CN209753401U

CN209753401U - V-shaped powder concentrator

Info

Publication number: CN209753401U
Application number: CN201822230381.9U
Authority: CN
Inventors: 何亚民; 魏勇; 徐智平
Original assignee: Chengdu Leejun Industrial Co Ltd
Current assignee: Chengdu Leejun Industrial Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2019-12-10
Anticipated expiration: 2028-12-28

Abstract

The utility model discloses a V type selection powder machine relates to material selection powder equipment technical field. The utility model adds the powder homogenizer in the feeder of the V-shaped powder concentrator, and the powder homogenizer enables the materials to be diffused, distributed, pre-dispersed and rectified through the flow expansion layer, the material distribution layer and the rectification layer arranged on the feeding surface of the powder homogenizer, thereby forming a material curtain with uniformly distributed coarse powder and fine powder in the width direction of the powder concentration surface of the V-shaped powder concentrator; the air flow formed by the powder homogenizer penetrates through the feeding surface and penetrates through the material separating layer and the rectifying layer to prevent the materials from being accumulated; and a magnetic roller is arranged in the feeder, and the foreign matters of the iron pieces mixed in the material are removed through the magnetic attraction effect of the magnetic roller.

Description

V-shaped powder concentrator

Technical Field

the utility model relates to a material selection powder equipment technical field, especially V type selection powder machine.

Background

With the development of material grinding technology, a roller press (high-pressure roller mill) is widely applied, and a roller pressing grinding system combined by the roller press (high-pressure roller mill) and a powder concentrator is a high-efficiency and energy-saving grinding system and has a very wide application prospect in the mineral grinding production industry. The V-shaped powder concentrator which integrates drying, scattering and grading and is matched with a roller press (a high-pressure roller mill) is also greatly developed and widely applied.

The technological process of the combined rolling grinding system of the roller press (high-pressure roller mill) and the powder concentrator is generally as follows: the rolled material enters a V-shaped powder concentrator to grade the powder, the fine powder is pulled away by wind to form a product, and the coarse powder returns to a roller press (a high-pressure roller mill) to be continuously rolled. However, in use, the coarse powder outlet of the V-shaped powder concentrator contains a lot of fine powder, so that the fine powder yield of the V-shaped powder concentrator is insufficient, and the fine powder returns to a roller press (a high-pressure roller mill) to be continuously rolled, so that over-grinding is caused, and energy is wasted; in addition, if iron foreign matters enter the materials, or the iron pieces fall into the materials in a rolling and grinding circulation system, the iron pieces are continuously rolled circularly to cause serious damage to the roller surface, particularly to the stud roller surface, the stud is seriously broken, the service life of the roller surface is greatly shortened, and serious burden is caused to users.

disclosure of Invention

The utility model discloses a utility model aim at: to the unable abundant problem that leads to the fine powder overgrinding of separating of current selection powder machine farine middlings to and the unable separation ironware of current selection powder machine leads to the problem that the roll squeezer roller surface seriously damaged, the utility model provides a V type selection powder machine adds through the feeder at V type selection powder machine and establishes the powder homogenizer, makes the powder expand the flow, breaks up and the rectification in advance, thereby forms thick, the fine powder evenly distributed's material curtain on the selection powder face width direction of V type selection powder machine, and is provided with the magnetic drum in the feeder, attracts the effect through the magnetic drum and removes the ironware foreign matter of mixing in the material.

The utility model adopts the technical scheme as follows:

According to the utility model discloses a V type selection powder machine, which comprises a housin, the casing has main feed inlet, coarse fodder export, air intake and air outlet, form material passageway through "V" shape cascade of a plurality of groups with predetermined interval slope superpose between the main feeding of casing and the coarse fodder export, be provided with the rotor by drive arrangement driven in the casing, rotor non-drive side has the fine powder export and communicates with the air outlet, the main feed inlet department of casing is provided with the feeder, be provided with the powder homogenizer in the feed inlet of feeder, the powder homogenizer have with the feeding face of vertical direction skew, longitudinal separation is provided with the diffusion layer, the layering and the rectifying layer that are used for the material to break up the homogenization on the feeding face in proper order, makes the material form the material curtain of dispersion in material passageway.

Due to the arrangement, materials entering the V-shaped powder concentrator sequentially pass through the flow expansion layer, the material separation layer and the rectifying layer which are arranged on the obliquely-arranged feeding surface at intervals in the longitudinal direction under the action of gravity, so that the materials form a dispersed material curtain in the material channel, fine powder can be completely separated when flowing through the winnowing channel, the situation that the fine powder is rolled in a recycling manner along with coarse powder at a coarse material outlet due to material accumulation is avoided, over grinding is caused, and the selection amount of the fine powder is increased.

Further, the powder homogenizer forms a gas flow which passes through the feed surface and penetrates the dividing layer and the rectifying layer, and the direction of the gas flow is parallel or obliquely downward relative to the horizontal direction. The powder homogenizer comprises a homogenizer body, wherein the homogenizer body is provided with a closed inner cavity, and the inner cavity is provided with an air supply device; the homogenizer body outside is provided with the silo, the silo tank bottom is the feeding surface, set up a plurality of intercommunication inner chambers's air guide hole on the feeding surface.

