Impurity screening machine for mining coal

Abstract

The utility model relates to the technical field of coal mining, and discloses an impurity screening machine for coal mining, which comprises a workbench, a conveyor belt filter cartridge and a driving motor, the driving motor is controlled to enable the rotating shaft to rotate, coal is added into the filter cylinder, the coal is gathered inwards under the action of the threaded plate and the inclined plate and falls onto the rammer from the upper side of the filter cylinder, the coal is dispersed into small particles under the action of the rammer, and the small particles fall onto the conveying belt from the lower side of the filter cylinder. Impurities are discharged from the two sides of the filter cylinder by controlling a driving motor to rotate reversely, the screening and filtering effect of the coal is greatly improved, a limiting rod moves towards a rotating shaft through a buffer spring, then a steel brush is pressed to be tightly attached to the outer surface of the filter cylinder, and when the filter cylinder rotates, the steel brush continuously sweeps away coal particles blocked on the filter cylinder, so that the screening and filtering effect of the coal is improved. Baffles are arranged on the two sides of the workbench, it can be guaranteed that coal cannot splash all around, and the screening machine is more environmentally friendly.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically to an impurity screening machine used in coal mining. Background Technology

[0002] A coal impurity screening machine is a device used to screen and separate impurities from coal. It performs preliminary processing on coal mined from mines through screening and filtration, mainly to improve the quality of coal and reduce subsequent processing costs.

[0003] Chinese patent CN217774755U discloses an impurity screening machine suitable for coal mining. It includes an impurity screening box, a screening mechanism, and a disassembly mechanism. A coal inlet pipe is fixedly connected to the top of the impurity screening box, and mounting rods are fixedly connected to adjacent inner walls of the box. The screening mechanism includes rotating rods rotatably mounted on the top and bottom of the inner side of the screening box. A cam is fixedly sleeved on the outer wall of the rotating rod. A motor is fixedly mounted on the top of the screening box, and the motor's output shaft is fixedly connected to the rotating rod. The disassembly mechanism includes a sliding block slidably mounted on the outer wall of the mounting rod. A locking block is engaged with the top of the sliding block, and two sets of insert rods are slidably mounted on the outer walls of both the sliding block and the locking block. This invention can perform multi-stage screening of coal impurities and can also process and collect the impurities remaining after screening on the filter box.

[0004] The aforementioned screening machine has the effect of multi-stage screening of coal impurities. However, the existing device cannot adapt to coal particles of different sizes due to the fixed inner diameter of the filter holes. Larger coal particles may contain more impurities, resulting in low screening efficiency. Furthermore, the filter holes are easily blocked by coal, reducing the efficiency of coal screening. Therefore, there is a need to provide an impurity screening machine for coal mining. Utility Model Content

[0005] The purpose of this invention is to provide an impurity screening machine for coal mining, in order to solve the problems of existing screening machines being unable to adapt to coal particles of different sizes and the filter holes being easily clogged by coal.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an impurity screening machine for coal mining, comprising a workbench, a conveyor belt filter cylinder, and a drive motor, wherein a dispersing mechanism is provided between the filter cylinder and the drive motor; the dispersing mechanism includes several limiting rollers, which are rotatably installed between the workbench and the filter cylinder respectively; several inclined plates are fixedly installed inside the filter cylinder, and two threaded plates are fixedly installed inside the filter cylinder; a gear shaft is rotatably installed on the upper part of the workbench and meshing with the filter cylinder; a rubber belt is sleeved between the gear shaft and the output end of the drive motor; a rotating shaft is fixedly installed on the output end of the drive motor; several mounting seats are fixedly installed on the outside of the rotating shaft; and a hammer is rotatably installed on each of the mounting seats.

[0007] Preferably, the inner walls at both ends of the filter cartridge are sloped, and the threads of the two threaded plates are in opposite directions.

[0008] Preferably, a horizontal plate is fixedly installed at the front end of the inclined plate, and several conical iron blocks are fixedly installed at both ends of the hammer.

[0009] Preferably, the workbench is provided with an anti-blocking mechanism, which includes a support frame. The support frame is fixedly installed in the middle of the workbench, and baffles are fixedly installed on both sides of the support frame. Two limit rods are slidably installed side by side on both sides of the support frame. A buffer spring is fixedly installed between the limit rods and the support frame, and a steel brush is fixedly installed between the two limit rods.

[0010] Preferably, both baffles are fixedly mounted on the support frame at an angle, with one side of the baffle facing the pivot point.

