Screening device for coal mining

Abstract

The utility model relates to the technical field of coal mine screening, in particular to a screening device for coal mining, which comprises a base, two symmetrical connecting rings are fixedly mounted on the upper surface of the base, the opposite surfaces of the two connecting rings are rotatably connected with a screening cylinder, screening holes are formed in the surface of the screening cylinder, and the screening holes comprise small filtering holes, medium filtering holes and large filtering holes. Discharging grooves are formed in the upper surface of the base and comprise a small material groove, a middle material groove and a large material groove, and a driving motor is fixedly connected to the right side surface of the right side connecting ring. By means of the screening holes, the driving motor, the transmission gear and rotation of the screening cylinder and under the screening and filtering effect of the screening holes in the surface of the screening cylinder, coal mines can be screened in small, medium and large stages, screened small materials, medium materials and large materials are discharged through the small material groove, the medium material groove and the large material groove respectively, and larger mineral materials flow out through the right end of the screening cylinder. Therefore, the device can achieve the effect of continuous and multi-stage coal mine screening, the screening effect is good, and meanwhile the screening efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine screening, in particular to a screening device used in coal mine mining. Background Art

[0002] Coal is the most important solid fuel and a type of combustible organic rock. It is formed by the natural coalification process over a long geological period of time, which is formed by the lush plants that grew in a certain geological period, gradually accumulated into thick layers in a suitable geological environment, and buried in the bottom of the water or in mud and sand.

[0003] In the prior art, a Chinese patent with publication number CN216965266U discloses a coal screening device for use in coal mining, which adopts the scheme of "including a screening box, a driving motor fixedly connected to one side of the screening box, a connecting shaft fixedly connected to the output end of the driving motor, a first gear fixedly connected to one end of the connecting shaft, a second gear meshingly connected to the first gear, a rotating shaft fixedly connected inside the second gear, a screening cylinder fixedly connected to one end of the rotating shaft, a plurality of evenly distributed screening holes are provided on the circumferential side of the screening cylinder, and a feed port is provided on one side of the screening cylinder". This scheme arranges a driving motor, and the rotation of the driving motor can drive the screening cylinder to rotate, so that ores and the like with a size larger than the screening holes can be retained in the screening cylinder, and coals of smaller sizes can be screened through the screening holes. A servo motor is arranged, and the rotation of the servo motor can drive the stirring rod to rotate, which can not only speed up the screening rate, but also reduce the possibility of ores and the like blocking the screening holes.

[0004] However, the above scheme still has some shortcomings. For example, the size of the screening holes on the screening cylinder in the above scheme is fixed, which results in that the coal can only be screened once and cannot achieve the effect of large, medium and small multi-level screening. At the same time, due to the setting of the screening cylinder and the feed port in the above scheme, the device can only screen a specific amount of coal intermittently and cannot perform screening work continuously, and its practicality is poor. In view of this, the utility model proposes a screening device for coal mining. Summary of the invention

[0005] The purpose of the utility model is to provide a screening device for coal mining, which has the advantage of continuous and multi-stage screening of coal mines, so as to solve the problem that the coal mines can only be screened once and large, medium and small multi-stage screening cannot be achieved in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A screening device for coal mining comprises a base, two symmetrical connecting rings are fixedly mounted on the upper surface of the base, a screening drum is rotatably connected to the opposite surfaces of the two connecting rings, screening holes are provided on the surface of the screening drum, the screening holes include small filter holes, medium filter holes and large filter holes, a discharge trough is provided on the upper surface of the base, the discharge trough includes small material trough, medium material trough and large material trough, a driving motor is fixedly connected to the right surface of the right connecting ring, a transmission gear is fixedly connected to the output shaft of the driving motor, a rack groove corresponding to the position of the transmission gear is provided on the surface of the screening drum, and a dust removal mechanism is provided on the left surface of the base.

[0008] As a preferred technical solution, the number of the small filter holes, the medium filter holes and the large filter holes are all several, and the several small filter holes, the medium filter holes and the large filter holes are all arranged in a circular array at equal distances on the surface of the screening cylinder.

[0009] As a preferred technical solution, the small material trough, the medium material trough and the large material trough correspond to the positions of the small filter holes, the medium filter holes and the large filter holes respectively.

