Coal gangue screening and pulverizing treatment system

Abstract

The invention relates to a coal gangue screening and pulverizing treatment system, and belongs to the field of ore treatment.The coal gangue screening and pulverizing treatment system comprises a first elevator, a sand making machine and a vibrating screen, the sand making machine comprises a crushing bin and an impeller, a feeding hopper is arranged at the top of the crushing bin, the discharging end of the first elevator communicates with the feeding hopper, and the impeller is located in the crushing bin and coaxially and rotationally connected with the crushing bin; the discharging end of the first elevator is connected with a feeding port of the vibrating screen, the discharging end of the vibrating screen is provided with a medium powder discharging pipe and a coarse powder discharging pipe, the feeding hopper is provided with a coarse powder connecting pipe and a medium powder connecting pipe, one end of the coarse powder connecting pipe is communicated with the coarse powder discharging pipe, the other end of the coarse powder connecting pipe is coaxially communicated with the impeller, and one end of the medium powder connecting pipe is communicated with the outdoor medium powder discharging pipe. And the other end is positioned above the impeller and is eccentrically arranged relative to the impeller. Materials entering the impeller are preliminarily separated through the vibrating screen, the paths of the materials not passing through the granularity in the crushing bin are different, the crushing effect on large-particle materials is improved, and the output efficiency of the impeller is improved.

Description

Technical Field

[0001] The present application relates to the field of ore processing, and in particular to a coal gangue screening and pulverizing processing system. Background Art

[0002] Coal gangue is solid waste discharged during coal mining and coal washing. It is a kind of black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. After crushing, coal gangue can be used as one of the main raw materials for geological delamination grouting.

[0003] Sand making machine is a kind of equipment used to crush large pieces of materials into sand particles. It is widely used in medium and fine crushing of various hard and brittle materials such as various rocks, abrasives, refractory materials, etc. In the related technology, the sand making machine used for coal gangue crushing is a vertical sand making machine, and its structure includes a feed hopper, a distributor, a crushing bin, an impeller and a transmission device. The impeller is rotatably arranged in the crushing bin. The impeller is a key component of the sand making machine. The material enters the center of the impeller, and the material distribution cone at the center of the impeller evenly distributes the material to each launch channel of the impeller. Wear-resistant blocks made of special materials are installed at the outlet of the launch channel. The impeller accelerates the material and ejects it around. The distributor is installed on the upper part of the impeller. The function of the distributor is to divert the material from the feed hopper. Part of the material enters the center of the impeller, and the other part of the material is directly drained and falls to the side of the impeller to form a material curtain. The material thrown out by the impeller can collide with the wear-resistant block, the material curtain or the inner wall of the crushing bin, thereby achieving the purpose of crushing.

[0004] The diversion mechanism of the diverter is random diversion, that is, the probability of materials of different particle sizes entering the center of the impeller or forming a material curtain is basically the same, and the crushing effect on the material passing through the center of the impeller is significantly greater than the crushing effect on the material particles in the material curtain around the impeller, resulting in a waste of the impeller's output efficiency and poor crushing effect on large particles in the material curtain. Summary of the invention

[0005] In order to improve the above problems, the present application provides a coal gangue screening and pulverizing processing system.

[0006] The present application provides a coal gangue screening and pulverizing processing system adopts the following technical solution: A coal gangue screening and pulverizing processing system comprises a first elevator and a sand making machine, the sand making machine comprises a crushing bin and an impeller, a feeding hopper is provided on the top of the crushing bin, the discharge end of the first elevator is connected to the feeding hopper, the impeller is located in the crushing bin and is coaxially rotatably connected to the crushing bin, and also comprises a vibrating screen, the discharge end of the first elevator is connected to the feeding port of the vibrating screen, the discharge end of the vibrating screen is provided with a medium powder discharge pipe and a coarse powder discharge pipe, the feeding hopper is provided with a coarse powder connecting pipe and a medium powder connecting pipe, one end of the coarse powder connecting pipe is connected to the coarse powder discharge pipe, and the other end is coaxially connected to the impeller, one end of the medium powder connecting pipe is connected to the medium powder discharge pipe outdoors, and the other end is located above the impeller and eccentrically arranged relative to the impeller.

