Granularity multi-stage screening device for coal samples

Abstract

The utility model discloses a coal sample granularity multistage screening device, which relates to the technical field of material screening equipment and comprises a screening cylinder, a support shaft, a support disc, an arc-shaped strip and screening holes. The supporting shaft drives the supporting disc to rotate, the supporting disc drives a coal sample on the top of the supporting disc to conduct centrifugal diffusion movement in the rotating movement process, the coal sample can make contact with the screening holes in the movement process, and the coal sample penetrates through the screening holes to fall down; the coal samples make contact with the screening holes in the surface of the supporting disc in a centrifugal diffusion movement mode, the contact frequency of the coal samples and the screening holes can be effectively increased, the coal samples can make contact with the screening holes at different angles, and the screening treatment effect on the coal samples can be effectively improved; the coal samples can be returned after impacting the inner wall of the screening cylinder in a centrifugal diffusion mode and fall onto the supporting disc again to be subjected to centrifugal diffusion treatment, and the screening treatment effect on the coal samples can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of material screening equipment technology, specifically a multi-stage particle size screening device for coal samples. Background Technology

[0002] Collect coal samples and process them appropriately, such as grinding and sieving, to ensure that the samples are representative and suitable for spectral analysis. Reduce the coal to a particle size of 3 to 6 mm and place it in a sample preparation machine for a certain period of time before use.

[0003] Patent (CN221537231U) discloses a coal screening device, including a housing, a screen plate, two telescopic components, a mounting frame, a disturbance component, and a striking component. The housing has an upward opening, and the side walls of the housing are respectively provided with an inlet and an outlet, with the inlet located above the outlet. The screen plate is disposed inside the housing and between the inlet and outlet for screening coal. The two telescopic components are symmetrically disposed on both sides of the housing and extend upward to the top of the housing. The mounting frame is connected to the upper ends of the two telescopic components. The disturbance component is rotatably connected to the lower part of the mounting frame and is used to disturb the coal on the screen plate. The striking component is disposed inside the housing and below the screen plate for striking the screen plate to allow coal to pass through it. The telescopic components can drive the disturbance component downward to press and crush the coal on the screen plate. The coal screening device provided by this utility model avoids screen plate clogging by striking the screen plate with the striking component, improving work efficiency and saving manpower.

[0004] The coal screening device described in the aforementioned patent document can only perform primary screening of coal samples, and requires tapping the sieve plate, which is easily damaged. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage particle size screening device for coal samples to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multi-stage particle size screening device for coal samples, including a screening cylinder, a vertically rotatably connected support shaft inside the screening cylinder, a plurality of support disks horizontally sleeved from top to bottom on the outer wall of the support shaft, a plurality of arc-shaped strips on the top of the support disks, a plurality of screening holes on the top of the support disks, the arc-shaped strips being distributed in a vortex shape, the screening holes being evenly distributed on the outer side of the arc-shaped strips, and the width of the arc-shaped strips near the support shaft end being smaller than the width of the other end.

[0007] Furthermore, a servo motor is provided at the top of the screening cylinder, and the output shaft of the servo motor is fixedly connected to the top of the support shaft through a reducer.

[0008] Furthermore, a feed pipe is provided on one side of the top of the screening cylinder, a discharge port is provided at the bottom of the screening cylinder, and a spiral conveyor frame is provided below the discharge port at the bottom of the screening cylinder.

[0009] Furthermore, the outer wall of the screening cylinder is provided with a discharge pipe outside the support plate, and the discharge pipe is provided with a sealing component that extends into the interior of the screening cylinder. The discharge pipe is inclined downward on the outer wall of the screening cylinder.

[0010] Furthermore, three support disks are provided, all three having the same outer diameter, and the outer wall of each support disk is in contact with the inner wall of the screening cylinder. The inner diameter of the screening holes at the top of the three support disks decreases sequentially from top to bottom.

