Coal gangue screening and powdering treatment system

Abstract

The application relates to a coal gangue screening and powdering treatment system, belonging to the field of ore treatment, which 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 discharge end of the first elevator is communicated with the feeding hopper. The impeller is located in the crushing bin and is coaxially connected with the crushing bin in a rotating mode. 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 communicated with the coarse powder discharge pipe, and the other end is coaxially communicated with the impeller. One end of the medium powder connecting pipe is communicated with the medium powder discharge pipe, and the other end is located above the impeller and is arranged eccentrically relative to the impeller. The application preliminarily separates the material entering the impeller through the vibrating screen. The paths of the materials not passing through the granularity are different in the crushing bin, the crushing effect on the 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, in particular to a coal gangue screening and powdering processing system. BACKGROUND

[0002] Coal gangue is a solid waste discharged in the process of coal mining and coal washing, and is a black gray rock with low carbon content and higher hardness than coal, which is associated with coal seams in the coal forming process. After crushing, coal gangue can be used as one of the main raw materials for geological separation grouting.

[0003] A sand making machine is a device for crushing large pieces of material into sand particles, which is widely used in the medium crushing and fine crushing of various hard and brittle materials such as rock, abrasive and refractory material. In the related art, the sand making machine for crushing coal gangue is a vertical sand making machine, which includes a feed hopper, a distributor, a crushing chamber, an impeller and a transmission device. The impeller is rotatably arranged in the crushing chamber, and the impeller is a key element of the sand making machine. The material enters the center of the impeller, and the material is evenly distributed to each emission channel of the impeller by the distribution cone at the center of the impeller. A wear-resistant block made of special material is installed at the outlet of the emission channel. The impeller accelerates and throws the material outward. The distributor is installed on the upper part of the impeller. The function of the distributor is to distribute the material from the feed hopper. Part of the material enters the center of the impeller, and the other part of the material directly falls to the side of the impeller to form a material curtain. The material thrown by the impeller can collide with the wear-resistant block, the material curtain or the inner wall of the crushing chamber, thereby achieving the purpose of crushing.

[0004] The distribution mechanism of the distributor is random distribution. The probability of different particle sizes of the material entering the center of the impeller or forming a material curtain is basically the same. However, the crushing effect of the material passing through the center of the impeller is significantly greater than that of the material particles in the material curtain around the impeller, thereby causing waste of the output efficiency of the impeller and poor crushing effect of the large particle material in the material curtain. SUMMARY

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

[0006] The coal gangue screening and powdering processing system provided by the present application adopts the following technical scheme:

[0007] The coal gangue screening and powder processing system comprises a first elevator and a sand making machine, the sand making machine comprises a crushing chamber and an impeller, the top of the crushing chamber is provided with an inlet hopper, the outlet end of the first elevator is communicated with the inlet hopper, the impeller is located in the crushing chamber and is coaxially connected with the crushing chamber in a rotating mode, and the system further comprises a vibrating screen, the outlet end of the first elevator is connected with the inlet of the vibrating screen, the outlet end of the vibrating screen is provided with a medium powder outlet pipe and a coarse powder outlet pipe, the inlet 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 outlet pipe, the other end is coaxially communicated with the impeller, one end of the medium powder connecting pipe is communicated with the medium powder outlet pipe, and the other end is located above the impeller and is arranged eccentrically relative to the impeller.

[0008] By adopting the above technical scheme, the material is preliminarily separated by the vibrating screen before entering the sand making machine, the material with relatively large particle size directly enters the impeller, the material with relatively small particle size is distributed around the impeller and does not enter the impeller, and then most of the material with relatively large particle size can obtain higher crushing effect and most of the material with relatively small particle size does not pass through the inside of the impeller.

[0009] Preferably, the system further comprises a material uniformizing ring plate, the material uniformizing ring plate is coaxially connected in the crushing chamber, the material uniformizing ring plate is coaxially arranged relative to the crushing chamber in a rotating mode, and a plurality of accommodation holes are formed in the material uniformizing ring plate.

