CN113171973A

CN113171973A - Mining coal screening plant

Info

Publication number: CN113171973A
Application number: CN202110484895.0A
Authority: CN
Inventors: 王爱义
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-27

Abstract

The invention discloses a mining coal screening device which comprises a machine body, wherein an air pump is fixedly arranged on the left side of the machine body, a partition plate is fixedly arranged inside the machine body, an air groove is formed in the left side of the partition plate and inside the machine body, a screening mechanism is arranged on the right side of the partition plate and inside the machine body, and a buffer mechanism is arranged above the screening mechanism and inside the machine body. According to the mining coal screening device, the screening mechanism and the machine body are matched for use, the driving motor drives the fixing ring to rotate, the annular rack on the surface of the fixing ring is meshed with the first rack for transmission, the annular rack is semi-annular, so that the transverse plate and the screening plate are driven by the connecting rod, the reset spring and the annular rack to vibrate in two dimensions, meanwhile, the inner edge of the screening opening is in the shape of an inverted bowl, and the inner edge of the screening opening is smooth, so that materials can be prevented from blocking the screening opening, screening efficiency is increased, and the mining coal screening device has good practicability and creativity.

Description

Mining coal screening plant

Technical Field

The invention relates to the field of electromechanical equipment, in particular to the field of mining coal screening devices.

Background

As is known, in the production process of coal mines, the produced coal particles are different in size, and coals with different particle sizes have different purposes, so that the coal mines are all provided with mining coal screening equipment for screening the coal particles with different particle sizes, the existing mining coal screening equipment is diversified and divided into pre-screening and inspection screening, the pre-screening refers to screening before ores enter a crusher, parts which are qualified for the crusher are separated from the ores by using a screen, such as a grid screen and a screen which are installed before a coarse crusher, and undersize products, so that the ore amount entering the crusher can be reduced, the yield of the crusher can be improved, the inspection screening refers to screening after the ores are crushed, the aim is to ensure that the final crushed ore products meet the granularity requirement of grinding operation, and the unqualified crushed ore products are returned to the crushing operation, for example, the screening before the medium and fine crushing machines plays roles of pre-screening and checking screening, so that the checking screening can improve the utilization condition of crushing equipment, and the closed cycle work is similar to the closed cycle work of a classifier and an ore grinding machine so as to improve the ore grinding efficiency.

However, no matter the screening machine used for pre-screening or checking screening has certain defects, firstly, the screening holes of the existing screening equipment are easily blocked by materials, and the materials are difficult to remove after being blocked, so that the screening efficiency of the screening equipment is reduced, secondly, when the existing screening equipment screens the materials, the screened materials are easy to directly slide from the screening plate into a trough, so that the screening efficiency is reduced, and finally, when the existing screening equipment adds the materials, most of the existing screening equipment directly pours the materials onto the screening plate, so that the screening plate is easy to be damaged by impact, meanwhile, the large materials positioned at the bottommost layer are easy to block the screening holes, so that the small materials above are insufficiently screened, the screening efficiency is also reduced, and in order to solve the problems, the mining coal screening device is provided.

Disclosure of Invention

The invention mainly aims to provide a mining coal screening device, which can effectively solve the problems in the background technology: the easy material of screening hole of current screening equipment is blockked up, and be difficult to get rid of the material after blockking up, reduce screening equipment's screening efficiency like this, secondly current screening equipment is when sieving the material, the easy directness of material of screening falls into the silo from the screening board, the efficiency that also can lead to the screening like this reduces, and finally, current screening equipment is when adding the material, most directness falls the material on the screening board, easily lead to the screening board to be damaged by the striking like this, the hole is easily plugged up in the screening to the large-scale material that lies in the bottom layer simultaneously, the small-size material screening that leads to the top is not abundant, reduce screening efficiency equally.

