CN117563938B - Multistage screening plant of concrete raw materials - Google Patents
Multistage screening plant of concrete raw materials Download PDFInfo
- Publication number
- CN117563938B CN117563938B CN202410051137.3A CN202410051137A CN117563938B CN 117563938 B CN117563938 B CN 117563938B CN 202410051137 A CN202410051137 A CN 202410051137A CN 117563938 B CN117563938 B CN 117563938B
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- 238000012216 screening Methods 0.000 title claims abstract description 68
- 239000002994 raw material Substances 0.000 title claims abstract description 30
- 239000004567 concrete Substances 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 137
- 230000004888 barrier function Effects 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
Abstract
The invention relates to the technical field of engineering, in particular to a concrete raw material multistage screening device which comprises a frame, a first-stage screen cylinder and a second-stage screen cylinder; the first-stage screen cylinder and the second-stage screen cylinder are coaxially and synchronously rotatably arranged on the frame around the axis of the first-stage screen cylinder and the second-stage screen cylinder; the axes of the primary screen cylinder and the secondary screen cylinder are obliquely arranged on the horizontal plane, and the primary screen cylinder is higher than the secondary screen cylinder; under the initial condition, the mesh size of the sleeving part of the second-stage screen cylinder and the first-stage screen cylinder is consistent with that of the first-stage screen cylinder, the second-stage screen cylinder is used for screening the first-stage materials, and the mesh size of the sleeving part of the second-stage screen cylinder and the first-stage screen cylinder is larger than that of the first-stage screen cylinder, so that the second-stage materials can be screened. A first spiral barrier strip fixedly connected with the second-stage screen cylinder is arranged in the first-stage screen cylinder; when the acting force of the first spiral barrier strip on the first-stage material intercepted by the first spiral barrier strip is larger than a preset value, the second-stage screen cylinder is enabled to move to expose the part sleeved with the first-stage screen cylinder, the effective screening area for screening the first-stage material is increased, and the screening out of the first-stage material is accelerated.
Description
Technical Field
The invention relates to the technical field of engineering, in particular to a concrete raw material multistage screening device.
Background
The concrete is an engineering composite material obtained by mixing cement serving as a cementing material, sand and stone serving as aggregates and water according to a certain proportion and stirring, wherein the quality of sand and stone has very important influence on the quality and service life of the engineering, and the sand and stone are screened by a screening device according to the granularity of the sand and stone after being mined so as to meet different use requirements. For example, the patent of CN116651731B discloses a device for processing and screening ready-mixed concrete raw materials for urban construction, which is provided with a cylindrical screening plate structure, so that part of sand and stone rotate along with the screening plate, and the contact area between sand and stone and the screening plate is increased, thereby improving screening efficiency. In the prior art, for screening out the grit of multiple different particle diameters, adopt a plurality of sieve barrels of different sieve mesh size to the raw materials screening in proper order generally to improve screening efficiency, but when there is great change in the different particle diameter proportion of raw materials at different moments in time when the feeding, lead to partial grade's material screening insufficient easily, influence screening effect.
Disclosure of Invention
The invention provides a multistage screening device for concrete raw materials, which aims to solve the problem that insufficient screening is easily caused when the proportion of different particle sizes of raw materials is greatly changed in the prior art.
