CN215612272U - Automatic multi-stage screening device for coal - Google Patents
Automatic multi-stage screening device for coal Download PDFInfo
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- CN215612272U CN215612272U CN202120285146.0U CN202120285146U CN215612272U CN 215612272 U CN215612272 U CN 215612272U CN 202120285146 U CN202120285146 U CN 202120285146U CN 215612272 U CN215612272 U CN 215612272U
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Abstract
The utility model provides an automatic multi-stage screening device for coal, which comprises a shell, wherein the interior of the shell is divided into a crushing section and a screening section from top to bottom along the flow direction of the coal; the crushing section is internally provided with at least two pressure rollers, the peripheral surfaces of the pressure rollers are provided with crushing teeth, and the crushing teeth on two adjacent pressure rollers are meshed with each other and used for crushing coal; at least two stepped sieve plates are arranged in the screening section, and the stepped sieve plates are continuously arranged in a Z shape; two ends of the stepped sieve plate are respectively marked as a feeding end and a discharging end, each step in the stepped sieve plate is downwards step by step from the feeding end to the discharging end, and the feeding end is externally connected with a driving motor; from top to bottom, the sieve mesh aperture on the ladder sieve at different levels diminishes progressively. The utility model replaces the traditional straight plate type screen with the stepped screen plate, prolongs the retention time of coal particles on the screen plate and further improves the screening efficiency.
Description
Technical Field
The utility model belongs to the technical field of coal screening, and relates to an automatic multi-stage screening device for coal.
Background
Coal is fossil fuel which is most abundant in storage amount on the earth and has the widest distribution region, is known as black gold by people, is industrial food, is one of main energy sources used in the human world in the eighteenth century, and has an important position in terms of coal processing.
And only smashing coal can cause the size of the coal particles after smashing to be different, thereby greatly reducing the precision of coal smashing, influencing the coal smashing quality and being inconvenient for downstream process use. Therefore, it is necessary to screen the crushed coal and classify the crushed coal according to the particle size.
The coal screening device is a mechanical device specially used for screening coal, most of the existing coal screening devices adopt an inclined plane design of a screening sieve to complete screening and collection by depending on the gravity of the coal, the other screening devices adopt a vibrating sieve to carry out vibration screening, and the two screening modes have different defects; when the vibrating screen is used for screening coal, when the volume of the coal is too large and the quantity of the coal is too large, the vibration rolling amplitude of the coal is limited, a good screening effect cannot be achieved, the granularity of the coal is smaller and smaller after the coal is screened, coal dust is inevitably generated, the coal with small granularity is directly collected in the cavity by the conventional device, and the air pollution caused by the coal dust is possibly caused. That is, the screening effect of the existing coal screening device on coal has different defects under different scenes, which often results in that small-particle size coal which should pass through the screening holes is collected without being screened, and the existing coal screening device cannot repeatedly and circularly screen for many times, and the ash removal treatment of the small-particle size coal is not considered.
CN107597269A discloses coal is smashed and is ground screening all-in-one, comprising a base plate, the box with remove the wheelset, be provided with reducing mechanism in the box, grinder and sieving mechanism, the top of box is provided with the feed inlet, reducing mechanism is including smashing the motor, initiatively smash roller and passive crushing roller, grinder is including grinding the motor, the compression roller, grinding roller and backing roll, sieving mechanism includes the one-level screen cloth, the second grade screen cloth, tertiary screen cloth, shock motor and vibrations axle, the lower extreme department of tertiary screen cloth is provided with the feed back case, the material lifting cylinder is installed to feed back case top, the top slope of material lifting cylinder is provided with the passage, the bottommost end and the feed inlet of passage are linked together, the bottom at the bottom plate is installed to the removal wheelset.
