CN114289289A - Screening device and screening method - Google Patents
Screening device and screening method Download PDFInfo
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- CN114289289A CN114289289A CN202111638165.8A CN202111638165A CN114289289A CN 114289289 A CN114289289 A CN 114289289A CN 202111638165 A CN202111638165 A CN 202111638165A CN 114289289 A CN114289289 A CN 114289289A
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Abstract
The invention belongs to the field of screening devices. A screening device comprising: a screening housing; the screening mechanism comprises a screen cylinder arranged in a screening shell and a material conveying assembly used for conveying materials into the screen cylinder and forming at least two blanking positions in the screen cylinder; and the output end of the driving mechanism is in transmission connection with the screen drum so as to drive the screen drum to directionally transfer the materials and screen the materials in the transfer process. Above-mentioned technical scheme for solve current screening equipment screening efficiency low technical problem. The invention also discloses a screening method, which is used for solving the technical problem of low screening efficiency of the existing screening method.
Description
Technical Field
The invention belongs to the field of screening devices, and particularly relates to a screening device and a screening method.
Background
Screening devices are used in a plurality of fields such as inspection screening of a large amount of finished bean pulp in oil engineering, raw material screening in feed engineering and the like, and the screening devices mainly utilize relative motion of bulk materials and screen surfaces to enable partial particles to penetrate through screen holes, so that the material particles are separated into different grades according to different particle sizes.
After the bean pulp in the finished product bin is stored for a period of time, part of the bean pulp generates ball materials and block materials due to condensation, conveying, extrusion and the like on the bin wall, and the ball materials and the block materials are mixed in the finished product bean pulp for sale, so that the quality of the finished product bean pulp is seriously influenced. At present, terminal customers have higher and higher requirements on the quality of bean pulp, and the screening requirements of finished bean pulp after delivery and before packaging are increasingly vigorous. In the existing grease project, after a finished bean pulp is stored in a silo for a period of time, part of ball materials and block materials are generated due to transportation and extrusion, and the materials are mixed in the finished bean pulp for sale, so that the quality of the finished bean pulp is seriously influenced.
The existing soybean meal cleaning equipment in the market mainly comprises the following devices: rolling screens and flat screens. The working part of the rolling screen is a cylindrical or conical screen cylinder, a rotating shaft is arranged along the symmetrical axis of the screen cylinder, and the whole screen cylinder rotates around the axis to realize screening. In the screening process, materials enter from the feeding end of the screen drum, but the screen mesh at the feeding end is easy to bear large load, and the screen mesh is easy to damage; meanwhile, the whole utilization rate of the screen is low, more materials are near the feeding end of the screen, the screen meshes are easy to block and deform, and the screening efficiency is low. Conventional cylinder precleaner is used for the clearance of granule material, adopts the mode of oblique feeder hopper, rotates through a sieve section of thick bamboo and realizes the screening of material, and the screening demand of large output in the grease engineering can't be satisfied to current specification.
The plane screen mainly adopts a plane screen to vibrate or rotate to screen materials on the plane screen. The screening device also has the problems that the screen is easy to damage under the condition that more materials are accumulated at the feed end, the overall utilization rate of the screen is low, screen holes are blocked and deformed, and the screening efficiency is low; meanwhile, a large floor space is occupied. In the working section, customers adopt a plane rotary grading sieve, but when the plane rotary grading sieve is used for screening powder, the floor area is large, the yield is limited, and the requirement of screening the soybean meal from a warehouse of a typical medium oil plant cannot be met.
Disclosure of Invention
The invention provides screening equipment to solve the technical problem that the screening efficiency of the existing screen is low.
In order to solve the technical problems, the invention adopts the following technical scheme that the screening equipment comprises:
a screening housing;
the screening mechanism comprises a screen cylinder arranged in a screening shell and a material conveying assembly used for conveying materials into the screen cylinder and forming at least two blanking positions in the screen cylinder;
and the output end of the driving mechanism is in transmission connection with the screen drum so as to drive the screen drum to directionally transfer the materials and screen the materials in the transfer process.
By adopting the technical scheme, the method has the following technical effects:
first, under the effect of defeated material subassembly, the material only partly can drop to a sieve section of thick bamboo mechanism front end, but another part is defeated material subassembly and forces to carry to a sieve section of thick bamboo mechanism rear end to divide the share on the screen cloth gradually, and then make whole screen cloth all be used for sieving, and can not concentrate on one, increase sieve reason area, avoid the material to extrude at a sieve section of thick bamboo mechanism front end, thereby promote the utilization ratio of screen cloth, screening plant's screening efficiency promotes greatly.