The invention relates to a concrete raw material multistage screening device which adopts the following technical scheme:
a multi-stage screening device for concrete raw materials comprises a frame, a first-stage screen cylinder and a second-stage screen cylinder; the first-stage screen cylinder and the second-stage screen cylinder are coaxially and synchronously rotatably arranged on the frame around the axis of the first-stage screen cylinder and the second-stage screen cylinder; the sieve holes of the first-stage sieve cylinder are smaller than those of the second-stage sieve cylinder, the axes of the first-stage sieve cylinder and the second-stage sieve cylinder are obliquely arranged on the horizontal plane, the first-stage sieve cylinder is higher than the second-stage sieve cylinder, and materials enter from one end of the first-stage sieve cylinder, which is far away from the second-stage sieve cylinder, and pass through the first-stage sieve cylinder and the second-stage sieve cylinder in sequence under the action of gravity; the lower end of the first-stage screen cylinder is sleeved in the higher end of the second-stage screen cylinder, and the second-stage screen cylinder can axially slide relative to the first-stage screen cylinder and is connected with the first-stage screen cylinder through an elastic piece; in the initial state, the mesh size of the sleeved part of the secondary screen cylinder and the primary screen cylinder is consistent with that of the primary screen cylinder, so that the primary screen cylinder is used for screening primary materials, and the mesh size of the non-sleeved part of the secondary screen cylinder and the primary screen cylinder is larger than that of the primary screen cylinder, so that the secondary screen cylinder is used for screening secondary materials; a first spiral barrier strip is arranged in the first-stage screen cylinder and is fixedly connected with the second-stage screen cylinder; the first spiral barrier strip is attached to the inner wall of the first-stage screen cylinder, the height of the first-stage screen cylinder in the radial direction is consistent with the screen hole size of the first-stage screen cylinder, and the first-stage spiral barrier strip is used for pushing the second-stage screen cylinder to move in the direction away from the first-stage screen cylinder when the acting force of the intercepted first-stage material is greater than a preset value so as to improve the screening area of screening the first-stage material; and the first spiral barrier strip enables the material to have a tendency to move towards the higher end of the primary screen cylinder.
Further, a second spiral barrier strip is arranged in the secondary screen cylinder, and the second spiral barrier strip is attached to and fixedly connected with the inner wall of the secondary screen cylinder; the second spiral barrier strip and the first spiral barrier strip are in the same rotation direction, and the height of the second spiral barrier strip in the radial direction of the second-stage screen cylinder is consistent with the screen hole size of the first-stage screen cylinder.
Further, the concrete raw material multistage screening device further comprises a third-stage screen drum, wherein the third-stage screen drum is arranged at the lower side of the second-stage screen drum, and is coaxial with and sleeved with the second-stage screen drum; the mesh of the third-stage screen cylinder is larger than that of the part of the second-stage screen cylinder which is not sleeved with the first-stage screen cylinder; the tertiary screen cylinder rotates around self axis and installs in the frame, and tertiary screen cylinder and secondary screen cylinder synchronous rotation and can follow its axial slip with the secondary screen cylinder, and the sleeve joint part of secondary screen cylinder and tertiary screen cylinder increases when the secondary screen cylinder moves to the direction of keeping away from the primary screen cylinder.
Further, the inner wall of the three-stage screen cylinder is provided with a third spiral baffle strip, the spiral guide strip of the third spiral baffle strip is consistent with the spiral direction of the first spiral baffle strip, and the height of the third spiral baffle strip in the radial direction of the three-stage screen cylinder is consistent with the diameter of the screen holes of the three-stage screen cylinder.
Further, the area corresponding to the lower part of the first-stage screen drum is a first-stage material receiving area, the area corresponding to the lower part of the second-stage screen drum is a second-stage material receiving area, and the first-stage material receiving area and the second-stage material receiving area are separated by a partition plate fixed on the frame; the secondary screen cylinder is connected with a material blocking block, and the material blocking block rotates with the secondary screen cylinder and is synchronously connected with the secondary screen cylinder in an axially moving way; the baffle is hinged to one side of the baffle block, which is far away from the secondary screen cylinder, the baffle is positioned on one side of the baffle plate, which is close to the primary screen cylinder, and when the secondary screen cylinder moves towards the direction far away from the primary screen cylinder, the baffle guides the material discharged through the screen holes, which are consistent with the screen holes of the primary screen cylinder, on the secondary screen cylinder to flow to the primary material receiving area.
Further, a front guide plate and a rear guide plate are further arranged on the frame, and the front guide plate and the rear guide plate are respectively positioned on two sides of the peripheral surfaces of the primary screen cylinder and the secondary screen cylinder so as to guide materials discharged from the peripheral walls of the primary screen cylinder and the secondary screen cylinder to fall into a primary receiving area and a secondary receiving area.
