CN106975609B - Sorting grating and powder concentrator adopting same for sorting - Google Patents
Sorting grating and powder concentrator adopting same for sorting Download PDFInfo
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- CN106975609B CN106975609B CN201710240276.0A CN201710240276A CN106975609B CN 106975609 B CN106975609 B CN 106975609B CN 201710240276 A CN201710240276 A CN 201710240276A CN 106975609 B CN106975609 B CN 106975609B
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- 239000000843 powder Substances 0.000 title claims abstract description 100
- 239000000463 material Substances 0.000 claims abstract description 186
- 238000007599 discharging Methods 0.000 claims abstract description 91
- 238000000926 separation method Methods 0.000 claims abstract description 82
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 239000002994 raw material Substances 0.000 claims description 49
- 238000004064 recycling Methods 0.000 claims description 17
- 238000012216 screening Methods 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 11
- 230000001133 acceleration Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
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- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
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- 238000005272 metallurgy Methods 0.000 description 2
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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
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/04—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against baffle separators
-
- 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
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- 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
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
-
- 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
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a sorting grid which comprises a sorting grid formed by a plurality of inverted frustum-shaped outer grid plates, a plurality of regular frustum-shaped inner grid plates and a plurality of grid plates, wherein the outer grid plates and the inner grid plates are coaxially sleeved along the central axis of the sorting grid, and the plurality of outer grid plates and the inner grid plates which are arranged in a one-to-one penetrating way are connected from top to bottom through the grid plates distributed along the radial direction to form an integral air duct through which air flows and a scattering sorting channel through which materials drop step by step. The invention also discloses a powder concentrator adopting the separation grating to carry out separation, which comprises a shell with a material separation cavity, a separation grating arranged in the material separation cavity, a feeding mechanism and a discharging mechanism. According to the invention, the sorting grating is utilized to make the materials fully scattered by multiple impacts in the process of naturally falling under the action of dead weight in a limited space, and the sorting machine carries out primary sorting on the materials in the progressive scattering process, so that the sorting efficiency and the sorting rate are effectively improved.
Description
Technical Field
The invention relates to the field of building materials, metallurgy and chemical industry powder, in particular to a powder concentrator adopting a separation grid for separation.
Background
In the processing process of building materials, metallurgy and chemical industry, large-sized materials are usually ground and then separated through a powder separator, fine powder meeting the material standard is processed into finished products, coarse materials which do not meet the material standard are ground and then separated again, but after the existing powder separator is used for scattering materials through a scattering disc, the materials enter a powder separation chamber for separation, coarse powder is not thoroughly separated, a large amount of fine powder and coarse powder are mixed together and enter a lower cone to return to a grinder for re-grinding, the fine powder and coarse powder are mixed and enter the grinder for grinding, the repeated work of the grinder is increased, steel ball loss in the grinder is increased, and as the grinder is high-energy-consumption equipment, the production cost is correspondingly increased, the powder separation efficiency of the powder separator is low (the clean separation rate is low, generally about 35%), the yield is low, and the system energy consumption is high.
Patent number: CN201420669107.0, bulletin number: CN204194296U, patent name: the patent literature of a new type high-efficient powder concentrator discloses a powder concentrator of multistage separation, and disclose a new type high-efficient powder concentrator, including main support, elementary powder concentration apparatus, main drive motor, main shaft, lower part inner cone, lower part select powder room, the main support runs through elementary powder concentration apparatus of fixed and lower part and selects powder room, the main drive motor is placed on main support, the main drive motor is connected with lower part select room through the main shaft, lower part inner cone is connected with elementary powder concentration apparatus, and lower part inner cone is placed in elementary powder concentration apparatus; the lower powder selecting chamber is connected with the lower inner cone; the design cost increase of the prior art is overcome, when powder is selected in the lower powder selecting chamber, the main transmission motor is adopted to drive the lower powder selecting chamber to select powder through the main shaft, so that the design cost of the whole machine is effectively reduced, and meanwhile, the high-efficiency powder selecting of the lower powder selecting chamber can be completed; not only improves the efficiency and the yield of the grinding equipment, but also reduces the steel consumption and the electricity consumption of the grinding equipment, thereby reducing the production cost, and the net effect of the materials after the two separation (selection) stages is up to more than 95 percent. The primary powder selecting device comprises a feed inlet, a guide blade, a powder selecting machine rotor, a middle powder selecting chamber, a spreading disc, a baffle plate and an upper powder selecting chamber; the material spreading disc and the material baffle are arranged in the upper powder selecting chamber and are positioned at the upper part of the upper powder selecting chamber, and the material spreading disc is positioned above the material baffle. In the technical scheme, the materials firstly fall on the material spreading disc and then collide with the material blocking plate to be distributed all around, however, the materials are easy to form caking phenomenon, and the blocky materials are difficult to fully scatter only by one collision, so that the blocky materials which are not fully scattered enter the sorting chamber to influence the sorting efficiency and the sorting rate.
Disclosure of Invention
The invention aims to provide a separation grid which utilizes an overlapping structure to enable materials to be repeatedly folded and impacted to be fully scattered; the invention further aims to provide a powder concentrator which adopts the separation grating to carry out separation, and the secondary separation is carried out on the basis of fully scattering materials, so that the separation efficiency and the separation rate are better improved.
