Multi-stage coal gangue screening device

Abstract

The invention discloses a multi-stage coal gangue screening device, and relates to the technical field of coal gangue screening, the multi-stage coal gangue screening device comprises a screening mechanism and a cleaning conveying motor mounted on one side of the screening mechanism, an inclined mechanism is arranged at the bottom of the screening mechanism, an inclined motor is arranged on one side of the bottom of the inclined mechanism, and the screening mechanism comprises a screening box; a first supporting disc is fixedly mounted on one side of the screening box, a second supporting disc is fixedly mounted at the end, away from the first supporting disc, of the screening box, rotating bearings are rotationally connected to the interiors of the first supporting disc and the second supporting disc correspondingly, and a crushing roller is fixedly mounted between the two rotating bearings; by arranging the screening mechanism, a rotating motor can be used for driving a crushing roller to rotate, first crushing protrusions collide with coal gangue so as to crush the coal gangue and coal, a cleaning conveying motor is used for driving a conveying roller and a spiral blade to rotate, and coal particles on the inner wall of the crushing roller can be swept down; and the materials are discharged through the guide chute.

Description

Technical Field

[0001] The invention relates to the technical field of coal gangue screening, in particular to a multi-stage coal gangue screening device. Background Art

[0002] Gangue is solid waste discharged during the coal mining and coal washing processes. It is a black-gray rock with a low carbon content and harder than coal that accompanies the coal seam during the coal formation process. The accumulation of gangue not only takes up land, but also can spontaneously combust, pollute the air or cause a fire. The existing gangue screening device has only single-stage screening, low screening efficiency, and cannot achieve uniform screening effect. In addition, dust flies during screening, and there is no dust removal effect, which is easy to cause environmental pollution.

[0003] Publication No. CN 114588961 A discloses a high-efficiency multi-stage coal gangue screening device, which drives the first extrusion block to squeeze the coal gangue to be screened by swinging around the cone. When the first extrusion block presses the coal gangue, it will compress the first spring. When the first extrusion block presses the coal, it will crush it. The coal gangue and the crushed coal will fall to the first screen. The tile block is driven by the protruding block to vibrate, thereby driving the screen to vibrate, so that the crushed coal will leak from the first screen to the first receiving trough, and the coal gangue and the uncrushed coal will fall to the iron conveyor belt through the second receiving trough. The coal squeezed by the second extrusion block will be crushed and the coal gangue will compress the third spring. The squeezed coal and coal gangue will fall into the fourth shell through the iron conveyor belt. The crushed coal will fall from the second screen under the fourth shell to the second discharging trough and slide out of the device through the spiral rod, and the coal gangue will be conveyed to the first discharging trough and slide out of the device. However, the patent still has the following problems in actual use: The high-efficiency multi-stage gangue screening device drives the first extrusion block to squeeze the gangue to be screened by swinging the cone around. When the first extrusion block presses the gangue, it compresses the first spring, and when the first extrusion block presses the coal, it crushes it. However, when the gangue is squeezed and crushed, the crushing force cannot be controlled, which can easily cause the gangue and coal to be crushed together, which is not only not conducive to the screening of gangue and coal, but also increases the difficulty of gangue screening, thereby affecting the efficiency of gangue screening.

[0004] The present invention proposes a multi-stage coal gangue screening device to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a multi-stage coal gangue screening device to solve the problem that the high-efficiency multi-stage coal gangue screening device proposed in the above-mentioned background technology drives the first extrusion block to extrude the coal gangue to be screened by swinging the cone around, and the first extrusion block compresses the first spring when pressing the coal gangue, and crushes the coal when the first extrusion block presses the coal. However, when the coal gangue is extruded and crushed, the crushing force cannot be controlled, which easily causes the coal gangue and the coal to be crushed together, which is not only not conducive to the screening of coal gangue and coal, but also increases the difficulty of coal gangue screening, thereby affecting the coal gangue screening efficiency.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-stage gangue screening device, comprising a screening mechanism, and a cleaning conveying motor installed on one side of the screening mechanism; The bottom of the screening mechanism is provided with a tilting mechanism, and one side of the bottom of the tilting mechanism is provided with a tilting motor; The screening mechanism comprises a screening box, a first support plate is fixedly mounted on one side of the screening box, and a second support plate is fixedly mounted on one end of the screening box away from the first support plate; The first support plate and the second support plate are both rotatably connected with a rotating bearing inside, and a crushing drum is fixedly installed between the two rotating bearings; Among them, a plurality of first crushing protrusions are fixedly installed inside the crushing drum, and a rotating motor is fixedly installed on one side inside the first supporting plate.

