A multi-stage coal mine sorting device

Abstract

The present invention discloses a multi-stage sorting device for coal mines, including a screen box and a screen plate. The upper end of the screen box is provided with a feed port, and the side is provided with a plurality of discharge ports. A plurality of screen plates are provided in the screen box. An anti-blocking bracket is provided under each screen plate, and an anti-blocking component is provided on the anti-blocking bracket. The anti-blocking bracket is connected to a mobile box, and the mobile box is fixed under the screen plate. The anti-blocking component is used to decelerate the falling coal blocks and dredge the screen plate. The anti-blocking bracket is driven by the mobile box to switch between the deceleration and dredging functions. The present invention utilizes a rod assembly in the anti-blocking assembly to dredge the screen holes of the screen plate. The screen plate does not need to be removed during the dredging process. When dredging is not required, the rod assembly forms a shielding obstacle on the screen plate to slow down the rolling speed of the coal blocks and prevent the coal blocks from leaving the screen box without screening. The mobile box is used to drive the anti-blocking bracket to move to realize the switching of the two functions. One screen plate is equipped with one mobile box to realize the dredging of a single screen plate.

Description

Technical Field

[0001] The invention relates to the field of coal mine sorting, and in particular to a coal mine multi-stage sorting device. Background Art

[0002] The excavated coal needs to be classified according to the particle size. In the existing screening method, although multi-stage screening can be achieved to classify the coal according to the particle size, the coal particles are not uniformly spherical, so the holes of the screen plate will be blocked, thereby affecting the screening efficiency. When there are too many blockages, the screening device will become unusable. The existing method is to remove the screen plate for cleaning or replace it. However, there are many screen holes on the screen plate, and it is very time-consuming to clean it. The cleaned coal blocks need to be returned to the screening device for secondary screening, which further reduces the coal mine sorting efficiency. Summary of the invention

[0003] The object of the present invention is to provide a multi-stage coal mine sorting device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage sorting device for coal mines, comprising a screen box and a screen plate, wherein the upper end of the screen box is provided with a feed port, and the side is provided with a plurality of discharge ports, wherein a plurality of screen plates are provided in the screen box, and an anti-blocking bracket is provided under each screen plate, and an anti-blocking component is provided on the anti-blocking bracket, and the anti-blocking bracket is connected to a moving box, and the moving box is fixed under the screen plate, and the anti-blocking component is used to decelerate the falling coal blocks and dredge the screen plate, and the anti-blocking bracket is driven by the moving box to switch between the deceleration and dredging functions;

[0005] The sieve plate is provided with a plurality of sieve holes, each of which is connected to a gear bar groove, and the gear bar groove is provided on the sieve plate;

[0006] The anti-blocking assembly includes a rod assembly and a driving assembly. The number of the rod assemblies is consistent with the number of sieve holes on the sieve plate to which they are connected. The driving assembly is connected to the moving box, and the states of multiple rod assemblies are controlled simultaneously by the driving assembly.

[0007] The rod assembly includes a center rod and an opening rod, the lower end of the center rod is fixedly connected to the anti-blocking bracket, and a plurality of opening rods are arranged outside the center rod, each of the opening rods is fixedly connected to one end of an opening rack, and the other end of the opening rack extends into and is slidably connected to the center rod, the opening rack is meshed with the opening gear, the opening gear is fixedly connected to the transmission gear, the opening gear is rotatably connected to the center rod, and the transmission gear is rotatably connected to the anti-blocking bracket;

[0008] The driving assembly includes a main rack, a driving gear, and a driving rack. Two driving racks are provided and are fixedly connected to the mobile box. The driving rack can mesh with the driving gear. The driving gear meshes with the main rack. The main rack meshes with multiple row gears. Each row gear meshes with a row rack. The row rack meshes with multiple transmission gears. The driving gear and the row gears are rotatably connected in the anti-blocking bracket, and the main rack and the row rack are slidably connected in the anti-blocking bracket.

[0009] Preferably, the moving box is fixedly connected to a square guide plate by an axis, the axis is rotatably connected to a large gear, the large gear is fixedly connected to a wheel rail, one end of the guide pin is slidably connected to the wheel rail, the other end of the guide pin is hinged to one end of a connecting rod, the middle part of the guide pin is slidably connected to the outside of the guide plate, the other end of the connecting rod is hinged to the middle of the sliding column, one end of the sliding column is slidably connected to the guide groove, and the other end extends out of the moving box and is fixedly connected to the anti-blocking bracket, the guide groove is arranged on the guide plate, and a limiting mechanism is arranged on the sliding column.