[0010] By adopting the above technical scheme, since the pipe opening position of the medium powder connecting pipe is arranged eccentrically relative to the crushing chamber, the material falling from the medium powder connecting pipe falls on the material uniformizing ring plate, and the rotating material uniformizing ring plate can improve the uniformity of the material distribution in the circumferential direction.

[0011] Preferably, one side of the plate surface of the material uniformizing ring plate close to the axis is inclined downward, a shaft fixing hole is formed in the middle of the material uniformizing ring plate, a matching pipe is fixedly connected to one side of the material uniformizing ring plate close to the impeller in a coaxial mode, the shaft fixing hole is communicated with the matching pipe, a fixing pipe is fixedly connected to one side of the impeller close to the material uniformizing ring plate in a coaxial mode, the fixing pipe is coaxially sleeved outside the matching pipe, a control mechanism for controlling the movement of the material uniformizing ring plate is arranged in the crushing chamber, and a gap is formed between the coarse powder connecting pipe and the material uniformizing ring plate when the material uniformizing ring plate moves close to the impeller.

[0012] By adopting the above technical scheme, after the material uniformizing ring plate moves downward, a gap is formed between the material uniformizing ring plate and the coarse powder connecting pipe, and due to the inclined plate surface of the material uniformizing ring plate, the material remaining on the plate surface and failing to pass through the accommodation hole can slide to the middle of the material uniformizing ring plate and enter the matching pipe and the fixing pipe through the shaft fixing hole, and finally enter the impeller.

[0013] Preferably, the control mechanism comprises a control gear ring, control gears, a control screw and a mounting seat, the control gear ring and the crushing chamber are rotationally connected and coaxial with the uniform screen ring plate, the mounting seat and the crushing chamber are slidingly connected, the sliding direction of the mounting seat is parallel to the axis of the uniform screen ring plate, the uniform screen ring plate is rotationally arranged on the mounting seat, the control gears are coaxially and threadedly connected, the control gears and the inner wall of the crushing chamber are rotationally connected, the control screw and the crushing chamber are slidingly connected, one end of the control screw is connected with the mounting seat, and the control gear ring is engaged with all the control gears.

[0014] By adopting the above technical scheme, when the control gear ring rotates, all the control gears rotate at the same time, each control screw and the mounting seat connected with the control screw move together, and the uniform screen ring plate moves vertically.

[0015] Preferably, the fixed tube is provided with a synchronous step, a plurality of synchronous edges are fixedly connected to the synchronous step, a plurality of matching edges are arranged around the fixed tube, a matching step is fixedly connected to the matching tube, a plurality of cooperative edges are fixedly connected to the matching step, when the uniform screen ring plate contacts the coarse powder connecting tube, the matching step and the synchronous step are opposite to each other, and the synchronous edges are located between adjacent cooperative edges.

[0016] By adopting the above technical scheme, when the fixed tube rotates with the impeller, the synchronous edges apply a thrust force to the cooperative edges, so that the uniform screen ring plate obtains a rotating torque, and it rotates synchronously with the impeller.

[0017] Preferably, a transition seat is slidingly connected to the mounting seat, the uniform screen ring plate and the transition seat are rotationally connected, the sliding direction of the transition seat is the same as that of the mounting seat, a transition spring is fixedly connected between the transition seat and the mounting seat, the extension direction of the transition spring is consistent with the sliding direction of the transition seat, and the control mechanism comprises a vibrating member for causing the uniform screen ring plate to shake relative to the mounting seat.

[0018] Preferably, the vibrating member is a vibrating convex roller, the vibrating convex roller is rotationally connected to the end of the fixed tube, the axial direction of the vibrating convex roller is the radial direction of the fixed tube, the roller surface of the vibrating convex roller is in rolling contact with the uniform screen ring plate after the uniform screen ring plate moves close to the fixed tube, a vibrating groove is formed in the side of the uniform screen ring plate facing the fixed tube, and the vibrating convex roller is periodically embedded in the vibrating groove during the rotation of the fixed tube.