In order to achieve the purpose, the invention adopts the technical scheme that:

a mining coal screening device comprises a machine body, wherein an air pump is fixedly mounted on the left side of the machine body, a partition plate is fixedly mounted inside the machine body, an air groove is formed in the machine body and positioned on the left side of the partition plate, a screening mechanism is arranged in the machine body and positioned on the right side of the partition plate, a buffer mechanism is arranged in the machine body and positioned above the screening mechanism, and a control screen is fixedly mounted on the right side of the machine body;

the screening mechanism comprises an outer shell, supporting blocks are fixedly mounted at the bottoms of two ends of the outer shell, transverse plates are fixedly mounted on the opposite sides of the two supporting blocks, a screening plate is fixedly mounted in the middle of the outer shell, screening openings are uniformly formed in the upper surface of the screening plate at intervals, a buffer rod is arranged on the upper surface of the screening plate and between the two rows of screening openings, anti-blocking bulges are fixedly mounted on the extension portions of the screening openings, the outer surfaces of the anti-blocking bulges are annular, and the outer surfaces of the anti-blocking bulges are smooth;

the screening device comprises a screening opening, a flexible pad, a sleeve rod, a buffer rod, a magnet and a magnet, wherein the flexible pad is fixedly mounted on the upper side of the inner edge of the screening opening, the screening opening is in an inverted bowl shape, the inner wall of the screening opening is smooth, a sliding groove is formed in the upper surface of a screening plate and between two rows of the screening openings, the bottom of the sliding groove is fixedly provided with the second magnet and the sleeve rod, the outer surface of the sleeve rod is movably sleeved with the outer sleeve, the bottom of the outer surface of the buffer rod is fixedly connected with the outer sleeve, the first magnet is fixedly mounted at the bottom of the buffer rod, the first magnet is magnetically repelled with the second magnet, and the outer surface of the buffer rod is smooth;

the right side fixed mounting of baffle has the connecting rod, two the sliding tray has been seted up to the one side of the back to back of diaphragm, the bottom fixed mounting of sliding tray has reset spring, the right-hand member fixed mounting of connecting rod has the limiting plate, the right side and the reset spring fixed connection of limiting plate, the surface and the sliding tray sliding connection of limiting plate, the bottom fixed mounting of diaphragm has a rack.

The invention has the further improvement that the left side of the air groove is provided with an air inlet, the output end of the air pump is communicated with the air inlet, the right side surface of the clapboard is provided with an air guide port which is communicated with the air groove, the air blowing angle of the air guide port is parallel to the sieving plate, the right side of the clapboard and the lower part of the air guide port are fixedly provided with a second clamping plate, a clamping groove is arranged between the second clamping plate and the transverse plate, the transverse plate is positioned in the clamping groove, so that the sieving mechanism and the machine body are matched for use, the driving motor drives the fixing ring to rotate, the annular rack on the surface of the fixing ring is meshed with the first rack for transmission, the transverse plate and the sieving plate are driven by the connecting rod, the reset spring and the annular rack to vibrate in two dimensions, meanwhile, the inner edge of the sieving port is in the shape of an inverted bowl, and the inner edge of the sieving port is smooth, small-size material can not block at the middle part of screening mouth when getting into the middle part of screening mouth like this, and the epitaxial fixed mounting of screening mouth has flexible pad and annular to prevent stifled arch, a part card of large-scale material is when the inside of screening mouth like this, because there is not firm strong point, under the air pump with blowing of leading the gas port, because the angle that the gas of leading the gas port blew off is parallel with the screening board, large-scale material card can be shifted out under vibration and gaseous combined action at the inside part of screening mouth, can prevent like this that the material from blocking up the screening mouth, with increase screening efficiency, can prevent the raise dust simultaneously, better practicality and creativity have.

The invention is further improved in that a driving motor is fixedly arranged on the right side of the partition plate and below the second clamping plate, the output end of the driving motor is in transmission connection with a connecting rod, a fixing ring is fixedly sleeved on the outer surface of the connecting rod, an annular rack is fixedly arranged on the outer surface of the fixing ring, the annular rack only occupies half of the outer surface of the fixing ring, the annular rack is in meshing transmission with the first rack, and the input end of the driving motor is electrically connected with the control screen.

The improved structure of the engine body is characterized in that a groove is formed in the right side of the interior of the engine body, a buffer spring is fixedly mounted at the bottom of the interior of the groove, a buffer rod is connected to the inner surface of the groove in a sliding mode, the left end of the buffer rod penetrates through the groove and is fixedly provided with a buffer cushion, a fixing plate is fixedly mounted on the right side of the interior of the engine body and above the buffer rod, and the buffer cushion is wedge-shaped.