[0010] As a preferred technical solution, the inner wall of the screening cylinder is fixedly connected with a plurality of vertical plates, which are arranged in a circular array on the inner wall of the screening cylinder.

[0011] As a preferred technical solution, the transmission gear and the inner wall of the rack groove are meshed with each other, and the drive motor is connected to the screening drum through the transmission gear and the rack groove.

[0012] As a preferred technical solution, the dust removal mechanism includes a filter box fixedly mounted on the left surface of the base, rectangular tubes are fixedly mounted on the front and back sides of the two connecting rings, dust suction holes are provided on the side of the two rectangular tubes adjacent to the screening cylinder, and connecting tubes extending to the interior of the filter box are provided on the upper surfaces of the two rectangular tubes.

[0013] As a preferred technical solution, an exhaust pipe is provided on the left surface of the filter box, and one end of the exhaust pipe away from the filter box is connected to an external exhaust device.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model can screen the coal in small, medium and large levels through the screening holes, the driving motor and the transmission gear, and the rotation of the screening drum cooperates with the screening effect of the screening holes on its surface. The screened small, medium and large materials are discharged through the small material trough, the medium material trough and the large material trough respectively, and the larger mineral materials flow out through the right end of the screening drum, so that the device can achieve the effect of continuous and multi-level screening of coal, and the screening effect is good and the screening efficiency is high.

[0016] The utility model uses a dust removal mechanism and an external exhaust device to generate a suction force in the rectangular tube through the exhaust pipe, the filter box and the connecting pipe. After the suction force is generated in the rectangular tube, the dust generated when the screening cylinder screens the coal mine is sucked into the filter box for filtering, so that the device can achieve the dust collection effect and avoid the occurrence of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a front view structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the rear cross-sectional structure of a rectangular tube of the utility model;

[0020] Figure 3 It is a schematic diagram of the front section structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the top-sectional structure of a rectangular tube of the utility model;

[0022] Figure 5 For the utility model Figure 4 Enlarged structural diagram at A in the middle.

[0023] In the figure: 1. base; 2. connecting ring; 3. screening cylinder; 4. screening hole; 401. small filter hole; 402. medium filter hole; 403. large filter hole; 5. discharge trough; 501. small trough; 502. medium trough; 503. large trough; 6. driving motor; 7. transmission gear; 8. rack groove; 9. vertical plate; 10. filter box; 11. rectangular tube; 12. dust suction hole; 13. connecting tube; 14. exhaust duct. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] According to the attached Figure 1-5 As shown, an embodiment of the utility model provides a screening device for coal mining, including a base 1, two symmetrical connecting rings 2 are fixedly installed on the upper surface of the base 1, and the opposite surfaces of the two connecting rings 2 are rotatably connected with a screening cylinder 3, and the surface of the screening cylinder 3 is provided with screening holes 4, and the screening holes 4 include small filter holes 401, medium filter holes 402 and large filter holes 403. The number of small filter holes 401, medium filter holes 402 and large filter holes 403 is several, and the several small filter holes 401, medium filter holes 402 and large filter holes 403 are equidistantly arranged on the surface of the screening cylinder 3 in a circular array.

[0028] The inner wall of the screening drum 3 is fixedly connected with a vertical plate 9. There are a plurality of vertical plates 9, which are arranged in a circular array on the inner wall of the screening drum 3. By setting the vertical plates 9, the screening drum 3 can be driven by the vertical plates 9 to stir the coal in the screening drum 3 when it rotates, thereby stirring the coal so that the coal can be fully screened through the screening holes 4.

[0029] A discharge trough 5 is provided on the upper surface of the base 1, and the discharge trough 5 includes a small trough 501, a medium trough 502 and a large trough 503, and the small trough 501, the medium trough 502 and the large trough 503 correspond to the positions of the small filter hole 401, the medium filter hole 402 and the large filter hole 403 respectively. A drive motor 6 is fixedly connected to the right surface of the right connecting ring 2, and a transmission gear 7 is fixedly connected to the output shaft of the drive motor 6. A rack groove 8 corresponding to the position of the transmission gear 7 is provided on the surface of the screening drum 3, and the transmission gear 7 is meshed with the inner wall of the rack groove 8. The drive motor 6 is connected to the screening drum 3 through the transmission gear 7 and the rack groove 8. A dust removal mechanism is provided on the left surface of the base 1.

