Screening device for filling and mining solid materials

Abstract

The invention belongs to the technical field of coal mine underground solid filling, and particularly relates to a filling mining solid material screening device which comprises a filter cylinder bottom plate, a filter cylinder bottom plate, a filter cylinder bottom plate and a screening device. The inner filter cartridge is coaxially and rotatably arranged in the filter cartridge bottom plate, and a material cavity is formed in the inner filter cartridge; the sizes of filter holes of the outer filter cartridge and the inner filter cartridge are the same, and the inner filter cartridge deflects relative to the outer filter cartridge to enable the filter holes to be crossed or overlapped to regulate and control the screening fraction; the rotation limiting mechanism is used for fixing the inner filter cartridge with the outer filter cartridge after the inner filter cartridge deflects by an angle relative to the outer filter cartridge; the feeding hopper is arranged on one side far away from the filter cartridge bottom plate, and the discharging end of the feeding hopper is communicated with the material cavity; the driving mechanism is in transmission connection with the filter cartridge bottom plate and is used for driving the filter cartridge bottom plate to rotate. The inner filter cylinder rotates relative to the outer filter cylinder, so that the filter holes of the inner filter cylinder and the outer filter cylinder are overlapped or staggered, and the particle size of screened materials can be adjusted according to different staggered degrees.

Description

Technical Field

[0001] The invention belongs to the technical field of solid filling in underground coal mines, and in particular relates to a solid material screening device for filling and mining. Background Art

[0002] In the process of applying backfill coal mining technology, the selection and processing of solid backfill materials are the key to the successful implementation of this technology. The particle size of solid backfill materials greatly affects the filling and compaction effect of the underground goaf.

[0003] The existing backfill mining solid material screening device can effectively separate solid materials such as gangue and loess, but since the filter mesh aperture is fixed, the screened material cannot be graded according to the particle size, and filters of different specifications need to be replaced. However, the filter mesh replacement process is usually complicated, which affects the screening efficiency. Therefore, a backfill mining solid material screening device is urgently needed to solve this problem. Summary of the invention

[0004] The object of the present invention is to provide a filling mining solid material screening device to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] Backfill mining solid material screening device, including:

[0007] The filter cartridge bottom plate is rotatably arranged on the bracket, and one side of the filter cartridge bottom plate is axially connected to the outer filter cartridge;

[0008] An inner filter cartridge is coaxially rotatably disposed in the filter cartridge bottom plate, and a material cavity is formed inside the inner filter cartridge;

[0009] The filter holes of the outer filter cartridge and the inner filter cartridge have the same size, and the screening particle size is regulated by deflecting the inner filter cartridge relative to the outer filter cartridge to make the filter holes cross or overlap;

[0010] A rotation limiting mechanism, used for fixing the inner filter cartridge to the outer filter cartridge after the inner filter cartridge is deflected relative to the outer filter cartridge by an angle;

[0011] A feed hopper is arranged on a side away from the filter cartridge bottom plate, and a discharge end of the feed hopper is communicated with the material cavity;

[0012] The driving mechanism is connected to the filter cartridge bottom plate in driving connection and is used for driving the filter cartridge bottom plate to rotate.

[0013] According to the filling mining solid material screening device provided by the present invention, the rotation limiting mechanism includes an inner filter cartridge support ring, and the inner filter cartridge support ring is axially connected to a side of the inner filter cartridge away from the filter cartridge bottom plate;

[0014] An outer filter cartridge support ring is coaxially rotated outside the inner filter cartridge support ring, and the outer filter cartridge support ring is used to be axially connected to the outer filter cartridge;

[0015] A plurality of screws fixed at equal intervals in the circumferential direction are fixedly connected to the outer side of the inner filter cartridge support ring, and the screws are movably arranged in movable grooves, and the movable grooves are arranged on the outer filter cartridge support ring;

[0016] The screw rod is threadedly connected with a nut, and the nut is pressed against the outer wall of the outer filter cartridge support ring when being tightened.

[0017] According to the filling mining solid material screening device provided by the present invention, the inner filter cartridge support ring is rotatably connected to a fixed vertical plate through a bearing, the fixed vertical plate is fixed to one end of the bracket, and the feed hopper is fixed to the fixed vertical plate.