Secondly, the invention can also avoid the risks of damage and deformation of the screen due to over-weighing and blockage deformation of the screen caused by over-concentration of materials.
In order to solve the technical problem of low material conveying speed, the invention adopts the following technical scheme that a second screw is formed on the inner wall of the screen cylinder and drives the material to move along the material conveying assembly.
In order to solve the technical problem that the screen mesh is damaged due to single blanking position, the invention adopts the following technical scheme that the material conveying assembly comprises: the material conveying cylinder is at least partially arranged in the screen cylinder; a third spiral is formed on the inner wall of the material conveying cylinder; at least one group of material leaking openings are formed in the circumferential surface of the material conveying cylinder body along the axis direction.
According to the invention, the first blanking points are formed in the screen cylinder corresponding to the material conveying cylinder, the second blanking points are formed at the cylinder far away from the material conveying cylinder and are gradually distributed on the screen, so that the whole screen is used for screening and is not concentrated at one position, the utilization rate of the screen is improved, and the screening efficiency of the screening device is greatly improved.
In order to further solve the technical problem that the screen mesh is damaged due to single blanking position, the invention adopts the following technical scheme that the material conveying assembly comprises:
the material conveying cylinder is at least partially arranged in the screen cylinder; a third spiral is formed on the inner wall of the material conveying cylinder; at least two sets of material leaking openings are formed in the circumferential surface of the material conveying cylinder body along the axis direction.
According to the invention, a plurality of first blanking points are formed in the screen cylinder corresponding to the material conveying cylinder along the axial direction of the cylinder, a second blanking point is formed at the position of the cylinder far away from the material conveying cylinder, and materials are gradually distributed on the screen, so that the whole screen is used for screening and cannot be concentrated at one position, thus the utilization rate of the screen is improved, and the screening efficiency of the screening device is greatly improved.
The third screw at the part extending into the screen cylinder is arranged on the inner wall of the shell of the material conveying cylinder, and the material leakage port on the shell of the material conveying cylinder is arranged along the circumferential direction of the material conveying cylinder in a staggered manner, so that the function of feeding and discharging materials at the same time is realized, the screening efficiency is improved, and the equipment is greatly reduced.
The material-discharging device is provided with the material-discharging opening on the material-conveying cylinder body, so that the materials are discharged while being fed, and all discharged materials fall into the sieve cylinder for sieving.
In order to further solve the technical problem that the screen is damaged due to the fact that the blanking position is single, any two groups of adjacent material leaking openings are arranged in a staggered mode along the circumferential direction, so that the blanking points of the screen cylinders corresponding to the material conveying assemblies are staggered, and the uniformity of materials of the blanking points of the screen cylinders corresponding to the material conveying assemblies is further improved.
In order to solve the technical problem that the screen mesh is easy to damage due to the fact that a blanking point is close to the front end of a screen drum mechanism, the technical scheme is that 2/3 with the length being equal to the length of the screen drum is extended into the screen drum by the end portion of a material conveying drum, the material conveying assembly is used for conveying the material to the rear end of the screen drum mechanism, the blanking point is moved backwards to the rear end of the screen drum mechanism, and the damage to the front end of the screen drum mechanism due to the fact that the material is too concentrated is avoided.
In order to solve the technical problem of how to assemble the material conveying assembly and the driving mechanism, the invention adopts the following technical scheme that the material conveying assembly further comprises:
one end of the transmission main shaft penetrates through the screening shell and is connected with the output end of the driving mechanism, the transmission main shaft is connected with the material conveying cylinder body, and the transmission main shaft is rotatably connected with the screening cylinder body.
In order to solve the technical problem of low material conveying speed, the invention adopts the following technical scheme that a first screw for transferring materials into a material conveying cylinder is further formed on a transmission main shaft, so that the material conveying speed and the screening efficiency are improved.
In order to further solve the technical problem of low material conveying speed, the invention adopts the following technical scheme that the number of the first screws is 3, the 3 first screws are uniformly wound around the circumferential direction of the main shaft, and the first screws extend into the material conveying cylinder body.
According to the invention, the first screw is designed into a 3-head screw, 3 helical blades are arranged in the circumferential direction and fixed with the main shaft, so that the contact area of the first screw and a material can be increased, the conveying speed of the material is increased, and the screening efficiency is improved.