The invention is further improved in that the buffer mechanism comprises a buffer plate, the right end of the buffer plate is rotatably connected with a rotating rod, the end part of the rotating rod is fixedly connected with a fixed plate, the upper surface of the right end of the buffer plate is fixedly provided with an elastic rope, the end part of the elastic rope, which is far away from one end of the buffer plate, is fixedly connected with the machine body, the bottom surface of the buffer plate is movably contacted with a buffer pad, the end part of the left end of the buffer plate is in a wedge shape, the upper surface of the buffer plate is provided with a collision groove, the inner surface of the collision groove is fixedly provided with a rubber cushion, the left end of the buffer plate is positioned right above the screening mechanism, materials fall on the way of falling from the feed inlet to the screening mechanism firstly on the upper surface of the collision groove of the buffer plate, the elastic rope, the buffer pad, the buffer rod and the buffer spring provide buffer for the falling process so as to reduce the speed of the materials, the screening plate is protected, and meanwhile, materials can uniformly fall on the upper surface of the screening plate, so that the screening efficiency is improved.

The improved structure of the collision tank comprises a partition plate, a first clamping plate, a first material groove, a second material groove, a material outlet groove, a screening mechanism, a second material groove, a support plate and a collision groove.

The invention further improves the mining coal screening device, and the using method comprises the following steps:

a: the control screen is powered on, the control screen controls the driving motor and the air pump to work, the air output by the air pump is parallel to the screening plate through the blowing angles of the air guide port, the air groove and the air inlet, materials enter the machine body from the feed port, the output end of the feed port is positioned right above the collision groove, the solid materials firstly fall on the upper surface of the collision groove of the buffer plate on the way of falling the screening mechanism from the feed port, the right end of the buffer rod slides in the groove, the elastic rope is stretched, and the elastic rope, the buffer pad, the rubber cushion, the buffer rod and the buffer spring buffer the falling process to reduce the falling speed of the materials and protect the screening plate, meanwhile, the materials can uniformly fall on the upper surface of the screening plate, and screening efficiency is improved;

b, after the step A is finished, the materials uniformly fall on the upper surface of the screening plate, the driving motor drives the fixing ring to rotate through the connecting rod, the annular rack on the surface of the fixing ring is in meshed transmission with the first rack, because the annular rack is semi-annular, the transverse plate and the screening plate are driven by the connecting rod, the reset spring and the annular rack to vibrate in two dimensions, meanwhile, the inner edge of the screening opening is in an inverted bowl mouth shape, the inner edge of the screening opening is smooth, so that small materials cannot be clamped in the middle of the screening opening when entering the middle of the screening opening, a flexible pad and an annular anti-blocking bulge are fixedly arranged on the extension of the screening opening, so that when one part of large materials is clamped in the screening opening, because of no stable supporting point, under the blowing action of the air pump and the air guide port, because the air blowing angle of the air guide port is parallel to the screening plate, the part of the large materials clamped in the screening opening can be moved out under the combined action of vibration and air, thus, the material can be prevented from blocking the screening opening, the screening efficiency is increased, and meanwhile, dust can be prevented from flying;

and C, after the step B is finished, when the material slides on the upper surface of the screening mechanism, the outer sleeve slides on the outer surface of the sleeve rod, the sliding speed of the material can be reduced due to the action of the buffer rod, the first magnet and the second magnet, large materials and small materials are sufficiently separated, the screening efficiency is increased, large particles enter the second material groove from the discharge groove, small particles enter the first material groove in the middle of the first clamping plate, and the screening of the material is finished.

Compared with the prior art, the invention has the following beneficial effects:

1. the screening mechanism is matched with the machine body for use, the driving motor drives the fixing ring to rotate, the annular rack on the surface of the fixing ring is meshed with the first rack for transmission, the annular rack is semi-annular, so that the transverse plate and the screening plate can vibrate in two dimensions under the driving of the connecting rod, the reset spring and the annular rack, the inner edge of the screening port is in a reversed bowl shape, the inner edge of the screening port is smooth, small materials cannot be clamped in the middle of the screening port when entering the middle of the screening port, the flexible pad and the annular anti-blocking bulge are fixedly arranged on the extension of the screening port, and therefore when one part of large materials is clamped in the screening port, due to the fact that no stable supporting point exists, under the blowing of the air pump and the air guide port, the angle of the air blown out of the air guide port is parallel to the screening plate, the part of the large materials clamped in the screening port can be moved out under the combined action of vibration and air, can prevent like this that the material from blockking up the screening mouth to increase screening efficiency, can prevent the raise dust simultaneously, have better practicality and creativity.