[0018] According to the filling mining solid material screening device provided by the present invention, the driving mechanism includes an output part, a fixed end of the output part is fixedly connected to the other end of the bracket, and an output shaft of the output part is drivingly connected to the bottom plate of the filter cartridge.

[0019] According to the backfill mining solid material screening device provided by the present invention, the output shaft of the output part is axially connected to a planetary carrier, and a plurality of planetary gears are circumferentially rotatably connected to the planetary carrier at equal intervals, and a plurality of the planetary gears are meshed with sun gears on the inner sides, and a plurality of the planetary gears are meshed with gear rings on the outer sides, and the gear rings are axially connected to the bottom plate of the filter cartridge;

[0020] The sun gear shaft is connected to one end of the stirring shaft, the other end of the stirring shaft passes through the fixed vertical plate and is sleeved with a stirring shaft sleeve, the stirring shaft sleeve is fixed on the bracket, and the stirring shaft sleeve is fixed to the stirring shaft;

[0021] A plurality of stirring rods are fixedly connected to the stirring shaft, and the plurality of stirring rods are evenly arranged around the stirring shaft;

[0022] The planet carrier, the ring gear, the planetary gears and the sun gear are all installed in a housing, and the housing is fixedly connected to the bracket.

[0023] According to the filling mining solid material screening device provided by the present invention, the side of the stirring sleeve away from the filter cartridge bottom plate is limited by a spline and a keyway, and the limit sleeve is arranged at the end of the stirring shaft away from the filter cartridge bottom plate. The limit sleeve is slidably arranged along the axial direction of the stirring shaft, and the stirring shaft and the limit sleeve are radially limited.

[0024] According to the filling mining solid material screening device provided by the present invention, a plurality of spiral plates are fixedly connected to the inner wall of the inner filter cylinder, and the plurality of spiral plates are circumferentially arranged at equal intervals.

[0025] According to the filling mining solid material screening device provided by the present invention, the inner filter cartridge is a truncated cone structure, the large diameter end of the inner filter cartridge is arranged close to the filter cartridge bottom plate, and the outer filter cartridge structure matches the inner filter cartridge structure.

[0026] According to the filling mining solid material screening device provided by the present invention, the inclination angle of the inner wall of the inner filter cylinder is 6 to 15 degrees.

[0027] According to the filling mining solid material screening device provided by the present invention, the output part is a motor, the fixed end of the motor is fixedly connected to the bracket, and the output shaft of the motor is connected to the sun gear shaft.

[0028] Compared with the prior art, the present invention has the following advantages and technical effects:

[0029] When in use, the inner filter cartridge is rotated relative to the outer filter cartridge. Since the filter holes of the outer filter cartridge and the inner filter cartridge have the same diameter, when the inner filter cartridge is rotated relative to the outer filter cartridge, the filter holes of the two overlap or staggered with each other. According to the different degrees of staggering, the particle size of the screened material can be adjusted. When the filter holes of the two overlap with each other, the particle size of the screened material is the largest. After the inner filter cartridge is rotated relative to the outer filter cartridge, the two are fixed by the rotation limit mechanism. The material is put into the material from the feed hopper, and the driving mechanism drives the filter cartridge bottom plate to rotate to drive the outer filter cartridge and the inner filter cartridge to rotate. The material is lifted up and falls to the inner wall of the inner filter cartridge. After being beaten, the particles with a diameter smaller than the passable diameter can be screened out. By adjusting the degree of staggering of the filter holes of the inner filter cartridge and the outer filter cartridge, the material particle size can be screened out in order from small to large, and the classification of various particle sizes can be achieved without changing the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0033] Figure 3 It is a schematic diagram of the position of the movable slot of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0035] Figure 5 For the present invention Figure 4A partial enlarged view of point B in the middle;

[0036] Among them, 1. filter cartridge bottom plate; 2. outer filter cartridge; 3. inner filter cartridge; 4. fixed vertical plate; 5. inner filter cartridge support ring; 6. outer filter cartridge support ring; 7. bearing; 8. feed hopper; 9. stirring shaft; 10. stirring rod; 11. friction block; 12. stirring shaft sleeve; 13. limit shaft sleeve; 14. motor; 15. planetary carrier; 16. gear ring; 17. planetary gear; 18. screw; 19. nut; 20. movable groove; 21. deceleration groove; 22. spring; 23. slide rod; 24. sun gear; 25. spiral dial plate. DETAILED DESCRIPTION