The invention is realized by the following technical scheme: the utility model provides a select separately grid, select separately the grid including at least one be interior grid tray of big-end-up's just round platform, at least one be big-end-up's the outer grid tray of the round platform of falling, at least one connect interior grid tray and outer grid tray simultaneously, the interior grid tray that is located the inner circle and the outer grid tray that is located the outer lane set up along the central axis of selecting separately the grid coaxial and connect into a whole through the grid tray, form simultaneously between interior grid tray, the outer grid tray that is the thin wall spare that the air flue that the air feed body passed through and the sorting passageway that supplies the material to drop the scattering step by step.
The inner grid plate and the outer grid plate of the separation grid are connected through the grid plates to form a structure which is provided with an air duct for air to pass through quickly and a separation channel for materials to drop and scatter step by step. An annular channel is formed between the inner grid plate and the outer grid plate, and the air duct and the sorting channel are overlapped at the annular channel.
Working principle:
the gas is input into the separation grating from bottom to top and diffuses from the center of the separation grating to the periphery, and meanwhile, the raw materials enter the separation grating from top to bottom and diffuse from the annular channel between the inner grating plate and the outer grating plate. When the raw materials enter from the feeding end of the sorting channel above the sorting grating, the raw materials firstly fall onto the inner grating plate or the outer grating plate with the inclined profile surface and are scattered, then fall onto the outer grating plate or the inner grating plate which are correspondingly arranged and are continuously scattered, and the materials can be fully scattered in a limited space by reciprocating overlapping, so that preparation is made for subsequent sorting. When the materials fall down on the inner grid plate or the outer grid plate and are scattered, air quickly flows into the separation grid under the action of a gas power source such as an air pump and the like to form air, and the air diffuses from the middle part of the separation grid to the annular channel and screens the materials with different particle sizes in the annular channel according to different gravities. Further, the wind source is constantly in cross contact with materials in the scattering process, the particles with heavy weight continuously drop downwards to be scattered or directly recovered, and the particles with light weight are upwards taken away from the separation grid by wind direction to be recovered.
In order to better realize the invention, the number of the inner grid plates and the outer grid plates is more than two (two or more), and the inner grid plates and the outer grid plates are arranged in a stacked manner from top to bottom.
In the invention, one group of inner grid plates and one group of outer grid plates in the plurality of inner grid plates and the outer grid plates are arranged in a one-to-one staggered way, and a plurality of groups of inner grid plates and outer grid plates are installed into a whole in a telescopic way from top to bottom, so that the materials alternately and reciprocally collide on the inner grid plates and the outer grid plates in the falling process, the structural characteristics of the separation grid plates are fully utilized, and the full scattering of the materials is further ensured in a limited space.
In order to better realize the invention, the inner grid plates are a plurality of inner grid plates with the same structure and different maximum outline diameters, the outer grid plates are a plurality of outer grid plates with the same structure and different specifications, and the inner grid plates and the outer grid plates are arranged in a whole set from top to bottom in the order of the maximum outline diameters from small to large.
In the invention, the plurality of inner grid plates can be a series of same inner grid plates, the plurality of outer grid plates can be a series of same outer grid plates, and at the moment, the plurality of same inner grid plates and the plurality of same outer grid plates are connected into a whole through the grid plates to form a multi-layer straight tower structure with equal width up and down.
Similarly, the plurality of inner grid plates can be a series of inner grid plates with the same structure and different specifications, the plurality of outer grid plates can be a series of outer grid plates with the same structure and different specifications, and at the moment, the plurality of inner grid plates and the plurality of outer grid plates are connected into a whole from large to small according to the specifications through the grid plates to form a multi-layer inverted tower structure with large upper part and small lower part; or the inner grid plates and the outer grid plates are connected into a whole from small to large according to the specification and then form a multi-layer positive tower structure with large top and small bottom. Wherein a series of inner or outer grids of different specifications meet the same structure of length/width/height scaling.
According to the invention, a positive tower structure is optimized according to the data such as the movement track and the impact force analysis when the material falls, and at the moment, the impact force is maximum and the energy loss is smaller in the falling process of the material, so that the full scattering of the material is facilitated.
In order to better realize the invention, further, the number of the grid plates is a plurality (two or more), and the plurality of grid plates are uniformly distributed along the circumference of the central axis of the sorting grid.
One end of the grating plate, which is close to the inner ring of the center, is connected with the inner grating plate, and one end of the grating plate, which is far away from the center, is connected with the outer grating plate, so that the inner grating plate and the outer grating plate are connected into a whole, and an annular channel is formed between the inner grating plate and the outer grating plate for air supply or material passing. The grid plates, although causing some blockage of the complete annular channel, are substantially negligible due to the small size of the grid plate thickness relative to the grid plate diameter and the large gap of the multiple grid plates disposed in a dispersed manner.