[0007] Preferably, the output end of the rotating motor is fixedly connected to a driving bevel gear, one side of the driving bevel gear is meshingly connected to an engaging bevel gear disk, the outer side of the engaging bevel gear disk is meshingly connected to a plurality of driven bevel gears, the engaging bevel gear disk is fixedly connected to a rotating bearing, and the cleaning conveying motor is fixedly mounted on the outer side of the first support disk.

[0008] Preferably, the output end of the cleaning conveying motor is fixedly connected to a conveying roller, and the conveying roller is rotatably connected to the second support plate. A spiral blade is fixedly installed on the outer side of the conveying roller, and a plurality of supporting sleeves are fixedly installed on the outer side of the spiral blade. The plurality of supporting sleeves are arranged at equal distances, and a telescopic slide groove is opened inside the supporting sleeve.

[0009] Preferably, a telescopic spring is provided inside the telescopic slide groove, a spring damper is provided inside the telescopic spring, the end of the spring damper is fixedly connected with a telescopic baffle, the outer side of the telescopic baffle is fixedly connected with a telescopic sliding rod, the end of the telescopic sliding rod is fixedly connected with a cleaning brush, and the lengths of several telescopic sliding rods on the outer sides of the support sleeve are arranged in an increasing manner.

[0010] Preferably, a collecting trough is provided inside the screening box near the bottom of the spiral blade, a plurality of second crushing protrusions are fixedly installed on the bottom of the collecting trough, connecting blocks are symmetrically installed on both sides of the top of the collecting trough, a first spring connecting piece is fixedly connected to the bottom of the connecting block, a vibration spring is fixedly connected to the bottom of the first spring connecting piece, a spring telescopic rod is provided inside the vibration spring, a second spring connecting piece is fixedly installed on the bottom of the spring telescopic rod, and the two second spring connecting pieces are fixedly connected to the first support plate and the second support plate, respectively.

[0011] Preferably, a material guide trough is fixedly installed on the outer side of the second support plate, and a discharge cover is rotatably connected to the bottom of the second support plate near the material guide trough, and a fixing bolt is threadedly connected to one side of the inner side of the discharge cover.

[0012] Preferably, the tilting mechanism includes a tilting base, a tilting groove is provided on the top of the tilting base, a motor protection cover is fixedly installed on one side of the bottom of the tilting base, the tilting motor is fixedly installed on one side of the inside of the motor protection cover, and the output end of the tilting motor is fixedly connected to a sprocket transmission assembly.

[0013] Preferably, one side of the sprocket transmission assembly is symmetrically connected with an inclined threaded rod, the outer side of the inclined threaded rod is threadedly connected with an inclined threaded sleeve, the top of the inclined threaded sleeve is rotatably connected with an inclined rotating rod, and the end of the inclined rotating rod is rotatably connected with a rotating support.