CN207614907U discloses coal is smashed and is ground screening all-in-one, comprising a base plate, the box with remove the wheelset, be provided with reducing mechanism in the box, grinder and sieving mechanism, reducing mechanism is including smashing the motor, crushing axle, puddler and (mixing) shaft, be provided with crushing tooth on the (mixing) shaft, grinder is including grinding the motor, the compression roller, grinding roller and backing roll, sieving mechanism includes the one-level screen cloth, the second grade screen cloth, tertiary screen cloth, shock motor and vibrations axle, the lower extreme department of tertiary screen cloth is provided with the feed back case, the material lifting cylinder is installed to feed back case top, the top slope of material lifting cylinder is provided with the passage, the bottom and the feed inlet of passage are linked together, the bottom at the bottom plate is installed to the removal wheelset.
CN210058523U discloses screening device is smashed to coal in mining field, including the main casing body, supporting leg, row's material section of thick bamboo, support column, protective housing, first motor, first crushing axle, first crushing sword, second crushing axle, second crushing sword, first bevel gear, second bevel gear, feeding shell, limiting plate, filter, filtration hole, fixed column, set casing, spring, baffle, second motor, output shaft and lug.
Coal is used in various industries under industrial development, but volume requirements of the coal in use are different, and the coal crushing device is required to crush and process the coal for use with different requirements, but the existing coal crushing device cannot flexibly adjust crushing and process the coal according to the volume requirements of different coals, so that the situation that part of the coal cannot be used in some places after being crushed and processed is caused.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide the automatic multi-stage screening device for the coal.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an automatic multi-stage screening device for coal.
The coal crushing device is characterized in that at least two pressure rollers are arranged in the crushing section, crushing teeth are arranged on the outer peripheral surfaces of the pressure rollers, and the crushing teeth on two adjacent pressure rollers are meshed with each other and used for crushing coal.
At least two stepped sieve plates are arranged in the screening section, and the stepped sieve plates are continuously arranged in a Z shape; the two ends of the stepped sieve plate are respectively marked as a feeding end and a discharging end, each step in the stepped sieve plate is downwards step by step from the feeding end to the discharging end, the feeding end is externally connected with a driving motor, the driving motor is used for driving the stepped sieve plate to reciprocate in the horizontal direction, and the coal is driven to roll from the feeding end to the discharging end step by step under the motion of the stepped sieve plate; from top to bottom, the sieve mesh aperture on the ladder sieve at different levels diminishes progressively.
The utility model provides an automatic multi-stage screening device for coal, which is characterized in that falling coal gradually rolls down along a stepped sieve plate under the action of gravity through the stepped sieve plate arranged in a Z shape, a traditional straight plate type screen is replaced by the stepped sieve plate, the residence time of coal particles on the sieve plate is prolonged, and therefore the screening efficiency is improved.
As a preferable technical scheme of the utility model, the stepped sieve plate comprises at least one vertical partition plate and at least one horizontal sieve plate, sieve holes are distributed on the horizontal sieve plate, and the vertical partition plate and the horizontal sieve plate are distributed at intervals and then are sequentially butted to form a stepped structure.
As a preferred technical solution of the present invention, three step sieve plates are disposed in the screening section, and are respectively marked as a first step sieve plate, a second step sieve plate and a third step sieve plate from top to bottom.
The sieve pore diameter of the horizontal sieve plate included in the first step sieve plate is larger than that of the horizontal sieve plate included in the second step sieve plate is larger than that of the horizontal sieve plate included in the third step sieve plate.
As a preferable technical solution of the present invention, the outer periphery of the stepped sieve plate is provided with a baffle.
In a preferred embodiment of the present invention, the horizontal screen deck included in the first cascade screen deck has a screen aperture of 30 to 40mm, for example, 30mm, 31mm, 32mm, 33mm, 34mm, 3mm, 36mm, 37mm, 38mm, 39mm or 40mm, but the screen aperture is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
The screen aperture of the horizontal screen plate included in the second cascade screen plate is 20-30 mm, for example, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm or 30mm, but the screen aperture is not limited to the values listed, and other values not listed in the numerical range are also applicable.
The screen aperture of the horizontal screen plate included in the third step screen plate is 10-20 mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable.
As a preferable technical scheme of the utility model, the discharge end of the stepped sieve plate extends out of the shell and is butted with the conveying device.
The conveying device is a belt conveyor.
One end of the belt conveyor is in butt joint with the discharge end of the stepped sieve plate, and the other end of the belt conveyor is in butt joint with the receiving bucket.