[0011] Preferably, the steel brush is composed of several strip-shaped brush plates made of relatively soft material, and the steel brush faces the pivot position.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) This impurity screening machine for coal mining uses a drive motor to rotate the shaft, which in turn causes the hammer to move in a circular motion under centrifugal force. The drive motor also controls the rotation of the filter cylinder. When in use, coal is added to the filter cylinder. The coal will gather inward under the action of the threaded plate and inclined plate and fall from the top of the filter cylinder onto the hammer. The coal is dispersed into smaller particles under the action of the hammer, and the small particles fall from the bottom of the filter cylinder onto the conveyor belt. Impurities are discharged from both sides of the filter cylinder by controlling the drive motor to rotate in the opposite direction, which greatly improves the coal screening effect.

[0014] 2) This impurity screening machine for coal mining uses a buffer spring to move the limit rod towards the rotating shaft, thereby applying pressure to the steel brush to make it adhere tightly to the outer surface of the filter cylinder. When the filter cylinder rotates, the steel brush will continuously sweep away the coal particles that are blocked on the filter cylinder. Baffles are set on both sides of the worktable to ensure that coal does not splash around, making the screening machine more environmentally friendly. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an impurity screening machine for coal mining according to an embodiment of the present utility model.

[0016] Figure 2 This is a cross-sectional view of the filter cartridge in an embodiment of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the hammer in an embodiment of the present utility model;

[0018] Figure 4 This is a cross-sectional view of the anti-blocking mechanism in an embodiment of this utility model.

[0019] In the diagram: 1. Workbench; 2. Conveyor belt; 3. Filter cartridge; 4. Drive motor; 5. Dispersion mechanism; 501. Limiting roller; 502. Inclined plate; 503. Threaded plate; 504. Gear shaft; 505. Rubber belt; 506. Rotating shaft; 507. Mounting base; 508. Impact hammer; 6. Anti-blocking mechanism; 601. Support frame; 602. Baffle; 603. Limiting rod; 604. Buffer spring; 605. Steel brush. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Combination Figures 1-4A coal impurity screening machine for mining includes a workbench 1, a conveyor belt 2, a filter cylinder 3, and a drive motor 4. A dispersing mechanism 5 is provided between the filter cylinder 3 and the drive motor 4. The dispersing mechanism 5 includes several limiting rollers 501, which are rotatably installed between the workbench 1 and the filter cylinder 3. Several inclined plates 502 are fixedly installed inside the filter cylinder 3, and two threaded plates 503 are fixedly installed inside the filter cylinder 3. A gear shaft 504 is rotatably installed on the upper part of the workbench 1 and meshing with the filter cylinder 3. A rubber belt 505 is sleeved between the gear shaft 504 and the output end of the drive motor 4. A rotating shaft 506 is fixedly installed on the output end of the drive motor 4. Several mounting seats 507 are fixedly installed on the outside of the rotating shaft 506, and a hammer 508 is rotatably installed on each of the mounting seats 507.

[0023] See Figure 2 and Figure 3 Furthermore, it is found that the inner walls at both ends of the filter cylinder 3 are sloped, the threads of the two threaded plates 503 are opposite, a horizontal plate is fixedly installed at the front end of the inclined plate 502, and several conical iron blocks are fixedly installed at both ends of the hammer 508.

[0024] Specifically, the drive motor 4 is controlled to rotate the shaft 506. While the shaft 506 rotates, several hammers 508 on it will make circular motion under the action of centrifugal force. The output end of the drive motor 4 is connected to the gear shaft 504 through a rubber belt 505, so that the filter cylinder 3 is restricted to rotate on the worktable 1 by the limiting roller 501 under the action of the gear shaft 504. When in use, coal is added into the filter cylinder 3, so that the coal gathers towards the middle of the filter cylinder 3 under the action of the threaded plate 503, and falls towards the shaft 506 under the action of the inclined plate 502, so that it contacts the hammers 508, achieving the effect of dispersing large pieces of coal. After screening, the drive motor 4 is controlled to rotate in the opposite direction, and impurities will be discharged from both sides of the filter cylinder 3 under the action of the threaded plate 503.

[0025] Example 2

[0026] Combination Figure 1 and Figure 4 The workbench 1 is equipped with an anti-blocking mechanism 6, which includes a support frame 601. The support frame 601 is fixedly installed in the middle of the workbench 1, and baffles 602 are fixedly installed on both sides of the support frame 601. Two limit rods 603 are slidably installed side by side on both sides of the support frame 601. A buffer spring 604 is fixedly installed between the limit rods 603 and the support frame 601, and a steel brush 605 is fixedly installed between the two limit rods 603.