[0010] Preferably, the limiting mechanism includes a telescopic rod and a limiting rod, one end of the telescopic rod is fixedly connected to the sliding column, and the other end is fixedly connected to one end of the limiting rod, the other end of the limiting rod slides in a vertically arranged limiting groove, the limiting groove is arranged on the moving box, and the telescopic rod is a passive telescopic rod.

[0011] Preferably, the large gear is meshed with the small gear, the small gear is fixedly connected to the output end of the motor, and the motor is fixed in the moving box.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention utilizes the rod assembly in the anti-blocking assembly to dredge the sieve holes of the sieve plate. The sieve plate does not need to be removed during the dredging process. When dredging is not required, the rod assembly forms a blocking obstacle on the sieve plate to slow down the rolling speed of the coal blocks and prevent the coal blocks from leaving the screen box without screening. The mobile box is used to drive the movement of the anti-blocking bracket to achieve switching between the two functions. One sieve plate is equipped with a mobile box to achieve dredging for a single sieve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0015] Figure 3 A schematic diagram of the cross-sectional structure of the present invention from another angle;

[0016] Figure 4 It is a structural schematic diagram of the mobile box of the present invention;

[0017] Figure 5 It is a schematic diagram of the internal structure of the mobile box of the present invention;

[0018] Figure 6 It is a structural schematic diagram of the rod assembly of the present invention;

[0019] Figure 7 is a schematic diagram of the rod assembly of the present invention from another angle;

[0020] Figure 8 It is a structural schematic diagram of the open gear of the present invention;

[0021] Fig. 9 It is a schematic diagram of the structure of the driving assembly of the present invention.

[0022] In the figure: 1. screen box, 101. feed port, 102. discharge port, 2. screen plate, 201. screen hole, 202. gear rod slot, 3. anti-blocking component, 301. center rod, 302. opening rod, 303. opening gear, 304. transmission gear, 305. opening rack, 306. row rack, 307. row gear, 308. main rack, 309. driving gear, 310. driving rack, 4. anti-blocking bracket, 5. mobile box, 501. large gear, 502. small gear, 503. guide plate, 504. guide slot, 505. sliding column, 506. wheel slide rail, 507. telescopic rod, 508. limit rod, 509. limit slot, 510. connecting rod, 511. guide pin. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-9In order to solve the problem that coal particles may cause blockage of the screen plate holes, the rod assembly in the anti-blocking assembly is used to dredge the screen holes of the screen plate. The screen plate does not need to be removed during the dredging process. When dredging is not required, the rod assembly forms a blocking obstacle on the screen plate to slow down the rolling speed of the coal blocks and prevent the coal blocks from leaving the screen box without screening. The mobile box is used to drive the anti-blocking bracket to move to achieve switching between the two functions. One screen plate is equipped with a mobile box to achieve dredging for a single screen plate. The present invention provides a technical solution: a multi-stage sorting device for coal mines, comprising a screen box 1 and a screen plate 2. The screen box 1 is provided with a feed port 101 at the upper end and multiple discharge ports 102 at the side. A plurality of screen plates 2 are provided in the screen box 1. An anti-blocking bracket 4 is provided under each screen plate 2. An anti-blocking component 3 is provided on the anti-blocking bracket 4. The anti-blocking bracket 4 is connected to a moving box 5. The moving box 5 is fixed under the screen plate 2. The anti-blocking component 3 is used to decelerate the falling coal blocks and clear the screen plate 2. The anti-blocking bracket 4 is driven by the moving box 5 to switch between the deceleration and clearing functions. A plurality of screen holes 201 are provided on the screen plate 2. Each screen hole 201 is connected to a gear rod slot 202. The gear rod slot 202 is provided on the screen plate 2. In this application, electrical components such as motor cylinder push rods are all of existing models. When in use, add coal blocks to the feed port 101, and the coal blocks fall on the screen plate 2 for screening. The screen plate 2 is tilted, and the coal blocks roll on it. The rod assembly hinders the rolling of the coal blocks and changes their rolling trajectory to ensure sufficient screening. The screened coal is transported to the next process by means of a conveyor belt or the like. As needed, the screen plate 2 can be vibrated by means of a cam and a motor to further improve the screening efficiency. When the screening is completed and dredging is required, the moving box 5 is used to drive the anti-blocking bracket 4 to move, and the anti-blocking bracket 4 drives the anti-blocking assembly 3 to move, so that the rod assembly comes out of the gear rod slot 202 and then enters the screen hole 201 for dredging.

