CN116571443A - Coal ash screening device for open-pit coal mine - Google Patents

Abstract

The invention discloses a coal ash screening device for an open pit coal mine, which relates to the technical field of coal ash screening devices and comprises a working box, wherein a feed inlet is formed in the top wall of the working box, a discharge outlet is formed in the bottom wall of the working box, a screening mechanism is arranged in the working box, the screening mechanism comprises two screens symmetrically arranged in the working box, openings are formed in the side walls of the screens, and a useful blanking pipeline is arranged on each opening; the inside of the working box is also provided with a vibrating mechanism, the vibrating mechanism is used for vibrating the screen, and the screening mechanism and the vibrating mechanism are arranged to screen and filter large-particle coal blocks in the coal ash and separate large-particle coal block particles, so that the full combustion efficiency of the coal ash is ensured, the device is matched with the linkage assembly to drive the cleaning mechanism through a driving piece of the vibrating mechanism, and the cleaning mechanism is used for cleaning the adhered coal dust on the side wall of the device, so that the waste of the coal ash is avoided.

Description

Coal Ash Screening Device for Open-pit Coal Mine

technical field

The invention relates to the technical field of coal ash screening devices, in particular to an open-pit coal mine coal ash screening device.

Background technique

In thermal power plants, coal is generally used to generate electricity. The collected coal is ground and crushed and put into the coal bunker for combustion. However, some coal powder will be mixed with some large particles of coal or coal particles, making It is difficult to burn fully, so it is necessary to filter the pulverized coal before burning to separate large coal particles to ensure sufficient burning.

Contents of the invention

The purpose of the present invention is to solve the shortcoming in the prior art, and propose a kind of open-pit coal mine coal ash screening device.

In order to achieve the above object, the present invention adopts the following technical solutions:

An open-pit coal mine coal ash screening device, comprising a working box, the top wall of the working box is provided with a material inlet, the bottom wall of the working box is provided with a discharge port, and the inside of the working box is provided with a screening Mechanism, the screening mechanism includes two screens symmetrically installed inside the working box, the side wall of the screen is provided with an opening, and a feeding pipeline is installed on the opening; the inside of the working box is also A vibrating mechanism is provided for vibrating the screen.

The above technical solution further includes: the feeding pipeline includes a corrugated hose and a feeding pipe, one end of the corrugated hose is fixedly connected to the outer wall of the screen, and the corrugated hose communicates with the opening, The other end of the corrugated hose is fixedly connected to the top of the feeding pipe, through holes are opened on the opposite side walls of the working box, and the two openings are respectively movably installed in the two through holes. The outer wall of the working box is also provided with two collecting boxes, and the collecting boxes are located directly below the feeding pipe.

The vibration mechanism includes a driving motor fixedly installed on the outer wall of the working box, the end of the output shaft of the driving motor is fixedly connected with a rotating shaft, and the rotating shaft moves through the side wall of the working box and extends to the working box. Inside the box, the end of the rotating shaft away from the driving motor is rotatably connected to the inner wall of the working box, the outer wall of the rotating shaft is fixedly equipped with a driving block, and a plurality of rollers are movably installed on the driving block. The outer wall of the screen is provided with an arc-shaped groove, the outer wall of the roller moves to press against the inner wall of the arc-shaped groove, and a shaking assembly is arranged on the screen.

The inner wall of the driving block is provided with a plurality of movable grooves, the inner wall of the movable groove is slidably connected with a top block, the top wall of the top block is provided with a rotating groove, and the roller is rotatably connected to the inner wall of the rotating groove , the inner wall of the movable groove is fixedly connected with a telescopic rod, and the end of the telescopic rod far away from the inner wall of the movable groove is fixedly connected with the bottom wall of the top block, and the outer part of the telescopic rod is provided with a return spring, so Both ends of the return spring are respectively fixedly connected to the bottom wall of the top block and the inner wall of the movable groove.

The shaking assembly includes a plurality of second compression springs fixedly connected to the bottom wall of the screen, a plurality of second fixing plates are fixedly installed on the side wall of the working box, and the outer walls of the second compression springs are away from One end of the screen is fixedly connected to the outer wall of the second fixed plate, and the outer wall of the screen is also fixedly equipped with a plurality of first fixed plates, and the outer wall of the first fixed plate is fixedly connected with a first A compression spring, the inner wall of the working box is fixedly connected with a material distribution plate, and the end of the first compression spring away from the first fixing plate is fixedly connected with the bottom wall of the material distribution plate.