[0027] See Figure 4Furthermore, based on Embodiment 1, both baffles 602 are fixedly mounted on the support frame 601 at an incline, with one side of the baffle 602 facing the position of the rotating shaft 506. The steel brush 605 is composed of several strip-shaped brush plates with relatively soft material, and the steel brush 605 faces the position of the rotating shaft 506.

[0028] Specifically, the buffer spring 604 provides traction force to the limiting rod 603, causing the limiting rod 603 to move along the bracket towards the rotating shaft 506, thereby providing pressure to the steel brush 605, making its contact with the filter cartridge 3 tighter, and ensuring that the coal blockage on the filter cartridge 3 is cleared by the steel brush 605. The side of the baffle 602 facing the rotating shaft 506 can prevent coal from splashing out, and the steel brush 605 facing the rotating shaft 506 can ensure that the filter cartridge 3 maintains tight contact with the steel brush 605 when rotating in different directions.

[0029] In actual operation, the drive motor 4 is controlled to rotate the shaft 506. While the shaft 506 rotates, several hammers 508 on it will make circular motion under the action of centrifugal force. The output end of the drive motor 4 is connected to the gear shaft 504 through a rubber belt 505, so that the filter cylinder 3 is restricted to rotate on the worktable 1 by the limiting roller 501 under the action of the gear shaft 504. When in use, coal is added into the filter cylinder 3, so that the coal gathers towards the middle of the filter cylinder 3 under the action of the threaded plate 503, and falls towards the shaft 506 under the action of the inclined plate 502, so that it contacts the hammers 508, achieving the effect of dispersing large pieces of coal. After screening, the drive motor 4 is controlled to rotate in the opposite direction, and impurities will be discharged from both sides of the filter cylinder 3 under the action of the threaded plate 503.

[0030] The buffer spring 604 provides traction force to the limiting rod 603, causing the limiting rod 603 to move along the bracket towards the rotating shaft 506, thereby providing pressure to the steel brush 605, making its contact with the filter cartridge 3 tighter, and ensuring that the coal blockage on the filter cartridge 3 is cleared by the steel brush 605. The side of the baffle 602 facing the rotating shaft 506 can prevent coal from splashing out, and the steel brush 605 facing the rotating shaft 506 can ensure that the filter cartridge 3 maintains tight contact with the steel brush 605 when rotating in different directions.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dirt sifter for mining coal, comprising a workbench (1), a conveyor belt (2), a filter cylinder (3) and a driving motor (4), characterized in that: The filter cartridge (3) and the driving motor (4) are provided with a dispersion mechanism (5); The dispersion mechanism (5) comprises a plurality of limiting rollers (501), a plurality of limiting rollers (501) are rotatably installed between the workbench (1) and the filter cartridge (3), a plurality of inclined plates (502) are fixedly installed in the filter cartridge (3), two threaded plates (503) are fixedly installed in the filter cartridge (3), a gear shaft (504) is rotatably installed on the upper part of the workbench (1) and engaged with the filter cartridge (3), a rubber belt (505) is sleeved and installed between the gear shaft (504) and the output end of the driving motor (4), a rotating shaft (506) is fixedly installed on the output end of the driving motor (4), a plurality of mounting seats (507) are fixedly installed on the outer part of the rotating shaft (506), and a plurality of impact hammers (508) are rotatably installed on the mounting seats (507).

2. A dirt sifter for mining coal according to claim 1, characterized in that: The filter cartridge (3) is provided with a slope at the inner wall position of both ends, and the screw thread directions of the two threaded plates (503) are opposite.

3. A dirt sifter for mining coal as claimed in claim 1, wherein: The front end of the inclined plate (502) is fixedly installed with a horizontal plate, and the both ends of the impact hammer (508) are fixedly installed with a plurality of conical iron blocks.

4. A dirt sifter for mining coal as claimed in claim 1, wherein: The workbench (1) is provided with an anti-blocking mechanism (6), the anti-blocking mechanism (6) comprises a support frame (601), the support frame (601) is fixedly installed on the middle part of the workbench (1), the both sides of the support frame (601) are fixedly installed with baffles (602), the both sides of the support frame (601) are parallelly and slidably installed with two limiting rods (603), the limiting rods (603) and the support frame (601) are fixedly installed with buffer springs (604), and the two limiting rods (603) are fixedly installed with steel brushes (605).

5. A dirt screener for mining coal according to claim 4 wherein: The two baffles (602) are fixedly installed on the support frame (601) in an inclined manner, and one side of the baffle (602) faces the position of the rotating shaft (506).

6. A dirt screener for mining coal according to claim 5 wherein: The steel brush (605) is composed of a plurality of strip-shaped soft material brush plates, and the steel brush (605) faces the position of the rotating shaft (506).

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