As a preferable technical scheme, the top of the shell is provided with a feed hopper, and the discharge end at the bottom of the feed hopper is communicated with the shell.
The feed hopper be back taper structure.
As a preferable technical scheme of the utility model, the discharge end at the bottom of the feed hopper is provided with a flow dividing rotating plate.
The reposition of redundant personnel commentaries on classics board include that rotation axis and equidistance are fixed in the at least three flow distribution plate of rotation axis periphery, the axial perpendicular to feeding direction of rotation axis, the long limit one side of flow distribution plate along the axial fixity of rotation axis.
In the utility model, the shunt rotating plate is arranged to have the following functions: on one hand, large coal particles are primarily smashed, so that the pressure roller is prevented from being damaged; on the other hand, the coal that falls is broken up through the rotation of reposition of redundant personnel commentaries on classics board, prevents that coal from piling up to the bottom discharge end of feeder hopper.
One end of the rotating shaft is externally connected with a rotating motor, and the rotating motor drives the rotating shaft to rotate.
As a preferred technical solution of the present invention, two rows of pressure rollers are disposed in the crushing section, and are respectively marked as a first pressure roller set and a second pressure roller set from top to bottom.
The first pressure roller group comprises n pressure rollers which are arranged side by side in the horizontal direction, wherein n is more than or equal to 2.
The second pressure roller group comprises (n-1) pressure rollers which are arranged side by side in the horizontal direction.
The pressure rollers included in the first pressure roller group and the pressure rollers included in the second pressure roller group are distributed in a staggered mode.
As a preferable technical scheme, the shell of the crushing section is connected with an induced draft fan, and the induced draft fan is used for extracting coal dust generated in the crushing section.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides an automatic multi-stage screening device for coal, which is characterized in that falling coal gradually rolls down along a stepped sieve plate under the action of gravity through the stepped sieve plate arranged in a Z shape, a traditional straight plate type screen is replaced by the stepped sieve plate, the residence time of coal particles on the sieve plate is prolonged, and therefore the screening efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a coal crushing and screening apparatus according to an embodiment of the present invention.
Wherein, 1 is a feed hopper; 2-shunting rotating plate; 3-a shell; 4-a crushing section; 5-a pressure roll; 6-induced draft fan; 7-first step sieve plate; 8-a first drive motor; 9-a first conveying device; 10-a first receiving bucket; 11-second step sieve plate; 12-a second drive motor; 13-a second conveying device; 14-a second receiving bucket; 15-third step sieve plate; 16-a third drive motor; 17-a third conveyor; 18-a third receiving bucket; 19-screening section.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the present invention provides an automatic multi-stage screening apparatus for coal, which comprises a housing 3 as shown in fig. 1, wherein the interior of the housing 3 is divided into a crushing section 4 and a screening section 19 from top to bottom along the flow direction of the coal.
The shell of the crushing section 4 is connected with an induced draft fan 6, and the induced draft fan 6 is used for extracting coal dust generated in the crushing section 4. At least two pressure rollers 5 are arranged in the crushing section 4, crushing teeth are arranged on the peripheral surfaces of the pressure rollers 5, and the crushing teeth on the two adjacent pressure rollers 5 are meshed with each other and used for crushing coal. Specifically, two rows of pressure rollers 5 are arranged in the crushing section 4, and are respectively marked as a first pressure roller group and a second pressure roller group from top to bottom, the first pressure roller group comprises n pressure rollers 5 which are arranged side by side in the horizontal direction, wherein n is more than or equal to 2; the second pressure roller group comprises (n-1) pressure rollers 5 arranged side by side in the horizontal direction; the pressure rollers 5 comprised in the first set of pressure rollers are staggered with respect to the pressure rollers 5 comprised in the second set of pressure rollers.
At least two stepped sieve plates are arranged in the screening section 19, and the stepped sieve plates are arranged in a continuous Z shape. The both ends of ladder sieve are marked as feed end and discharge end respectively, and downward step by step to the discharge end direction by the feed end at different levels in the ladder sieve, the external driving motor of feed end, driving motor are used for driving ladder sieve reciprocating motion in the horizontal direction, drive coal and roll to the discharge end step by the feed end under the motion of ladder sieve, from top to bottom, and the sieve mesh aperture on the ladder sieve at different levels diminishes step by step.