Further, the first-stage material receiving area is provided with a first material conveying belt, the second-stage material receiving area is provided with a second material conveying belt, and the first material conveying belt and the second material conveying belt work independently and all convey materials along the axial direction perpendicular to the first-stage screen drum.
Further, the multistage screening device for concrete raw materials further comprises a driving mechanism, wherein the driving mechanism is used for driving the first-stage screen cylinder to rotate, and the first-stage screen cylinder, the second-stage screen cylinder and the third-stage screen cylinder sequentially pass through spline fit along the axial direction of the first-stage screen cylinder, so that the second-stage screen cylinder can synchronously rotate along with the first-stage screen cylinder and drive the third-stage screen cylinder to synchronously rotate.
Further, the driving mechanism comprises a motor, a first driving wheel and a second driving wheel, the motor is arranged on the frame, and the first driving wheel is arranged on an output shaft of the motor; the second driving wheel is fixed on the first-stage screen cylinder and is coaxial with the first-stage screen cylinder, and the second driving wheel is matched with the first driving wheel so that the first-stage screen cylinder rotates under the driving of the motor.
Further, the frame is also provided with a feeding barrel, and the feeding barrel guides materials to enter from one higher end of the primary screen cylinder.
The beneficial effects of the invention are as follows: the concrete raw material multistage screening device is characterized in that a first spiral barrier strip fixedly connected with a second-stage screen drum is arranged in the first-stage screen drum; the first spiral blend stop promotes the one-level material to higher one side removal, hinders the one-level material to be carried to in the second grade screen drum, prolongs the dwell time of one-level material in the one-level screen drum, promotes its sieve mesh discharge on through the one-level screen drum. And the first spiral blend stop can only intercept the material that the size is not greater than the primary material particle diameter, when its effort that receives the primary material of interception is greater than the default, the account for more of primary material in the material this moment, the removal through the second grade screen drum exposes its part that cup joints with the primary screen drum, increases the effective screening area of screening primary material for the screening of primary material.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic overall construction of an embodiment of a multi-stage screening apparatus for concrete raw materials according to the present invention;
FIG. 2 is a side view of the overall construction of an embodiment of a multi-stage screening apparatus for concrete raw materials according to the present invention;
FIG. 3 is a schematic view in section in the direction A-A of FIG. 2;
FIG. 4 is an enlarged schematic view of FIG. 3 at C;
FIG. 5 is an enlarged schematic view of FIG. 3 at B;
in the figure: 100. a frame; 110. a first material conveying belt; 120. a second material conveying belt; 130. a partition plate; 140. a material blocking block; 150. a baffle; 160. a front guide plate; 170. a rear guide plate; 180. a feed barrel; 190. a third material conveying belt; 200. a first-stage screen drum; 210. a first helical barrier; 300. a second-stage screen drum; 310. an elastic member; 320. a second spiral barrier; 400. a three-stage screen drum; 410. a third helical barrier; 500. a driving mechanism; 510. a motor; 520. a first driving wheel; 530. and a second driving wheel.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of a multi-stage screening apparatus for concrete raw materials of the present invention, as shown in fig. 1 to 5, includes a frame 100, a primary screen cylinder 200, and a secondary screen cylinder 300.
The primary screen cylinder 200 and the secondary screen cylinder 300 are coaxially and synchronously rotatably mounted on the frame 100 around their own axes; the axes of the primary screen drum 200 and the secondary screen drum 300 are inclined in the horizontal plane, the primary screen drum 200 is higher than the secondary screen drum 300, and materials enter from one end of the primary screen drum 200 away from the secondary screen drum 300 and pass through the primary screen drum 200 and the secondary screen drum 300 in sequence under the action of gravity.