[0014] Preferably, a support frame is fixedly installed on the top of the two rotating supports, a placement groove is opened on the inner side of the top of the support frame, a support limit block is symmetrically installed on one side of the top of the inclined base, a connecting hinge is symmetrically installed on the side of the inclined base away from the support limit block, and the inclined base is rotatably connected to the support frame through the connecting hinge.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the multi-stage gangue screening device can not only utilize the rotating motor to drive the crushing drum to rotate by setting the screening mechanism, but also utilize the first crushing protrusion inside the crushing drum to collide with the gangue, thereby crushing the gangue and coal, and at the same time utilize the cleaning conveying motor to drive the conveying roller and the spiral blade to rotate, so as to clean up the coal particles attached to the inner wall of the crushing drum and discharge them through the guide trough, and by arranging the tilting mechanism, the tilting motor can be used to tilt the support frame to a certain angle, so as to not only realize the dumping of the screened gangue, but also facilitate the pouring of the unscreened gangue into the interior of the crushing drum through the discharge cover, so as to crush and screen the gangue. The specific contents are as follows: 1. By setting up the screening mechanism, not only can the rotating motor be used to drive the active bevel gear to rotate, but also the meshing action between the active bevel gear, the meshing bevel gear plate and the driven bevel gear can be used to realize the rotation of the rotating bearing and the crushing drum. The first crushing protrusion inside the crushing drum collides with the coal gangue, thereby crushing the coal gangue and the coal. Since the hardness of the coal gangue is greater than that of the coal, the first crushing protrusion collides with the coal gangue, thereby crushing the coal and the coal gangue. The crushed coal will adhere to the inner wall of the crushing drum, and move to the top of the crushing drum as the crushing drum rotates. At the same time, the clean conveyor The conveying motor drives the conveying roller and the spiral blade to rotate, and the elastic force of the telescopic spring is used to make the cleaning brush fit with the inner wall of the crushing drum, so as to sweep the coal particles attached to the inner wall of the crushing drum, and then fall into the surface of the collecting tank, and the coal is discharged through the guide tank by the spiral blade, so as to realize the screening function of coal and coal gangue. At the same time, due to the different lengths of the telescopic sliding rods on the outer side of the spiral blade, the spiral blade will knock the collecting tank when it rotates, and the elastic force of the vibration spring is used to realize the reciprocating vibration of the collecting tank, and the second crushing protrusion at the bottom of the collecting tank is used to further knock the coal gangue, so as to improve the screening effect of coal gangue; 2. By setting up the tilting mechanism, the tilting motor can be used to drive the sprocket transmission assembly and the tilting threaded rod to rotate, so that the tilting threaded sleeve moves on the tilting threaded rod and drives the tilting rotating rod to rotate. Under the action of the connecting hinge, the support frame is tilted at a certain angle, which not only enables the dumping of the screened coal gangue, but also facilitates the pouring of the unscreened coal gangue through the discharge cover into the inside of the crushing drum for crushing and screening of the coal gangue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the screening mechanism cross section in the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the crushing drum and the first crushing protrusion in the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating bearing and the meshing bevel gear disc in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the spiral blade and the collecting tank in the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the cross section of the support sleeve in the present invention; Figure 7 For the present invention Figure 5 A schematic diagram of the enlarged structure of the middle A area; Figure 8 It is a schematic diagram of the three-dimensional structure of the tilting mechanism in the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the inclined threaded rod and the inclined rotating rod in the present invention.

[0017] In the figure: 1, screening mechanism; 101, screening box; 102, first support plate; 103, second support plate; 104, rotating bearing; 105, crushing drum; 106, first crushing protrusion; 107, rotating motor; 108, driving bevel gear; 109, meshing bevel gear plate; 110, driven bevel gear; 111, cleaning conveying motor; 112, conveying roller; 113, spiral blade; 114, supporting sleeve; 115, telescopic slide; 116, telescopic spring; 117, spring damping; 118, telescopic baffle; 119, telescopic sliding rod; 120, cleaning brush; 121, collecting tank; 122, the first Two crushing protrusions; 123, connecting block; 124, first spring connecting piece; 125, vibration spring; 126, spring telescopic rod; 127, second spring connecting piece; 128, guide trough; 129, discharge cover; 130, fixing bolt; 2, tilting mechanism; 201, tilting base; 202, tilting slide; 203, motor protection cover; 204, tilting motor; 205, sprocket transmission assembly; 206, tilting threaded rod; 207, tilting threaded sleeve; 208, tilting rotating rod; 209, rotating support; 210, support frame; 211, placement slot; 212, support limit block; 213, connecting hinge. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described 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 creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-9The present invention provides a technical solution: a multi-stage coal gangue screening device, comprising a screening mechanism 1, and a cleaning conveying motor 111 installed on one side of the screening mechanism 1, a tilting mechanism 2 is arranged at the bottom of the screening mechanism 1, and a tilting motor 204 is arranged on one side of the bottom of the tilting mechanism 2, the screening mechanism 1 comprises a screening box 101, a first support plate 102 is fixedly installed on one side of the screening box 101, a second support plate 103 is fixedly installed on one end of the screening box 101 away from the first support plate 102, wherein the first support plate 102 and the second support plate 103 are both rotatably connected with a rotating bearing 104 inside, a crushing drum 105 is fixedly installed between the two rotating bearings 104, wherein a plurality of first crushing protrusions 106 are fixedly installed inside the crushing drum 105, a rotating motor 107 is fixedly installed on one side of the first support plate 102, an output end of the rotating motor 107 is fixedly connected with an active bevel gear 108, and one side of the active bevel gear 108 is meshingly connected with The meshing bevel gear disc 109 has a plurality of driven bevel gears 110 meshedly connected to the outer side of the meshing bevel gear disc 109. The meshing bevel gear disc 109 is fixedly connected to the rotating bearing 104. The cleaning conveying motor 111 is fixedly installed on the outer side of the first supporting disc 102. By setting the screening mechanism 1, the active bevel gear 108 can be driven to rotate by the rotating motor 107. The meshing action between the active bevel gear 108, the meshing bevel gear disc 109 and the driven bevel gear 110 is utilized to realize the rotating bearing 104. With the rotation of the crushing drum 105, the first crushing protrusion 106 inside the crushing drum 105 collides with the gangue, thereby crushing the gangue and the coal. Since the hardness of the gangue is greater than that of the coal, the first crushing protrusion 106 collides with the gangue, thereby crushing the coal and the gangue. The crushed coal will adhere to the inner wall of the crushing drum 105 and move to the top of the crushing drum 105 as the crushing drum 105 rotates.