2. Through the screening mechanism and the buffer gear cooperation use that set up, the material is on the way by the feed inlet screening mechanism that drops, drop the upper surface in the collision groove of buffer board earlier, the elasticity rope, the blotter, the buffer bar, rubber cushion and buffer spring provide the buffering to the descending process, in order to reduce the descending speed of material, provide the protection to the screening board, can make the material evenly fall on the upper surface of screening board simultaneously, increase screening efficiency, secondly the material is when the upper surface slip of screening mechanism, the overcoat is at the surface slip of loop bar, because the buffer bar, the effect of magnet and No. two magnets, can reduce the landing speed of material, make large-scale material of material and small-size material fully separate, in order to increase screening efficiency, better practicality and creativity have.

Drawings

FIG. 1 is a schematic overall structure diagram of a mining coal screening device of the invention.

FIG. 2 is a schematic structural diagram of a screening mechanism of the mining coal screening device.

FIG. 3 is a schematic view of the connection between the screening mechanism and the partition plate of the coal screening device for mining of the present invention.

FIG. 4 is a schematic diagram of a buffering mechanism of the coal screening device for mining.

FIG. 5 is a schematic structural diagram of a screening plate of the coal screening device for mining.

FIG. 6 is a schematic sectional view of a screen plate structure of the coal screening device for mining.

In the figure: 1. a body; 2. an air pump; 3. a partition plate; 4. an air tank; 5. a screening mechanism; 6. a buffer mechanism; 7. an air guide port; 8. a first trough; 9. a first clamping plate; 10. a discharge chute; 11. a second trough; 12. a control screen; 13. an air inlet; 14. a feed inlet; 15. a support plate; 16. a drive motor; 17. a connecting rod; 18. a fixing ring; 19. an annular rack; 20. a connecting rod; 21. a limiting plate; 22. a second splint; 23. a clamping groove; 101. a groove; 102. a buffer spring; 103. a fixing plate; 104. a buffer rod; 105. a cushion pad; 501. a support block; 502. a transverse plate; 503. a screening plate; 504. a buffer rod; 505. a screening port; 506. anti-blocking protrusions; 507. an outer housing; 508. a return spring; 509. a first rack; 510. a flexible pad; 511. a chute; 512. a jacket; 513. a first magnet; 514. a magnet II; 515. a loop bar; 601. an elastic cord; 602. a rotating rod; 603. a buffer plate; 604. a collision groove; 605. a rubber cushion.

Detailed Description

In order to make the technical means, the original characteristics, the achieved objects and the functions of the present invention easy to understand, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus not be construed as limiting the present invention. Furthermore, the terms "a," "an," "two," and "three" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The invention will be further illustrated with reference to specific embodiments.

Example 1

As shown in fig. 1-6, a mining coal screening device comprises a machine body (1), wherein an air pump (2) is fixedly installed on the left side of the machine body (1), a partition plate (3) is fixedly installed inside the machine body (1), an air groove (4) is formed in the machine body (1) and positioned on the left side of the partition plate (3), a screening mechanism (5) is arranged inside the machine body (1) and positioned on the right side of the partition plate (3), a buffer mechanism (6) is arranged inside the machine body (1) and positioned above the screening mechanism (5), and a control screen (12) is fixedly installed on the right side of the machine body (1);

the screening mechanism (5) comprises an outer shell (507), supporting blocks (501) are fixedly mounted at the bottoms of two ends of the outer shell (507), transverse plates (502) are fixedly mounted on one opposite sides of the two supporting blocks (501), a screening plate (503) is fixedly mounted in the middle of the outer shell (507), screening openings (505) are uniformly formed in the upper surface of the screening plate (503) at intervals, buffer rods (504) are arranged on the upper surface of the screening plate (503) and between the two rows of screening openings (505), anti-blocking protrusions (506) are fixedly mounted on the extension of the screening openings (505), the outer surfaces of the anti-blocking protrusions (506) are annular, and the outer surfaces of the anti-blocking protrusions (506) are smooth;