The lower end of the primary screen cylinder 200 is sleeved in the higher end of the secondary screen cylinder 300, and the secondary screen cylinder 300 can axially slide relative to the primary screen cylinder 200 and is connected with the primary screen cylinder 200 through an elastic piece 310; specifically, the elastic member 310 is a spring, and extends along the axial direction of the secondary screen drum 300, and two ends of the elastic member 310 are respectively connected to the primary screen drum 200 and the secondary screen drum 300. In the initial state, the mesh size of the sleeved part of the secondary screen cylinder 300 and the primary screen cylinder 200 is consistent with that of the primary screen cylinder 200, so that the mesh size of the non-sleeved part of the secondary screen cylinder 300 and the primary screen cylinder 200 is larger than that of the primary screen cylinder 200, and the secondary screen cylinder 300 is used for screening the secondary material; when the primary screen drum 200 and the secondary screen drum 300 rotate, the screened material falls from the lower parts of the primary screen drum 200 and the secondary screen drum 300, and the particle size of the primary material is smaller than that of the secondary material.
A first spiral baffle strip 210 is arranged in the first-stage screen drum 200, and the first spiral baffle strip 210 is fixedly connected with the second-stage screen drum 300; the first spiral baffle strip 210 is attached to the inner wall of the first-stage screen drum 200, and the height in the radial direction of the first-stage screen drum 200 is consistent with the size of the screen holes of the first-stage screen drum 200, that is, the first spiral baffle strip 210 can only intercept materials with the size not larger than the particle size of the first-stage materials, and is used for pushing the second-stage screen drum 300 to move away from the first-stage screen drum 200 against the elastic force of the elastic piece 310 when the acting force of the intercepted first-stage materials is larger than a preset value, so that the effective screening area of the screened first-stage materials is increased, and the screening out of the first-stage materials is accelerated. And the first helical barrier 210 causes the material to have a tendency to move toward the upper end of the primary screen drum 200; specifically, the first spiral barrier 210 extends spirally around the axis of the primary screen drum 200, and there may be a plurality of first spiral barriers 210 spaced circumferentially around the primary screen drum 200, each first spiral barrier 210 being located at the rear side of the other end in the rotational direction of the primary screen drum 200 near the higher end of the primary screen drum 200.
When the first-stage screen drum 200 and the second-stage screen drum 300 synchronously rotate, the materials are driven to overturn in the screen drum and move to the lower side under the action of gravity, the first-stage materials and the second-stage materials are respectively discharged from the lower sides of the first-stage screen drum 200 and the second-stage screen drum 300, the first spiral barrier strip 210 drives the first-stage materials to move to the higher side, the first-stage materials are prevented from being carried into the second-stage screen drum 300, the retention time of the first-stage materials in the first-stage screen drum 200 is prolonged, and the first-stage materials are driven to be discharged through the sieve holes on the first-stage screen drum 200. In the initial state, the second-stage screen drum 300 is partially sleeved with the first-stage screen drum 200 under the action of the elastic piece 310, when the acting force of the first spiral barrier strip 210 on the intercepted material is greater than a preset value, the fact that the first-stage material in the material occupies more space at the moment is indicated, the portion of the first-stage material sleeved with the first-stage screen drum 200 is exposed through movement of the second-stage screen drum 300, the effective screening area of the first-stage material is increased, and screening out of the first-stage material is accelerated.
In this embodiment, a second spiral barrier 320 is disposed in the secondary screen drum 300, and the second spiral barrier 320 is attached to and fixedly connected with the inner wall of the secondary screen drum 300; the second spiral barrier 320 is rotated in the same direction as the first spiral barrier 210 and has a height in the radial direction of the secondary screen drum 300 in conformity with the screen size of the primary screen drum 200. The second spiral barrier 320 further intercepts the primary material, cooperates with the first spiral barrier 210 to adjust the displacement of the secondary screen drum 300 according to the amount of the intercepted primary material, and further promotes the primary material not discharged from the primary screen drum 200 to return to the primary screen drum 200 again when the second spiral barrier 320 rotates with the secondary screen drum 300. Preferably, a plurality of second spiral bars 320 are provided at a side of the secondary screen drum 300 adjacent to the primary screen drum 200.