[0007] By adopting the above technical solution, the material is preliminarily separated by the vibrating screen before entering the sand making machine. The material with relatively large particle size will directly enter the impeller, and the material with relatively small particle size will be distributed around the impeller and will not enter the impeller. Most of the materials with larger particle size can get a higher crushing effect, and most of the materials with smaller particle size will no longer pass through the impeller.

[0008] Preferably, it also includes a material leveling screen ring plate, which is coaxially connected to the crushing bin, and the material leveling screen ring plate is coaxially rotatable relative to the crushing bin, and a plurality of clearance holes are opened on the material leveling screen ring plate.

[0009] By adopting the above technical solution, since the pipe opening of the medium powder connecting pipe is eccentrically arranged relative to the crushing bin, the material rushing down from the medium powder connecting pipe falls on the material leveling screen ring plate, and the rotating material leveling screen ring plate can improve the uniformity of material distribution in the circumferential direction.

[0010] Preferably, the plate surface of the material mixing screen ring plate is inclined downward on one side close to the axis, a fixed axis hole is opened in the middle of the material mixing screen ring plate, a matching tube is coaxially fixedly connected to the side of the material mixing screen ring plate facing the impeller, the fixed axis hole and the matching tube are communicated, a fixing tube is coaxially fixedly connected to the side of the impeller facing the material mixing screen ring plate, the fixing tube is coaxially sleeved outside the matching tube, a control mechanism for controlling the movement of the material mixing screen ring plate is provided in the crushing bin, and when the material mixing screen ring plate moves close to the impeller, a gap is formed between the coarse powder connecting tube and the material mixing screen ring plate.

[0011] By adopting the above technical solution, after the material mixing screen ring plate moves downward, a gap is formed between it and the coarse powder connecting pipe, and due to the inclined plate surface of the material mixing screen ring plate, the material retained on the plate surface that fails to pass through the make way hole can slide to the middle part of the material mixing screen ring plate, and enter the matching pipe and the fixed pipe through the fixed axis hole, and finally enter the impeller.

[0012] Preferably, the control mechanism includes a control gear ring, a control gear, a control screw and a mounting seat, the control gear ring is rotationally connected to the crushing bin and is coaxial with the material mixing screen ring plate, the mounting seat is slidably connected to the crushing bin, and the sliding direction is parallel to the axis of the material mixing screen ring plate, the material mixing screen ring plate is rotatably set on the mounting seat, the control gear and the control screw are both provided with multiple and one-to-one coaxial threaded connections, the control gear is rotationally connected to the inner wall of the crushing bin, the control screw is slidably connected to the crushing bin, one end of the control screw is connected to the mounting seat, and the control gear ring is meshed with all the control gears at the same time.

[0013] By adopting the above technical solution, when the control gear ring rotates, all the control gears rotate simultaneously, each control screw and the mounting seat connected to the control screw move together, and the material mixing screen ring plate moves vertically accordingly.

[0014] Preferably, a synchronization step is provided on the fixed tube, a plurality of synchronization edges are fixedly connected to the synchronization step, and the plurality of matching edges are arranged in an array around the fixed tube, a matching step is fixedly connected to the matching tube, a plurality of coordination edges are fixedly connected to the matching step, and when the material mixing screen ring plate and the coarse powder connecting tube are in contact, the coordination step and the synchronization step surface are opposite, and the synchronization edge is located between adjacent coordination edges.

[0015] By adopting the above technical solution, when the fixed pipe rotates with the impeller, the synchronous edge exerts a thrust on the cooperative edge, so that the material leveling screen ring plate obtains a rotational torque and rotates synchronously with the impeller.

[0016] Preferably, a transition seat is slidably connected to the mounting seat, the material mixing screen ring plate and the transition seat are rotatably connected, the sliding direction of the transition seat is the same as the sliding direction of the mounting seat, a transition spring is fixedly connected between the transition seat and the mounting seat, the expansion and contraction direction of the transition spring is consistent with the sliding direction of the transition seat, and the control mechanism includes a vibrating member for causing the material mixing screen ring plate to shake relative to the mounting seat.