[0025] In order to facilitate the dredging of the sieve holes 201, an anti-blocking assembly 3 is provided, and the anti-blocking assembly 3 includes a rod assembly and a driving assembly. The number of the rod assemblies is consistent with the number of the sieve holes 201 on the sieve plate 2 to which they are connected. The driving assembly is connected to the moving box 5, and the states of multiple rod assemblies are controlled simultaneously by the driving assembly. The rod assembly includes a central rod 301 and an opening rod 302. The lower end of the central rod 301 is fixedly connected to the anti-blocking bracket 4. Multiple opening rods 302 are arranged outside the central rod 301. One end of an opening rack 305 is fixedly connected to each opening rod 302. The other end of the opening rack 305 extends into and slidably connects to the central rod 301. The opening rack 305 meshes with the opening gear 303. The opening gear 303 is fixedly connected to the transmission gear 304. The opening gear 303 is rotatably connected to the central rod 301, and the transmission gear 304 is rotatably connected to the anti-blocking bracket 4. The shape of the center rod 301 can be polygonal or circular, and the shape of the opening rod 302 is the same. In order to achieve a larger stroke, the opening racks 305 on the multiple opening rods 302 are set at different heights to avoid interference, thereby achieving a larger stroke. The driving assembly includes a main rack 308, a driving gear 309, and a driving rack 310. There are two driving racks 310, both of which are fixedly connected to the moving box 5. The driving rack 310 can be meshed with the driving gear 309, and the driving gear 309 is meshed with the main rack 308. The main rack 308 is meshed with multiple row gears 307, and each row gear 307 is meshed with a row rack 306. The row rack 306 is meshed with multiple transmission gears 304. The driving gear 309 and the row gear 307 are rotatably connected to the anti-blocking bracket 4, and the main rack 308 and the row rack 306 are slidably connected to the anti-blocking bracket 4. When in use, start the moving box 5, and the sliding column 505 of the moving box 5 drives the anti-blocking bracket 4 to move downward first, and the anti-blocking bracket 4 drives the anti-blocking assembly 3 to descend, so that the rod assembly part is completely separated from the gear lever groove 202 of the screen plate 2, and then the sliding column 505 of the moving box 5 drives the anti-blocking bracket 4 to move horizontally. During the movement of the anti-blocking bracket 4, the driving gear 309 is engaged with the driving rack 310 below, so that the driving gear 309 rotates, and the driving gear 309 drives the main rack 308 to move, and the main rack 308 drives multiple row gears 307 to rotate, and the row gear 307 drives the row rack 306 to move, and the row rack 306 drives multiple transmission gears 304 to rotate The transmission gear 304 drives the opening gear 303 to rotate. The rotation of the opening gear 303 drives multiple opening racks 305 to slide out. The opening racks 305 drive the opening rod 302 to move away from the center rod 301, thereby increasing the contact area of ​​the rod assembly. The moving box 5 drives the anti-blocking bracket 4 to move upward to lift the coal blocks stuck in the screen hole 201, so that the coal blocks roll out of the screen box 1. Finally, the moving box 5 drives the anti-blocking bracket 4 to move horizontally, and the driving gear 309 engages with the driving rack 310 above again, and the opening rod 302 approaches the center rod 301. When the opening rod 302 is fully retracted, the rod assembly enters the gear slot 202, and screening can continue at this time.