[0020] The output end of the cleaning conveying motor 111 is fixedly connected to a conveying roller 112, and the conveying roller 112 is rotatably connected to the second support plate 103. A spiral blade 113 is fixedly installed on the outer side of the conveying roller 112, and a plurality of support sleeves 114 are fixedly installed on the outer side of the spiral blade 113. The plurality of support sleeves 114 are arranged at equal distances, and a telescopic slide groove 115 is provided inside the support sleeve 114. A telescopic spring 116 is provided inside the telescopic slide groove 115, and a spring damper 117 is provided inside the telescopic spring 116. A telescopic baffle 118 is fixedly connected to the end of the spring damper 117, and the outer side of the telescopic baffle 118 is fixedly connected A telescopic sliding rod 119 is provided, and a cleaning brush 120 is fixedly connected to the end of the telescopic sliding rod 119. The lengths of the telescopic sliding rods 119 outside the plurality of support sleeves 114 are arranged in increasing order. A collecting groove 121 is arranged at the bottom of the spiral blade 113 near the inside of the screening box 101. A plurality of second crushing protrusions 122 are fixedly installed at the bottom of the collecting groove 121. Connecting blocks 123 are symmetrically installed on both sides of the top of the collecting groove 121. A first spring connecting piece 124 is fixedly connected to the bottom of the connecting block 123. A vibration spring 125 is fixedly connected to the bottom of the first spring connecting piece 124. A spring extension spring 125 is arranged inside the vibration spring 125. The spring telescopic rod 126 is fixedly installed with a second spring connecting piece 127 at the bottom thereof, and the two second spring connecting pieces 127 are fixedly connected to the first support plate 102 and the second support plate 103 respectively. A guide groove 128 is fixedly installed on the outer side of the second support plate 103, and a discharge cover 129 is rotatably connected to the bottom of the second support plate 103 near the guide groove 128. A fixing bolt 130 is threadedly connected to the inner side of the discharge cover 129. The cleaning conveying motor 111 is used to drive the conveying roller 112 and the spiral blade 113 to rotate, and the elastic force of the telescopic spring 116 is used to make the cleaning brush 120 and the crushing drum 105 rotate. The inner wall fits together, thereby sweeping off the coal particles attached to the inner wall of the crushing drum 105, and causing them to fall onto the surface of the collecting trough 121, and the coal is discharged through the guide trough 128 by the spiral blade 113, thereby realizing the screening function of coal and coal gangue. At the same time, due to the different lengths of the telescopic sliding rod 119 on the outer side of the spiral blade 113, the collecting trough 121 will be struck when the spiral blade 113 rotates, and the elastic force of the vibration spring 125 is utilized to realize the reciprocating vibration of the collecting trough 121, and the second crushing protrusion 122 at the bottom of the collecting trough 121 is utilized to further strike the coal gangue, thereby improving the effect of coal gangue screening.