In this embodiment, a concrete raw material multi-stage screening device further includes a three-stage screen drum 400, where the three-stage screen drum 400 is disposed at a lower side of the two-stage screen drum 300, and is coaxial with and sleeved with the two-stage screen drum 300; the mesh of the third-stage screen drum 400 is larger than that of the part of the second-stage screen drum 300 which is not sleeved with the first-stage screen drum 200, so that the third-stage screen drum is used for screening third-stage materials; the three-stage screen drum 400 is rotatably mounted on the frame 100 around the axis thereof, and the frame 100 restricts the three-stage screen drum 400 from moving along the axial direction thereof; the three-stage screen drum 400 and the two-stage screen drum 300 synchronously rotate and can axially slide along the two-stage screen drum 300, when the two-stage screen drum 300 moves in the direction away from the one-stage screen drum 200, the first-stage material occupies more of the materials entering in the period, the other materials occupy less of the materials, the materials needing screening of the two-stage screen drum 300 and the three-stage screen drum 400 are less, at the moment, the sleeving parts of the two-stage screen drum 300 and the three-stage screen drum 400 are increased, and the integral screening duration of the materials cannot be influenced.
In some other embodiments, there may be multiple tertiary screen cylinders 400, sequentially nested axially along the secondary screen cylinder 300, with sequentially increasing screen mesh diameters, to achieve more stages of material screening.
In this embodiment, a third spiral barrier strip 410 is disposed on the inner wall of the three-stage screen drum 400, and the spiral direction of the third spiral barrier strip 410 is identical to that of the first spiral barrier strip 210, so that the third spiral barrier strip 410 guides the material to move toward the higher end of the three-stage screen drum 400 when rotating with the three-stage screen drum 400. The height of the third spiral barrier strip 410 in the radial direction of the three-stage screen drum 400 is consistent with the diameter of the screen holes of the three-stage screen drum 400, so that the residence time of the three-stage material in the three-stage screen drum 400 is prolonged, and the screening out of the three-stage material is facilitated.
In this embodiment, the area corresponding to the lower portion of the first-stage screen drum 200 is a first-stage receiving area, the area corresponding to the lower portion of the second-stage screen drum 300 is a second-stage receiving area, and the first-stage receiving area and the second-stage receiving area are separated by a partition 130 fixed on the frame 100. The secondary screen drum 300 is connected with a baffle block 140, and the baffle block 140 and the secondary screen drum 300 rotate and are synchronously connected along the axial movement of the secondary screen drum 300; the baffle 150 is hinged to one side of the baffle block 140 away from the secondary screen drum 300, the baffle 150 is located on one side of the baffle 130 close to the primary screen drum 200, and when the secondary screen drum 300 moves in a direction away from the primary screen drum 200, the baffle 150 guides the material discharged through the screen holes of the secondary screen drum 300, which are consistent in size with the screen holes of the primary screen drum 200, to flow to the primary receiving area.
In some other embodiments, the corresponding area below the tertiary screen drum 400 is a tertiary accept area, which is separated from the secondary accept area by a clamp plate. The two baffle blocks 140 and the baffle plates 150 are respectively two, the two baffle blocks 140 are fixed with the second-stage screen drum 300, the two baffle plates 150 are respectively hinged with the two baffle blocks 140, one baffle plate 150 is positioned on one side of the baffle plate 130, which is close to the first-stage screen drum 200, the other baffle plate 150 is positioned on one side of the clamping plate, which is close to the second-stage screen drum 300, when the second-stage screen drum 300 moves in a direction away from the first-stage screen drum 200, the baffle plates 150 corresponding to the baffle plate 130 guide the materials discharged through the screen holes on the second-stage screen drum 300, which are consistent with the screen holes of the first-stage screen drum 200, to flow to the first-stage material receiving area, and the baffle plates 150 corresponding to the clamping plate guide the materials passing through the overlapping part of the second-stage screen drum 300 and the third-stage screen drum 400 to flow to the second-stage material receiving area.
In this embodiment, the frame 100 is further provided with a front guide plate 160 and a rear guide plate 170, and the front guide plate 160 and the rear guide plate 170 are respectively located at two sides of the peripheral surfaces of the primary screen drum 200 and the secondary screen drum 300, so as to guide the materials discharged from the peripheral walls of the primary screen drum 200, the secondary screen drum 300 and the tertiary screen drum 400 to fall into the primary material receiving area, the secondary material receiving area and the tertiary material receiving area.