[0017] Preferably, the vibrating member is a vibrating convex roller, which is rotatably connected to the end of a fixed tube, and the axial direction of the vibrating convex roller is the radial direction of the fixed tube. After the material mixing screen ring plate moves close to the fixed tube, the roller surface of the vibrating convex roller and the material mixing screen ring plate are in rolling contact. A vibrating groove is provided on the side of the material mixing screen ring plate facing the fixed tube. During the rotation of the fixed tube, the vibrating convex roller is periodically embedded in the vibrating groove.

[0018] By adopting the above technical solution, during the rotation of the fixed pipe, each time the vibrating convex roller enters the vibrating groove, the material leveling screen ring plate will shake up and down, and the material on the material leveling screen ring plate will slide more easily after being vibrated.

[0019] Preferably, a stop pin is slidably provided on the mounting seat, and the sliding direction of the stop pin is consistent with the sliding direction of the mounting seat. The stop pin passes through the mounting seat and the transition seat at the same time, and a stop spring is connected between the stop pin and the mounting seat. In a natural state, there is a gap between the stop pin and the material leveling screen ring plate, and an abutment ring platform is fixedly connected to the inner wall of the crushing bin. When the vibrating convex roller and the material leveling screen ring plate abut, the abutment ring platform and the stop pin abut, and the stop pin and the material leveling screen ring plate abut.

[0020] By adopting the above technical solution, the anti-rotation pin and the material leveling screen ring plate abut against each other, and the material leveling screen ring plate is subjected to the abutment force and friction force from the anti-rotation pin, so it is not easy to rotate, thereby reducing the centrifugal force generated when the material leveling screen ring plate rotates and the obstacle to the material sliding down.

[0021] Preferably, it also includes a second elevator and a finished product bin, the discharge end of the vibrating screen is also provided with a fine powder discharge pipe, the fine powder discharge pipe is connected to the feed end of the second elevator, the discharge end of the second elevator is connected to the finished product bin, and the discharge end of the sand making machine is connected to the feed end of the first elevator.

[0022] By adopting the above technical solution, the materials that meet the processing requirements and are separated by the vibrating screen are directly collected as finished products, and the materials that do not meet the processing requirements are crushed and sanded. The materials after crushing and sanding are transported to the vibrating screen again through the first elevator, and then separated and collected again.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the setting of vibrating screen and medium powder discharge pipe and coarse powder discharge pipe, the material is preliminarily separated by the vibrating screen before entering the sand making machine. The material with relatively large particle size will directly enter the impeller, and the material with relatively small particle size will be distributed around the impeller without entering the impeller. In this way, most of the materials with larger particle size can get a higher crushing effect, and most of the materials with smaller particle size will no longer pass through the impeller. 2. Through the setting of the material leveling screen ring plate, since the pipe opening position of the medium powder connecting pipe is eccentrically set relative to the crushing bin, the material rushing down from the medium powder connecting pipe falls on the material leveling screen ring plate, and the rotating material leveling screen ring plate can improve the uniformity of material distribution in the circumferential direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the coal gangue screening and pulverizing processing system in the embodiment of the present application.

[0025] Figure 2 It is a schematic cross-sectional view of the overall structure of the sand making machine used to reflect the interior of the sand making machine in the embodiment of the present application.

[0026] Figure 3It is a structural schematic diagram used to reflect the control mechanism in the embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the structural principle of the anti-rotation pin in the embodiment of the present application.

[0028] Description of reference numerals: 1. first elevator; 2. vibrating screen; 21. fine powder discharge pipe; 22. medium powder discharge pipe; 23. coarse powder discharge pipe; 3. second elevator; 31. finished product bin; 4. sand making machine; 41. crushing bin; 411. abutting ring platform; 42. impeller; 421. fixed pipe; 422. synchronous step; 423. synchronous edge; 424. vibrating convex roller; 43. feeding hopper; 431. medium powder connecting pipe; 432. Coarse powder connecting pipe; 44. Material mixing screen ring plate; 441. Make way hole; 442. Fixed axis hole; 443. Matching pipe; 4431. Matching step; 4432. Coordinating edge; 444. Vibration groove; 5. Control mechanism; 51. Control gear ring; 52. Control gear; 53. Control screw; 54. Mounting seat; 541. Transition seat; 542. Transition spring; 543. Stop pin; 544. Stop spring. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] The present application embodiment discloses a coal gangue screening and pulverizing processing system, such as Figure 1 As shown, it includes a first elevator 1, a vibrating screen 2, a sand making machine 4, a second elevator 3 and a finished product bin 31. After the first elevator 1 lifts the material, the material enters the vibrating screen 2 for preliminary separation. The separated material that reaches the required particle size enters the second elevator 3 for transfer to the finished product bin 31; the material that does not reach the required particle size will enter the sand making machine 4 for crushing.