[0021] The tilting mechanism 2 includes a tilting base 201, a tilting slide groove 202 is provided on the top of the tilting base 201, a motor protection cover 203 is fixedly installed on one side of the bottom of the tilting base 201, a tilting motor 204 is fixedly installed on one side of the motor protection cover 203, an output end of the tilting motor 204 is fixedly connected to a sprocket transmission assembly 205, one side of the sprocket transmission assembly 205 is symmetrically connected to a tilting threaded rod 206, the outer side of the tilting threaded rod 206 is threadedly connected to a tilting threaded sleeve 207, the top of the tilting threaded sleeve 207 is rotatably connected to a tilting rotating rod 208, the end of the tilting rotating rod 208 is rotatably connected to a rotating support 209, a support frame 210 is fixedly installed on the top of the two rotating supports 209, and a placement groove 21 is provided on the inner side of the top of the support frame 210 1. A support limit block 212 is symmetrically installed on one side of the top of the tilting base 201, and a connecting hinge 213 is symmetrically installed on one side of the tilting base 201 away from the support limit block 212. The tilting base 201 is rotatably connected to the support frame 210 through the connecting hinge 213. By setting the tilting mechanism 2, the tilting motor 204 can be used to drive the sprocket transmission assembly 205 and the tilting threaded rod 206 to rotate, so that the tilting threaded sleeve 207 moves on the tilting threaded rod 206 and drives the tilting rotation rod 208 to rotate. Under the action of the connecting hinge 213, the support frame 210 is tilted at a certain angle, which can not only realize the dumping of the screened coal gangue, but also facilitate the pouring of the unscreened coal gangue through the discharge cover 129 into the inside of the crushing drum 105 to crush and screen the coal gangue.

[0022] Working principle: Before using this multi-stage gangue screening device, it is necessary to check the overall condition of the device to ensure that it can work normally. Figure 1 - Fig. 9As shown, first, the tilting motor 204 is started to drive the sprocket transmission assembly 205 and the tilting threaded rod 206 to rotate, so that the tilting threaded sleeve 207 moves on the tilting threaded rod 206 and drives the tilting rotating rod 208 to rotate. Under the action of the connecting hinge 213, the support frame 210 is tilted to one side of the motor protection cover 203. By loosening the fixing bolt 130 and rotating the discharge cover 129, the coal gangue can be poured into the inside of the crushing drum 105, and the discharge cover 129 is closed. Secondly, the rotating motor 107 is started to drive the active bevel gear 108 to rotate, and the active bevel gear 108, the meshing bevel gear disc 109 and the driven bevel gear 108 are used to rotate. The meshing action between the bearings 104 and the crushing drum 105 realizes the rotation of the rotating bearing 104 and the crushing drum 105, and the first crushing protrusion 106 inside the crushing drum 105 collides with the coal gangue, so that the coal gangue and the coal are crushed. Since the hardness of the coal gangue is greater than that of the coal, the first crushing protrusion 106 collides with the coal gangue, so that the coal and the coal gangue are separated. The crushed coal will adhere to the inner wall of the crushing drum 105, and move to the top of the crushing drum 105 as the crushing drum 105 rotates, and at the same time, the cleaning conveying motor 111 drives the conveying roller 112 and the spiral blade 113 The cleaning brush 120 is adapted to fit the inner wall of the crushing drum 105 by the elastic force of the telescopic spring 116, so that the coal particles attached to the inner wall of the crushing drum 105 are cleaned off and fall into the surface of the collecting tank 121, and the coal is discharged through the guide tank 128 by the spiral blade 113, so as to realize the screening function of coal and coal gangue. At the same time, due to the different lengths of the telescopic sliding rod 119 on the outer side of the spiral blade 113, the collecting tank 121 is knocked when the spiral blade 113 rotates, and the reciprocating vibration of the collecting tank 121 is realized by the elastic force of the vibration spring 125, and the collecting tank 121 is used to The second crushing protrusion 122 at the bottom further strikes the coal gangue, thereby improving the effect of coal gangue screening. Finally, when no crushed coal particles are discharged from the guide trough 128, it means that the coal gangue and the coal are completely crushed and separated. At this time, open the discharge cover 129 and start the tilting motor 204 to drive the sprocket drive assembly 205 and the tilting threaded rod 206 to rotate, so that the tilting threaded sleeve 207 moves on the tilting threaded rod 206, and drives the tilting rotating rod 208 to rotate. Under the action of the connecting hinge 213, the support frame 210 is tilted to the side away from the motor protection cover 203, so that the coal gangue can be discharged from the inside of the crushing drum 105.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage coal gangue screening device, comprising a screening mechanism (1), and a cleaning conveying motor (111) installed on one side of the screening mechanism (1); A tilting mechanism (2) is provided at the bottom of the screening mechanism (1), and a tilting motor (204) is provided at one side of the bottom of the tilting mechanism (2); It is characterized in that The screening mechanism (1) comprises a screening box (101), a first support plate (102) being fixedly mounted on one side of the screening box (101), and a second support plate (103) being fixedly mounted on one end of the screening box (101) away from the first support plate (102); The first support plate (102) and the second support plate (103) are both rotatably connected with a rotating bearing (104) inside, and a crushing roller (105) is fixedly installed between the two rotating bearings (104); A plurality of first crushing protrusions (106) are fixedly mounted inside the crushing drum (105), and a rotating motor (107) is fixedly mounted on one side of the inside of the first support plate (102).