In order to solve the technical problem of how to feed and discharge the screening shell, the invention adopts the following technical scheme that the screening shell comprises:
the screening part is internally provided with a screening cavity, and the screen drum is arranged in the screening cavity; a fine material outlet is formed at the bottom of the screening part below the screening cylinder, and a coarse material outlet is formed at one end of the bottom of the screening part far away from the material conveying cylinder;
the feeding part is fixed at the end part, close to the material conveying cylinder, of the screening part, a feeding cavity communicated with the screening cavity is formed inside the feeding part, and a feeding port is formed by upwards extending the feeding cavity.
All materials discharged from the material conveying component of the invention fall into the screen cylinder for screening, the materials with the geometric dimension larger than the screen holes are conveyed to a coarse material outlet (a large impurity opening) through the second screw to be collected, the materials with the geometric dimension smaller than the screen holes pass through the screen holes to enter a fine material outlet (a finished product discharge opening), and the materials enter the next procedure.
In order to solve the technical problem of material residue in the feeding part, the invention adopts the following technical scheme that the first screw is positioned in the feeding cavity so as to timely transfer the material in the feeding cavity to the material conveying assembly and avoid the material residue in the feeding part.
In order to solve the technical problem that the screen drum is inconvenient to disassemble and assemble, the invention adopts the following technical scheme that the screen drum comprises a net rack fixed on the main shaft and a screen assembly fixed on the net rack; the net rack and the screen assembly are connected in an assembling way, so that the maintenance and the replacement are convenient;
the net rack is fixedly connected with the second spiral, the spiral axis of the second spiral is superposed with the axis of the main shaft, and the two spirals are arranged coaxially.
In order to solve the technical problems that the integral type screen drum is inconvenient to disassemble and assemble and the empty drum is damaged due to the softness of the screen mesh, the invention adopts the following technical scheme that the screen drum is arranged in sections;
the number of the net racks is at least two, the adjacent net racks are arranged side by side, and the adjacent net racks are connected in an assembling manner;
the number of the screen assemblies is equal to that of the net racks, and the screen assemblies are connected with the net racks in an assembling manner;
the screen assembly is of a cylindrical structure and comprises a plurality of screen subassemblies;
the screen cloth subassembly is arc overall structure, including screen cloth, the screen cloth skeleton that the screen cloth set up all around, the screen cloth adopts stainless steel to weave the structure.
The screen is externally attached with the frame, so that the strength is increased, the adjacent net racks are in assembly connection, and the screen assembly is in assembly connection with the net racks, so that the maintenance and the replacement are convenient.
The framework is designed on the periphery of the screen, and the framework and the screen are connected into a whole, so that hollowing damage caused by softness of the screen is avoided.
In order to solve the technical problem of dust diffusion in the screening process, the invention adopts the following technical scheme that the top of the screening part is provided with a dust removal port, the dust removal port is connected with a fan through an air pipe to form negative pressure to absorb and remove dust in a screening cavity, so that the dust diffusion in the screening process is reduced, and the working environment is purified.
In order to solve the technical problem that the rotating mechanism is not coaxial, so that the screening equipment is damaged, the invention adopts the following technical scheme that the main shaft, the material conveying cylinder body, the screening cylinder and the screening shell are coaxially arranged, so that the service life of a rotating assembly of the screening equipment is prolonged.
In order to solve the technical problem that the load cannot be started under extreme conditions, the invention adopts the following technical scheme that the driving mechanism comprises a driving motor and a speed reducer which are connected, and the output end of the speed reducer is connected with the corresponding end of the main shaft through a coupler;
the motor adopts a variable frequency motor;
the coupler adopts a tire coupler, and can be easily coped with when the load is started under extreme conditions.
The second purpose of the invention is to provide a screening method, which solves the technical problems of low efficiency and easy damage of the screen in the existing screening method.
In order to solve the technical problems, the invention adopts the following technical scheme and a screening method, which is realized by using any one of the screening devices, and comprises the following steps:
the driving mechanism drives the material conveying assembly and the screen drum to rotate together;
the material at the feeding end of the screening shell is transferred into the screen cylinder under the action of the material conveying component, and at least two blanking positions are formed in the screen cylinder, wherein the blanking positions at least comprise a screen cylinder blanking position close to the material conveying component and a screen cylinder blanking position far away from the material conveying component;
the material in the screen drum is directionally transferred to the end part of the screen drum far away from the material conveying assembly under the action of the screen drum; meanwhile, the materials in the screen drum are screened by the screen drum to obtain coarse materials and fine materials respectively.