The invention is realized by the following technical scheme: the powder selecting machine comprises a shell, a powder selecting mechanism, a feeding mechanism and a discharging mechanism, wherein the shell is welded with a fixed foundation at the outer part and provided with a material selecting cavity at the inner part; the shell is provided with an air inlet, an air outlet, a feeding hole and a discharging hole which are communicated with the inside and the outside of the shell, the air inlet is positioned below the air outlet, the feeding device is connected with the feeding hole and the feeding end of the powder selecting mechanism, meanwhile, the discharging device is connected with the discharging hole and the discharging end of the powder selecting mechanism, and the powder selecting mechanism comprises a sorting grid used for primary sorting and the feeding end of the sorting grid positioned at the top is connected with the feeding device.
According to the invention, raw materials enter the material sorting cavity from the feeding mechanism by virtue of self structural characteristics and by virtue of wind force; firstly, entering a separation grid, alternately impacting an inner grid plate and an outer grid plate to realize scattering in the process of falling by the dead weight of the material, and simultaneously introducing wind which diffuses from bottom to top and from the center to the periphery into a powder concentrator to perform primary separation on the material in the scattering process; then, the secondary powder brought in by wind direction after the primary separation enters a cage rotor for secondary separation.
Particles with larger particle size and heavier weight; the particles with smaller particle size have lighter weight. The wind speed is adjusted or set to enable lighter weight particles smaller than the primary sorting design threshold to eat with wind and continue to advance, and enable heavier weight particles larger than the primary sorting design threshold to continue to drop downwards for dispersion or recovery. The change of the adsorption force/centrifugal force of particles is changed by adjusting or setting the rotation speed of the cage rotor, and the secondary separation is carried out on materials with different particle sizes by continuously combining the wind entering the separator from bottom to top. The cage rotor is of an existing structure, can be installed and used by direct purchasing, and can be omitted from description of the structure, the working principle and the like.
In order to better realize the invention, the powder selecting mechanism further comprises a power device arranged outside the shell, a main shaft arranged at the output end of the power device and extending into the material sorting cavity, a cage rotor arranged on the main shaft and driven by the power device through the main shaft, and a cage rotor for secondary sorting, a feeding device and a sorting grid for primary sorting are coaxially arranged from top to bottom in sequence;
the feeding device is provided with a raw material feeding end for external materials to enter and a raw material discharging end communicated with the raw material feeding end through a transit passage;
the separation grating is provided with a primary feeding end communicated with the raw material discharging end, a coarse material discharging end for screening coarse materials after primary separation and a secondary discharging end for screening intermediate materials after primary separation; an air duct and a sorting channel are communicated among the coarse material discharging end, the secondary discharging end and the primary feeding end;
the cage rotor is provided with a secondary feeding end communicated with the secondary discharging end, a finished product discharging end for screening out finished product materials after secondary sorting and a medium coarse material discharging end for screening out medium coarse materials after secondary sorting.
In the invention, the power device comprises a speed reducer and a rack provided with the speed reducer. The output shaft of speed reducer and main shaft coaxial coupling, if: spline connection, block key connection, etc. The speed reducer is driven to the cage rotor through the main shaft.
In order to better realize the invention, the feeding device further comprises an inner plate and an outer plate which are both in an inverted cone shape, and a cylindrical raw material feeding pipe connected with the raw material feeding hole, wherein the inner plate, the outer plate and the raw material feeding pipe which are all thin-wall parts are connected into a whole, a transit passage is formed between the inner plate and the outer plate, and a plurality of secondary feeding passages which are separated by the raw material feeding pipe are formed between the outer plate and the inner wall of the shell; the upper end of raw materials inlet pipe is the raw materials feed end, and the lower extreme of transfer passageway is the raw materials discharge end, and the lower extreme of raw materials inlet pipe communicates with the raw materials discharge end through the transfer passageway, and secondary discharge end communicates with secondary feed end through secondary feed channel simultaneously.
In order to better realize the invention, the discharging port comprises a finished product discharging port positioned at the top of the shell, a middle coarse material discharging port positioned at the bottom of the shell and a coarse material discharging port positioned at the bottom of the shell; the discharging device comprises a finished product recycling device connected with the finished product discharging end and the finished product discharging port, a middle coarse material recycling channel connected with the middle coarse material discharging end and the middle coarse material discharging port, and a coarse material recycling channel connected with the coarse material discharging end and the coarse material discharging port.
In order to better realize the invention, the shell comprises an upper material receiving and discharging air cylinder, a multi-stage powder selecting cylinder and a lower material receiving and feeding air cylinder which are sequentially connected into a whole from top to bottom and all inner cavities jointly form a material sorting cavity. The air inlet is arranged on the lower material receiving air inlet cylinder, and the air outlet is arranged on the upper material receiving air outlet cylinder. The material sorting cavity is sequentially provided with an upper powder selecting area, a dynamic powder selecting area and a lower powder selecting area from top to bottom, the cage rotor is positioned in the upper powder selecting area, the feeding device is positioned in the dynamic powder selecting area, and the sorting grid simultaneously spans the dynamic powder selecting area and the lower powder selecting area.
In order to better realize the invention, the middle coarse material recovery channel vertically penetrates through the inner plate from the center, and meanwhile, the middle coarse material recovery channel is separated from the transit channel and the secondary feeding channel; the top of the medium coarse material recovery channel corresponds to the medium coarse material discharge end, and the maximum contour diameter of the inner plate is larger than that of the cage rotor.