The stepped sieve plate comprises at least one vertical partition plate and at least one horizontal sieve plate, sieve holes are distributed on the horizontal sieve plate, and the vertical partition plate and the horizontal sieve plate are sequentially butted to form a stepped structure after being distributed at intervals. The periphery of the stepped sieve plate is provided with a baffle plate. The discharge end of the stepped sieve plate extends out of the shell 3 and is in butt joint with the conveying device. Optionally, the conveying device is a belt conveyor, one end of the belt conveyor is butted with the discharge end of the stepped sieve plate, and the other end of the belt conveyor is butted with the receiving bucket.
Specifically, as shown in fig. 1, three step screens are provided in the screening section 19, and are respectively denoted as a first step screen 7, a second step screen 11, and a third step screen 15 from top to bottom, and the sieve pore diameter of the horizontal screen included in the first step screen 7 > the sieve pore diameter of the horizontal screen included in the second step screen 11 > the sieve pore diameter of the horizontal screen included in the third step screen 15. Further, the sieve pore diameter of the horizontal sieve plate included in the first stepped sieve plate 7 is 30-40 mm, the sieve pore diameter of the horizontal sieve plate included in the second stepped sieve plate 11 is 20-30 mm, and the sieve pore diameter of the horizontal sieve plate included in the third stepped sieve plate 15 is 10-20 mm.
The top of the shell 3 is provided with a feed hopper 1, the bottom discharge end of the feed hopper 1 is communicated with the shell 3, and the feed hopper 1 is of an inverted cone structure. The discharge end of the bottom of the feeding hopper 1 is provided with a shunting rotating plate 2, the shunting rotating plate 2 comprises a rotating shaft and at least three shunting plates fixed on the periphery of the rotating shaft at equal intervals, the axial direction of the rotating shaft is perpendicular to the feeding direction, one side of a long edge of each shunting plate is fixed along the axial direction of the rotating shaft, one end of the rotating shaft is externally connected with a rotating motor, and the rotating motor drives the rotating shaft to rotate.
Example 1
The present embodiment provides an automatic multistage screening apparatus for coal, which is based on an embodiment in which a first pressure roller group includes 2 pressure rollers 5 arranged side by side in a horizontal direction, and a second pressure roller group includes 1 pressure roller 5 arranged side by side in the horizontal direction.
Three step sieve plates are arranged in the screening section 19 and are respectively marked as a first step sieve plate 7, a second step sieve plate 11 and a third step sieve plate 15 from top to bottom.
The external first driving motor 8 of feed end of first ladder sieve 7, the discharge end butt joint of first conveyor 9's one end of first conveyor 7, and first receiving bucket 10 is docked to the other end of first conveyor 9.
The feed end of the second stepped sieve plate 11 is externally connected with a second driving motor 12, the discharge end of the second stepped sieve plate 11 is butted with one end of a second conveying device 13, and the other end of the second conveying device 13 is butted with a second receiving barrel 14.
The feed end of the third stepped sieve plate 15 is externally connected with a third driving motor 16, the discharge end of the third stepped sieve plate 15 is in butt joint with one end of a third conveying device 17, and the other end of the third conveying device 17 is in butt joint with a third receiving barrel 18.
The sieve pore diameter of the horizontal sieve plate included in the first stepped sieve plate 7 is 30mm, the sieve pore diameter of the horizontal sieve plate included in the second stepped sieve plate 11 is 20mm, and the sieve pore diameter of the horizontal sieve plate included in the third stepped sieve plate 15 is 10 mm.
Example 2
The present embodiment provides an automatic multistage screening apparatus for coal, which is based on an embodiment in which a first pressure roller group includes 3 pressure rollers 5 arranged side by side in a horizontal direction, and a second pressure roller group includes 2 pressure rollers 5 arranged side by side in the horizontal direction.