[0037] 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 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 creative work are within the scope of protection of the present invention.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1:

[0040] Reference Figures 1 to 3 This embodiment discloses a filling mining solid material screening device, comprising:

[0041] The filter cartridge bottom plate 1 is rotatably arranged on the bracket, and one side of the filter cartridge bottom plate 1 is axially connected to an outer filter cartridge 2;

[0042] The inner filter cartridge 3 is coaxially rotatably arranged in the filter cartridge bottom plate 1, and a material cavity is formed inside the inner filter cartridge 3;

[0043] The filter holes of the outer filter cartridge 2 and the inner filter cartridge 3 have the same size, and the screening particle size can be adjusted by deflecting the inner filter cartridge 3 relative to the outer filter cartridge 2 to make the filter holes cross or overlap;

[0044] A rotation limiting mechanism is used to fix the inner filter cartridge 3 to the outer filter cartridge 2 after the inner filter cartridge 3 is deflected relative to the outer filter cartridge 2;

[0045] The feed hopper 8 is arranged on a side away from the filter cartridge bottom plate 1, and the discharge end of the feed hopper 8 is connected to the material cavity;

[0046] The driving mechanism is transmission-connected with the filter cartridge bottom plate 1 and is used for driving the filter cartridge bottom plate 1 to rotate.

[0047] When in use, the inner filter cartridge 3 is rotated relative to the outer filter cartridge 2. Since the filter holes of the outer filter cartridge 2 and the inner filter cartridge 3 have the same diameter, when the inner filter cartridge 3 is rotated relative to the outer filter cartridge 2, the filter holes of the two overlap or staggered with each other. According to the different degrees of staggering, the particle size of the screened material can be adjusted. When the filter holes of the two overlap with each other, the particle size of the screened material is the largest at this time. After the inner filter cartridge 3 is rotated relative to the outer filter cartridge 2, the two are fixed by the rotation limit mechanism. The material is put into the material from the feed hopper 8, and the driving mechanism drives the filter cartridge bottom plate 1 to rotate to drive the outer filter cartridge 2 and the inner filter cartridge 3 to rotate. The material is lifted up and falls to the inner wall of the inner filter cartridge 3. After being beaten, the particle size smaller than the passable diameter can be screened out. By adjusting the degree of staggering of the filter holes of the inner filter cartridge 3 and the outer filter cartridge 2, the material particle size can be screened out in order from small to large, and the classification of various particle sizes can be achieved without changing the filter screen.

[0048] As an optional embodiment of the present invention, the rotation limiting mechanism includes an inner filter cartridge support ring 5, and the inner filter cartridge support ring 5 is axially connected to a side of the inner filter cartridge 3 away from the filter cartridge bottom plate 1;

[0049] An outer filter cartridge support ring 6 is coaxially rotated outside the inner filter cartridge support ring 5, and the outer filter cartridge support ring 6 is used for axial connection with the outer filter cartridge 2;

[0050] A plurality of screws 18 are fixedly connected to the outer side of the inner filter cartridge support ring 5 at equal intervals in the circumferential direction. The screws 18 are movably arranged in movable grooves 20. The movable grooves 20 are provided on the outer filter cartridge support ring 6.

[0051] The screw rod 18 is threadedly connected with a nut 19 , and when the nut 19 is tightened, it is pressed against the outer wall of the outer filter cartridge support ring 6 .

[0052] When in use, first rotate the nut 19 to make it rotate on the corresponding screw 18. Under the action of the thread, the nut 19 is separated from the outer wall of the outer filter cartridge support ring 6. Then the inner filter cartridge support ring 5 and the outer filter cartridge support ring 6 can rotate relatively, and the screw 18 moves in the corresponding movable groove 20. After the adjustment is completed, tighten the nut 19 to squeeze it on the outer wall of the outer filter cartridge support ring 6 to fix it.

[0053] The movable groove 20 may be marked with scales, and the screw 18 serves as a pointer, so as to facilitate adjustment of the deflection angles of the outer filter cartridge 2 and the inner filter cartridge 3 according to the indications.

[0054] As an optional embodiment of the present invention, the inner filter cartridge support ring 5 is rotatably connected to the fixed vertical plate 4 through the bearing 7 , the fixed vertical plate 4 is fixed to one end of the bracket, and the feed hopper 8 is fixed to the fixed vertical plate 4 .