[0019] By adopting the above technical scheme, the uniform screen ring plate shakes up and down once every time the vibrating convex roller enters the vibrating groove during the rotation of the fixed tube, and the material on the uniform screen ring plate is more easily slid after receiving the vibrating action.

[0020] Preferably, a rotation-stopping pin is arranged to slide on the mounting seat, the sliding direction of the rotation-stopping pin is consistent with the sliding direction of the mounting seat, the rotation-stopping pin passes through the mounting seat and the transition seat at the same time, a rotation-stopping spring is connected between the rotation-stopping pin and the mounting seat, and a gap is formed between the rotation-stopping pin and the material-distributing sieve ring plate in a natural state. An abutting ring table is fixedly connected to the inner wall of the crushing chamber. When the vibrating convex roller abuts against the material-distributing sieve ring plate, the abutting ring table abuts against the rotation-stopping pin, and the rotation-stopping pin abuts against the material-distributing sieve ring plate.

[0021] By adopting the above technical solution, the rotation-stopping pin abuts against the material-distributing sieve ring plate, the material-distributing sieve ring plate is subjected to the abutting force and the friction force from the rotation-stopping pin, and thus is not prone to rotating, and the centrifugal effect generated when the material-distributing sieve ring plate rotates is weakened, thereby reducing the hindrance to the material sliding.

[0022] Preferably, the system further comprises a second elevator and a finished product chamber, the discharge end of the vibrating screen is provided with a fine powder discharge pipe, the fine powder discharge pipe is in communication with the discharge end of the second elevator, the discharge end of the second elevator is in communication with the finished product chamber, and the discharge end of the sand making machine is in communication with the discharge end of the first elevator.

[0023] By adopting the above technical solution, the material that meets the processing requirements and is separated by the vibrating screen can be directly collected as finished products, the material that does not meet the processing requirements is crushed to make sand, and the material after being crushed to make sand is transported to the vibrating screen again through the first elevator, so as to be separated and collected again.

[0024] To sum up, the present application has at least one of the following beneficial technical effects:

[0025] 1. By arranging the vibrating screen and the medium powder discharge pipe and the 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 directly enters the impeller, and the material with relatively small particle size is distributed around the impeller and does not enter the impeller, so that most of the material with relatively large particle size can obtain higher crushing effect, and most of the material with relatively small particle size does not pass through the inside of the impeller.

[0026] 2. By arranging the material-distributing sieve ring plate, the material falling from the medium powder connecting pipe falls on the material-distributing sieve ring plate, and the rotating material-distributing sieve ring plate can improve the uniformity of the material distribution in the circumferential direction. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of a coal gangue screening and powder making processing system in the embodiment of the present application.

[0028] Figure 2 is a schematic diagram of the overall structure of the inside of a sand making machine in the embodiment of the present application.

[0029] Figure 3 It is a structural diagram used to reflect the control mechanism in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram illustrating the structural principle of the anti-rotation pin in the embodiment of the present application.

[0031] Explanation 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 leveling screen ring plate; 441. Clearance 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

[0032] The following is combined with Figures 1-4 This application is described in further detail.

[0033] 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 and is transferred 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.

[0034] like Figure 1 As shown, the discharge end of the first elevator 1 is connected to the feed end of the vibrating screen 2. The discharge end of the vibrating screen 2 is equipped with a fine powder discharge pipe 21, a medium powder discharge pipe 22, and a coarse powder discharge pipe 23, corresponding to three different particle size grades of sand material. 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. The material passing through the medium powder discharge pipe 22 and the coarse powder discharge pipe 23 enters the sand making machine 4 for processing. The discharge end of the sand making machine 4 is located at the bottom and directly connected to the feed end of the first elevator 1. That is, after being processed by the sand making machine 4, the material will pass through the first elevator 1 again and enter the vibrating screen 2 for separation. The medium powder discharge pipe 22 and the coarse powder discharge pipe 23 are both equipped with stop valves (not shown) to control whether the medium powder discharge pipe 22 is open or closed.