[0031] like Figure 1 As shown, the discharge end of the first elevator 1 is connected to the feed end of the vibrating screen 2, and the discharge end of the vibrating screen 2 is provided with a fine powder discharge pipe 21, a medium powder discharge pipe 22 and a coarse powder discharge pipe 23, which correspond to three sand materials of different particle size grades in sequence, wherein the fine powder discharge pipe 21 is directly connected to the feed end of the second elevator 3, and the discharge end of the second elevator 3 is connected to the finished product bin 31; and the materials passing through the medium powder discharge pipe 22 and the coarse powder discharge pipe 23 enter the sand making machine 4 for processing, and the discharge end of the sand making machine 4 is located at the bottom, which is directly connected to the feed end of the first elevator 1, that is, the materials processed by the sand making machine 4 will enter the vibrating screen 2 again through the first elevator 1 for separation. The medium powder discharge pipe 22 and the coarse powder discharge pipe 23 are both provided with stop valves (not shown in the figure) for controlling the conduction or closing of the medium powder discharge pipe 22.

[0032] like Figure 2 As shown, the sand making machine 4 includes a crushing bin 41, an impeller 42 and a material leveling screen ring plate 44. The impeller 42 is located in the crushing bin 41 and is coaxially rotatably connected to the crushing bin 41. A feed hopper 43 is provided on the top of the crushing bin 41. A coarse powder connecting pipe 432 and a medium powder connecting pipe 431 are provided on the feed hopper 43. One end of the coarse powder connecting pipe 432 is connected to the coarse powder discharge pipe 23, and the other end is coaxially connected to the impeller 42. One end of the medium powder connecting pipe 431 is connected to the medium powder discharge pipe 22 outdoors, and the other end is located above the impeller 42 and is eccentrically arranged relative to the impeller 42; that is, the material in the coarse powder connecting pipe 432 will fall into the impeller 42, and the falling point of the material in the medium powder connecting pipe 431 is located next to the axis of the impeller 42. The material mixing screen ring plate 44 is coaxially rotatably arranged in the crushing bin 41, and is located between the feed hopper 43 and the impeller 42. A plurality of clearance holes 441 are opened on the material mixing screen ring plate 44. The hollow space formed by the clearance holes 441 can allow the material in the medium powder connecting pipe 431 to pass through, but the material mixing screen ring plate 44 itself can still generate resistance to the material, so that the material stays on the material mixing screen ring plate 44 for a short time. Therefore, the rotating material mixing screen ring plate 44 can drive and spread the material falling from the medium powder connecting pipe 431 to multiple directions around the coarse powder connecting pipe 432.

[0033] like Figure 2 and 3 As shown, the rotation control of the material mixing screen ring plate 44 is driven by the impeller 42 and the fixed tube 421: a synchronous step 422 is provided on the fixed tube 421, and a plurality of synchronous edges 423 are fixedly connected to the synchronous step 422, and the plurality of matching edges are arranged in an array around the fixed tube 421; a matching step 4431 is fixedly connected to the matching tube 443, and a plurality of coordinated edges 4432 are fixedly connected to the matching step 4431. When the material mixing screen ring plate 44 and the coarse powder connecting tube 432 are in contact, the matching step 4431 and the synchronous step 422 are opposite to each other, and the synchronous edges 423 are located between adjacent coordinated edges 4432. When the fixed tube 421 rotates, the synchronous edges 423 apply a thrust to the coordinated edges 4432, so that the material mixing screen ring plate 44 obtains a rotational torque, and it rotates synchronously with the impeller 42.