[0055] As an optional embodiment of the present invention, the driving mechanism includes an output part, a fixed end of the output part is fixedly connected to the other end of the bracket, and an output shaft of the output part is drivingly connected to the filter cartridge bottom plate 1.

[0056] As an optional embodiment of the present invention, the output shaft of the output part is axially connected to a planet carrier 15, and a plurality of planetary gears 17 are circumferentially rotatably connected to the planet carrier 15 at equal intervals, and a sun gear 24 is meshed on the inner side of the plurality of planetary gears 17, and a gear ring 16 is meshed on the outer side of the plurality of planetary gears 17, and the gear ring 16 is axially connected to the bottom plate 1 of the filter cartridge;

[0057] The sun gear 24 is connected to one end of the stirring shaft 9, and the other end of the stirring shaft 9 passes through the fixed vertical plate 4 and is sleeved with a stirring shaft sleeve 12, which is fixed on the bracket and fixed to the stirring shaft sleeve 12;

[0058] A plurality of stirring rods 10 are fixedly connected to the stirring shaft 9, and the plurality of stirring rods 10 are evenly arranged around the stirring shaft 9;

[0059] The planet carrier 15, the ring gear 16, the planetary gears 17 and the sun gear 24 are all installed in the housing, and the housing is fixedly connected to the bracket.

[0060] The stirring sleeve 12 is fixed on the bracket, and the stirring sleeve 12 is fixed to the stirring shaft 9. When the output part drives the planetary carrier 15 to rotate, since the sun gear 24 is axially connected to the stirring shaft 9 and the stirring shaft 9 is fixed, the planetary gear 17 rotates when the planetary carrier 15 rotates, thereby driving the ring gear 16 to rotate, thereby driving the filter cartridge bottom plate 1 to drive the outer filter cartridge 2 and the inner filter cartridge 3 to rotate together.

[0061] When the inner filter cartridge 3 rotates, the material at the bottom will be rolled up and lifted up. As the speed of the inner filter cartridge 3 increases, the material falls from a high place and collides with the stirring rod 10 arranged on the stirring shaft 9 during the falling process, so that the dust on the surface of the material falls off and passes through the sieve holes.

[0062] As an optional embodiment of the present invention, the side of the stirring sleeve 12 away from the filter cartridge bottom plate 1 is limited by a spline and a keyway to form a limiting sleeve 13. The limiting sleeve 13 is arranged at the end of the stirring shaft 9 away from the filter cartridge bottom plate 1. The limiting sleeve 13 is slidably arranged along the axial direction of the stirring shaft 9, and the stirring shaft 9 and the limiting sleeve 13 are radially limited.

[0063] The limited sleeve 13 slides along the axis of the stirring shaft 9, so that the spline of the limited sleeve 13 is inserted into the keyway of the stirring sleeve 12, so that the stirring shaft 9 is fixed. After the material is put into the inner filter cartridge 3, the limited sleeve 13 can be separated from the stirring sleeve 12, so that the stirring shaft 9 can be rotated. At this time, the inner filter cartridge 3 and the outer filter cartridge 2 are difficult to rotate under the action of the material and their own weight. Most of the torque output by the output part acts on the stirring shaft 9, so that the stirring shaft 9 drives each stirring rod 10 to rotate. At this time, the materials accumulated in the shape of a hill will be flattened, and then the stirring sleeve 12 and the limited sleeve 13 are limited and matched to fix the stirring shaft 9, so that the outer filter cartridge 2 and the inner filter cartridge 3 can be rotated and screened conveniently.

[0064] As an optional embodiment of the present invention, a plurality of spiral plates 25 are fixedly connected to the inner wall of the inner filter cartridge 3 , and the plurality of spiral plates 25 are arranged at equal intervals in the circumferential direction.

[0065] The spiral plate 25 is provided to facilitate lifting of materials.

[0066] As an optional embodiment of the present invention, the inner filter cartridge 3 is a truncated cone structure, the large diameter end of the inner filter cartridge 3 is arranged close to the filter cartridge bottom plate 1, and the structure of the outer filter cartridge 2 matches the structure of the inner filter cartridge 3.

[0067] As an optional embodiment of the present invention, the inclination angle of the inner wall of the inner filter cartridge 3 is 6 to 15 degrees.