[0035] As Figure 2 shown, the sand making machine 4 includes a crushing chamber 41, an impeller 42, and a uniform material screen ring plate 44. The impeller 42 is located in the crushing chamber 41 and is coaxially connected for rotation with the crushing chamber 41. The top of the crushing chamber 41 is provided with an inlet hopper 43. The inlet 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 in communication with the coarse powder discharge pipe 23, and the other end is in communication with the impeller 42 coaxially. One end of the medium powder connecting pipe 431 is in communication with the outdoor medium powder discharge pipe 22, 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 beside the axis of the impeller 42. The uniform material screen ring plate 44 is coaxially arranged in the crushing chamber 41 and is located between the inlet hopper 43 and the impeller 42. The uniform material screen ring plate 44 is provided with a plurality of accommodation holes 441. The accommodation holes 441 form a hollow space that allows the material in the medium powder connecting pipe 431 to pass through, but the uniform material screen ring plate 44 itself still produces resistance to the material, so that the material is temporarily retained on the uniform material screen ring plate 44. Thus, the rotating uniform material 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.

[0036] As Figure 2 and 3 shown, the rotation control of the uniform material screen ring plate 44 is driven by the impeller 42 and the fixed pipe 421. The fixed pipe 421 is provided with a synchronous step 422, and a plurality of synchronous edges 423 are fixedly connected to the synchronous step 422. The plurality of synchronous edges 423 are arranged around the fixed pipe 421. The cooperating pipe 443 is fixedly connected with a cooperating step 4431, and a plurality of cooperative edges 4432 are fixedly connected to the cooperating step 4431. When the uniform material screen ring plate 44 contacts the coarse powder connecting pipe 432, the cooperating step 4431 and the synchronous step 422 are opposite to each other, and the synchronous edges 423 are located between adjacent cooperative edges 4432. When the fixed pipe 421 rotates, the synchronous edges 423 exert a pushing force on the cooperative edges 4432, so that the uniform material screen ring plate 44 obtains a rotating torque, and it synchronously rotates with the impeller 42.

[0037] As Figure 2 and 3As shown, the plate surface of the uniform material screen ring plate 44 on the side close to the axis is inclined downward, the middle part of the uniform material screen ring plate 44 is provided with a fixed shaft hole 442, and the side of the uniform material screen ring plate 44 facing the impeller 42 is coaxially fixedly connected with a matching pipe 443, and the fixed shaft hole 442 and the matching pipe 443 are communicated. The side of the impeller 42 facing the uniform material screen ring plate 44 is coaxially fixedly connected with a fixed pipe 421, and the fixed pipe 421 coaxially sleeves the matching pipe 443. In the normal working process, the coarse powder connecting pipe 432 communicates with the matching pipe 443, the material enters the matching pipe 443 and then enters the fixed pipe 421, and then enters the impeller 42. The uniform material screen ring plate 44 can also be vertically moved, so that when it moves downward and close to the impeller 42, the gap between the coarse powder connecting pipe 432 and the uniform material screen ring plate 44 is enlarged, and the crushing chamber 41 is provided with a control mechanism 5 for controlling the movement of the uniform material screen ring plate 44. The control mechanism 5 comprises a control tooth ring 51, a control gear 52, a control screw 53 and a mounting seat 54, the control tooth ring 51 is rotationally connected with the crushing chamber 41 and coaxial with the uniform material screen ring plate 44. The mounting seat 54 is slidingly connected with the crushing chamber 41, the sliding direction is parallel to the axis of the uniform material screen ring plate 44, the uniform material screen ring plate 44 is rotationally arranged on the mounting seat 54, the control gear 52 is provided with an internal thread structure in the center, the control gear 52 and the control screw 53 are each provided with six and coaxially threadedly connected, the control gear 52 is rotationally connected with the inner wall of the crushing chamber 41, the control tooth ring 51 is engaged with all the control gears 52 at the same time, one end of the control screw 53 is fixedly connected with the mounting seat 54; when the control tooth ring 51 rotates, all the control gears 52 rotate at the same time, each control screw 53 and the mounting seat 54 connected with the control screw 53 move together, and the uniform material screen ring plate 44 moves vertically, and a motor for driving the control tooth ring 51 to rotate is fixedly arranged on the crushing chamber, a gear is coaxially fixedly connected with the output shaft of the motor, and the gear is engaged with the outer edge of the control tooth ring 51. After the uniform material screen ring plate 44 moves downward, a gap is formed between the uniform material screen ring plate 44 and the coarse powder connecting pipe 432, and due to the inclined plate surface of the uniform material screen ring plate 44, the material remaining on the plate surface which fails to pass through the gap hole 441 can slide to the middle part of the uniform material screen ring plate 44 and enter the matching pipe 443 and the fixed pipe 421 through the fixed shaft hole 442, and finally enter the impeller 42.