2. A multi-stage gangue screening device according to claim 1, characterized in that: The output end of the rotating motor (107) is fixedly connected to a driving bevel gear (108), one side of the driving bevel gear (108) is meshingly connected to a meshing bevel gear disk (109), the outer side of the meshing bevel gear disk (109) is meshingly connected to a plurality of driven bevel gears (110), the meshing bevel gear disk (109) is fixedly connected to a rotating bearing (104), and the cleaning conveying motor (111) is fixedly mounted on the outer side of the first supporting disk (102).

3. A multi-stage gangue screening device according to claim 2, characterized in that: The output end of the cleaning conveying motor (111) is fixedly connected to a conveying roller (112), the conveying roller (112) is rotatably connected to the second support plate (103), a spiral blade (113) is fixedly mounted on the outer side of the conveying roller (112), a plurality of supporting sleeves (114) are fixedly mounted on the outer side of the spiral blade (113), the plurality of supporting sleeves (114) are arranged at equal distances, and a telescopic sliding groove (115) is provided inside the supporting sleeve (114).

4. A multi-stage gangue screening device according to claim 3, characterized in that: A telescopic spring (116) is arranged inside the telescopic slide groove (115), a spring damper (117) is arranged inside the telescopic spring (116), the end of the spring damper (117) is fixedly connected to a telescopic baffle (118), the outer side of the telescopic baffle (118) is fixedly connected to a telescopic sliding rod (119), the end of the telescopic sliding rod (119) is fixedly connected to a cleaning brush (120), and the lengths of the telescopic sliding rods (119) outside the support sleeve (114) are arranged in increasing order.

5. A multi-stage gangue screening device according to claim 4, characterized in that: A collecting trough (121) is provided inside the screening box (101) near the bottom of the spiral blade (113); a plurality of second crushing protrusions (122) are fixedly mounted on the bottom of the collecting trough (121); connecting blocks (123) are symmetrically mounted on both sides of the top of the collecting trough (121); a first spring connecting piece (124) is fixedly connected to the bottom of the connecting block (123); a vibration spring (125) is fixedly connected to the bottom of the first spring connecting piece (124); a spring telescopic rod (126) is provided inside the vibration spring (125); a second spring connecting piece (127) is fixedly mounted on the bottom of the spring telescopic rod (126); and two second spring connecting pieces (127) are fixedly connected to the first support plate (102) and the second support plate (103), respectively.

6. A multi-stage gangue screening device according to claim 5, characterized in that: A material guide trough (128) is fixedly mounted on the outer side of the second support plate (103); a material discharge cover (129) is rotatably connected to the bottom of the second support plate (103) near the material guide trough (128); a fixing bolt (130) is threadedly connected to one side of the inner side of the material discharge cover (129).

7. The multi-stage gangue screening device according to claim 1, characterized in that: The tilting mechanism (2) comprises a tilting base (201), a tilting slot (202) is provided on the top of the tilting base (201), a motor protection cover (203) is fixedly mounted on one side of the bottom of the tilting base (201), the tilting motor (204) is fixedly mounted on one side inside the motor protection cover (203), and a sprocket transmission assembly (205) is fixedly connected to the output end of the tilting motor (204).

8. A multi-stage gangue screening device according to claim 7, characterized in that: One side of the sprocket transmission assembly (205) is symmetrically connected to an inclined threaded rod (206), the outer side of the inclined threaded rod (206) is threadedly connected to an inclined threaded sleeve (207), the top of the inclined threaded sleeve (207) is rotatably connected to an inclined rotating rod (208), and the end of the inclined rotating rod (208) is rotatably connected to a rotating support (209).

9. The multi-stage gangue screening device according to claim 8, characterized in that: A support frame (210) is fixedly mounted on the top of the two rotating supports (209); a placement groove (211) is provided on the inner side of the top of the support frame (210); a support limit block (212) is symmetrically mounted on one side of the top of the tilting base (201); a connecting hinge (213) is symmetrically mounted on the side of the tilting base (201) away from the support limit block (212); and the tilting base (201) is rotatably connected to the support frame (210) via the connecting hinge (213).

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