The inside of the working box is also provided with a cleaning mechanism, the cleaning mechanism includes two scrapers slidingly connected to the inner bottom wall of the working box, the outer wall of the scraper is fixedly connected with a movable rod, and the movable The end of the rod moves through the side wall of the working box and extends to the outside of the working box, the end wall of the movable rod away from the scraper is fixedly connected with a connecting rod, and the outside of the working box is also provided with There is a linkage assembly for driving the connecting rod to move.

The linkage assembly includes a driving bevel gear fixedly installed on the outer wall of the rotating shaft. Two bidirectional screw rods are rotatably connected to the outer wall of the working box. Bevel gears, the two driven bevel gears are respectively meshed with the driving bevel gears, the outer wall of the two-way screw rod is threadedly connected with a threaded slider, and the end of the connecting rod away from the movable rod is fixedly connected to the on the outer wall of the threaded slider.

The outer wall of the working box is symmetrically provided with two limiting grooves, the outer wall of the threaded slider is fixedly connected with a limiting rod, and the end of the limiting rod far away from the threaded slider is slidably connected to the limiting groove the inner wall.

Compared with the prior art, the beneficial effects of the present invention are:

In the present invention, the coal ash with large particles in the coal ash is screened and filtered through the screening mechanism and the vibration mechanism, and the coal particles with larger particles are separated to ensure the full combustion efficiency of the coal ash, and the device passes vibration The driving part of the mechanism cooperates with the linkage assembly to drive the cleaning mechanism, and the coal powder adhered to the side wall of the device is cleaned through the cleaning mechanism to avoid waste of coal ash.

Description of drawings

Fig. 1 is the first overall structural schematic diagram of a coal ash screening device for an open pit coal mine proposed by the present invention;

Fig. 2 is a first internal structural schematic diagram of a coal ash screening device in an open-pit coal mine;

Fig. 3 is a second overall structural schematic diagram of a coal ash screening device in an open-pit coal mine;

Fig. 4 is a second internal structural schematic diagram of a coal ash screening device in an open-pit coal mine;

Fig. 5 is a partial sectional structural schematic diagram of a vibrating mechanism and a cleaning mechanism;

Fig. 6 is the overall structure schematic diagram of vibrating mechanism and cleaning mechanism;

FIG. 7 is a schematic diagram of an enlarged structure at A in FIG. 2;

Fig. 8 is a schematic diagram of an enlarged structure at B in Fig. 2;

Fig. 9 is a schematic diagram of an enlarged structure at C in Fig. 3;

Fig. 10 is a schematic diagram of an enlarged structure at D in Fig. 4;

FIG. 11 is a schematic diagram of an enlarged structure at E in FIG. 4;

Fig. 12 is a schematic diagram of an enlarged structure at F in Fig. 5;

FIG. 13 is a schematic diagram of an enlarged structure at G in FIG. 6 .

In the picture:

10. Working box; 11. Inlet port; 12. Outlet port; 13. Collection box; 14. Distribution plate;

21, screen; 221, corrugated hose; 222, feeding pipe; 23, arc groove; 24, opening;

31, driving motor; 32, rotating shaft; 33, driving block; 34, movable slot; 35, top block; 36, roller; 37, telescopic rod; 38, return spring; 39, first compression spring; 310, first fixing Plate; 311, the second fixed plate; 312, the second compression spring;

41. Driving bevel gear; 42. Driven bevel gear; 43. Two-way screw; 44. Thread slider; 45. Connecting rod; 46. Movable rod; 47. Scraper;

51, limit groove; 52, limit rod.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

With reference to accompanying drawing 1-13, a kind of open-pit coal mine coal ash screening device that the present invention proposes comprises working box 10, and the top wall of described working box 10 is provided with feed inlet 11, and the bottom wall of described working box 10 is provided with There is a discharge port 12; among them, the feed port 11 is used to put unscreened coal ash into the working box 10, and the discharge port 12 is used to collect qualified coal ash after screening.

The inside of the working box 10 is provided with a screening mechanism, and the screening mechanism includes two screens 21 symmetrically installed inside the working box 10 (the screens 21 are installed at an angle of 10°-20° to the working box) , the sidewall of the screen 21 is provided with an opening 24 (the opening 24 is used for the coal ash particles screened out to flow out from the screen 21), and a useful feeding pipeline is installed on the opening 24; wherein, the screen 21 is close to The side wall of the opening 24 is provided with a sloping plate, which is used to facilitate the flow of large particles from the opening 24 into the corrugated hose 221 .

A vibrating mechanism is also provided inside the working box 10, and the vibrating mechanism is used to make the screen 21 vibrate.