In order to better implement the invention, further, the cage rotor comprises a rotor frame mounted on the main shaft and guide blades uniformly distributed along the circumference of the rotor frame.
Compared with the prior art, the invention has the following advantages:
(1) According to the invention, the outer grid plates and the inner grid plates of the separation grid are arranged in a one-to-one penetrating and overlapping manner to form a plurality of scattering separation channels, so that materials which continuously fall from a feeding end under the action of gravity can be repeatedly turned back and impacted on the outer grid plates and the inner grid plates without other power sources only through the structural characteristics of the separation grid plates, and the materials are sufficiently scattered by utilizing repeated acceleration impact, so that preparation is made for efficient separation, the separation grid is ingenious in design and compact in structure, and the materials are repeatedly impacted in a limited space, and the scattering effect is good;
(2) According to the invention, the separation grid is provided with the air channel which enters from below, the air flows along the air channel and goes forward from the plurality of scattering separation channels, the materials are subjected to primary separation while being scattered through the scattering separation channels, the materials with the weight smaller than the coarse material threshold value in the scattering process are separated and taken away, preparation is made for secondary separation, and the separation grid is ingenious in design and compact in structure, so that the materials are subjected to primary separation while being scattered;
(3) According to the powder concentrator adopting the separation grating, the separation grating is utilized to fully scatter and primarily separate materials, and then secondarily separate the materials after primary separation, so that the separation efficiency and the separation rate are effectively improved.
Drawings
Fig. 1 is a schematic perspective view of a sorting grid according to the present invention.
FIG. 2 is a schematic cross-sectional view of a sorting grid according to the present invention.
Fig. 3 is a schematic perspective view of the elevation angle of the sorting grid in the invention.
Fig. 4 is a schematic perspective view of a powder concentrator according to the present invention.
Fig. 5 is a front view of the powder concentrator of the present invention.
Fig. 6 is a left side view of the powder concentrator of the present invention.
Fig. 7 is a top view of the powder concentrator of the present invention.
Fig. 8 is a schematic cross-sectional view of a powder concentrator according to the present invention.
Fig. 9 is a schematic perspective view of a feeding device according to the present invention.
FIG. 10 is a schematic cross-sectional view of a feeding device according to the present invention.
Fig. 11 is a schematic perspective view of a cage rotor according to the present invention.
Fig. 12 is a schematic perspective view of a spindle according to the present invention.
Wherein: 1. a housing; 11. an air inlet; 12. an air outlet; 13. a feed inlet; 14. a finished product discharge port; 15. a middle coarse material discharge port; 16. a coarse material discharge port; 17. air supplementing port; 21. a sorting grid; 211. an inner grid plate; 212. an outer grid plate; 213. a grid plate; 22. a power device; 231. a motor mounting rack; 23. a cage rotor; 24-spindle; 3. a feed mechanism; 31. an inner plate; 32. an outer plate; 33. a raw material feed pipe; 34. a medium and coarse material recovery channel; 4. a transit passage; 001. and (5) fixing a foundation.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto. It is to be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the drawings to indicate or relate to positions or positions based on the drawings, and are merely for convenience in describing the invention and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the invention.
Example 1:
the sorting grid 21 of the present embodiment includes a sorting grid 21 composed of a plurality of inverted frustum-shaped outer grid plates 212, a plurality of regular frustum-shaped inner grid plates 211 and a plurality of grid plates 213, wherein the outer grid plates 212 and the inner grid plates 211 are coaxially sleeved along the central axis of the sorting grid 21, and the plurality of outer grid plates 212 and the inner grid plates 211 which are arranged in a one-to-one penetrating manner are connected into a whole from top to bottom through the grid plates 213 distributed along the radial direction to form an air duct through which air flows and a scattering sorting channel through which materials drop step by step.
As shown in fig. 1 and 3, the inner ring of the sorting grid 21 is an inner grid plate 211 which is arranged step by step along the axis, and the outer ring is an outer grid plate 212 which is arranged step by step along the axis, and the inner grid plate 211 and the outer grid plate 212 form a three-dimensional structure with a plurality of coaxial annular channels in the middle through partition plates. The inner grating 211 and the outer grating 212 corresponding to the lateral position are a set of grating parts, and an annular channel is formed between the set of grating parts, and a middle space for air supply to pass through is also formed between each stage of grating parts, regardless of the structure of the partition plates.
As shown in fig. 2, the air duct and the break-up sorting channel partially overlap. The wind enters from below the separation grid 21 and moves upward step by step, and at the same time, part of the wind moves from the middle space to the periphery into the annular channel, and is dispersed by the periphery of the separation grid 21. The material gets into from the top of sorting grid 21, drops on the first group bars portion (interior bars 211 or outer bars 212) of uppermost earlier, then drops step by step from the annular channel under the dead weight effect constantly, and the material can constantly strike each other or strike interior bars 211 surface or strike at outer bars 212 surface in the dropping process, reaches the effect of fully scattering the material through multistage bars structure's setting.