[0034] like Figure 2 and 3As shown, the plate surface of the material leveling screen ring plate 44 is inclined downward on the side close to the axis, and a fixed axis hole 442 is opened in the middle of the material leveling screen ring plate 44. A matching pipe 443 is coaxially fixedly connected to the side of the material leveling screen ring plate 44 facing the impeller 42, and the fixed axis hole 442 and the matching pipe 443 are connected. A fixed pipe 421 is coaxially fixedly connected to the side of the impeller 42 facing the material leveling screen ring plate 44, and the fixed pipe 421 is coaxially sleeved outside the matching pipe 443. During normal operation, the coarse powder connecting pipe 432 is connected to the matching pipe 443, and the material enters the matching pipe 443 and then enters the fixed pipe 421, and then enters the impeller 42. The material leveling screen ring plate 44 can also move vertically, so that when it moves downward close to the impeller 42, the gap between the coarse powder connecting pipe 432 and the material leveling screen ring plate 44 is expanded, and a control mechanism 5 for controlling the movement of the material leveling screen ring plate 44 is provided in the crushing chamber 41. The control mechanism 5 includes a control gear ring 51 , a control gear 52 , a control screw 53 and a mounting seat 54 . The control gear ring 51 is rotatably connected to the crushing chamber 41 and is coaxial with the material leveling screen ring plate 44 . The mounting seat 54 is slidably connected to the crushing chamber 41, and the sliding direction is parallel to the axis of the material leveling screen ring plate 44. The material leveling screen ring plate 44 is rotatably set on the mounting seat 54. An internal thread structure is provided at the center of the control gear 52. The control gear 52 and the control screw 53 are both provided with six and one-to-one coaxial threaded connections. The control gear 52 is rotatably connected to the inner wall of the crushing chamber 41, and the control gear ring 51 is meshed with all the control gears 52 at the same time. One end of the control screw 53 is fixedly connected to the mounting seat 54; when the control gear ring 51 rotates, all the control gears 52 rotate at the same time, and each control screw 53 and the mounting seat 54 connected to the control screw 53 move together, and the material leveling screen ring plate 44 moves vertically accordingly. A motor for driving the control gear ring 51 to rotate is fixedly set on the crushing chamber, and a gear is coaxially fixedly connected to the output shaft of the motor, and the gear is meshed with the outer edge of the control gear ring 51. After the material mixing screen ring plate 44 moves downward, a gap is formed between it and the coarse powder connecting pipe 432, and due to the inclined plate surface of the material mixing screen ring plate 44, the materials retained on the plate surface that cannot pass through the clearance hole 441 can slide to the middle part of the material mixing screen ring plate 44, and enter the matching pipe 443 and the fixed pipe 421 through the fixed axis hole 442, and finally enter the impeller 42.

[0035] like Figure 2 and 3As shown, a transition seat 541 is slidably connected to the mounting seat 54, the material-scraping screen ring plate 44 and the transition seat 541 are rotatably connected, the sliding direction of the transition seat 541 is the same as the sliding direction of the mounting seat 54, a transition spring 542 is fixedly connected between the transition seat 541 and the mounting seat 54, and the expansion and contraction direction of the transition spring 542 is consistent with the sliding direction of the transition seat 541. The control mechanism 5 also includes a vibrating member for causing the material-scraping screen ring plate 44 to shake relative to the mounting seat 54 when the material-scraping screen ring plate 44 and the coarse powder connecting pipe 432 are separated. The vibrating member is a vibrating convex roller 424, which is rotatably connected to the end face of the fixed tube 421 facing the material leveling screen ring plate 44, and the axial direction of the vibrating convex roller 424 is the radial direction of the fixed tube 421; a vibrating groove 444 is provided on the side of the material leveling screen ring plate 44 facing the fixed tube 421, and after the material leveling screen ring plate 44 moves close to the fixed tube 421, the roller surface of the vibrating convex roller 424 and the material leveling screen ring plate 44 are in rolling contact, and during the rotation of the fixed tube 421, the vibrating convex roller 424 is periodically embedded in the vibrating groove 444, and each time the vibrating convex roller 424 enters the vibrating groove 444, the material leveling screen ring plate 44 shakes up and down, and the material on the material leveling screen ring plate 44 is more likely to slide after being vibrated.

