An ore screening device for coal mining

Abstract

The utility model discloses a kind of ore screening equipment for coal mining, including base, base is the hollow cylinder of opening upwards, the elastic connection of base upper surface has receiving tray, receiving tray is the hollow cylinder of opening upwards, receiving tray side elevation is provided with discharge port one, discharge port one is connected with guide chute, vibration mechanism is arranged in base interior, vibration mechanism is connected with receiving tray, receiving tray upper surface is stacked with several sieve barrels by detachable connection mode, several sieve barrels are detachably connected, sieve barrel is circular tubular, sieve barrel side elevation is provided with discharge port two, discharge port two is connected with guide chute, sieve barrel is connected with screening element, screening element is equipped with sieve hole, the aperture of sieve hole of upper screening element is greater than the aperture of sieve hole of lower screening element. By stacking several sieve barrels, and being equipped with screening element of different sieve hole aperture, so as to realize the purpose that a screening operation can separate multiple particle size grade ores.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mining equipment, and in particular relates to an ore screening device used in coal mining. Background Technology

[0002] As one of my country's main energy sources, coal requires screening and grading during its mining process to remove impurities such as gangue and mud, and to classify it according to particle size to meet the needs of different fields such as coking, power generation, and chemical industry.

[0003] Traditional ore screening equipment mostly uses a single screen or inclined screen plate. However, a single screen or inclined screen plate can only achieve one separation, namely the "undersize ore" that passes through the screen holes and the "oversize ore" that remains on the screen surface. To separate ores of multiple particle sizes, screens with different screen hole sizes must be used and multiple single screenings must be performed. This results in a cumbersome process, increased time consumption, reduced ore screening efficiency, and increased ore mining costs. Therefore, there is a need for ore screening equipment that can separate multiple particle sizes in a single screening operation. Utility Model Content

[0004] The purpose of this invention is to separate ores of multiple particle sizes in a single screening operation by stacking several screen barrels, each equipped with screening elements of different screen apertures. This addresses the problem in the background art where traditional ore screening equipment often uses a single screen or inclined screen plate. To separate ores of multiple particle sizes, screens with different aperture specifications must be used, and multiple single screening operations must be performed, resulting in cumbersome procedures, increased time consumption, and reduced ore screening efficiency.

[0005] The specific technical solution of this utility model is as follows: A coal mine ore screening device includes a base, which is a hollow cylinder with its opening facing upwards. A receiving tray is elastically connected to the upper surface of the base. The receiving tray is also a hollow cylinder with its opening facing upwards. A discharge port is provided on the side of the receiving tray, and a guide chute is connected to the discharge port. A vibration mechanism is provided inside the base and is connected to the receiving tray. Several screen barrels are stacked on the upper surface of the receiving tray in a detachable manner. The screen barrels are detachably connected to each other. The screen barrels are cylindrical. A second discharge port is provided on the side of the screen barrel, and a guide chute is connected to the second discharge port. Screening elements are connected inside the screen barrels. The screening elements have screen holes, and the screen hole diameter of the upper screening element is larger than that of the lower screening element.

[0006] Furthermore, the screening element is in the shape of a circular plate, and its circumferential surface is in contact with the inner wall of the screen barrel. A limiting element is provided in the lower part of the inner wall of the screen barrel. The limiting element is in the shape of a ring, and its inner diameter is smaller than the outer diameter of the screening element.

[0007] Furthermore, the inner wall of the screen barrel is provided with several linear grooves in an annular array. The top opening of the linear groove is located on the upper surface of the screen barrel, and the bottom opening of the linear groove is located on the upper surface of the limiting member. The circumferential surface of the screening member is provided with several positioning sliders in an annular array, and the positioning sliders are adapted to the linear grooves.

[0008] Furthermore, a positioning rod is slidably connected inside the linear chute, and the sum of the height of the positioning rod and the thickness of the screening element is equal to the length of the linear chute.