[0011] Furthermore, three discharge pipes are provided, and the three discharge pipes are respectively located at three positions on the circumferential direction of the outer wall of the screening cylinder.

[0012] Furthermore, both sides of the outer wall of the arc-shaped strip are concave arc-shaped structures, and the width of the top of the arc-shaped strip is smaller than the width of the bottom of the arc-shaped strip.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] 1. This utility model incorporates a screening cylinder, a support shaft, a support disk, an arc-shaped strip, and screening holes. The support shaft drives the support disk to rotate, causing the coal sample on its top to undergo centrifugal diffusion. During this centrifugal diffusion, the coal sample can contact the screening holes, passing through them and falling downwards. This centrifugal diffusion effectively increases the number of contacts between the coal sample and the screening holes, allowing the sample to contact the holes at different angles, thus improving the screening effect. After impacting the inner wall of the screening cylinder during centrifugal diffusion, the coal sample can return to the support disk for further centrifugal diffusion, further enhancing the screening effect.

[0015] 2. In this utility model, after the coal sample screening process is completed, the sealing component is opened, the discharge pipe is in the open state, the support shaft is adjusted to rotate, the support shaft drives the support plate to rotate again, and the coal sample at the top of the support plate that has not entered the next layer undergoes centrifugal diffusion at the top of the support plate. During the centrifugal diffusion process, the coal sample can enter the discharge pipe and be discharged from the outlet of the discharge pipe; after being guided by the arc strip, the coal sample presents a vortex strip diffusion. As the support plate rotates, the vortex strip of the coal sample can continuously contact the discharge pipe, conveying the coal sample in strip shape to the discharge pipe for discharge. This can effectively discharge all the coal sample at the top of the support plate, which is convenient for collecting and processing coal samples of different particle sizes separately. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the support shaft and support disc of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the support plate of this utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the structure of the support plate of this utility model. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the structure of the support plate of this utility model. Figure 3 ;

[0022] In the diagram: 1. Screening cylinder; 101. Servo motor; 102. Reducer; 103. Feed pipe; 104. Discharge pipe; 2. Support shaft; 201. Support plate; 202. Arc strip; 203. Screening hole; 3. Screw conveyor frame. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-5This utility model provides a technical solution: a multi-stage particle size screening device for coal samples, including a screening cylinder 1. A support shaft 2 is vertically and rotatably connected inside the screening cylinder 1. Several support disks 201 are horizontally mounted on the outer wall of the support shaft 2 from top to bottom. Several arc-shaped strips 202 are provided at the top of each support disk 201, and several screening holes 203 are opened at the top of each support disk 201. The arc-shaped strips 202 are distributed in a vortex shape, and the screening holes 203 are evenly distributed on the outer side of the arc-shaped strips 202. The width of one end of the arc-shaped strip 202 near the support shaft 2 is smaller than the width of the other end. A discharge pipe 104 is provided on the outer wall of the screening cylinder 1 outside the support disks 201. A sealing component is provided on the discharge pipe 104, extending into the interior of the screening cylinder 1. The discharge pipe 104 is inclined downwards on the outer wall of the screening cylinder 1. Both sides of the outer wall of the arc-shaped strips 202 have concave arc-shaped structures, and the width of the top of the arc-shaped strip 202 is smaller than the width of the bottom of the arc-shaped strip 202.

[0025] In one embodiment, a servo motor 101 is provided at the top of the screening cylinder 1. The output shaft of the servo motor 101 is fixedly connected to the top of the support shaft 2 through a reducer 102. The servo motor 101 can drive the support shaft 2 to rotate through the reducer 102, and the support shaft 2 drives the support disk 201 to rotate.

[0026] In one embodiment, a feed pipe 103 is provided on one side of the top of the screening cylinder 1, and a discharge port is provided at the bottom of the screening cylinder 1. A spiral conveyor frame 3 is provided below the discharge port at the bottom of the screening cylinder 1. The feed pipe 103 is used to feed the coal to be screened into the screening cylinder 1. The discharge port is used to discharge the smallest coal sample at the bottom layer of the screening cylinder 1. The spiral conveyor frame 3 is used to transport the coal sample, which facilitates the receiving and processing of the coal sample.