The feeding pipeline includes a corrugated hose 221 and a feeding pipe 222. One end of the corrugated hose 221 is fixedly connected to the outer wall of the screen 21, and the corrugated hose 221 communicates with the opening 24. The other end of the corrugated hose 221 is fixedly connected to the top end of the feeding pipe 222; wherein, the corrugated hose 221 is flexible and movable, so that when the screen 21 vibrates, the corrugated hose 221 will not cause any impact on the screen 21. movement interference.

The opposite side walls of the working box 10 are respectively provided with through holes, and the two openings 24 are respectively movably installed in the two through holes; wherein, when the screen 21 shakes up and down, the corrugated hose 221 is in the through holes. Activity.

The outer wall of the working box 10 is also provided with two collection boxes 13, and the collection boxes 13 are located directly below the feeding pipe 222; wherein, the collection boxes 13 are used to collect the sieved large particles of coal ash.

The vibration mechanism includes a driving motor 31 fixedly mounted on the outer wall of the working box 10, the end of the output shaft of the driving motor 31 is fixedly connected with a rotating shaft 32, and the rotating shaft 32 moves through the side wall of the working box 10 And extend to the inside of the working box 10 , the end of the rotating shaft 32 away from the driving motor 31 is rotatably connected to the inner wall of the working box 10 through a bearing.

The outer wall of the rotating shaft 32 is fixedly equipped with a drive block 33, and a plurality of rollers 36 are movably installed on the drive block 33. The outer wall of the screen 21 is provided with an arc-shaped groove 23, and the outer wall of the roller 36 is movable to press the inner wall of the arc-shaped groove 23 .

A shaking assembly is provided on the screen 21; wherein, the shaking assembly is used to make the screen 21 shake.

The inner wall of the driving block 33 is provided with a plurality of movable grooves 34, and the inner wall of the movable groove 34 is slidably connected with a top block 35, and the top wall of the top block 35 is provided with a rotating groove, and the roller 36 is connected through a rotating shaft. On the inner wall of the rotating groove; Wherein, when the roller 36 contacts the inner wall of the arc groove 23, the roller 36 moves in the tendency of rotation, reducing the wear on the inner wall of the arc groove 23.

The inner wall of the movable groove 34 is fixedly connected with a telescoping rod 37, and the end of the telescopic rod 37 away from the inner wall of the movable groove 34 is fixedly connected to the bottom wall of the top block 35, and the outside of the telescopic rod 37 is sleeved Back-moving spring 38 is arranged, and the two ends of described back-moving spring 38 are respectively fixedly connected on the bottom wall of described top block 35 and the inner wall of described movable groove 34; The telescopic rod 37 and the back-moving spring 38 can buffer the impact force produced by the top block 35, thereby buffering the positions of the rotating shaft 32 and the inner wall of the working box 10 and the connecting points of the rotating shaft 32 and the output shaft of the drive motor 31, thereby improving the service life of the equipment.

The shaking assembly includes a plurality of second compression springs 312 fixedly connected to the bottom wall of the screen 21, a plurality of second fixing plates 311 are fixedly installed on the side wall of the working box 10, and the second compression One end of the outer wall of the spring 312 away from the screen 21 is fixedly connected to the outer wall of the second fixed plate 311, and the outer wall of the screen 21 is also fixedly equipped with a plurality of first fixed plates 310, the first fixed A first compression spring 39 is fixedly connected to the outer wall of the plate 310, and one end of the first compression spring 39 away from the first fixed plate 310 is fixedly connected to the bottom wall of the distribution plate 14; The second compression spring 312 and the first compression spring 39 make the sieve 21 in a swayable connection inside the working box 10, thereby realizing swaying screening and improving the screening efficiency of coal ash.

The inner wall of the working box 10 is fixedly connected with a material distribution plate 14; wherein, the shape of the material distribution plate 14 is roughly herringbone, and is installed below the bottom opening of the feed port 11, so as to drop the material in the feed port 11. In addition, the outer wall of the material distribution plate 14 is provided with a super-hydrophobic layer to prevent unscreened coal ash from adhering to the material distribution plate 14 .

The inside of the working box 10 is also provided with a cleaning mechanism, the cleaning mechanism includes two scrapers 47 that are slidably connected to the inner bottom wall of the working box 10, and the outer walls of the scrapers 47 are fixedly connected with movable rods. 46, the end of the movable rod 46 moves through the side wall of the working box 10 and extends to the outside of the working box 10, and the end wall of the movable rod 46 away from the scraper 47 is fixedly connected with a connection Rod 45, the outside of the working box 10 is also provided with a linkage assembly for driving the connecting rod 45 to move; wherein, when cleaning the coal ash stuck on the inner wall of the working box 10, by moving the two movable bars 46 , so that the movable rod 46 drives the scraper 47 to scrape off on the inner wall of the work box 10, thereby cleaning the coal ash adhered to the inclined inner wall of the work box 10, and avoiding coal ash from accumulating on the inner wall of the work box 10 to cause sieving Waste of coal ash after separation.