According to the invention, only one part of the material transferred from the feeding end falls to the end part of the screen close to one side of the feeding part, and the other part is forcibly conveyed by the material conveying cylinder and gradually distributed on the screen, so that the whole screen is used for screening and is not concentrated at one position, the utilization rate of the screen is improved, and the screening efficiency of the screening device is greatly improved.
In order to further solve the technical problems, the invention adopts the following technical scheme that the screening method comprises the following steps: the driving mechanism drives the conveying cylinder body and the screen cylinder to rotate together through the transmission main shaft;
feeding materials from a feeding port, wherein the materials continuously enter a feeding cavity of a feeding part, and a first screw rotates along with a transmission main shaft and transfers the materials to a conveying cylinder;
the third screw rotates along with the conveying cylinder and moves the material to one end far away from the feeding part; part of the materials are leaked to one side of the screen drum close to the feeding part from the material leakage port; part of the materials are continuously transferred to the end part of the material conveying cylinder far away from the feeding part and fall onto the screen cylinder far away from one side of the feeding part;
the screen drum rotates along with the transmission main shaft, so that the second screw drives the materials to move, and the materials on the screen are turned and thrown for screening; and the screened fine materials are discharged from a fine material outlet, and the coarse materials are discharged from a coarse material outlet.
Under the action of the first, second and third screws, the feeding cylinder feeds materials and discharges materials at the same time, all discharged materials fall into the screen cylinder for screening, and the materials with the geometric size larger than the screen holes are conveyed to the second discharging component through the second screw, namely, large impurity openings are collected; the geometric dimension is smaller than the sieve mesh, the product passes through the sieve mesh point and enters the fine discharge hole, namely the product discharge hole, and the next procedure is carried out, so that the screening efficiency is greatly improved.
Drawings
FIG. 1 is a top plan view of the screening apparatus of the present invention;
FIG. 2 is a side view of the screening apparatus of the present invention;
FIG. 3 is a cross-sectional view of the screening apparatus of the present invention;
FIG. 4 is a perspective view of the screening mechanism of the screening apparatus of the present invention;
FIG. 5 is a cross-sectional view of the screening mechanism of the screening apparatus of the present invention;
FIG. 6 is a perspective view of a feed delivery cartridge of the screening apparatus of the present invention;
FIG. 7 is a cross-sectional view of a feed cylinder of the screening apparatus of the present invention;
FIG. 8 is a side view of the screening mechanism of the screening apparatus of the present invention;
figure 9 is a schematic view of the construction of the screen cylinder of the screening apparatus of the present invention;
figure 10 is a schematic illustration of the screen assembly of the screening apparatus of the present invention;
in the figure: 1, a frame;
2, screening the shell, 20 screening parts, 21 feeding parts, 22 fine material outlets, 23 coarse material outlets, 24 dust removal ports, 25 screening cavities, 26 feeding cavities and 27 feeding ports;
3, a screening mechanism, 30 main shafts, 300 support bearings, 301 bearing seats, 31 screen cylinders, 310 net racks, 311 screen assemblies, 3110 screen meshes, 3111 frameworks, 32 conveying assemblies, 320 supports, 321 conveying cylinders, 3210 material leakage ports and 322 screw supports;
4, a driving mechanism, 40 driving motors, 41 speed reducers and 42 couplers;
51 first spiral, 52 second spiral, 53 first spiral.
Detailed Description
Example 1
As shown in fig. 1-10, a high-efficiency cylinder screening device applied to powder screening comprises a frame 1, a screening shell 2, a screening mechanism 3 and a driving mechanism 4.
Screening housing 2 is located on frame 1, and screening housing 2 includes screening portion 20, feed portion 21.
The sieving part is 20 cylindrical structures, and a sieving cavity 25 is formed in the hollow part of the sieving part. The bottom of the sifting portion 20 is formed with a fine outlet 22 (i.e., a first discharge assembly) and a coarse outlet 23 (i.e., a second discharge assembly) downwardly. The feed section 21 is fixed to the end of the sizing section remote from the coarse material outlet. The interior of the feeding portion 21 is hollow forming a feeding chamber 26 which communicates with the screening chamber. A dispensing opening 27 extends upwardly from the dispensing chamber 21.
The screening mechanism 3 comprises a main shaft 30, a screening drum 31 and a material conveying assembly 32.
Both ends of the main shaft 30 penetrate the sieving part 20 and the feeding part 21 of the sieving housing 2 in the axial direction of the sieving housing 2 and are rotatably connected to the sieving housing 2. One end of the main shaft 30 is connected with the driving mechanism 4 to obtain power for axial rotation. Meanwhile, support bearings 300 are installed at positions of the main shaft 30 near both ends, and the support bearings 300 are supported by bearing blocks 301 installed on the frame. The main shaft 30 is further formed with a first screw 51 for transferring the material into the feeding unit 32.