[0009] Furthermore, the linear slide rail has vertically oriented limiting slide rails on both sides, and the positioning rod has limiting sliders on both sides that are adapted to the limiting slide rails.

[0010] Furthermore, the sieve barrel has three screens, and the screening components include a primary screen, a secondary screen, and a tertiary screen. The primary screen has primary screen holes and is connected to the sieve barrel located at the top. The secondary screen has secondary screen holes and is connected to the sieve barrel located in the middle. The tertiary screen has tertiary screen holes and is connected to the sieve barrel located at the bottom. The mesh size of the primary screen holes is smaller than that of the secondary screen holes, and the mesh size of the secondary screen holes is smaller than that of the tertiary screen holes.

[0011] Furthermore, the top of the screen barrel is provided with flange one, the bottom of the screen barrel is provided with flange two, flange one and flange two are compatible, and the top of the receiving tray is provided with flange three, which is compatible with flange two.

[0012] Furthermore, the vibration mechanism includes a motor, an eccentric block is fixedly connected to the motor drive shaft, the upper surface of the eccentric block is provided with a shaft hole, and a drive rod is fixedly connected to the lower surface of the receiving tray, the drive rod being adapted to the shaft hole.

[0013] Furthermore, several springs are circumferentially arrayed on the upper surface of the base, and these springs are fixedly connected to the lower surface of the receiving tray.

[0014] Furthermore, the upper surface of the base is provided with several guide rods in a circumferential array, and the lower surface of the receiving tray is provided with several guide rods in a circumferential array. Springs are sleeved on the guide rods and the guide rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The ore is placed into the top screen barrel, the motor is started, and the motor rotation drives the eccentric block to rotate. The eccentric block, in turn, causes the receiving tray to vibrate. The receiving tray is connected to the screen barrel, thereby causing several screen barrels to vibrate, which in turn vibrates the ore. Since the screening elements in the several screen barrels have gradually smaller screen apertures from top to bottom, different particle size grades of ore can be screened through several screen barrels. This achieves the goal of separating multiple particle size grades of ore in a single screening operation, simplifies the multi-stage ore screening process, reduces the time spent on multi-stage ore screening, improves ore screening efficiency, and saves ore mining costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is an exploded view of the assembly of the base, receiving tray, and screen barrel in an embodiment of this utility model; Figure 3 This is a three-dimensional structural diagram of the base in an embodiment of the present utility model; Figure 4 This is a three-dimensional schematic diagram of the bottom structure of the receiving tray in an embodiment of this utility model; Figure 5 This is an exploded view of the assembly of the sieve barrel, sieve components, and positioning rod in an embodiment of this utility model; Figure label: 1. Base; 11. Spring; 12. Guide rod one; 2. Vibration mechanism; 21. Motor; 22. Eccentric block; 221. Shaft hole; 3. Receiving tray; 31. Flange 3; 32. Drive rod; 33. Discharge port 1; 34. Guide rod 2; 4. Screen barrel; 41. Limiting component; 42. Linear chute; 421. Limiting chute; 43. Flange 1; 44. Flange 2; 45. Discharge port 2; 5. Positioning slider; 51. Primary screen; 511. Primary screen aperture; 52. Secondary screen; 521. Secondary screen aperture; 53. Tertiary screen; 531. Tertiary screen aperture; 6. Positioning rod; 61. Limiting slider; 7. Feed chute. Detailed Implementation