As shown in fig. 2, in the use process, the materials enter from the upper part of the separation grid 21 and simultaneously wind is introduced into the lower part, in this state, the wind moving upwards and the materials moving downwards meet, a part of particles with lighter weight can be carried away according to the wind force, and the particles with heavier weight continue to drop downwards. In the structure of the embodiment, in the annular channel corresponding to each stage of the grid part, wind can take away a part of particles with lighter weight, so that the particles with different particle sizes are separated according to the weight of the particles in each stage of the annular channel. In this embodiment, the materials in the sorting grid 21 drop step by step and are screened out by wind to remove the materials with smaller weight (less than the set weight value) and take away the materials to be further processed, and finally the materials with larger weight (greater than the set weight value) drop down to be further processed.
In the same batch, the larger size particles are typically heavier and the smaller size particles are typically lighter. In order to sort particles with larger particle size and smaller particle size according to a certain design requirement, wind power is adopted to perform air separation on materials, which is a known technical scheme, and the working principle is not repeated.
In this embodiment, through the unique structure of the separation grid 21, the materials are impacted for many times under the action of dead weight and are fully scattered, and meanwhile, the lighter weight particles are continuously taken away by wind, so that the effect of material separation is achieved.
Example 2:
as shown in fig. 1, 2 and 3, the sorting grid 21 comprises at least one inner grid plate 211 of a right circular truncated cone with a smaller upper part and a larger lower part, at least one outer grid plate 212 of an inverted circular truncated cone with a larger upper part and a smaller lower part, and at least one grid plate 213 for simultaneously connecting the inner grid plate 211 and the outer grid plate 212, wherein the inner grid plate 211 positioned at the inner ring and the outer grid plate 212 positioned at the outer ring are coaxially arranged along the central axis of the sorting grid 21 and are connected into a whole through the grid plate 213, and meanwhile, an air channel for air to pass through rapidly and a sorting channel for materials to drop down step by step are formed between the inner grid plate 211 and the outer grid plate 212 which are thin-wall parts.
The number of the inner grating plates 211 and the outer grating plates 212 is plural (two or more), and the inner grating plates 211 and the outer grating plates 212 are stacked from top to bottom.
As shown in fig. 1 and 2, the number of the inner grating plates 211 is 5, and the number of the outer grating plates 212 is 4, wherein the lowermost inner grating plate 211 has no corresponding outer grating plate 212. The number of the inner grids 211 and the outer grids 212 can be the same or different, and the sorting is not affected. However, the technical solution that the number of the inner grating plates 211 is the same as or different from that of the outer grating plates 212 by only 1 is generally preferable, and the space can be fully utilized to make the material strike more times and be fully dispersed.
The number of the grid plates 213 is plural (two or more), and the plurality of grid plates 213 are uniformly distributed along the circumferential direction of the central axis of the sorting grid 21. As shown in fig. 1 and 3, the number of the grid plates 213 is 4, 4 partition plates are uniformly distributed along the circumference of the sorting grid 21, and the included angle between two adjacent partition plates is 90 °.
The number of the grating plates 213 is small, for example, 1, and although the inner and outer grating plates 211 and 212 can be connected and supported, the structure is unstable; the number of the grid plates 213 is large, such as 10, and the structural stability of the grid plates can break the connectivity of the annular channel, so that the scattering of materials or the sorting of materials can be affected. Therefore, 3 to 4 grid plates 213 are preferably provided.
The inner grating 211 and the outer grating 212 are thin-walled members, and the surfaces of the inner grating and the outer grating can be vertical or inclined. As shown in fig. 3, since the inner grid 211 and the outer grid 212 are both tapered surfaces, wind and material gradually spread from the middle to the periphery more smoothly.
Example 3:
as shown in fig. 4 to 8, a powder concentrator using a separation grid 21 for separation comprises a shell 1 welded with a fixed foundation 001 at the outside and provided with a material separation cavity at the inside, and a powder concentrating mechanism, a feeding mechanism 3 and a discharging mechanism respectively arranged on the shell 1; the shell 1 is provided with an air inlet 11, an air outlet 12, a feed inlet 13 and a discharge outlet which are communicated with the inside and the outside of the shell 1, the air inlet 11 is positioned below the air outlet 12, the feed inlet 13 is connected with the feed end of the powder selecting mechanism by the feed device, the discharge outlet is connected with the discharge end of the powder selecting mechanism by the discharge device, and the powder selecting mechanism comprises a sorting grid 21 used for primary sorting and the feed end of the sorting grid 21 positioned at the top is connected with the feed device. As shown in fig. 5, an air supply port 17 for generating rotational wind force is also provided.
As shown in fig. 4, the powder selecting mechanism further comprises a power device 22 arranged outside the shell 1, a main shaft 24 arranged at the output end of the power device 22 and extending into the material sorting cavity, a cage rotor 23 arranged on the main shaft 24 and driven by the power device 22 through the main shaft 24, a cage rotor 23 for secondary sorting, a feeding device and a sorting grid 21 for primary sorting are coaxially arranged in sequence from top to bottom;
as shown in fig. 8, the feeding device is provided with a raw material feeding end for external materials to enter and a raw material discharging end communicated with the raw material feeding end through a transit passage 4;
the separation grid 21 is provided with a primary feeding end communicated with the raw material discharging end, a coarse material discharging end for screening coarse materials after primary separation and a secondary discharging end for screening intermediate materials after primary separation; an air duct and a sorting channel are communicated among the coarse material discharging end, the secondary discharging end and the primary feeding end;
the cage rotor 23 is provided with a secondary feeding end communicated with the secondary discharging end, a finished product discharging end for screening out finished product materials after secondary sorting and a medium coarse material discharging end for screening out medium coarse materials after secondary sorting.