[0027] In one embodiment, three support disks 201 are provided, all with equal outer diameters. The outer walls of the three support disks 201 are in close contact with the inner wall of the screening cylinder 1, ensuring that coal does not fall through the gap between the outer wall of the support disk 201 and the inner wall of the screening cylinder 1 during the rotation of the support disks 201, thus ensuring the screening effect of the coal. The inner diameter of the screening holes 203 at the top of the three support disks 201 decreases from top to bottom, so that when the three support disks 201 are working, the screening holes 203 can perform triple screening of the coal, enabling screening of coal at four particle sizes.

[0028] In one embodiment, three discharge pipes 104 are provided, and the three discharge pipes 104 are respectively located at three positions in the circumferential direction of the outer wall of the screening cylinder 1. Each discharge pipe 104 corresponds to a support plate 201, and the three discharge pipes 104 are respectively located at three positions in the circumferential direction of the outer wall of the screening cylinder 1. This makes it convenient for the coal sample to be received at three positions in the circumferential direction of the outer side of the screening cylinder 1 during the outward conveying of the coal sample from the discharge pipes 104, and avoids mutual interference between the coal samples during the discharge process.

[0029] The working principle of this utility model:

[0030] Refer to the instruction manual appendix Figures 1-5 This utility model is designed with a screening cylinder 1, a support shaft 2, a support plate 201, an arc-shaped strip 202, and a screening hole 203. The screening cylinder 1 provides screening space for coal. The support shaft 2 provides fixed support for the support plate 201. When the support shaft 2 rotates, the support plate 201 can rotate with the support shaft 2. The arc-shaped strip 202 limits and isolates the coal at the top of the support plate 201. The screening hole 203 provides a screening and falling channel for the coal. The coal moves downward through the screening hole 203, thus completing the screening process of the coal.

[0031] In use, the coal sample to be screened is fed into the top of the inner side of the screening cylinder 1. The coal sample falls onto the top of the uppermost support plate 201. The arc-shaped strip 202 limits, guides, and separates the coal sample at the top of the support plate 201. The support shaft 2 is rotated, causing the support plate 201 to rotate. During the rotation of the support plate 201, the coal sample on top of it undergoes centrifugal diffusion. During this centrifugal diffusion process at the top of the support plate 201, the coal sample can interact with the screening holes 2. 03 Contact: The coal sample falls downward through the screening hole 203. The coal sample contacts the screening hole 203 on the surface of the support plate 201 in a centrifugal diffusion motion, which can effectively increase the number of contactes between the coal sample and the screening hole 203, allowing the coal sample to contact the screening hole 203 at different angles, thus effectively improving the screening effect of the coal sample. After the coal sample impacts the inner wall of the screening cylinder 1 in a centrifugal diffusion process, it can be returned to the support plate 201 for centrifugal diffusion again, which can effectively improve the screening effect of the coal sample.

[0032] When the coal sample undergoes centrifugal diffusion at the top of the support plate 201, the arc-shaped strips 202 can limit, guide, and separate the coal sample. The arc-shaped strips 202 are distributed in a vortex shape, effectively defining the shape of the limiting, guiding, and separating process, ensuring that the coal sample diffuses in a vortex-like pattern after being guided by the arc-shaped strips 202. The width of the arc-shaped strips 202 near the support shaft 2 is set to be smaller than the width of the other end, ensuring that the coal sample remains within the support plate 201 during its guided movement along the arc-shaped strips 202. The coal sample at the top center can quickly diffuse outwards, avoiding the fact that the arc-shaped strips 202 are too densely distributed inside the support plate 201, which would prevent the coal sample from diffusing outwards normally. The outer walls of the arc-shaped strips 202 are designed with concave structures on both sides, so that the coal sample can move upwards along the outer wall of the arc-shaped strips 202 during its movement. After being guided by the outer wall of the arc-shaped strips 202, the coal sample can separate from the arc-shaped strips 202 and then fall back to the top of the support plate 201 for re-screening.