[0030] The dust removal mechanism includes a filter box 10 fixedly mounted on the left surface of the base 1, and rectangular tubes 11 are fixedly mounted on the front and back sides of the two connecting rings 2. Dust suction holes 12 are provided on the side of the two rectangular tubes 11 adjacent to the screening cylinder 3. The number of dust suction holes 12 is several, and the several dust suction holes 12 are equidistantly arranged on the surface of the rectangular tubes 11. The upper surfaces of the two rectangular tubes 11 are provided with connecting tubes 13 extending to the inside of the filter box 10. An exhaust pipe 14 is provided on the left surface of the filter box 10, and the end of the exhaust pipe 14 away from the filter box 10 is connected to an external exhaust device.

[0031] When a screening device for coal mining of the utility model is used, the coal to be screened is sent into the screening drum 3, and the operation of the driving motor 6 drives the screening drum 3 to rotate through the transmission gear 7 and the rack groove 8. The rotation of the screening drum 3 cooperates with the screening effect of the screening holes 4 on its surface to screen the coal in small, medium and large levels. The screened small materials, medium materials and large materials are discharged through the small material trough 501, the medium material trough 502 and the large material trough 503 respectively, and the larger mineral materials flow out through the right end of the screening drum 3, so that the device can achieve the effect of continuous and multi-level screening of coal. The operation of the external exhaust device causes the rectangular tube 11 to generate suction force through the exhaust pipe 14, the filter box 10 and the connecting pipe 13. After the rectangular tube 11 generates suction force, the dust generated when the screening drum 3 screens the coal is sucked into the filter box 10 for filtration, so that the device can achieve the effect of dust collection.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A screening device for coal mining, characterized in that: The invention comprises a base (1), wherein two symmetrical connecting rings (2) are fixedly mounted on the upper surface of the base (1), and a screening cylinder (3) is rotatably connected to the opposite surfaces of the two connecting rings (2). A screening hole (4) is provided on the surface of the screening cylinder (3), and the screening hole (4) comprises a small filtering hole (401), a medium filtering hole (402) and a large filtering hole (403). A material discharge trough (5) is provided on the upper surface of the base (1), and the material discharge trough (5) comprises a small material trough (501), a medium material trough (502) and a large material trough (503). A driving motor (6) is fixedly connected to the right side surface of the right connecting ring (2), and a transmission gear (7) is fixedly connected to the output shaft of the driving motor (6). A rack groove (8) corresponding to the position of the transmission gear (7) is provided on the surface of the screening cylinder (3), and a dust removal mechanism is provided on the left side surface of the base (1).

2. A screening device for coal mining according to claim 1, characterized in that: The number of the small filter holes (401), the medium filter holes (402) and the large filter holes (403) is multiple, and the multiple small filter holes (401), the medium filter holes (402) and the large filter holes (403) are arranged in a circular array at equal intervals on the surface of the screening cylinder (3).

3. A screening device for coal mining according to claim 1, characterized in that: The small material trough (501), the medium material trough (502) and the large material trough (503) correspond to the positions of the small filter hole (401), the medium filter hole (402) and the large filter hole (403), respectively.

4. A screening device for coal mining according to claim 1, characterized in that: The inner wall of the screening cylinder (3) is fixedly connected with a vertical plate (9), the number of the vertical plates (9) is a plurality, and the plurality of vertical plates (9) are arranged in a circular array on the inner wall of the screening cylinder (3).

5. A screening device for coal mining according to claim 1, characterized in that: The transmission gear (7) and the inner wall of the rack groove (8) are meshed with each other, and the drive motor (6) is connected to the screening drum (3) through the transmission gear (7) and the rack groove (8).

6. A screening device for coal mining according to claim 1, characterized in that: The dust removal mechanism comprises a filter box (10) fixedly mounted on the left side surface of the base (1); rectangular tubes (11) are fixedly mounted on the front and back sides of the two connecting rings (2); dust suction holes (12) are provided on one side of the two rectangular tubes (11) adjacent to the screening cylinder (3); and connecting tubes (13) extending to the interior of the filter box (10) are provided on the upper surfaces of the two rectangular tubes (11).

7. A screening device for coal mining according to claim 6, characterized in that: An exhaust pipe (14) is provided on the left side surface of the filter box (10), and one end of the exhaust pipe (14) away from the filter box (10) is connected to an external exhaust device.

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