As shown in fig. 9 and 10, the feeding device includes an inner plate 31 and an outer plate 32 which are both in an inverted cone shape, and a cylindrical raw material feeding pipe 33 connected to the raw material feeding port 13, wherein the inner plate 31, the outer plate 32 and the raw material feeding pipe 33 which are all thin-walled members are connected into a whole, a transit passage 4 is formed between the inner plate 31 and the outer plate 32, and a plurality of secondary feeding passages which are separated by the raw material feeding pipe 33 are formed between the outer plate 32 and the inner wall of the housing 1; the upper end of the raw material feeding pipe 33 is a raw material feeding end, the lower end of the transit passage 4 is a raw material discharging end, the lower end of the raw material feeding pipe 33 is communicated with the raw material discharging end through the transit passage 4, and the secondary discharging end is communicated with the secondary feeding end through the secondary feeding passage.
As shown in fig. 4 to 7, the discharge ports include a finished product discharge port 14 positioned at the top of the shell 1, a middle coarse material discharge port 15 positioned at the bottom of the shell 1, and a coarse material discharge port 16 positioned at the bottom of the shell 1; the discharging device comprises a finished product recycling device connected with the finished product discharging end and the finished product discharging opening 14, a middle coarse material recycling channel 34 connected with the middle coarse material discharging end and the middle coarse material discharging opening 15, and a coarse material recycling channel connected with the coarse material discharging end and the coarse material discharging opening 16.
The middle coarse fodder recycling channel 34 vertically penetrates through the inner plate 31 from the center, and meanwhile, the middle coarse fodder recycling channel 34 is separated from the transit channel 4 and the secondary feeding channel; the top of the medium-coarse material recovery channel 34 corresponds to the medium-coarse material discharge end, and the maximum contour diameter of the inner plate 31 is larger than that of the cage rotor 23.
As shown in fig. 11, the cage rotor 23 includes a rotor frame mounted on a main shaft 24 and guide blades uniformly distributed along the circumference of the rotor frame.
As shown in fig. 9, the materials enter the transfer passage 4 from the raw material feeding ends of the four raw material feeding pipes 33, and then drop from the raw material discharging ends to the sorting grid 21 for one-stage sorting, so that sorting of intermediate materials (materials other than coarse materials) and coarse materials is realized. Coarse material is discharged from the coarse material discharge port 16 through a coarse material recovery channel by the coarse material discharge port 16 for recovery and treatment.
On the other hand, the intermediate materials are brought into the secondary feeding end of the cage rotor 23 above from the secondary discharging ends around the separation grid 21 by wind, and secondary separation is carried out under the action of negative pressure generated by rotation of the cage rotor 23, so that separation of finished products and intermediate coarse materials is realized. The finished product is discharged from a finished product discharge end through a finished product recovery device from a discharge port; while medium coarse material is discharged from the medium coarse material outlet through the medium coarse material recovery passage 34 from the medium coarse material discharge port 15. The principle of sorting materials by the cage rotor 23 is the prior art, and the improvement point of the present application is not that, so the description is omitted.
To sum up, in this embodiment, the feeding device is used for feeding and uniformly mixing materials, the sorting grating 21 is used for first-stage sorting, the cage rotor 23 is used for second-stage sorting, and the limited space is utilized to fully scatter the materials and realize multi-stage sorting of the materials, so that the sorting rate is higher.
Example 4:
the powder concentrator comprises a shell 1, a powder concentrating mechanism, a feeding mechanism 3 and a discharging mechanism, wherein the shell is welded with a fixed foundation 001 at the outer part and is internally provided with a material concentrating cavity; the shell 1 is provided with an air inlet 11, an air outlet 12, a feed inlet 13 and a discharge port which are communicated with the inside and the outside of the shell 1, the air inlet 11 is positioned below the air outlet 12, the feed device is connected with the feed inlet 13 and the feed end of the powder selecting mechanism, and the discharge device is connected with the discharge port and the discharge end of the powder selecting mechanism; the powder selecting mechanism comprises a sorting grid 21 mainly composed of a plurality of inverted frustum-shaped outer grid plates 212, a plurality of regular frustum-shaped inner grid plates 211 and a plurality of grid plates 213, wherein the outer grid plates 212 and the inner grid plates 211 are coaxially sleeved along the central axis of the sorting grid 21, and the plurality of outer grid plates 212 and the inner grid plates 211 which are arranged in a one-to-one penetrating mode are connected into a whole from top to bottom through grid plates 213 distributed along the radial direction to form an air channel through which air flows and a scattering sorting channel through which materials drop step by step.