The screen cylinder 31 is coaxially arranged in the screening chamber 25 of the screening housing 2. The screen cylinder 31 includes a rack 310 fixed to the main shaft and a screen assembly 311 fixed to the rack 310. The inside of the rack 310 is provided with a second screw 52, the screw axis of the second screw 52 being collinear with the axis of the main shaft 30. Screen cloth subassembly 311 is connected with sieve section of thick bamboo 31 assembled, and the convenient maintenance is changed.
When the main shaft 30 rotates, the first screw 51 rotates to transfer the material into the feeding assembly 32. Meanwhile, the spindle 51 drives the material conveying cylinder 321 to rotate through the bracket 320, and the second screw 52 drives the material to move along the material conveying cylinder 321. At this time, part of the material is leaked from the material leakage port 320 to the screen of the screen drum for screening. A portion of the material is further transferred to the end far from the feeding portion 21, and then dropped from the end of the feeding assembly 32 onto the screen assembly 311 for screening.
The drive mechanism 4 includes a drive motor 40 and a speed reducer 41. Specifically, the output end of the driving motor 40 is connected to the input end of the speed reducer 41. The speed reducer 41 is fixed to the frame 1. The output end of the speed reducer 40 is connected to one end of the main shaft 30 through a coupling 43. The driving motor 40 is a variable frequency motor, and the coupling 42 is a tire coupling, so that the driving motor can be easily used in extreme load starting.
The invention adopts a forced feeding mode, and the feeding section adopts a 2-head spiral conveying auger structure (a first spiral and a second spiral), so that the conveying capacity is increased.
The invention improves the screening efficiency by improving the overall utilization rate of the screen, can reduce the risks of damage, blockage and deformation of the screen and has smaller floor area. The invention has compact arrangement and small occupied area, and solves the problem of large occupied area of the existing equipment.
The working principle of the screening device is as follows: the driving motor is started, so that the main shaft rotates; and feeding from a feeding port, wherein the materials continuously enter a feeding cavity of the feeding part. The first screw rotates along with the main shaft and transfers the materials into the conveying cylinder; the material conveying assembly conveys materials into the screen drum and forms at least two blanking positions in the screen drum; part of the materials are positioned on the screen close to one side of the feeding part; part of the materials are transferred to the end part of the material conveying cylinder far away from the feeding part and fall onto a screen on one side far away from the feeding part; the screen drum rotates along with the main shaft, so that the second bolt drives the materials to move, and the materials on the screen are thrown and screened; and the screened fine materials are discharged from a fine material outlet, and the coarse materials are discharged from a coarse material outlet.
Materials are fed from the feeding section through the first spiral feed, a material conveying assembly is arranged in the screen drum, the materials are conveyed to the screen mesh of the screen drum far away from one side of the feeding part in a forced mode, the screening area is increased, and the materials are prevented from being extruded at the front end of the screen drum; simultaneously, utilize defeated material subassembly, guarantee the ejection of compact on one side of feeding, the material that comes out is whole to fall into sieve section of thick bamboo inside and sieves, and geometric dimension is greater than gathering to thick discharge gate (big miscellaneous mouthful) through the second auger delivery of sieve mesh, and geometric dimension is less than the sieve mesh, passes the sieve mesh point and goes into thin discharge gate (finished product discharge gate), gets into next process.
Example 2
As shown in fig. 4 to 8, the feeding module 32 includes a holder 320 and a feeding cylinder 321. The support 320 is fixedly connected with the main shaft 30, and the feed delivery cylinder 321 is fixedly connected with the support 320 and ensures that the feed delivery cylinder 321 and the main shaft 30 are coaxially arranged. The inner wall of the material delivery cylinder 321 is provided with a third screw 53, the third screw 53 is fixed on the net rack 310 through a screw support 322, and a gap is reserved between the third screw 53 and the main shaft 30. The third screw extending into the screen cylinder is not in contact with the main shaft, and the material conveying cylinder 321 is connected with the main shaft to form a fixed form of the material conveying cylinder and the main shaft, so that the integral strength is provided. The largest outer diameter of the feed delivery cylinder 321 is smaller than the inner diameter of the screen cylinder 31, and a gap is left between the outer periphery of the feed delivery cylinder 321 and the second screw 52. At least one group of material leakage openings are further formed in the circumferential wall of the material conveying cylinder 321 along the axial direction, and each group of material leakage openings at least comprises one material leakage opening 3210.