[0026] In order to realize the movement of the anti-blocking bracket 4, a square guide plate 503 is fixedly connected to the moving box 5 through an axis, and the axis is rotatably connected to a large gear 501, and the large gear 501 is fixedly connected to a roller slide rail 506, and one end of the guide pin 511 is slidably connected to the roller slide rail 506, and the other end of the guide pin 511 is hinged to one end of a connecting rod 510, and the middle part of the guide pin 511 is slidably connected to the outside of the guide plate 503, and the other end of the connecting rod 510 is hinged to the middle part of the sliding column 505, one end of the sliding column 505 is slidably connected to the guide groove 504, and the other end extends out of the moving box 5 and is fixedly connected to the anti-blocking bracket 4, the guide groove 504 is set on the guide plate 503, and a limiting mechanism is set on the sliding column 505. The limiting mechanism includes a telescopic rod 507 and a limiting rod 508. One end of the telescopic rod 507 is fixedly connected to the sliding column 505, and the other end is fixedly connected to one end of the limiting rod 508. The other end of the limiting rod 508 slides in a vertically arranged limiting groove 509. The limiting groove 509 is arranged on the moving box 5. The telescopic rod 507 is a passive telescopic rod. The large gear 501 is meshed with the small gear 502. The small gear 502 is fixedly connected to the output end of the motor, and the motor is fixed in the moving box 5. When in use, start the motor, the motor drives the small gear 502 to rotate, the small gear 502 drives the large gear 501 to rotate, the large gear 501 drives the roller track 506 to rotate, the roller track 506 drives the guide pin 511 to slide along the outer ring of the guide plate 503, the guide pin 511 drives the connecting rod 510 to move, and the connecting rod 510 drives the sliding column 505 to slide in the guide groove 504. During this process, in order to prevent the sliding column 505 from rotating, the sliding column 505 drives the telescopic rod 507 to passively retract and move, and the telescopic rod 507 drives the limit rod 508 to slide in the limit groove 509. During this process, the sliding column 505 drives the anti-blocking bracket 4 to move so that the anti-blocking bracket 4 can switch between clearing the sieve holes and preventing falling.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage coal sorting device, comprising a screen box (1) and a screen plate (2), wherein the screen box (1) is provided with a feed inlet (101) at the upper end and a plurality of discharge outlets (102) at the side, characterized in that: The screen box (1) is provided with a plurality of screen plates (2), an anti-blocking bracket (4) is provided under each screen plate (2), an anti-blocking component (3) is provided on the anti-blocking bracket (4), the anti-blocking bracket (4) is connected to a moving box (5), the moving box (5) is fixed under the screen plate (2), the anti-blocking component (3) is used to decelerate the falling coal blocks and clear the screen plate (2), and the moving box (5) drives the anti-blocking bracket (4) to move and switch between the deceleration and clearing functions; The sieve plate (2) is provided with a plurality of sieve holes (201), each sieve hole (201) is connected to a gear bar groove (202), and the gear bar groove (202) is provided on the sieve plate (2); The anti-blocking assembly (3) comprises a rod assembly and a driving assembly, the number of the rod assemblies being consistent with the number of sieve holes (201) on the sieve plate (2) to which they are connected, the driving assembly being connected to the moving box (5), and the states of a plurality of rod assemblies being controlled simultaneously by the driving assembly; The rod assembly comprises a central rod (301) and an opening rod (302); the lower end of the central rod (301) is fixedly connected to the anti-blocking bracket (4); a plurality of opening rods (302) are arranged outside the central rod (301); the opening racks (305) on the plurality of opening rods (302) are arranged at different heights; one end of an opening rack (305) is fixedly connected to each opening rod (302); the other end of the opening rack (305) extends into and is slidably connected to the central rod (301); the opening rack (305) is meshed with an opening gear (303); the opening gear (303) is fixedly connected to a transmission gear (304); the opening gear (303) is rotatably connected to the central rod (301); and the transmission gear (304) is rotatably connected to the anti-blocking bracket (4); The driving assembly comprises a main rack (308), a driving gear (309), and a driving rack (310); two driving racks (310) are provided and are fixedly connected to the moving box (5); the driving rack (310) can mesh with the driving gear (309); the driving gear (309) meshes with the main rack (308); the main rack (308) meshes with a plurality of row gears (307); each row gear (307) meshes with a row rack (306); the row racks (306) mesh with a plurality of transmission gears (304); the driving gear (309) and the row gears (307) are rotatably connected to the anti-blocking bracket (4); the main rack (308) and the row rack (306) are slidably connected to the anti-blocking bracket (4); The movable box (5) is fixedly connected to a square guide plate (503) via an axis, the axis is rotatably connected to a large gear (501), the large gear (501) is fixedly connected to a wheel rail (506), one end of a guide pin (511) is slidably connected to the wheel rail (506), the other end of the guide pin (511) is hinged to one end of a linkage rod (510), the middle part of the guide pin (511) is slidably connected to the outside of the guide plate (503), the other end of the linkage rod (510) is hinged to the middle part of a sliding column (505), one end of the sliding column (505) is slidably connected to the guide groove (504), and the other end extends out of the movable box (5) and is fixedly connected to the anti-blocking bracket (4), the guide groove (504) is provided on the guide plate (503), and a limiting mechanism is provided on the sliding column (505).

2. A coal mine multi-stage sorting device according to claim 1, characterized in that: The limiting mechanism comprises a telescopic rod (507) and a limiting rod (508); one end of the telescopic rod (507) is fixedly connected to the sliding column (505), and the other end is fixedly connected to one end of the limiting rod (508); the other end of the limiting rod (508) slides in a vertically arranged limiting groove (509); the limiting groove (509) is arranged on the moving box (5); and the telescopic rod (507) is a passive telescopic rod.

3. A coal mine multi-stage sorting device according to claim 2, characterized in that: The large gear (501) meshes with the small gear (502), the small gear (502) is fixedly connected to the output end of the motor, and the motor is fixed in the moving box (5).

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