In this embodiment, the first stage receiving area is provided with a first material conveying belt 110, the second stage receiving area is provided with a second material conveying belt 120, and the first material conveying belt 110 and the second material conveying belt 120 work independently and all convey materials along the axial direction perpendicular to the first stage screen drum 200.
In some other embodiments, the tertiary collection zone is provided with a third conveyor belt 190, with the first conveyor belt 110, the second conveyor belt 120, and the third conveyor belt 190 being disposed in parallel.
In this embodiment, a concrete raw material multi-stage screening device further includes a driving mechanism 500, where the driving mechanism 500 is used to drive the first-stage screen drum 200 to rotate, and spline matching is sequentially performed between the first-stage screen drum 200, the second-stage screen drum 300 and the third-stage screen drum 400 along the axial direction, so that the second-stage screen drum 300 can synchronously rotate with the first-stage screen drum 200 and drive the third-stage screen drum 400 to synchronously rotate.
In this embodiment, the driving mechanism 500 includes a motor 510, a first driving wheel 520 and a second driving wheel 530, the motor 510 is mounted on the frame 100, and the first driving wheel 520 is mounted on an output shaft of the motor 510; the second driving wheel 530 is fixed to the first stage screen drum 200 and is coaxial with the first stage screen drum 200, and the second driving wheel 530 is engaged with the first driving wheel 520 to rotate the first stage screen drum 200 under the driving of the motor 510. Wherein the first and second driving wheels 520 and 530 are friction wheels or gears.
In this embodiment, the frame 100 is further provided with a feeding barrel 180, and the feeding barrel 180 guides the material to enter from the higher end of the primary screen drum 200, and in order to ensure the screening effect, the feeding barrel 180 evenly feeds the material into the primary screen drum 200.
When the concrete raw material multi-stage screening device is used, the driving mechanism 500 drives the first-stage screen cylinder 200, the second-stage screen cylinder 300 and the third-stage screen cylinder 400 to synchronously rotate, the feeding barrel 180 continuously feeds materials into the first-stage screen cylinder 200, the second-stage screen cylinder 300 and the third-stage screen cylinder 400 flow in each screen cylinder from high to low when rotating, and the first-stage materials, the second-stage materials and the third-stage materials are screened out in sequence. The first spiral barrier strip 210 and the second spiral barrier strip 320 can only intercept the first-stage material, other materials can flow to a lower side beyond the first spiral barrier strip 210 and the second spiral barrier strip 320, and the first spiral barrier strip 210 and the second spiral barrier strip 320 can enable the second-stage screen cylinder 300 to have a trend of moving away from the first-stage screen cylinder 200 under the pushing of the materials when intercepting the first-stage material, when the pushing force of the materials received by the first spiral barrier strip 210 and the second spiral barrier strip 320 is larger than a preset value, the second-stage screen cylinder 300 overcomes the elasticity of the elastic piece 310 to move away from the first-stage screen cylinder 200, the part sleeved with the first-stage screen cylinder 200 is exposed, the effective screening area for screening the first-stage material is increased, and the screening out of the first-stage material is accelerated. Meanwhile, the overlapping part of the secondary screen cylinder 300 and the tertiary screen cylinder 400 is increased, so that the integral screening duration of the materials is not influenced. And when the secondary screen drum 300 moves, the material discharged through the screen holes with the same size as the screen holes of the primary screen drum 200 on the secondary screen drum 300 is guided to flow to the primary material receiving area by the cooperation of the baffle block 140 and the baffle 150, and the material discharged through the overlapping part of the secondary screen drum 300 and the tertiary screen drum 400 is guided to flow to the secondary material receiving area.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. A multistage screening plant of concrete raw materials, its characterized in that: comprises a frame, a first-stage screen cylinder and a second-stage screen cylinder;
the first-stage screen cylinder and the second-stage screen cylinder are coaxially and synchronously rotatably arranged on the frame around the axis of the first-stage screen cylinder and the second-stage screen cylinder; the axes of the primary screen cylinder and the secondary screen cylinder are obliquely arranged on the horizontal plane, the primary screen cylinder is higher than the secondary screen cylinder, and materials enter from one end of the primary screen cylinder far away from the secondary screen cylinder and sequentially pass through the primary screen cylinder and the secondary screen cylinder under the action of gravity;