[0036] like Figure 2 and 4 As shown, a stop pin 543 is slidably provided on the mounting seat 54, and the sliding direction of the stop pin 543 is consistent with the sliding direction of the mounting seat 54, and the stop pin 543 is located below the material leveling screen ring plate 44; the stop pin 543 passes through the mounting seat 54 and the transition seat 541 at the same time, and a stop spring 544 is connected between the stop pin 543 and the mounting seat 54. In the natural state, there is a gap between the stop pin 543 and the material leveling screen ring plate 44, and the crushing chamber 41 is An abutment ring platform 411 is fixedly connected to the wall. When the vibrating convex roller 424 abuts against the material leveling screen ring plate 44, the abutment ring platform 411 abuts against the stop pin 543 and pushes the stop pin 543 a certain distance, so that the stop pin 543 abuts against the material leveling screen ring plate 44. The material leveling screen ring plate 44 is subjected to the abutment force and friction force from the stop pin 543, so it is not easy to rotate, thereby reducing the resistance of the centrifugal action generated when the material leveling screen ring plate 44 rotates to the sliding of the material.

[0037] The implementation principle of a coal gangue screening and pulverizing processing system in the embodiment of the present application is: The first elevator 1 continuously transports the material to the vibrating screen 2, and the vibrating screen 2 divides the material into three parts according to the particle size according to the processing requirements, namely, fine, medium and coarse. The fine part of the material meets the processing requirements and will directly enter the second elevator 3 to be transported to the finished product bin 31, while the medium part and the coarse part of the material will enter the material leveling screen ring plate 44 and the impeller 42 of the sand making machine 4 respectively. The control mechanism 5 intermittently lowers the material leveling screen ring plate 44, opens the gap between it and the coarse powder connecting pipe 432, and allows the particles on the material leveling screen plate that have not passed through the clearance hole 441 to slide into the fixed axis hole 442 and enter the impeller 42 for crushing. It should be noted that when the material leveling screen ring plate 44 is in the downward position, the stop valves on the medium powder discharge pipe 22 and the coarse powder discharge pipe 23 of the vibrating screen 2 are in the closed state, and the material stops falling. In an implemented case of this system, the initial raw material powder entering the vibrating screen 2 has a particle size of 10-15mm, accounting for 100%, and the materials collected in the final finished product bin 31 have a particle size of less than 1 mm, accounting for 80-90%; the fine powder below 200 mesh accounts for 20-30%.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coal gangue screening and pulverizing processing system, comprising a first elevator (1) and a sand making machine (4), wherein the sand making machine (4) comprises a crushing chamber (41) and an impeller (42), a feed hopper (43) is provided on the top of the crushing chamber (41), a discharge end of the first elevator (1) is connected to the feed hopper (43), the impeller (42) is located in the crushing chamber (41) and is coaxially rotatably connected to the crushing chamber (41), and is characterized in that: It also includes a vibrating screen (2), wherein the discharge end of the first elevator (1) is connected to the feed port of the vibrating screen (2), the discharge end of the vibrating screen (2) is provided with a medium powder discharge pipe (22) and a coarse powder discharge pipe (23), the feed hopper (43) is provided with a coarse powder connecting pipe (432) and a medium powder connecting pipe (431), one end of the coarse powder connecting pipe (432) is connected to the coarse powder discharge pipe (23), and the other end is coaxially connected to the impeller (42), one end of the medium powder connecting pipe (431) is connected to the medium powder discharge pipe (22) outdoors, and the other end is located above the impeller (42) and is eccentrically arranged relative to the impeller (42).

2. A coal gangue screening and pulverizing processing system according to claim 1, characterized in that: The machine also comprises a material leveling screen ring plate (44), wherein the material leveling screen ring plate (44) is coaxially connected to the crushing bin (41), the material leveling screen ring plate (44) is coaxially rotatable relative to the crushing bin (41), and a plurality of clearance holes (441) are formed on the material leveling screen ring plate (44).

3. A coal gangue screening and pulverizing processing system according to claim 2, characterized in that: The plate surface of the material leveling screen ring plate (44) is inclined downwardly on one side close to the axis. A fixed axis hole (442) is provided in the middle of the material leveling screen ring plate (44). A matching pipe (443) is coaxially fixedly connected to the side of the material leveling screen ring plate (44) facing the impeller (42). The fixed axis hole (442) and the matching pipe (443) are in communication. A fixing pipe (421) is coaxially fixedly connected to the side of the impeller (42) facing the material leveling screen ring plate (44). The fixing pipe (421) is coaxially sleeved outside the matching pipe (443). A control mechanism (5) for controlling the movement of the material leveling screen ring plate (44) is provided in the crushing chamber (41). When the material leveling screen ring plate (44) moves close to the impeller (42), a gap is formed between the coarse powder connecting pipe (432) and the material leveling screen ring plate (44).