[0017] To better understand the purpose, structure, and function of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," and "bottom," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] See Figures 1 to 5This embodiment discloses an ore screening device used in coal mining, including a base 1. The base 1 is a hollow cylinder with the opening facing upward. It can be further optimized by providing a mounting base on the lower surface of the base 1. Several mounting holes are distributed in a circular array on the mounting base. The base 1 is fixed to the ground by the cooperation of expansion bolts with the mounting holes, thereby increasing the stability of the ore screening device. A receiving tray 3 is elastically connected to the upper surface of the base 1. The receiving tray 3 is a hollow cylinder with its opening facing upwards. A discharge port 33 is provided on the side of the receiving tray 3, and a guide trough 7 is connected to the discharge port 33. The ore in the receiving tray 3, under vibration, can enter the guide trough 7 through the discharge port 33 and fall onto the receiving device placed at the bottom of the guide trough 7. Further optimization is possible by providing a downward tilt at the end of the guide trough 7 to facilitate the ore sliding out of the guide trough 7 under gravity. A vibration mechanism 2 is installed inside the base 1, and the vibration mechanism 2 is connected to the receiving tray 3. Several screen barrels 4 are stacked on the upper surface of the receiving tray 3 in a detachable manner. The screen barrels 4 are detachably connected to each other. The screen barrels 4 are cylindrical, and a discharge port 45 is provided on the side of the screen barrel 4, which is connected to the guide trough 7. The cylindrical screen barrels 4 can withstand the high-frequency impact and friction of the ore during vibration, and are less prone to wall dents or weld defects after long-term use. The cracks in the seams improve the structural strength and service life of the screen barrel 4. The cylindrical inner wall is smooth and has no right-angle transitions, resulting in low flow resistance of the ore material inside the screen barrel 4. It can roll along the curved surface under vibration to the discharge port 45. When the vibration mechanism 2 vibrates, it transmits the vibration effect to the receiving plate 3. Since the receiving plate 3 is elastically connected to the base 1, the receiving plate 3 will vibrate and transmit the vibration effect to the screen barrel 4. A screening element is connected inside the screen barrel 4. Each screening element has a screen hole. The ore is screened through the screen hole. The screen hole diameter of the screening element in the upper screen barrel 4 is larger than that of the screening element in the lower screen barrel 4. Several screen barrels 4 are stacked, so the screen hole diameter of the screening element gradually decreases from top to bottom, and the particle size of the screened ore material becomes smaller and smaller. Finally, the ore powder and soil fall into the receiving plate 3, achieving the purpose of separating multiple particle size grades of ore in one screening operation.

[0020] The screening element is in the shape of a circular plate. The circumferential surface of the screening element is in contact with the inner wall of the screen barrel 4 to prevent the ore material from leaking through the gap. A limiting element 41 is provided in the lower part of the inner wall of the screen barrel 4. The limiting element 41 is in the shape of a ring. The inner diameter of the limiting element 41 is smaller than the outer diameter of the screening element. After the screening element is placed in the screen barrel 4, the limiting element 41 plays a supporting role for the screening element.

[0021] The inner wall of the screen barrel 4 is provided with several linear grooves 42 arranged in a ring. The top opening of the linear groove 42 is located on the upper surface of the screen barrel 4, and the bottom opening of the linear groove 42 is located on the upper surface of the limiting member 41. The linear groove 42 is perpendicular to the upper surface of the limiting member 41. The circumferential surface of the screening element is provided with several positioning sliders 5 arranged in a ring. The positioning sliders 5 are adapted to the linear grooves 42. The screening element achieves sliding connection with the screen barrel 4 through the sliding cooperation between the positioning sliders 5 and the linear grooves 42.

[0022] A positioning rod 6 is slidably connected inside the linear chute 42. The sum of the height of the positioning rod 6 and the thickness of the screening element is equal to the length of the linear chute 42. The screening element is placed into the screen barrel 4, and then the positioning rod 6 is placed into the linear chute 42. At this time, after another screen barrel 4 is installed on the top of the screen barrel 4, the lower surface of the top screen barrel 4 can abut against the positioning rod 6, thereby fixing the screening element located in the lower screen barrel 4 and increasing the stability of the screening element during vibration.

[0023] The linear slide 42 has vertically opposite limiting slides 421 on both sides of the vertical surface. The positioning rod 6 has limiting sliders 61 on both sides of the vertical surface that are adapted to the limiting slides 421. When the positioning rod 6 is inserted into the linear slide 42, the limiting sliders 61 and the limiting slides 421 cooperate to prevent the positioning rod 6 from falling out of the linear slide 42.