Described linkage assembly comprises the driving bevel gear 41 that is fixedly installed on the outer wall of described rotating shaft 32, and the outer wall of described working box 10 is connected with two bidirectional screw rods 43 (two-way screw rods 43 are connected to the working box 10 by bearing connecting rod. On the outer wall), the two-way screw rod 43 is equipped with a driven bevel gear 42 near one end of the driving bevel gear 41, and the two driven bevel gears 42 are meshed with the driving bevel gear 41 respectively. The outer wall of the two-way screw rod 43 is threaded with a threaded slider 44, and the end of the connecting rod 45 away from the movable rod 46 is fixedly connected to the outer wall of the threaded slider 44; The driving part of the vibration mechanism is used as the driving force of the cleaning mechanism, thereby saving the initial investment cost of the equipment.

The outer wall of the working box 10 is symmetrically provided with two limiting grooves 51, the outer wall of the threaded slider 44 is fixedly connected with a limiting rod 52, and the end of the limiting rod 52 away from the threaded slider 44 is slidably connected on the inner wall of the limiting groove 51; wherein, the threaded slider 44 can be limited by the set limiting groove 51 and the limiting rod 52, so that the threaded slider 44 does not rotate when it moves, thereby The stability of the movement of the threaded slider 44 is improved, thereby improving the stability of the movement of the connecting rod 45 , the movable rod 46 and the scraper 47 .

In the present embodiment, the operating principle of the device is: when using the device, first start the driving motor 31, then put a bag for collecting coal ash on the bottom of the discharge port 12, and then unscreened coal ash from the Pour into the feed port 11, and the coal ash falls on the two screens 21 after being diverted by the material distribution plate 14;

After the driving motor 31 starts, the driving motor 31 drives the rotating shaft 32 to rotate, and the rotating shaft 32 drives the driving block 33 to rotate, and the driving block 33 drives the top block 35 and the roller 36 to rotate around the central axis of the rotating shaft 32, so that the two rollers 36 are discontinuously opposite to each other. Screen cloth 21 carries out top pressure, and when roller 36 presses screen cloth 21, deformation occurs in first compression spring 39 and second compression spring 312, when roller 36 moves out from screen cloth 21, first compression spring 39 and second compression spring 39 and second compression spring 312 deform. The compression spring 312 makes the screen 21 shake under the action of its own elastic force, thereby screening the coal ash;

When the rotating shaft 32 is rotating, the rotating shaft 32 drives the driving bevel gear 41 to rotate, and the driving bevel gear 41 meshes with the two driven bevel gears 42, thereby driving the two driven bevel gears 42 to rotate, and the driven bevel gear 42 drives the two-way screw rod 43 rotates, and the thread on the outer wall of the two-way screw rod 43 engages the threaded slider 44, thereby driving the threaded slider 44 to reciprocate on the two-way screw rod 43, and then drives the connecting rod 45 to drive the movable rod 46 to reciprocate, thereby driving the scraper 47 Move back and forth on the inner wall of the working box 10 to clean the inner wall of the working box 10;

In the present invention, the coal ash with large particles in the coal ash is screened and filtered through the screening mechanism and the vibration mechanism, and the coal particles with larger particles are separated to ensure the full combustion efficiency of the coal ash, and the device passes vibration The driving part of the mechanism cooperates with the linkage assembly to drive the cleaning mechanism, and the coal powder adhered to the side wall of the device is cleaned through the cleaning mechanism to avoid waste of coal ash.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (8)