the lower end of the first-stage screen cylinder is sleeved in the higher end of the second-stage screen cylinder, and the second-stage screen cylinder can axially slide relative to the first-stage screen cylinder and is connected with the first-stage screen cylinder through an elastic piece; in the initial state, the mesh size of the sleeved part of the secondary screen cylinder and the primary screen cylinder is consistent with that of the primary screen cylinder, so that the primary screen cylinder is used for screening primary materials, and the mesh size of the non-sleeved part of the secondary screen cylinder and the primary screen cylinder is larger than that of the primary screen cylinder, so that the secondary screen cylinder is used for screening secondary materials;
a first spiral barrier strip is arranged in the first-stage screen cylinder and is fixedly connected with the second-stage screen cylinder; the first spiral barrier strip is attached to the inner wall of the first-stage screen cylinder, the height of the first-stage screen cylinder in the radial direction is consistent with the screen hole size of the first-stage screen cylinder, and the first-stage spiral barrier strip is used for pushing the second-stage screen cylinder to move in the direction away from the first-stage screen cylinder when the acting force of the intercepted first-stage material is greater than a preset value so as to improve the screening area of screening the first-stage material; and the first spiral barrier strip enables the material to have a tendency to move towards the higher end of the primary screen cylinder.
2. A multi-stage screening apparatus for concrete raw materials according to claim 1, wherein: a second spiral barrier strip is arranged in the second-stage screen cylinder, and the second spiral barrier strip is attached to and fixedly connected with the inner wall of the second-stage screen cylinder; the second spiral barrier strip and the first spiral barrier strip are in the same rotation direction, and the height of the second spiral barrier strip in the radial direction of the second-stage screen cylinder is consistent with the screen hole size of the first-stage screen cylinder.
3. A multi-stage screening apparatus for concrete raw materials according to claim 1, wherein: the three-stage screen cylinder is arranged at the lower side of the two-stage screen cylinder, and is coaxial with and sleeved with the two-stage screen cylinder; the mesh of the third-stage screen cylinder is larger than that of the part of the second-stage screen cylinder which is not sleeved with the first-stage screen cylinder; the tertiary screen cylinder rotates around self axis and installs in the frame, and tertiary screen cylinder and secondary screen cylinder synchronous rotation and can follow its axial slip with the secondary screen cylinder, and the sleeve joint part of secondary screen cylinder and tertiary screen cylinder increases when the secondary screen cylinder moves to the direction of keeping away from the primary screen cylinder.
4. A multi-stage screening apparatus for concrete raw materials according to claim 3, wherein: the inner wall of the three-stage screen cylinder is provided with a third spiral baffle strip, the spiral guide strip of the third spiral baffle strip is consistent with the spiral direction of the first spiral baffle strip, and the height of the third spiral baffle strip in the radial direction of the three-stage screen cylinder is consistent with the diameter of the screen holes of the three-stage screen cylinder.
5. A multi-stage screening apparatus for concrete raw materials according to claim 1, wherein: the area corresponding to the lower part of the first-stage screen drum is a first-stage material receiving area, the area corresponding to the lower part of the second-stage screen drum is a second-stage material receiving area, and the first-stage material receiving area and the second-stage material receiving area are separated by a partition plate fixed on the frame; the secondary screen cylinder is connected with a material blocking block, and the material blocking block rotates with the secondary screen cylinder and is synchronously connected with the secondary screen cylinder in an axially moving way; the baffle is hinged to one side of the baffle block, which is far away from the secondary screen cylinder, the baffle is positioned on one side of the baffle plate, which is close to the primary screen cylinder, and when the secondary screen cylinder moves towards the direction far away from the primary screen cylinder, the baffle guides the material discharged through the screen holes, which are consistent with the screen holes of the primary screen cylinder, on the secondary screen cylinder to flow to the primary material receiving area.
