characterized in that: The toggle mechanism (7) comprises fixed plates (701) arranged on both sides of the baffle frame (503), a rotating rod (702) rotatably arranged between the two fixed plates (701) and extending outward through one side of the screening frame (3), a plurality of fan blades (703) arranged outside the rotating rod (702), a gear (704) arranged at one end of the rotating rod (702) located outside the screening frame (3), and a toothed plate (705) arranged on the outer wall of the screening frame (3).

5. The coal mining equipment according to claim 1, characterized in that: A blocking mechanism (8) is provided on one side of the screening frame (3) close to its input end, and the blocking mechanism (8) comprises fixed cylinders (801) arranged on both sides of the inner wall of the screening frame (3), a curved rod (802) slidably arranged inside the fixed cylinder (801), a first spring (803) arranged between the curved rod (802) and the fixed cylinder (801), a sealing plate (804) arranged between the two curved rods (802), and a pressure column (805) arranged on the top of the baffle frame (503).

6. A coal mining equipment according to claim 1, characterized in that: A shaking mechanism (9) is provided at the top of the base (1), and the shaking mechanism (9) comprises a support seat (901) arranged at the top of the base (1), a first motor (902) arranged outside the support seat (901), a rotating column (903) arranged at the output end of the first motor (902), a cam (904) arranged on the rod wall of the rotating column (903), and an arc plate (905) arranged at the bottom of the screening frame (3).

7. The coal mining equipment according to claim 1, characterized in that: The screening element comprises a sliding frame (4) slidably arranged on the inner wall of the screening frame (3) and a screening plate (401) arranged on the inner wall of the sliding frame (4), and elastic reset elements (10) are arranged between both sides of the sliding frame (4) and the screening frame (3).

8. The coal mining equipment according to claim 1, characterized in that: A pulverizing mechanism (12) is provided inside the pulverizing box (2), and the pulverizing mechanism (12) comprises a second motor (1201) arranged on the outer wall of the pulverizing box (2) and two pulverizing rollers (1202) symmetrically rotatably arranged on the inner wall of the pulverizing box (2), wherein the end of one of the pulverizing rollers (1202) is connected to the output shaft of the second motor (1201), and mutually meshing transmission teeth are provided between the two pulverizing rollers (1202).

9. A coal mining equipment according to claim 8, characterized in that: A feed hopper (11) is provided on the top of the crushing box (2), and a flipping mechanism (13) is provided inside the feed hopper (11). The flipping mechanism (13) comprises a rotating shaft (1301) rotatably arranged on the inner walls of both sides of the feed hopper (11) and extending outward, and a flipping plate (1302) arranged on the rotating shaft (1301) and on the inner rod wall of the feed hopper (11). A transmission component (14) is provided outside the crushing box (2) and can drive the rotating shaft (1301) to reciprocate when the crushing roller (1202) rotates.

10. The coal mining equipment according to claim 1, characterized in that: The bottom of the screening frame (3) is provided with a plurality of material dropping grooves (301), the top of the base (1) is provided with a collecting frame (101) corresponding to the material dropping grooves (301), both sides of the crushing box (2) are provided with collecting boxes (15), both sides of the inner walls of the crushing box (2) are provided with guide plates (16) with inclined structures, and a material discharge groove is provided at the connection between the guide plate (16) and the crushing box (2).

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