[0068] This arrangement facilitates larger particles in the material to move along the slope toward the large-diameter end of the inner filter cartridge 3 .

[0069] As an optional implementation mode of the present invention, the output part is a motor 14 , a fixed end of the motor 14 is fixedly connected to the bracket, and an output shaft of the motor 14 is axially connected to the sun gear 24 .

[0070] Example 2

[0071] refer to Figures 4 to 5 The difference between this embodiment and embodiment 1 is that a speed reduction groove 21 is opened at the center of one side of the fixed vertical plate 4 close to the inner filter cartridge 3, and one end of a plurality of slide bars 23 is slidably connected in the speed reduction groove 21, and the other end of the slide bar 23 is fixedly connected to the stirring shaft 9, and a friction block 11 is slidably connected to the slide bar 23. A spring 22 is provided between the friction block 11 and the stirring shaft 9, and one end of the spring 22 is fixedly connected to the friction block 11, and the other end of the spring 22 is fixedly connected to the side wall of the stirring shaft 9. The spring 22 is sleeved on the corresponding slide bar 23. When the stirring shaft 9 rotates, the friction block 11 is thrown away from the stirring shaft 9 and frictionally cooperates with the inner wall of the speed reduction groove 21.

[0072] This embodiment provides a separation cylinder composed of an outer filter cylinder 2 and an inner filter cylinder 3 , which rotates in coordination with each stirring rod 10 .

[0073] The stirring shaft sleeve 12 is separated from the limiting shaft sleeve 13, and now both the stirring shaft 9 and the separation cylinder can rotate.

[0074] After the material is put in, the separation cylinder can be regarded as stationary under the action of the material's own weight and the outer filter cartridge 2 and the inner filter cartridge 3. At this time, the stirring shaft 9 drives the stirring rods 10 to rotate and flatten the materials piled up in the shape of hills. If the stirring rods 10 are difficult to push the material, the planetary frame 15, the ring gear 16, the planetary gear 17 and the sun gear 24 can be regarded as a rigid whole. At this time, the motor 14 directly drives the filter cartridge bottom plate 1 to drive the outer filter cartridge 2 and the inner filter cartridge 3 to rotate. During the rotation process, the material will be flattened, the resistance of the stirring rod 10 will drop sharply, and the stirring shaft 9 can rotate. However, due to the slight change in the total weight of the material, the outer filter cartridge 2 and the inner filter cartridge 3, the stirring shaft 9 will occur. In the idling situation, due to the increase in the rotation speed of the stirring shaft 9, the friction block 11 rubs against the inner wall of the speed reduction groove 21 under the action of centrifugal force, and the friction force acts as a resistance to prevent the stirring shaft 9 from rotating. Through the coordinated cooperation of the friction resistance of the stirring shaft 9 and the total weight of the material, the outer filter cartridge 2 and the inner filter cartridge 3, the gear ring 16 can drive the outer filter cartridge 2 and the inner filter cartridge 3 to rotate through the filter cartridge bottom plate 1, and can also drive the stirring shaft 9 to rotate through the sun gear 24, so that the rotation direction of the separation barrel is opposite to that of the stirring shaft 9. Through the coordinated rotation of the two, when the material is lifted up and falls freely, the probability of collision with the stirring rod 10 is increased, thereby improving the separation effect of the material and the dust.

[0075] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0076] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A solid material screening device for filling and mining, characterized in that: include: A filter cartridge bottom plate (1) is rotatably arranged on a bracket, and an outer filter cartridge (2) is axially connected to one side of the filter cartridge bottom plate (1); An inner filter cartridge (3) is coaxially rotatably arranged inside the filter cartridge bottom plate (1), and a material cavity is formed inside the inner filter cartridge (3); The filter holes of the outer filter cartridge (2) and the inner filter cartridge (3) have the same size, and the screening particle size is regulated by deflecting the inner filter cartridge (3) relative to the outer filter cartridge (2) so that the filter holes cross or overlap; A rotation limiting mechanism, used for fixing the inner filter cartridge (3) to the outer filter cartridge (2) after the inner filter cartridge (3) is rotated at a certain angle relative to the outer filter cartridge (2); A feed hopper (8) is arranged on a side away from the filter cartridge bottom plate (1), and a discharge end of the feed hopper (8) is in communication with the material cavity; A driving mechanism is in driving connection with the filter cartridge bottom plate (1) and is used for driving the filter cartridge bottom plate (1) to rotate.