Three step sieve plates are arranged in the screening section 19 and are respectively marked as a first step sieve plate 7, a second step sieve plate 11 and a third step sieve plate 15 from top to bottom.
The external first driving motor 8 of feed end of first ladder sieve 7, the discharge end butt joint of first conveyor 9's one end of first conveyor 7, and first receiving bucket 10 is docked to the other end of first conveyor 9.
The feed end of the second stepped sieve plate 11 is externally connected with a second driving motor 12, the discharge end of the second stepped sieve plate 11 is butted with one end of a second conveying device 13, and the other end of the second conveying device 13 is butted with a second receiving barrel 14.
The feed end of the third stepped sieve plate 15 is externally connected with a third driving motor 16, the discharge end of the third stepped sieve plate 15 is in butt joint with one end of a third conveying device 17, and the other end of the third conveying device 17 is in butt joint with a third receiving barrel 18.
The sieve pore diameter of the horizontal sieve plate included in the first stepped sieve plate 7 is 32mm, the sieve pore diameter of the horizontal sieve plate included in the second stepped sieve plate 11 is 23mm, and the sieve pore diameter of the horizontal sieve plate included in the third stepped sieve plate 15 is 13 mm.
Example 3
The present embodiment provides an automatic multistage screening apparatus for coal, which is based on an embodiment in which a first pressure roller group includes 3 pressure rollers 5 arranged side by side in a horizontal direction, and a second pressure roller group includes 2 pressure rollers 5 arranged side by side in the horizontal direction.
Four step sieve plates are arranged in the screening section 19 and are respectively marked as a first step sieve plate 7, a second step sieve plate 11, a third step sieve plate 15 and a fourth step sieve plate from top to bottom.
The external first driving motor 8 of feed end of first ladder sieve 7, the discharge end butt joint of first conveyor 9's one end of first conveyor 7, and first receiving bucket 10 is docked to the other end of first conveyor 9.
The feed end of the second stepped sieve plate 11 is externally connected with a second driving motor 12, the discharge end of the second stepped sieve plate 11 is butted with one end of a second conveying device 13, and the other end of the second conveying device 13 is butted with a second receiving barrel 14.
The feed end of the third stepped sieve plate 15 is externally connected with a third driving motor 16, the discharge end of the third stepped sieve plate 15 is in butt joint with one end of a third conveying device 17, and the other end of the third conveying device 17 is in butt joint with a third receiving barrel 18.
The feed end of the fourth stepped sieve plate is externally connected with a fourth driving motor, the discharge end of the fourth stepped sieve plate is in butt joint with one end of a fourth conveying device, and the other end of the fourth conveying device is in butt joint with a fourth receiving barrel.
The sieve pore diameter of the horizontal sieve plate included in the first stepped sieve plate 7 is 35mm, the sieve pore diameter of the horizontal sieve plate included in the second stepped sieve plate 11 is 25mm, the sieve pore diameter of the horizontal sieve plate included in the third stepped sieve plate 15 is 15mm, and the sieve pore diameter of the horizontal sieve plate included in the fourth stepped sieve plate is 10 mm.
Example 4
The present embodiment provides an automatic multistage screening apparatus for coal, which is based on an embodiment in which a first pressure roller group includes 4 pressure rollers 5 arranged side by side in a horizontal direction, and a second pressure roller group includes 3 pressure rollers 5 arranged side by side in the horizontal direction.
Four step sieve plates are arranged in the screening section 19 and are respectively marked as a first step sieve plate 7, a second step sieve plate 11, a third step sieve plate 15 and a fourth step sieve plate from top to bottom.
The external first driving motor 8 of feed end of first ladder sieve 7, the discharge end butt joint of first conveyor 9's one end of first conveyor 7, and first receiving bucket 10 is docked to the other end of first conveyor 9.
The feed end of the second stepped sieve plate 11 is externally connected with a second driving motor 12, the discharge end of the second stepped sieve plate 11 is butted with one end of a second conveying device 13, and the other end of the second conveying device 13 is butted with a second receiving barrel 14.
The feed end of the third stepped sieve plate 15 is externally connected with a third driving motor 16, the discharge end of the third stepped sieve plate 15 is in butt joint with one end of a third conveying device 17, and the other end of the third conveying device 17 is in butt joint with a third receiving barrel 18.