The third screw 53 extending into the screen cylinder 31 is provided with a material conveying cylinder 321, and blanking is alternately carried out at a staggered opening on the material conveying cylinder 321, so that the function of feeding and discharging materials at the same time is realized, the screening efficiency is improved, and the equipment is greatly reduced.
The invention adopts a forced feeding mode, and the feeding section adopts a 3-head spiral conveying auger structure (a first spiral, a second spiral and a third spiral), so that the conveying capacity is increased.
The inside of the screen drum adopts a forced feeding form, the feeding device is of a 3-head auger structure (a first screw, a second screw and a third screw), the fed materials extend into the screen drum, and the materials are synchronously discharged, so that the screening area is effectively increased, and the high-efficiency screening is realized. The invention is suitable for the screening equipment after the soybean meal is taken out of the warehouse and before the soybean meal is packed in the oil plant.
The working principle of the screening device is as follows: the driving motor is started, so that the main shaft rotates; and feeding from a feeding port, wherein the materials continuously enter a feeding cavity of the feeding part. The first screw rotates along with the main shaft and transfers the materials into the conveying cylinder; the third screw rotates along with the conveying cylinder and moves the material to one end far away from the feeding part; part of the materials are leaked to the screen mesh on one side of the screen cylinder close to the feeding part from the material leakage port; part of the materials are continuously transferred to the end part of the material conveying cylinder far away from the feeding part and fall onto the screen on one side far away from the feeding part; the screen drum rotates along with the main shaft, so that the second bolt drives the materials to move, and the materials on the screen are thrown and screened; and the screened fine materials are discharged from a fine material outlet, and the coarse materials are discharged from a coarse material outlet.
Example 3
When the quantity of every group drain hole is a plurality of, then every group drain hole along the circumference dislocation set of conveying cylinder, specifically do: at least two sets of material leakage ports 3210 are formed on the circumferential surface of the material delivery cylinder 321 along the axial direction. Preferably, in this embodiment, any two adjacent sets of material leaking openings are arranged along the circumferential direction of the material conveying cylinder 321 in a staggered manner.
Example 4
As shown in fig. 6, unlike embodiment 1, the portion of the main shaft 30 in the feeding part 21 is provided with at least one first screw 51 in the circumferential direction. When the main shaft 30 rotates, the material in the feeding part 21 can be driven to move to the screening part side by the first screw 51.
The number of the first spiral is 3, and the first spiral is uniformly wound around the circumference of the main shaft. Through this setting, can increase the contact area of first spiral and material to promote the conveying speed of material, avoid the material to remain in feed portion, promote screening efficiency. The feeding screw adopts a 3-head screw design (3 helical blades are arranged in the circumferential direction), the conveying contact area of the feeding screw and the material is increased, and the helical blades are fixed with the main shaft.
Example 5
As shown in fig. 3 and 5, one end of the feed cylinder is close to the feeding portion, and a small portion of the first screw extends into the feed cylinder. The other end of the material conveying cylinder extends to 2/3 in the screen cylinder, so that the third screw 53 of the material feeding section extends into 2/3 in the length direction of the inside of the screen cylinder 31, the material is fed and then extends to about 2/3 of the length of the screen cylinder, and the material is synchronously discharged. The largest outer diameter of the material conveying cylinder is smaller than the inner diameter of the screen cylinder, and a gap is reserved between the periphery of the material conveying cylinder and the second screw. When the main shaft rotates, the first screw rotates to transfer the material into the material conveying cylinder. Meanwhile, the main shaft drives the material conveying cylinder to rotate through the support, and the second screw drives the materials to move along the material conveying cylinder. At the moment, partial materials are leaked to the screen of the screen drum from the material leakage opening for screening. And a part of materials are continuously transferred to the end part of the material conveying cylinder far away from the feeding part and then fall onto the screen from 2/3 for screening.
Materials are fed from the feeding section through the first spiral feed, a forced conveying cylinder body is arranged in the screen cylinder, the materials are forcibly conveyed to the position 2/3 of the screen cylinder, the screening area is increased, and the materials are prevented from being extruded at the front end of the screen cylinder; stretch into third spiral auger in the sieve section of thick bamboo and main shaft contactless, attach spiral shell outward and be connected with the main shaft, form the fixed form of casing + main shaft, provide bulk strength, the head on the spiral shell, guarantee the ejection of compact on one side of feeding, the material that comes out all falls into sieve section of thick bamboo inside and sieves, the geometry is greater than gathering to thick discharge gate (big miscellaneous mouthful) through the guide auger delivery of sieve mesh, geometry is less than the sieve mesh, pass the sieve mesh point and go into thin discharge gate (finished product discharge gate), get into next process.