1. an open pit coal mine coal ash screening device is characterized in that, comprises working box (10), and the top wall of described working box (10) is provided with feed inlet (11), and the top wall of described working box (10) The bottom wall is provided with a discharge port (12), and the inside of the working box (10) is provided with a screening mechanism, and the screening mechanism includes two screens (21) symmetrically installed inside the working box (10). ), the side wall of the screen (21) is provided with an opening (24), and a useful feeding pipeline is installed on the opening (24); the inside of the working box (10) is also provided with a vibrating mechanism, and the vibrating The mechanism is used to vibrate the screen (21). 2. A coal ash screening device for an open-pit coal mine according to claim 1, characterized in that, the feeding pipeline comprises a corrugated hose (221) and a feeding pipe (222), and the corrugated hose (221 ) is fixedly connected to the outer wall of the screen (21), the corrugated hose (221) communicates with the opening (24), and the other end of the corrugated hose (221) is connected to the lower The top of the material pipe (222) is fixedly connected, and through holes are respectively opened on the opposite side walls of the working box (10), and the two openings (24) are movably installed in the two through holes respectively, and the working box The outer wall of (10) is also provided with two collection boxes (13), and the collection boxes (13) are located directly below the feeding pipe (222). 3. A kind of open pit coal mine coal ash screening device according to claim 1, is characterized in that, described vibration mechanism comprises the drive motor (31) that is fixedly installed on the outer wall of described working box (10), and described drive The output shaft end of the motor (31) is fixedly connected with a rotating shaft (32), and the rotating shaft (32) runs through the side wall of the working box (10) and extends to the inside of the working box (10). One end of rotating shaft (32) away from described driving motor (31) is rotatably connected on the inner wall of described working box (10), and the outer wall of described rotating shaft (32) is fixedly equipped with driving block (33), and described driving block ( 33) A plurality of rollers (36) are movably installed on the top, and the outer wall of the screen (21) is provided with an arc-shaped groove (23), and the outer wall of the roller (36) is movable to press the arc-shaped groove (23) The inner wall of the screen mesh (21) is provided with shaking components. 4. A kind of open-pit coal mine coal ash screening device according to claim 3, is characterized in that, the inner wall of described driving block (33) offers a plurality of movable grooves (34), and the movable groove (34) The inner wall is slidably connected with a top block (35), and the top wall of the top block (35) is provided with a turning groove, and the roller (36) is rotatably connected on the inner wall of the turning groove, and the movable groove (34) The inner wall is fixedly connected with a telescopic rod (37), and the end of the telescopic rod (37) away from the inner wall of the movable groove (34) is fixedly connected to the bottom wall of the top block (35), and the telescopic rod (37) A return spring (38) is sleeved on the outside of the backrest, and the two ends of the return spring (38) are respectively fixedly connected to the bottom wall of the top block (35) and the inner wall of the movable groove (34). 5. A coal ash screening device for an open-pit coal mine according to claim 3, characterized in that the shaking assembly includes a plurality of second compression springs (312) fixedly connected to the bottom wall of the screen (21) ), a plurality of second fixed plates (311) are fixedly installed on the side wall of the working box (10), and the outer wall of the second compression spring (312) is fixedly connected to the end of the screen (21) away from the On the outer wall of the second fixed plate (311), the outer wall of the screen (21) is also fixedly equipped with a plurality of first fixed plates (310), and the outer wall of the first fixed plate (310) is fixedly connected There is a first compression spring (39), the inner wall of the working box (10) is fixedly connected with a distribution plate (14), and the end of the first compression spring (39) away from the first fixed plate (310) is fixed Connected to the bottom wall of the distribution plate (14). 6. A coal ash screening device for an open-pit coal mine according to claim 5, characterized in that, the inside of the working box (10) is also provided with a cleaning mechanism, and the cleaning mechanism includes a (10) two scrapers (47) on the inner bottom wall, the outer wall of the scraper (47) is fixedly connected with a movable rod (46), and the end of the movable rod (46) runs through the working The side wall of the box (10) extends to the outside of the working box (10), and the movable rod (46) is fixedly connected with a connecting rod (45) on the end wall away from the scraper (47). A linkage assembly for driving the connecting rod (45) to move is also arranged outside the working box (10). 7. A coal ash screening device for an open-pit coal mine according to claim 6, characterized in that, the linkage assembly includes a driving bevel gear (41) fixedly mounted on the outer wall of the rotating shaft (32), and the working The outer wall of the box (10) is rotatably connected with two two-way screw mandrels (43), and one end of the two-way screw mandrels (43) near the driving bevel gear (41) is equipped with a driven bevel gear (42). The driven bevel gear (42) is meshed with the driving bevel gear (41) respectively, the outer wall of the two-way screw rod (43) is threadedly connected with a threaded slider (44), and the connecting rod (45) is away from One end of the movable rod (46) is fixedly connected to the outer wall of the threaded slider (44). 8. A kind of coal ash screening device for open-pit coal mine according to claim 7, characterized in that, the outer wall of the working box (10) is symmetrically provided with two limit grooves (51), and the threaded slider ( 44) is fixedly connected to the outer wall of the limiting rod (52), and the end of the limiting rod (52) away from the threaded slider (44) is slidably connected to the inner wall of the limiting groove (51).