the upper side of the inner edge of the screening opening (505) is fixedly provided with a flexible pad (510), the screening opening (505) is arranged in an inverted bowl shape, the inner wall of the screening opening (505) is smooth, a sliding groove (511) is formed in the upper surface of the screening plate (503) and is positioned between the two rows of screening openings (505), the bottom of the sliding groove (511) is fixedly provided with a second magnet (514) and a sleeve rod (515), the outer surface of the sleeve rod (515) is movably sleeved with an outer sleeve (512), the bottom of the outer surface of the buffer rod (504) is fixedly connected with the outer sleeve (512), the bottom of the buffer rod (504) is fixedly provided with a first magnet (513), the first magnet (513) is magnetically repelled with the second magnet (514), and the outer surface of the buffer rod (504) is smooth;

the right side fixed mounting of baffle (3) has connecting rod (20), and the sliding tray has been seted up to the one side of two diaphragm (502) back to back, and the bottom fixed mounting of sliding tray has reset spring (508), and the right-hand member fixed mounting of connecting rod (20) has limiting plate (21), the right side and reset spring (508) fixed connection of limiting plate (21), the surface and the sliding tray sliding connection of limiting plate (21), the bottom fixed mounting of diaphragm (502) has a rack (509).

Air inlet (13) have been seted up in the left side of air duct (4), the output of air pump (2) switches on with air inlet (13), air guide port (7) have been seted up to the right flank of baffle (3), air guide port (7) switch on with air duct (4), the angle that the gas of air guide port (7) blown out is parallel with screening board (503), the right side of baffle (3) just is located the below fixed mounting of air guide port (7) and has No. two splint (22), centre gripping groove (23) have been seted up between two No. two splint (22), diaphragm (502) are located the inside in centre gripping groove (23).

The right side of baffle (3) and the below fixed mounting that is located No. two splint (22) have driving motor (16), the output transmission of driving motor (16) is connected with connecting rod (17), the fixed cover of surface of connecting rod (17) has solid fixed ring (18), the fixed surface of solid fixed ring (18) installs annular rack (19), annular rack (19) account for only the half of the surface of solid fixed ring (18), annular rack (19) and rack (509) meshing transmission, the input and the control panel (12) electric connection of driving motor (16).

By adopting the technical scheme: the screening mechanism (5) and the machine body (1) are matched for use, the driving motor (16) drives the fixing ring (18) to rotate, the annular rack (19) on the surface of the fixing ring (18) is meshed with the first rack (509) for transmission, and the annular rack (19) is semi-annular, so that the transverse plate (502) and the screening plate (503) vibrate in two dimensions under the driving of the connecting rod (20), the reset spring (508) and the annular rack (19), meanwhile, the inner edge of the screening opening (505) is in a reversed bowl-mouth shape, and the inner edge of the screening opening (505) is smooth, so that small materials cannot be clamped in the middle of the screening opening (505) when entering the middle of the screening opening (505), and the extension of the screening opening (505) is fixedly provided with the anti-blocking cushion (510) and the annular anti-blocking bulge (506), so that a part of large materials are clamped in the screening opening (505), and have no stable supporting point, under the blowing of air pump (2) and air guide port (7), because the angle that the gas of air guide port (7) blew off is parallel with screening board (503), the part that large-scale material card is inside at screening mouth (505) can be shifted out under the combined action of vibration and gas, can prevent like this that the material from blockking up screening mouth (505) to increase screening efficiency, can prevent the raise dust simultaneously, have better practicality and creativity.

Example 2

The right side of the inside of organism (1) is seted up flutedly (101), the interior bottom fixed mounting of recess (101) has buffer spring (102), the internal surface sliding connection of recess (101) has buffer beam (104), the left end of buffer beam (104) passes recess (101) and fixed mounting has blotter (105), the right side of the inside of organism (1) and the top fixed mounting that is located buffer beam (104) have fixed plate (103), the shape of blotter (105) is for carving the type.

The buffer mechanism (6) comprises a buffer plate (603), the right end of the buffer plate (603) is rotatably connected with a rotating rod (602), the end part of the rotating rod (602) is fixedly connected with the fixed plate (103), the upper surface of the right end of the buffer plate (603) is fixedly provided with an elastic rope (601), the end part of one end, far away from the buffer plate (603), of the elastic rope (601) is fixedly connected with the machine body (1), the bottom surface of the buffer plate (603) is movably contacted with the buffer cushion (105), the end part of the left end of the buffer plate (603) is of a wedge type, the upper surface of the buffer plate (603) is provided with a collision groove (604), the inner surface of the collision groove (604) is fixedly provided with a rubber cushion (605), the left end of the buffer plate (603) is positioned right above the screening mechanism (5), so that materials fall onto the upper surface of the collision groove (604) of the buffer plate (603) on the way of the screening mechanism (5) falling from the feed inlet (14), elastic rope (601), blotter (105), rubber cushion (605), buffer pole (104) and buffer spring (102) provide and provide the buffering to descending process to reduce the descending speed of material, provide the protection to screening board (503), can make the material evenly fall on the upper surface of screening board (503) simultaneously, increase screening efficiency.