[0038] As Figure 2 and 3As shown, the mounting seat 54 is slidably connected with a transition seat 541, the uniform material screen ring plate 44 is rotationally connected with the transition seat 541, the sliding direction of the transition seat 541 is the same as the sliding direction of the mounting seat 54, the transition spring 542 is fixedly connected between the transition seat 541 and the mounting seat 54, and the extension direction of the transition spring 542 is consistent with the sliding direction of the transition seat 541. The control mechanism 5 further comprises a vibrating member for causing the uniform material screen ring plate 44 to shake relative to the mounting seat 54 when the uniform material screen ring plate 44 is separated from the coarse powder connecting pipe 432. The vibrating member is a vibrating convex roller 424, which is rotationally connected to the end face of the fixed pipe 421 on the side facing the uniform material screen ring plate 44, and the axial direction of the vibrating convex roller 424 is the radial direction of the fixed pipe 421; the side of the uniform material screen ring plate 44 facing the fixed pipe 421 is provided with a vibrating groove 444, and after the uniform material screen ring plate 44 moves close to the fixed pipe 421, the roller surface of the vibrating convex roller 424 is in rolling contact with the uniform material screen ring plate 44. During the rotation of the fixed pipe 421, the vibrating convex roller 424 is periodically embedded in the vibrating groove 444, and the uniform material screen ring plate 44 shakes up and down once every time the vibrating convex roller 424 enters the vibrating groove 444. After the material on the uniform material screen ring plate 44 is subjected to the vibrating action, it is more likely to slide.

[0039] As shown in Figure 2 and 4 As shown, the mounting seat 54 is slidably connected with a transition seat 541, the uniform material screen ring plate 44 is rotationally connected with the transition seat 541, the sliding direction of the transition seat 541 is the same as the sliding direction of the mounting seat 54, the transition spring 542 is fixedly connected between the transition seat 541 and the mounting seat 54, and the extension direction of the transition spring 542 is consistent with the sliding direction of the transition seat 541. The control mechanism 5 further comprises a vibrating member for causing the uniform material screen ring plate 44 to shake relative to the mounting seat 54 when the uniform material screen ring plate 44 is separated from the coarse powder connecting pipe 432. The vibrating member is a vibrating convex roller 424, which is rotationally connected to the end face of the fixed pipe 421 on the side facing the uniform material screen ring plate 44, and the axial direction of the vibrating convex roller 424 is the radial direction of the fixed pipe 421; the side of the uniform material screen ring plate 44 facing the fixed pipe 421 is provided with a vibrating groove 444, and after the uniform material screen ring plate 44 moves close to the fixed pipe 421, the roller surface of the vibrating convex roller 424 is in rolling contact with the uniform material screen ring plate 44. During the rotation of the fixed pipe 421, the vibrating convex roller 424 is periodically embedded in the vibrating groove 444, and the uniform material screen ring plate 44 shakes up and down once every time the vibrating convex roller 424 enters the vibrating groove 444. After the material on the uniform material screen ring plate 44 is subjected to the vibrating action, it is more likely to slide.