2. The backfill mining solid material screening device according to claim 1 is characterized in that: The rotation limiting mechanism comprises an inner filter cartridge support ring (5), and the inner filter cartridge support ring (5) is axially connected to a side of the inner filter cartridge (3) away from the filter cartridge bottom plate (1); An outer filter cartridge support ring (6) is coaxially rotatable outside the inner filter cartridge support ring (5), and the outer filter cartridge support ring (6) is used for axial connection with the outer filter cartridge (2); A plurality of screw rods (18) fixed at equal intervals in the circumferential direction are fixedly connected to the outer side of the inner filter cartridge support ring (5); the screw rods (18) are movably arranged in a movable groove (20); and the movable groove (20) is provided on the outer filter cartridge support ring (6); The screw rod (18) is threadedly connected with a nut (19), and the nut (19) is pressed against the outer wall of the outer filter cartridge support ring (6) when being tightened.

3. The backfill mining solid material screening device according to claim 2 is characterized in that: The inner filter cartridge support ring (5) is rotatably connected to a fixed vertical plate (4) via a bearing (7); the fixed vertical plate (4) is fixed to one end of the bracket; and the feed hopper (8) is fixed to the fixed vertical plate (4).

4. The backfill mining solid material screening device according to claim 3 is characterized in that: The driving mechanism comprises an output part, a fixed end of the output part is fixedly connected to the other end of the bracket, and an output shaft of the output part is drivingly connected to the filter cartridge bottom plate (1).

5. The backfill mining solid material screening device according to claim 4 is characterized in that: The output shaft of the output part is axially connected to a planet carrier (15), and the planet carrier (15) is rotatably connected to a plurality of planetary gears (17) at equal intervals in a circumferential direction, the inner sides of the plurality of planetary gears (17) are meshed with sun gears (24), and the outer sides of the plurality of planetary gears (17) are meshed with gear rings (16), and the gear rings (16) are axially connected to the filter cartridge bottom plate (1); The sun gear (24) is axially connected to one end of a stirring shaft (9); the other end of the stirring shaft (9) passes through the fixed vertical plate (4) and is sleeved with a stirring shaft sleeve (12); the stirring shaft sleeve (12) is fixed on the bracket; and the stirring shaft sleeve (12) is fixed to the stirring shaft (9); A plurality of stirring rods (10) are fixedly connected to the stirring shaft (9), and the plurality of stirring rods (10) are evenly arranged around the stirring shaft (9); The planet carrier (15), the ring gear (16), the planetary gear (17) and the sun gear (24) are all installed in a housing, and the housing is fixedly connected to the bracket.

6. The backfill mining solid material screening device according to claim 5 is characterized in that: The side of the stirring shaft sleeve (12) away from the filter cartridge bottom plate (1) is provided with a limiting shaft sleeve (13) through a spline and a keyway limiting fit. The limiting shaft sleeve (13) is arranged at one end of the stirring shaft (9) away from the filter cartridge bottom plate (1). The limiting shaft sleeve (13) is slidably arranged along the axial direction of the stirring shaft (9). The stirring shaft (9) and the limiting shaft sleeve (13) are radially limited fit.

7. The backfill mining solid material screening device according to claim 1 is characterized in that: A plurality of spiral shifting plates (25) are fixedly connected to the inner wall of the inner filter cartridge (3), and the plurality of spiral shifting plates (25) are arranged at equal intervals in the circumferential direction.

8. The backfill mining solid material screening device according to claim 1, characterized in that: The inner filter cartridge (3) is a truncated cone-shaped structure, the large-diameter end of the inner filter cartridge (3) is arranged close to the filter cartridge bottom plate (1), and the structure of the outer filter cartridge (2) matches the structure of the inner filter cartridge (3).

9. The backfill mining solid material screening device according to claim 8, characterized in that: The inclination angle of the inner wall of the inner filter cartridge (3) is 6 to 15 degrees.

10. The backfill mining solid material screening device according to claim 5, characterized in that: The output part is a motor (14), a fixed end of the motor (14) is fixedly connected to the bracket, and an output shaft of the motor (14) is axially connected to the sun gear (24).

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