The right side of baffle (3) and the below fixed mounting that is located driving motor (16) have splint (9) No. one, silo (8) have been installed No. one to the internal fixed surface of splint (9), blown down tank (10) have been seted up on the right side of organism (1), the bottom and blown down tank (10) of screening mechanism (5) switch on, the right side of organism (1) and the below fixed mounting that is located blown down tank (10) have silo (11) No. two, the last fixed surface of organism (1) installs feed inlet (14), the both sides fixed mounting of feed inlet (14) has backup pad (15), the output of feed inlet (14) is located collision groove (604) directly over.

By adopting the technical scheme: through the matching use of the screening mechanism (5) and the buffer mechanism (6), materials firstly fall on the upper surface of a collision groove (604) of a buffer plate (603) on the way of falling the screening mechanism (5) from a feeding hole (14), the elastic rope (601), the buffer pad (105), the buffer rod (104) and the buffer spring (102) buffer the falling process to reduce the falling speed of the materials and protect the screening plate (503), meanwhile, the materials can uniformly fall on the upper surface of the screening plate (503) to increase the screening efficiency, when the materials slide on the upper surface of the screening mechanism (5), the outer sleeve (512) slides on the outer surface of the sleeve rod (515), and due to the action of the buffer rod (504), the first magnet (513) and the second magnet (514), the falling speed of the materials can be reduced, so that large materials and small materials are sufficiently separated to increase the screening efficiency, has better practicability and creativity.

The invention is a mining coal screening device, when in use, firstly, a control screen (12) is connected with a power supply, a driving motor (16) and an air pump (2) are controlled to work through the control screen (12), the angle of air output by the air pump (2) blown out through an air guide port (7), an air groove (4) and an air inlet (13) is parallel to a screening plate (503), materials enter the machine body (1) from a feed port (14), the materials firstly fall on the upper surface of a collision groove (604) of a buffer plate (603) on the way that the materials fall from the feed port (14) into a screening mechanism (5) because the output end of the feed port (14) is positioned right above the collision groove (604), the right end of a buffer rod (104) slides in a groove (101), the elastic rope (601) is lengthened, the elastic rope (601), the buffer cushion (105), the buffer rod (104) and a buffer spring (102) buffer the falling process, the falling speed of the materials is reduced, the screening plate (503) is protected, meanwhile, the materials can uniformly fall on the upper surface of the screening plate (503), the screening efficiency is improved, secondly, the materials uniformly fall on the upper surface of the screening plate (503), the driving motor (16) drives the fixing ring (18) to rotate through the connecting rod (17), the annular rack (19) on the surface of the fixing ring (18) is in meshing transmission with the first rack (509), because the annular rack (19) is semi-annular, the transverse plate (502) and the screening plate (503) are driven by the connecting rod (20), the return spring (508) and the annular rack (19) to vibrate in two dimensions, meanwhile, the inner edge of the screening opening (505) is in a reversed bowl shape, and the inner edge of the screening opening (505) is smooth, so that small materials cannot be clamped in the middle of the screening opening (505) when entering the middle of the screening opening, and the extension of the screening opening (505) is fixedly provided with the flexible pad (510) and the annular anti-blocking bulge (506), therefore, when one part of the large material is clamped in the screening opening (505), because of no stable supporting point, under the blowing of the air pump (2) and the air guide opening (7), because the air blowing angle of the air guide opening (7) is parallel to the screening plate (503), the part of the large material clamped in the screening opening (505) can be moved out under the combined action of vibration and air, so that the screening opening (505) can be prevented from being blocked by the material, the screening efficiency can be increased, meanwhile, the dust can be prevented from flying, finally, when the material slides on the upper surface of the screening mechanism (5), the outer sleeve (512) slides on the outer surface of the sleeve rod (515), because of the actions of the buffer rod (504), the first magnet (513) and the second magnet (514), the sliding speed of the material can be reduced, the large material and the small material can be fully separated, the screening efficiency can be increased, and the large particulate matter can enter the second trough (11) from the discharge groove (10), and the small particles enter a material groove (8) in the middle of a clamping plate (9), so that the material is screened.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A mining coal screening plant which characterized in that: the air pump is fixedly arranged on the left side of the machine body, a partition plate is fixedly arranged in the machine body, an air groove is formed in the machine body and positioned on the left side of the partition plate, a screening mechanism is arranged in the machine body and positioned on the right side of the partition plate, a buffer mechanism is arranged in the machine body and positioned above the screening mechanism, and a control screen is fixedly arranged on the right side of the machine body;