Example 6
As shown in fig. 9 and 10, the screen cylinder 31 is provided in a segmented manner. The sieve drum 31 adopts an assembled screen structure, and is convenient to overhaul. The number of the net racks is at least two, and the net racks are detachably arranged side by side. Correspondingly, the number of the screen assemblies is equal to that of the net racks, and the screen assemblies are correspondingly arranged.
The screen assembly 311 includes a screen 3110 and a frame 3111 integrally connected to the screen. The screen 3110 forms the cylinder structure, adopts the stainless steel to weave the screen, and screen 3110 peripheral design skeleton 3111 is connected as an organic whole with screen 3110, avoids the screen softness to cause the hollowing damaged. The screen is externally attached with a framework to increase the strength, and is convenient to assemble with the framework of the screen cylinder.
The length of the screen cylinder 31 in the axial direction is equivalent to the width of the fine material outlet 22 in the axial direction, so that the fine material screened by the screen cylinder 31 is completely discharged from the fine material outlet 22. The screened coarse material is discharged from one end of the screen cylinder 31 far away from the feeding part through a coarse material outlet 23.
Example 7
As shown in figure 3, the top of the screening part 20 is provided with a dust removal port 24, and the air pipe is connected with the fan to form negative pressure to absorb dust in the screening cavity, so that the dust diffusion in the screening process is reduced, and the working environment is purified.
Example 8
A method of screening comprising:
the driving mechanism drives the material conveying assembly and the screen drum to rotate together;
the material at the feeding end of the screening shell is transferred into the screen cylinder under the action of the material conveying component, and at least two blanking positions are formed in the screen cylinder, wherein the blanking positions at least comprise a screen cylinder blanking position close to the material conveying component and a screen cylinder blanking position far away from the material conveying component;
the material in the screen drum is directionally transferred to the end part of the screen drum far away from the material conveying assembly under the action of the screen drum; meanwhile, the materials in the screen drum are screened by the screen drum to obtain coarse materials and fine materials respectively.
In the screening process, the material that is transferred from feed portion only partly can drop to the screen cloth and be close to the tip of feed portion one side, but another part is carried by the conveying cylinder force to divide gradually on the screen cloth, and then make whole screen cloth all be used for sieving, and can not concentrate on one, thereby promote the utilization ratio of screen cloth, screening plant's screening efficiency promotes greatly. Simultaneously, can also avoid leading to the screen cloth to weigh too big damage and warp and block up the risk of warping because of the material is too concentrated. In addition, compared with the existing plane screen, the floor area is smaller, and the practicability is stronger.
Example 9
A method of screening comprising: the driving mechanism drives the conveying cylinder body and the screen cylinder to rotate together through the transmission main shaft;
feeding materials from a feeding port, wherein the materials continuously enter a feeding cavity of a feeding part, and a first screw rotates along with a transmission main shaft and transfers the materials to a conveying cylinder;
the third screw rotates along with the conveying cylinder and moves the material to one end far away from the feeding part; part of the materials are leaked to one side of the screen drum close to the feeding part from the material leakage port; part of the materials are continuously transferred to the end part of the material conveying cylinder far away from the feeding part and fall onto the screen cylinder far away from one side of the feeding part;
the screen drum rotates along with the transmission main shaft, so that the second screw drives the materials to move, and the materials on the screen are turned and thrown for screening; and the screened fine materials are discharged from a fine material outlet, and the coarse materials are discharged from a coarse material outlet.
Claims (10)
1. Screening equipment, characterized by includes:
a screening housing;
the screening mechanism comprises a screen cylinder arranged in a screening shell and a material conveying assembly used for conveying materials into the screen cylinder and forming at least two blanking positions in the screen cylinder;
and the output end of the driving mechanism is in transmission connection with the screen drum so as to drive the screen drum to directionally transfer the materials and screen the materials in the transfer process.
2. A screening apparatus according to claim 1, wherein the inner wall of the screen cylinder is formed with a second spiral.
3. A screening apparatus according to claim 1, wherein said delivery assembly includes:
the material conveying cylinder is at least partially arranged in the screen cylinder; a third spiral is formed on the inner wall of the material conveying cylinder; at least one group of material leaking openings are formed in the circumferential surface of the material conveying cylinder body along the axis direction.