Further, the whole sorting grid 21 is tower-shaped, and a plurality of outer grid plates 212 and inner grid plates 211 with the same structure and different specifications are all arranged in a matching way from top to bottom according to the order of the largest outline diameter from small to large.
Further, the shell 1 comprises an upper material receiving and discharging air cylinder, a multi-stage powder selecting cylinder and a lower material receiving and charging air cylinder which are sequentially connected into a whole from top to bottom, wherein each inner cavity forms a sorting cavity together, an air inlet 11 is arranged on the lower material receiving and charging air cylinder, and an air outlet 12 is arranged on the upper material receiving and discharging air cylinder; the separation cavity is sequentially provided with an upper powder selection area, a dynamic powder selection area and a lower powder selection area from top to bottom, and the separation grid 21 is positioned in the dynamic powder selection area and the lower powder selection area.
Further, the powder selecting mechanism further comprises a power device 22 arranged outside the shell 1, a main shaft 24 extending into the material sorting cavity, a cage rotor 23 arranged in the material sorting cavity and arranged on the main shaft 24, a cage rotor 23 used for secondary sorting, a feeding device arranged between the cage rotor 23 and the sorting grating 21, and the sorting grating 21 used for primary sorting, which are coaxially arranged in sequence; the separation grid 21 is provided with a primary feeding end, a coarse material discharging end and a secondary discharging end; the cage rotor 23 is provided with a secondary feeding end, a finished product discharging end and a medium coarse material discharging end.
Further, the feeding device comprises a funnel-shaped inner plate 31, an inverted cone-shaped outer plate 32 and a cylindrical raw material feeding pipe 33 connected with the feeding hole 13, a middle coarse material recycling channel 34 connected with a middle coarse material discharging end is arranged in the middle of the inner plate 31, a secondary feeding channel is formed between the inner plate 31 and the outer plate 32 which are coaxially arranged, the feeding end of the secondary feeding channel is communicated with the raw material feeding pipe 33 only, and the discharging end of the secondary feeding channel is communicated with the primary feeding end at the top of the separation grid 21 only; a transit passage 4 for communicating the secondary discharge end and the secondary feed end is formed between the outer plate 32 and the housing 1.
Further, the discharge ports comprise a finished product discharge port 14 positioned at the top of the shell 1, a middle coarse material discharge port 15 positioned at the bottom of the shell 1 and a coarse material discharge port 16 positioned at the bottom of the shell 1; the discharging device comprises a finished product recycling device connected with the finished product discharging end and the finished product discharging opening 14, a middle coarse material recycling device connected with the middle coarse material recycling channel 34 and the middle coarse material discharging opening 15, and a coarse material recycling device connected with the coarse material discharging end and the coarse material discharging opening 16.
Further, the cage rotor 23 includes a rotor frame mounted on the main shaft 24 and guide blades uniformly distributed along the circumference of the rotor frame.
The power device 22 for driving the cage rotor 23 to rotate is a driving motor, and the driving motor drives the cage rotor 23 through a main shaft 24. As shown in fig. 12, the main shaft 24 includes a motor mount 231 for fixing and a transmission shaft for transmission.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.
Claims (8)
1. The powder selecting machine adopting the selecting grille to select comprises a shell (1) welded with a fixed foundation (001) at the outside and provided with a material selecting cavity at the inside, and a powder selecting mechanism, a feeding mechanism (3) and a discharging mechanism which are respectively arranged on the shell (1); the utility model discloses a powder selecting mechanism, including casing (1), feed mechanism (3), feed mechanism and powder selecting mechanism, be provided with air intake (11), air outlet (12), feed inlet (13), discharge gate on casing (1) inside and outside air intake (11), air outlet (12), feed mechanism (3), feed mechanism connects feed inlet (13) and powder selecting mechanism's feed end, discharge mechanism connects discharge gate and powder selecting mechanism's discharge end simultaneously, its characterized in that: the powder selecting mechanism comprises a sorting grid (21) for primary sorting, and a feeding end of the sorting grid (21) positioned at the top is connected with the feeding mechanism (3);
the shell (1) comprises an upper material receiving and discharging air cylinder, a multi-stage powder selecting cylinder and a lower material receiving and charging air cylinder which are sequentially connected into a whole from top to bottom, wherein each inner cavity forms a sorting cavity together, an air inlet (11) is arranged on the lower material receiving and charging air cylinder, and an air outlet (12) is arranged on the upper material receiving and discharging air cylinder; the separation cavity is sequentially provided with an upper powder separation area, a dynamic powder separation area and a lower powder separation area from top to bottom, and the separation grid (21) is positioned in the dynamic powder separation area and the lower powder separation area;
the sorting grid (21) comprises a plurality of inner grid plates (211) of a right circular table with a small upper part and a large lower part, a plurality of outer grid plates (212) of an inverted circular table with a large upper part and a small lower part, at least one grid plate (213) for simultaneously connecting the inner grid plates (211) and the outer grid plates (212), wherein the plurality of inner grid plates (211) refer to a plurality of inner grid plates (211) with the same structure and different maximum profile diameters, the plurality of outer grid plates (212) refer to a plurality of outer grid plates (212) with the same structure and different maximum profile diameters, the inner grid plates (211) positioned at the inner ring and the outer grid plates (212) positioned at the outer ring are coaxially and alternately arranged one by one along the central axis of the sorting grid (21) and are connected into a whole through the grid plates (213), and meanwhile, an air channel for the air supply to pass through rapidly and a sorting channel for the material to drop down step by step are formed between the inner grid plates (211) and the outer grid plates (212) which are thin-wall pieces; the material falling from the feeding end can be repeatedly turned back to impact on the outer grid plate and the inner grid plate, and the material is fully scattered by repeated acceleration impact.