[0024] The sieve barrel 4 has three screens, and the screening components include a primary screen 51, a secondary screen 52, and a tertiary screen 53. The primary screen 51 has primary screen holes 511 and is connected to the sieve barrel 4 located at the top. The secondary screen 52 has secondary screen holes 521 and is connected to the sieve barrel 4 located in the middle. The tertiary screen 53 has tertiary screen holes 531 and is connected to the sieve barrel 4 located at the bottom. The mesh size of the primary screen hole 511 is smaller than that of the secondary screen hole 521, and the mesh size of the secondary screen hole 521 is smaller than that of the tertiary screen hole 531. It can be further optimized and limited that the mesh size of the primary screen hole 511 is ≤18 mesh, the mesh size of the secondary screen hole 521 is 20~100 mesh, and the mesh size of the tertiary screen hole 531 is ≥120 mesh.

[0025] The top of the screen barrel 4 is provided with flange 1 43, and the bottom of the screen barrel 4 is provided with flange 2 44. Flange 1 43 and flange 2 44 are compatible. The three screen barrels 4 are detachably connected in the stacked state through flange 1 43, flange 2 44 and the matching bolt and nut assembly 1. The top of the receiving tray 3 is provided with flange 3 31, which is compatible with flange 2 44. The screen barrel 4 at the bottom and the receiving tray 3 are detachably connected in the stacked state through flange 2 44, flange 3 31 and the matching bolt and nut assembly 2.

[0026] The vibration mechanism 2 includes a motor 21. An eccentric block 22 is fixedly connected to the drive shaft of the motor 21. The upper surface of the eccentric block 22 is provided with a shaft hole 221. A drive rod 32 is fixedly connected to the lower surface of the receiving tray 3. The drive rod 32 is adapted to the shaft hole 221. When the motor 21 is started, the motor 21 rotates and drives the eccentric block 22 to rotate. The eccentric block 22 is driven to vibrate the receiving tray 3 through the shaft engagement of the drive rod 32 with the shaft hole 221, thereby driving several screen barrels 4 to vibrate.

[0027] Several springs 11 are circumferentially arrayed on the upper surface of the base 1, and the upper ends of the springs 11 are fixedly connected to the lower surface of the receiving tray 3.

[0028] In this embodiment, the base 1, receiving tray 3, screen barrel 4, guide trough 7 and spring 11 are made of metal. The spring 11 is connected to the base 1 and receiving tray 3 by welding, and the guide trough 7 is connected to the receiving tray 3 and screen barrel 4 by welding.

[0029] The upper surface of the base 1 is provided with several guide rods 12 arranged in a circumferential array, and the lower surface of the receiving tray 3 is provided with several guide rods 34 arranged in a circumferential array. The spring 11 is sleeved on the guide rods 12 and 34, which improves the stability of the spring 11 under axial load and prevents the spring 11 from excessively bending and becoming unstable under vibration.

[0030] Working principle: The ore is placed into the uppermost screen barrel 4. The motor 21 is started, and the rotation of the motor 21 drives the eccentric block 22 to rotate. The eccentric block 22 then drives the receiving plate 3 to vibrate. The receiving plate 3 is connected to the screen barrel 4, thereby causing several screen barrels 4 to vibrate, thus dispersing the ore. Since the screening elements in the several screen barrels 4 have gradually smaller apertures from top to bottom, different particle size grades of ore can be screened through several screen barrels 4. This achieves the goal of separating multiple particle size grades of ore in one screening operation, simplifies the multi-stage screening process of ore, reduces the time consumption of multi-stage screening of ore, improves the screening efficiency of ore, and saves ore mining costs.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An ore screening device used in coal mining, characterized in that: Includes a base (1), which is a hollow cylinder with the opening facing upward. A receiving tray (3) is elastically connected to the upper surface of the base (1). The receiving tray (3) is a hollow cylinder with the opening facing upward. A discharge port (33) is provided on the side of the receiving tray (3). A guide groove (7) is connected to the discharge port (33). A vibration mechanism (2) is provided inside the base (1). The vibration mechanism (2) is connected to the receiving tray (3). Several screen barrels (4) are stacked on the upper surface of the receiving tray (3) in a detachable manner. Several screen barrels (4) are detachably connected to each other. The screen barrel (4) is cylindrical. A discharge port (45) is provided on the side of the screen barrel (4). A guide groove (7) is connected to the discharge port (45). A screening component is connected inside the screen barrel (4). The screening component has screen holes. The screen hole diameter of the upper screening component is larger than that of the lower screening component.