6. A multi-stage screening apparatus for concrete raw materials as recited in claim 5, wherein: the frame is also provided with a front guide plate and a rear guide plate, and the front guide plate and the rear guide plate are respectively positioned at two sides of the peripheral surfaces of the primary screen cylinder and the secondary screen cylinder so as to guide the materials discharged from the peripheral walls of the primary screen cylinder and the secondary screen cylinder to fall into a primary receiving area and a secondary receiving area.
7. A multi-stage screening apparatus for concrete raw materials as recited in claim 5, wherein: the first-stage material receiving area is provided with a first material conveying belt, the second-stage material receiving area is provided with a second material conveying belt, and the first material conveying belt and the second material conveying belt work independently and all convey materials along the axial direction perpendicular to the first-stage screen drum.
8. A multi-stage screening apparatus for concrete raw materials according to claim 2, wherein: the novel three-stage screen drum comprises a first-stage screen drum body, a second-stage screen drum body, a third-stage screen drum body, a driving mechanism and a driving mechanism, wherein the driving mechanism is used for driving the first-stage screen drum body to rotate, and the first-stage screen drum body, the second-stage screen drum body and the third-stage screen drum body are sequentially matched through splines along the axial direction of the driving mechanism, so that the second-stage screen drum body can synchronously rotate along with the first-stage screen drum body and drive the third-stage screen drum body to synchronously rotate.
9. A multi-stage screening apparatus for concrete raw materials as recited in claim 8, wherein: the driving mechanism comprises a motor, a first driving wheel and a second driving wheel, the motor is arranged on the frame, and the first driving wheel is arranged on an output shaft of the motor; the second driving wheel is fixed on the first-stage screen cylinder and is coaxial with the first-stage screen cylinder, and the second driving wheel is matched with the first driving wheel so that the first-stage screen cylinder rotates under the driving of the motor.
10. A multi-stage screening apparatus for concrete raw materials according to claim 1, wherein: the frame is also provided with a feeding barrel which guides the material to enter from the higher end of the first-stage screen cylinder.
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| FR2637514A1 (en) * | 1988-10-12 | 1990-04-13 | Marot Ste Nle Emile | Cereal grain sorting machine of the type comprising a rotary screen |
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| CN210546216U (en) * | 2019-06-23 | 2020-05-19 | 灵寿县华源云母有限公司 | Multi-stage separation drum sieve for mica production |
| CN215390622U (en) * | 2021-07-13 | 2022-01-04 | 惠州市金广盛建设有限公司 | A grit multi-stage separation device for construction |
| CN216678973U (en) * | 2021-12-21 | 2022-06-07 | 福建圆通机械工贸有限责任公司 | Multi-stage drum screen capable of screening out oil bottles and impurities |
| JP2023049317A (en) * | 2021-09-29 | 2023-04-10 | 住友金属鉱山株式会社 | Trommel |
| CN116532352A (en) * | 2023-06-08 | 2023-08-04 | 瑞邦环境治理(广东)有限公司 | Sectional type drum screen mechanical structure |
-
2024
- 2024-01-15 CN CN202410051137.3A patent/CN117563938B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2637514A1 (en) * | 1988-10-12 | 1990-04-13 | Marot Ste Nle Emile | Cereal grain sorting machine of the type comprising a rotary screen |
| CN205762190U (en) * | 2016-06-21 | 2016-12-07 | 江苏嘉贤米业有限公司 | A kind of efficiently pre-cleaning sieve for unprocessed food grains |
| CN210546216U (en) * | 2019-06-23 | 2020-05-19 | 灵寿县华源云母有限公司 | Multi-stage separation drum sieve for mica production |
| CN215390622U (en) * | 2021-07-13 | 2022-01-04 | 惠州市金广盛建设有限公司 | A grit multi-stage separation device for construction |
| JP2023049317A (en) * | 2021-09-29 | 2023-04-10 | 住友金属鉱山株式会社 | Trommel |
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| CN116532352A (en) * | 2023-06-08 | 2023-08-04 | 瑞邦环境治理(广东)有限公司 | Sectional type drum screen mechanical structure |
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| CN117563938A (en) | 2024-02-20 |
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