4. A coal gangue screening and pulverizing processing system according to claim 3, characterized in that: The control mechanism (5) comprises a control gear ring (51), a control gear (52), a control screw (53) and a mounting seat (54); the control gear ring (51) is rotatably connected to the crushing chamber (41) and is coaxial with the material leveling screen ring plate (44); the mounting seat (54) is slidably connected to the crushing chamber (41), and the sliding direction is parallel to the axis of the material leveling screen ring plate (44); the material leveling screen ring plate (44) is rotatably arranged on the mounting seat (54); the control gear (52) and the control screw (53) are both provided with a plurality of coaxial threaded connections; the control gear (52) is rotatably connected to the inner wall of the crushing chamber (41); the control screw (53) is slidably connected to the crushing chamber (41); one end of the control screw (53) is connected to the mounting seat (54); and the control gear ring (51) is meshed with all the control gears (52) at the same time.

5. A coal gangue screening and pulverizing processing system according to claim 3 or 4, characterized in that: The fixed tube (421) is provided with a synchronous step (422), and a plurality of synchronous edges (423) are fixedly connected to the synchronous step (422), and the plurality of matching edges are arranged in an array around the fixed tube (421). The matching tube (443) is fixedly connected with a matching step (4431), and a plurality of coordinated edges (4432) are fixedly connected to the matching step (4431). When the material leveling screen ring plate (44) and the coarse powder connecting tube (432) are in contact, the matching step (4431) and the synchronous step (422) are opposite to each other, and the synchronous edge (423) is located between adjacent coordinated edges (4432).

6. A coal gangue screening and pulverizing processing system according to claim 5, characterized in that: A transition seat (541) is slidably connected to the mounting seat (54); the material leveling screen ring plate (44) and the transition seat (541) are rotatably connected; the sliding direction of the transition seat (541) is the same as the sliding direction of the mounting seat (54); a transition spring (542) is fixedly connected between the transition seat (541) and the mounting seat (54); the expansion and contraction direction of the transition spring (542) is consistent with the sliding direction of the transition seat (541); and the control mechanism (5) includes a vibrating member for causing the material leveling screen ring plate (44) to shake relative to the mounting seat (54).

7. A coal gangue screening and pulverizing processing system according to claim 6, characterized in that: The vibrating member is a vibrating convex roller (424), which is rotatably connected to the end of the fixed tube (421), and the axial direction of the vibrating convex roller (424) is the radial direction of the fixed tube (421). After the material leveling screen ring plate (44) moves close to the fixed tube (421), the roller surface of the vibrating convex roller (424) and the material leveling screen ring plate (44) are in rolling contact, and a vibrating groove (444) is provided on one side of the material leveling screen ring plate (44) facing the fixed tube (421). During the rotation of the fixed tube (421), the vibrating convex roller (424) is periodically embedded in the vibrating groove (444).

8. A coal gangue screening and pulverizing processing system according to claim 7, characterized in that: A stop pin (543) is slidably provided on the mounting seat (54), and the sliding direction of the stop pin (543) is consistent with the sliding direction of the mounting seat (54). The stop pin (543) passes through the mounting seat (54) and the transition seat (541) at the same time. A stop spring (544) is connected between the stop pin (543) and the mounting seat (54). In a natural state, there is a gap between the stop pin (543) and the material leveling screen ring plate (44). An abutting ring platform (411) is fixedly connected to the inner wall of the crushing chamber (41). When the vibrating convex roller (424) and the material leveling screen ring plate (44) are in abutment, the abutting ring platform (411) and the stop pin (543) are in abutment, and the stop pin (543) and the material leveling screen ring plate (44) are in abutment.

9. A coal gangue screening and pulverizing processing system according to any one of claims 1 to 4, characterized in that: It also includes a second elevator (3) and a finished product bin (31), the discharge end of the vibrating screen (2) is also provided with a fine powder discharge pipe (21), the fine powder discharge pipe (21) is connected to the feed end of the second elevator (3), the discharge end of the second elevator (3) is connected to the finished product bin (31), and the discharge end of the sand making machine (4) is connected to the feed end of the first elevator (1).

Images