2. The ore screening equipment used in coal mining according to claim 1, characterized in that, The screening component is in the shape of a circular plate. The circumferential surface of the screening component is in contact with the inner wall of the screen barrel (4). A limiting component (41) is provided in the lower part of the inner wall of the screen barrel (4). The limiting component (41) is in the shape of a ring. The inner diameter of the limiting component (41) is smaller than the outer diameter of the screening component.

3. The ore screening equipment used in coal mining according to claim 2, characterized in that, The inner wall of the screen barrel (4) is provided with several linear grooves (42) arranged in an annular array. The top opening of the linear groove (42) is located on the upper surface of the screen barrel (4), and the bottom opening of the linear groove (42) is located on the upper surface of the limiting member (41). The circumferential surface of the screening member is provided with several positioning sliders (5), which are adapted to the linear grooves (42).

4. The ore screening equipment used in coal mining according to claim 3, characterized in that, A positioning rod (6) is slidably connected inside the linear chute (42). The sum of the height of the positioning rod (6) and the thickness of the screening element is equal to the length of the linear chute (42).

5. The ore screening equipment used in coal mining according to claim 4, characterized in that, The linear slide (42) has a limiting slide (421) on both sides of the vertical side, and the positioning rod (6) has a limiting slider (61) on both sides of the vertical side that is compatible with the limiting slide (421).

6. The ore screening equipment used in coal mining according to claim 3, characterized in that, The sieve barrel (4) has three screens, and the screening components include a primary screen (51), a secondary screen (52), and a tertiary screen (53). The primary screen (51) has a primary screen hole (511) and is connected to the sieve barrel (4) at the top. The secondary screen (52) has a secondary screen hole (521) and is connected to the sieve barrel (4) in the middle. The tertiary screen (53) has a tertiary screen hole (531) and is connected to the sieve barrel (4) at the bottom. The mesh number of the primary screen hole (511) is smaller than that of the secondary screen hole (521), and the mesh number of the secondary screen hole (521) is smaller than that of the tertiary screen hole (531).

7. The ore screening equipment used in coal mining according to claim 6, characterized in that, The top of the screen barrel (4) is provided with flange one (43), the bottom of the screen barrel (4) is provided with flange two (44), flange one (43) and flange two (44) are compatible, and the top of the receiving tray (3) is provided with flange three (31), flange three (31) and flange two (44) are compatible.

8. The ore screening equipment used in coal mining according to claim 1, characterized in that, The vibration mechanism (2) includes a motor (21), the motor (21) drive shaft is fixedly connected to an eccentric block (22), the upper surface of the eccentric block (22) is provided with a shaft hole (221), the lower surface of the receiving tray (3) is fixedly connected to a drive rod (32), and the drive rod (32) is adapted to the shaft hole (221).

9. The ore screening equipment used in coal mining according to claim 1, characterized in that, Several springs (11) are circumferentially connected to the upper surface of the base (1), and the springs (11) are fixedly connected to the lower surface of the receiving tray (3).

10. The ore screening equipment used in coal mining according to claim 9, characterized in that, The upper surface of the base (1) is provided with several guide rods (12) arranged in a circumferential array, and the lower surface of the receiving tray (3) is provided with several guide rods (34) arranged in a circumferential array. The spring (11) is sleeved on the guide rods (12) and the guide rods (34).

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