2. A powder concentrator utilizing a classifying grid for classifying as set forth in claim 1, wherein: the powder selecting mechanism further comprises a power device (22) arranged outside the shell (1), a main shaft (24) arranged at the output end of the power device (22) and extending into the material sorting cavity, a cage rotor (23) arranged on the main shaft (24) and driven by the power device (22) through the main shaft (24), a cage rotor (23) for secondary sorting, a feeding mechanism (3) and a sorting grid (21) for primary sorting are coaxially arranged from top to bottom in sequence;
the feeding mechanism (3) is provided with a raw material feeding end for external materials to enter and a raw material discharging end communicated with the raw material feeding end through a transit passage (4);
the separation grid (21) is provided with a primary feeding end communicated with the raw material discharging end, a coarse material discharging end for screening coarse materials after primary separation and a secondary discharging end for screening intermediate materials after primary separation; an air duct and a sorting channel are communicated among the coarse material discharging end, the secondary discharging end and the primary feeding end;
the cage rotor (23) is provided with a secondary feeding end communicated with the secondary discharging end, a finished product discharging end for screening out finished product materials after secondary sorting and a medium coarse material discharging end for screening out medium coarse materials after secondary sorting.
3. A powder concentrator utilizing a classifying grid for classifying as set forth in claim 2, wherein: the feeding mechanism (3) comprises an inner plate (31) and an outer plate (32) which are of inverted cone-shaped integrally, and a cylindrical raw material feeding pipe (33) connected with the raw material feeding hole (13), wherein the inner plate (31), the outer plate (32) and the raw material feeding pipe (33) which are all thin-wall parts are connected into a whole, a transit passage (4) is formed between the inner plate (31) and the outer plate (32), and a plurality of secondary feeding passages which are separated by the raw material feeding pipe (33) are formed between the outer plate (32) and the inner wall of the shell (1); the upper end of the raw material feeding pipe (33) is a raw material feeding end, the lower end of the transit passage (4) is a raw material discharging end, the lower end of the raw material feeding pipe (33) is communicated with the raw material discharging end through the transit passage (4), and the secondary discharging end is communicated with the secondary feeding end through the secondary feeding passage.
4. A powder concentrator utilizing a classifying grid for classifying as set forth in claim 3, wherein: the discharging port comprises a finished product discharging port (14) positioned at the top of the shell (1), a middle coarse material discharging port (15) positioned at the bottom of the shell (1) and a coarse material discharging port (16) positioned at the bottom of the shell (1); the discharging mechanism comprises a finished product recycling device connected with the finished product discharging end and the finished product discharging opening (14), a middle coarse material recycling channel (34) connected with the middle coarse material discharging end and the middle coarse material discharging opening (15), and a coarse material recycling channel connected with the coarse material discharging end and the coarse material discharging opening (16).
5. A powder concentrator utilizing a classifying grid for classifying as set forth in claim 4, wherein: the middle coarse material recovery channel (34) vertically penetrates through the inner plate (31) from the center, and meanwhile, the middle coarse material recovery channel (34) is separated from the transit channel (4) and the secondary feeding channel; the top of the medium and coarse material recycling channel (34) corresponds to the medium and coarse material discharging end, and the maximum contour diameter of the inner plate (31) is larger than that of the cage rotor (23).
6. A powder concentrator utilizing a classifying grid for classifying according to any one of claims 2 to 5, wherein: the cage rotor (23) comprises a rotor frame mounted on a main shaft (24) and guide blades uniformly distributed along the circumference of the rotor frame.
7. A powder concentrator utilizing a classifying grid for classifying as set forth in claim 1, wherein: the plurality of inner grid plates (211) and the plurality of outer grid plates (212) are arranged in a complete set from top to bottom in the order of the largest outline diameter from small to large.
8. A powder concentrator utilizing a classifying grid for classifying as set forth in claim 1, wherein: the number of the grid plates (213) is plural, and the plurality of grid plates (213) are uniformly distributed along the circumferential direction of the central axis of the sorting grid (21).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114025862A (en) * | 2019-06-04 | 2022-02-08 | Fl史密斯公司 | Integrated separator |
| CN112246632B (en) * | 2020-09-28 | 2023-09-22 | 安徽笑果农牧产业科技有限公司 | Feed raw material impurity removing device and impurity removing method thereof |
| CN113899176B (en) * | 2021-08-27 | 2023-01-13 | 北京工业大学 | Centrifugal separation and drying integrated device |
| CN117840041B (en) * | 2024-03-07 | 2024-05-03 | 福建美宏科技有限公司 | Special grader for carbon powder |
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