The feed end of the fourth stepped sieve plate is externally connected with a fourth driving motor, the discharge end of the fourth stepped sieve plate is in butt joint with one end of a fourth conveying device, and the other end of the fourth conveying device is in butt joint with a fourth receiving barrel.
The sieve pore diameter of the horizontal sieve plate included in the first stepped sieve plate 7 is 37mm, the sieve pore diameter of the horizontal sieve plate included in the second stepped sieve plate 11 is 26mm, the sieve pore diameter of the horizontal sieve plate included in the third stepped sieve plate 15 is 17mm, and the sieve pore diameter of the horizontal sieve plate included in the fourth stepped sieve plate is 13 mm.
Example 5
The present embodiment provides an automatic multistage screening apparatus for coal, which is based on an embodiment in which a first pressure roller group includes 4 pressure rollers 5 arranged side by side in a horizontal direction, and a second pressure roller group includes 3 pressure rollers 5 arranged side by side in the horizontal direction.
Five step sieve plates are arranged in the screening section 19 and are respectively marked as a first step sieve plate 7, a second step sieve plate 11, a third step sieve plate 15, a fourth step sieve plate and a fifth step sieve plate from top to bottom.
The external first driving motor 8 of feed end of first ladder sieve 7, the discharge end butt joint of first conveyor 9's one end of first conveyor 7, and first receiving bucket 10 is docked to the other end of first conveyor 9.
The feed end of the second stepped sieve plate 11 is externally connected with a second driving motor 12, the discharge end of the second stepped sieve plate 11 is butted with one end of a second conveying device 13, and the other end of the second conveying device 13 is butted with a second receiving barrel 14.
The feed end of the third stepped sieve plate 15 is externally connected with a third driving motor 16, the discharge end of the third stepped sieve plate 15 is in butt joint with one end of a third conveying device 17, and the other end of the third conveying device 17 is in butt joint with a third receiving barrel 18.
The feed end of the fourth stepped sieve plate is externally connected with a fourth driving motor, the discharge end of the fourth stepped sieve plate is in butt joint with one end of a fourth conveying device, and the other end of the fourth conveying device is in butt joint with a fourth receiving barrel.
The feed end of the fifth stepped sieve plate is externally connected with a fifth driving motor, the discharge end of the fifth stepped sieve plate is in butt joint with one end of a fifth conveying device, and the other end of the fifth conveying device is in butt joint with a fifth receiving barrel.
The sieve pore diameter of the horizontal sieve plate included in the first stepped sieve plate 7 is 40mm, the sieve pore diameter of the horizontal sieve plate included in the second stepped sieve plate 11 is 30mm, the sieve pore diameter of the horizontal sieve plate included in the third stepped sieve plate 15 is 20mm, the sieve pore diameter of the horizontal sieve plate included in the fourth stepped sieve plate is 10mm, and the sieve pore diameter of the horizontal sieve plate included in the fifth stepped sieve plate is 5 mm.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The automatic multi-stage screening device for the coal is characterized by comprising a shell, wherein the interior of the shell is divided into a crushing section and a screening section from top to bottom along the flow direction of the coal;
the crushing section is internally provided with at least two pressure rollers, the peripheral surfaces of the pressure rollers are provided with crushing teeth, and the crushing teeth on two adjacent pressure rollers are meshed with each other and used for crushing coal;
at least two stepped sieve plates are arranged in the screening section, and the stepped sieve plates are continuously arranged in a Z shape; the two ends of the stepped sieve plate are respectively marked as a feeding end and a discharging end, each step in the stepped sieve plate is downwards step by step from the feeding end to the discharging end, the feeding end is externally connected with a driving motor, the driving motor is used for driving the stepped sieve plate to reciprocate in the horizontal direction, and the coal is driven to roll from the feeding end to the discharging end step by step under the motion of the stepped sieve plate; from top to bottom, the sieve mesh aperture on the ladder sieve at different levels diminishes progressively.