4. A screening apparatus according to claim 1, wherein said delivery assembly includes:
the material conveying cylinder is at least partially arranged in the screen cylinder; a third spiral is formed on the inner wall of the material conveying cylinder; at least two sets of material leaking openings are formed in the circumferential surface of the material conveying cylinder body along the axis direction.
5. A screening apparatus according to claim 3 or claim 4 wherein said end of said feed cylinder projects into the screen cylinder by 2/3 the length of the screen cylinder.
6. A screening apparatus according to claim 3 or claim 4, wherein said delivery assembly further comprises:
one end of the transmission main shaft penetrates through the screening shell and is connected with the output end of the driving mechanism, the transmission main shaft is fixedly connected with the material conveying cylinder, and the transmission main shaft is rotatably connected with the screening cylinder.
7. A screening apparatus according to claim 6, wherein said drive shaft further defines a first screw for transferring material into said feed conveyor housing.
8. The screening apparatus of claim 7, wherein said screening housing comprises:
the screening part is internally provided with a screening cavity, and the screen drum is arranged in the screening cavity; a fine material outlet is formed at the bottom of the screening part below the screening cylinder, and a coarse material outlet is formed at one end of the bottom of the screening part far away from the material conveying cylinder;
the feeding part is fixed at the end part, close to the material conveying cylinder, of the screening part, a feeding cavity communicated with the screening cavity is formed inside the feeding part, and a feeding port is formed by upwards extending the feeding cavity.
9. The screening apparatus of claim 8, wherein said first screw is located in the feed chamber.
10. A screening method, implemented by the screening apparatus of any one of claims 1 to 9, comprising:
the driving mechanism drives the material conveying assembly and the screen drum to rotate together;
the material at the feeding end of the screening shell is transferred into the screen cylinder under the action of the material conveying component, and at least two blanking positions are formed in the screen cylinder, wherein the blanking positions at least comprise a screen cylinder blanking position close to the material conveying component and a screen cylinder blanking position far away from the material conveying component;
the material in the screen drum is directionally transferred to the end part of the screen drum far away from the material conveying assembly under the action of the screen drum; meanwhile, the materials in the screen drum are screened by the screen drum to obtain coarse materials and fine materials respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111638165.8A CN114289289A (en) | 2021-12-30 | 2021-12-30 | Screening device and screening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111638165.8A CN114289289A (en) | 2021-12-30 | 2021-12-30 | Screening device and screening method |
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| CN114289289A true CN114289289A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111638165.8A Pending CN114289289A (en) | 2021-12-30 | 2021-12-30 | Screening device and screening method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918125A (en) * | 2022-05-23 | 2022-08-19 | 徐州聚能道路安全设施有限公司 | Screening plant for road engineering |
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|---|---|---|---|---|
| US4645590A (en) * | 1984-12-11 | 1987-02-24 | Satake Engineering Co., Ltd. | Vertical type screening machine for granular material |
| US5433849A (en) * | 1993-09-15 | 1995-07-18 | Lyco Manufacturing, Inc. | Double drum waste water screen |
| CN203170566U (en) * | 2013-04-16 | 2013-09-04 | 武汉明博机电设备有限公司 | Spiral feeding type cylindrical preliminary cleaning screen |
| CN209697412U (en) * | 2019-01-27 | 2019-11-29 | 襄阳市飞钟粮食机械有限公司 | A kind of high efficiency cylindrical pre-cleaning screen |
| CN112934111A (en) * | 2021-04-14 | 2021-06-11 | 郑州固力特新材料有限公司 | Granulation screening plant for sintered flux |
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2021
- 2021-12-30 CN CN202111638165.8A patent/CN114289289A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4645590A (en) * | 1984-12-11 | 1987-02-24 | Satake Engineering Co., Ltd. | Vertical type screening machine for granular material |
| US5433849A (en) * | 1993-09-15 | 1995-07-18 | Lyco Manufacturing, Inc. | Double drum waste water screen |
| CN203170566U (en) * | 2013-04-16 | 2013-09-04 | 武汉明博机电设备有限公司 | Spiral feeding type cylindrical preliminary cleaning screen |
| CN209697412U (en) * | 2019-01-27 | 2019-11-29 | 襄阳市飞钟粮食机械有限公司 | A kind of high efficiency cylindrical pre-cleaning screen |
| CN112934111A (en) * | 2021-04-14 | 2021-06-11 | 郑州固力特新材料有限公司 | Granulation screening plant for sintered flux |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114918125A (en) * | 2022-05-23 | 2022-08-19 | 徐州聚能道路安全设施有限公司 | Screening plant for road engineering |
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