[0040] The implementation principle of the coal gangue screening and powder processing system according to the embodiment of the present application is as follows:

[0041] The first elevator 1 continuously transports the material to the vibrating screen 2, which divides the material into fine, medium and coarse parts according to the particle size according to the processing requirements, wherein the fine part of the material is the material meeting the processing requirements, which will be directly transported into the second elevator 3 to the finished product bin 31, and the medium part of the material and the coarse part of the material will enter the uniform material screen ring plate 44 and the impeller 42 of the sand making machine 4 respectively. The control mechanism 5 intermittently makes the uniform material screen ring plate 44 descend, opens the gap between the uniform material screen ring plate 44 and the coarse powder connecting pipe 432, and makes the particles on the uniform material screen ring plate that do not pass through the clearance hole 441 slide into the fixed shaft hole 442 and enter the impeller 42 for crushing. It should be noted that when the uniform material screen ring plate 44 is in the descending 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 is temporarily stopped from falling. In a case of implementation of the system, the initial raw material particle size of the powder entering the vibrating screen 2 is 10-15mm, accounting for 100%, and the material collected in the finished product bin 31 is 80-90% below 1mm; the fine powder below 200 meshes accounts for 20-30%.

[0042] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within 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 feeding hopper (43) is provided on the top of the crushing chamber (41), and the impeller (42) is located in the crushing chamber (41) and is coaxially rotatably connected to the crushing chamber (41), characterized in that: It also includes a vibrating screen (2), 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), and the other end is located above the impeller (42) and is eccentrically arranged relative to the impeller (42); The machine further comprises a material leveling screen ring plate (44), the material leveling screen ring plate (44) being coaxially connected to the crushing chamber (41), the material leveling screen ring plate (44) being coaxially rotatable relative to the crushing chamber (41), and a plurality of clearance holes (441) being formed on the material leveling screen ring plate (44); The plate surface of the material leveling screen ring plate (44) is inclined downward on the 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 communicated. A fixed pipe (421) is coaxially fixedly connected to the side of the impeller (42) facing the material leveling screen ring plate (44). The fixed 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).

2. The coal gangue screening and pulverizing processing system according to claim 1, 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 multiple and one-to-one 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). The control gear ring (51) is simultaneously engaged with all the control gears (52).

3. The coal gangue screening and pulverizing processing system according to claim 2, characterized in that: The fixed tube (421) is provided with a synchronization step (422), and a plurality of synchronization ridges (423) are fixedly connected to the synchronization step (422). The plurality of synchronization ridges (423) 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 coordination ridges (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 synchronization step (422) are opposite to each other, and the synchronization ridges (423) are located between adjacent coordination ridges (4432).

4. The coal gangue screening and pulverizing processing system according to claim 3, 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 vibration member for causing the material leveling screen ring plate (44) to shake relative to the mounting seat (54).

5. The coal gangue screening and pulverizing processing system according to claim 4, characterized in that: The vibrating member is a vibrating convex roller (424), which is rotatably connected to the end of the fixed tube (421). 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. A vibrating groove (444) is provided on the 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).

6. The coal gangue screening and pulverizing processing system according to claim 5, 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) abut, the abutting ring platform (411) and the stop pin (543) abut, and the stop pin (543) abuts against the material leveling screen ring plate (44).

7. A coal gangue screening and pulverizing processing system according to any one of claims 1-2, characterized in that: The machine further comprises a second elevator (3) and a finished product bin (31); the discharge end of the vibrating screen (2) is further 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