2. The automatic multi-stage screening apparatus according to claim 1, wherein said step screen deck comprises at least one vertical partition and at least one horizontal screen deck, said horizontal screen deck is provided with screen holes, said vertical partition and said horizontal screen deck are spaced apart and then sequentially connected to form a step-like structure.
3. The automatic multistage screening device of claim 1, wherein three cascade sieve plates are arranged in the screening section, and are respectively marked as a first cascade sieve plate, a second cascade sieve plate and a third cascade sieve plate from top to bottom;
the sieve pore diameter of the horizontal sieve plate included in the first step sieve plate is larger than that of the horizontal sieve plate included in the second step sieve plate is larger than that of the horizontal sieve plate included in the third step sieve plate.
4. The automated multi-stage screening apparatus of claim 1, wherein the outer periphery of said step screen deck is provided with a baffle.
5. The automatic multistage screening apparatus of claim 3, wherein the horizontal screen deck included in the first cascade screen deck has a screen aperture of 30 to 40 mm;
the second stepped sieve plate comprises a horizontal sieve plate, and the sieve pore diameter of the horizontal sieve plate is 20-30 mm;
the sieve pore diameter of the horizontal sieve plate included in the third step sieve plate is 10-20 mm.
6. The automated multi-stage screening apparatus of claim 1, wherein the discharge end of the step screen deck extends out of the housing and abuts the conveyor;
the conveying device is a belt conveyor;
one end of the belt conveyor is in butt joint with the discharge end of the stepped sieve plate, and the other end of the belt conveyor is in butt joint with the receiving bucket.
7. The automated multi-stage screening apparatus of claim 1, wherein a feed hopper is provided at a top of the housing, a bottom discharge end of the feed hopper communicating with the housing;
the feed hopper be back taper structure.
8. The automatic multistage screening apparatus of claim 7, wherein a splitter plate is provided at the discharge end of the bottom of the feed hopper;
the flow distribution rotating plate comprises a rotating shaft and at least three flow distribution plates which are fixed on the periphery of the rotating shaft at equal intervals, the axial direction of the rotating shaft is vertical to the feeding direction, and one side of the long edge of each flow distribution plate is fixed along the axial direction of the rotating shaft;
one end of the rotating shaft is externally connected with a rotating motor, and the rotating motor drives the rotating shaft to rotate.
9. The automatic multistage screening device of claim 1, wherein two rows of pressure rollers are provided in said crushing section, respectively designated as a first pressure roller set and a second pressure roller set from top to bottom;
the first pressure roller group comprises n pressure rollers which are arranged side by side in the horizontal direction, wherein n is more than or equal to 2;
the second pressure roller group comprises (n-1) pressure rollers which are arranged side by side in the horizontal direction;
the pressure rollers included in the first pressure roller group and the pressure rollers included in the second pressure roller group are distributed in a staggered mode.
10. The automatic multistage screening device of claim 1, wherein an induced draft fan is connected to the crushing section housing, and the induced draft fan is used for extracting coal dust generated in the crushing section.
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| CN202120285146.0U CN215612272U (en) | 2021-02-01 | 2021-02-01 | Automatic multi-stage screening device for coal |
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| CN202120285146.0U CN215612272U (en) | 2021-02-01 | 2021-02-01 | Automatic multi-stage screening device for coal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115025980A (en) * | 2022-06-22 | 2022-09-09 | 河南工程学院 | Mine mining is with intelligent automatic split type feeding device |
| CN115069543A (en) * | 2022-07-14 | 2022-09-20 | 河南省科学院应用物理研究所有限公司 | Intelligent coal gangue sorting device |
-
2021
- 2021-02-01 CN CN202120285146.0U patent/CN215612272U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115025980A (en) * | 2022-06-22 | 2022-09-09 | 河南工程学院 | Mine mining is with intelligent automatic split type feeding device |
| CN115069543A (en) * | 2022-07-14 | 2022-09-20 | 河南省科学院应用物理研究所有限公司 | Intelligent coal gangue sorting device |
| CN115069543B (en) * | 2022-07-14 | 2023-09-29 | 河南省科学院应用物理研究所有限公司 | Gangue intelligent sorting device |
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