[0033] The discharge pipe 104 is used to guide the coal sample on the support plate 201 from the outside of the support plate 201. The sealing component is used to seal the discharge pipe 104. During normal screening of the coal sample, the sealing component seals the discharge pipe 104 to ensure that the coal sample cannot be discharged from the discharge pipe 104 when the support plate 201 is performing normal screening. After the coal sample screening is completed, the sealing component is opened, the discharge pipe 104 is in the open state, and the support shaft 2 is adjusted to rotate. The support shaft 2 drives the support plate 201 to rotate again. The coal sample at the top of the support plate 201 that has not entered the next layer is discharged from the support plate 201. Centrifugal diffusion occurs at the top, allowing the coal sample to enter the discharge pipe 104 and exit from its outlet. Since a simple rotating support plate 201 cannot transport all the coal sample into the discharge pipe 104, an arc-shaped bar 202 is designed. After being guided by the arc-shaped bar 202, the coal sample diffuses in a vortex pattern. As the support plate 201 rotates, the vortex pattern continuously contacts the discharge pipe 104, transporting the coal sample in a strip shape to the discharge pipe 104 for discharge. This effectively removes all the coal sample from the top of the support plate 201, facilitating the separate collection and processing of coal samples of different particle sizes.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage particle size screening device for coal samples, comprising a screening cylinder (1), characterized in that: The screening cylinder (1) is vertically connected to a rotating support shaft (2). The outer wall of the support shaft (2) is horizontally fitted with several support discs (201) from top to bottom. The top of the support disc (201) is provided with several arc-shaped strips (202). The top of the support disc (201) is provided with several screening holes (203). The arc-shaped strips (202) are distributed in a vortex shape. The screening holes (203) are evenly arranged on the outside of the arc-shaped strips (202). The width of the arc-shaped strips (202) near the support shaft (2) is smaller than the width of the other end.

2. The multi-stage particle size screening device for coal samples according to claim 1, characterized in that: The top of the screening cylinder (1) is equipped with a servo motor (101), and the output shaft of the servo motor (101) is fixedly connected to the top of the support shaft (2) through a reducer (102).

3. The multi-stage particle size screening device for coal samples according to claim 1, characterized in that: The screening cylinder (1) has a feed pipe (103) on one side of the top, a discharge port at the bottom, and a spiral conveyor frame (3) below the discharge port at the bottom.

4. The multi-stage particle size screening device for coal samples according to claim 1, characterized in that: The outer wall of the screening cylinder (1) is provided with a discharge pipe (104) outside the support plate (201). The discharge pipe (104) is provided with a sealing component, which extends into the interior of the screening cylinder (1). The discharge pipe (104) is inclined downward on the outer wall of the screening cylinder (1).

5. The multi-stage particle size screening device for coal samples according to claim 4, characterized in that: Three support disks (201) are provided. The three support disks (201) have the same outer diameter, and the outer wall of the support disk (201) is in contact with the inner wall of the screening cylinder (1). The inner diameter of the screening hole (203) at the top of the three support disks (201) decreases from top to bottom.

6. The multi-stage particle size screening device for coal samples according to claim 5, characterized in that: Three discharge pipes (104) are provided, and the three discharge pipes (104) are respectively located at three positions on the outer circumferential direction of the screening cylinder (1).

7. The multi-stage particle size screening device for coal samples according to claim 1, characterized in that: Both sides of the outer wall of the arc-shaped strip (202) are concave arc-shaped structures, and the width of the top of the arc-shaped strip (202) is smaller than the width of the bottom of the arc-shaped strip (202).

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