2. A mining coal screening device as claimed in claim 1, characterized in that: the air inlet has been seted up in the left side of air pocket, the output and the air inlet of air pump switch on, the gas port has been seted up to the right flank of baffle, it switches on with the air pocket to lead the gas port, the angle that the gas of leading the gas port blew out is parallel with the screening board, the right side of baffle and the below fixed mounting that is located the gas port have No. two splint, two the centre gripping groove has been seted up between No. two splint, the diaphragm is located the inside in centre gripping groove.

3. A mining coal screening device as claimed in claim 2, characterized in that: the right side of baffle and the below fixed mounting that is located No. two splint have driving motor, driving motor's output transmission is connected with the connecting rod, the fixed surface cover of connecting rod has connect solid fixed ring, gu fixed ring's fixed surface installs annular rack, annular rack only accounts for solid fixed ring's surface half, annular rack and rack toothing transmission, driving motor's input and control panel electric connection.

4. A mining coal screening device as claimed in claim 1, characterized in that: the right side of the inside of organism has seted up the recess, the interior bottom fixed mounting of recess has buffer spring, the internal surface sliding connection of recess has the buffer beam, the left end of buffer beam passes the recess and fixed mounting has the blotter, the right side of the inside of organism and the top fixed mounting that is located the buffer beam have the fixed plate, the shape of blotter is for carving the type.

5. A mining coal screening device as claimed in claim 4, characterized in that: the buffer mechanism comprises a buffer plate, the right end of the buffer plate is rotatably connected with a rotating rod, the end part of the rotating rod is fixedly connected with a fixed plate, an elastic rope is fixedly arranged on the upper surface of the right end of the buffer plate, the end part of the elastic rope, far away from one end of the buffer plate, is fixedly connected with a machine body, the bottom surface of the buffer plate is movably contacted with a buffer pad, the end part of the left end of the buffer plate is of a wedge type, a collision groove is formed in the upper surface of the buffer plate, a rubber cushion is fixedly arranged on the inner surface of the collision groove, the left end of the buffer plate is positioned right above the screening mechanism, materials are arranged on the way of falling the screening mechanism from a feed inlet and firstly fall on the upper surface of the collision groove of the buffer plate, the elastic rope, the buffer pad, the buffer rod and the buffer spring provide buffering for the falling process so as to reduce the falling speed of, meanwhile, the materials can uniformly fall on the upper surface of the screening plate, and the screening efficiency is improved.

6. A mining coal screening device as claimed in claim 5, characterized in that: the right side of baffle and the below fixed mounting that is located driving motor have splint No. one, the internal fixed surface of splint installs the silo No. one, the blown down tank has been seted up on the right side of organism, the bottom and the blown down tank of screening mechanism switch on, the right side of organism and the below fixed mounting that is located the blown down tank have the silo No. two, the last fixed surface of organism installs the feed inlet, the both sides fixed mounting of feed inlet has the backup pad, the output of feed inlet is located the collision groove directly over.

7. A mining coal screening device as claimed in any one of claims 1 to 6, wherein: the using method comprises the following steps:

a: the control screen is powered on, the control screen controls the driving motor and the air pump to work, the air output by the air pump is parallel to the screening plate through the blowing angles of the air guide port, the air groove and the air inlet, materials enter the machine body from the feed port, the output end of the feed port is positioned right above the collision groove, the solid materials firstly fall on the upper surface of the collision groove of the buffer plate on the way of falling the screening mechanism from the feed port, the right end of the buffer rod slides in the groove, the elastic rope is stretched, the elastic rope, the rubber cushion, the buffer rod and the buffer spring buffer the falling process, so that the falling speed of the materials is reduced, the screening plate is protected, meanwhile, the materials can uniformly fall on the upper surface of the screening plate, and the screening efficiency is improved;