Due to the arrangement, the airflow formed by the powder homogenizer penetrates through the feeding surface from the powder homogenizer, and the fine powder and the coarse powder separated from the crushed cake are separated from the powder homogenizer under the action of the airflow in the process that the airflow penetrates through the material separating layer and the rectifying layer, so that the separated fine powder and the separated coarse powder are not accumulated on the material separating layer and the rectifying layer any more, the actual throughput is increased, and the yield is increased; meanwhile, the horizontal or inclined downward airflow keeps a certain distance between the insufficiently crushed materials all the time, and generates a component force which is vertical to the feeding surface and a component force which is downward along the feeding surface to the materials, so as to push the materials to move downward, and avoid the accumulation and the blockage of the materials caused by the fact that the materials cannot be discharged from the material distributing layer or the rectifying layer in time.

Further, the flow expansion layer is provided with a plurality of flow expansion channels with the width increasing along with the height reduction; the material distribution layer comprises a first-grade material distribution layer and a second-grade material distribution layer which are arranged at intervals from top to bottom, the first-grade material distribution layer is provided with a plurality of first-grade sub-runners, the flow expansion runners are opened towards at least two adjacent first-grade sub-runners along the extending direction of the flow expansion runners, the second-grade material distribution layer is provided with a plurality of second-grade sub-runners, and the first-grade sub-runners are opened towards at least two adjacent second-grade sub-runners along the extending direction of; the rectifying layer is provided with a plurality of rectifying channels, and the secondary sub-channels adjacent to the rectifying layer are opened towards at least two rectifying channels along the extending direction of the secondary sub-channels; the width of the first-stage branch runner and the width of the second-stage branch runner are reduced along with the reduction of the height, and the whole runner is a linear runner and is constant in width.

Furthermore, a feeding position for feeding materials is arranged at the top of the trough, and the width of the feeding position is smaller than that of the feeding surface; the flow expansion layer comprises at least three flow expansion plates fixed on the feeding surface at intervals, the at least three flow expansion plates incline towards the feeding position, and a flow expansion channel is formed between every two adjacent flow expansion plates; the first-stage material distribution layer comprises at least three first-stage material distribution nozzles which are horizontally arranged on the feeding surface at equal intervals, each first-stage material distribution nozzle is provided with two inclined planes which incline oppositely, and the inclined plane of each first-stage material distribution nozzle and the inclined plane of the adjacent first-stage material distribution nozzle or the side wall of the trough form a first-stage material distribution channel; the second-stage material distribution layer comprises at least four material distribution nozzles which are horizontally arranged on the feeding surface at equal intervals, the second-stage material distribution nozzles are provided with two inclined planes which are inclined oppositely, and the inclined planes of the second-stage material distribution nozzles and the inclined planes of the adjacent second-stage material distribution nozzles or the side wall of the material groove form a second-stage branch flow channel; the rectifying layer comprises at least five rectifying parts, the rectifying parts are plate-shaped or columnar, the at least five rectifying elements are horizontally arranged on the feeding surface at equal intervals, and a rectifying channel is formed between each rectifying element and the adjacent rectifying element or the side wall of the trough.

Due to the arrangement, the flow expansion layer mainly has the functions of dispersing and spreading accumulated materials in the flow expansion channel with gradually increased width, the material distribution layer further disperses the materials through the primary flow distribution channel and the secondary flow distribution channel, and the collision between the materials and the channel wall are increased by setting the primary flow distribution channel and the secondary flow distribution channel into the approximately V-shaped structure with gradually decreased width, so that the materials are dispersed and uniformly distributed; the flow regulating layer has the functions of further flow distribution and flow regulation, the straight flow regulating channel enables the materials falling linearly along the feeding surface to directly pass through, and the materials falling non-linearly recover to a natural linear falling state after at least one collision. The collision of the materials with the side walls of the first-stage branch channel and the second-stage branch channel enables the materials to be uniformly distributed in the width direction of the whole V-shaped powder concentrator, and the gaps among material particles are enlarged by multiple times of diversion. After entering the V-shaped powder concentrator, the materials conveyed by the powder homogenizer sink along the action of gravity in a material channel formed by a plurality of groups of blade grids, wherein the coarse powder continuously sinks along the material channel and is discharged from a coarse material outlet, and the fine powder leaves the material channel along the gaps between the blade grids under the action of wind power.

Furthermore, the included angle between the feeding surface and the vertical direction is alpha, and the range of the alpha is 0-50 degrees; the number of the first-stage branch runners is greater than that of the expansion runners; the number of the secondary branch passages is larger than that of the primary branch passages.

Due to the arrangement, the material can be decelerated by the inclined arrangement of the feeding surface, the friction between the material and the feeding surface is increased, and the shunting and scattering efficiency is improved; the number of the flow expanding channel, the first-stage flow distribution channel and the second-stage flow distribution channel is increased in sequence, so that material distribution and uniform distribution are realized.

furthermore, a magnetic roller is arranged in the feeder and fixed below the powder homogenizer; the magnetic drum is characterized in that a material passing area and a tail throwing area are formed on two sides of the longitudinal axial surface of the magnetic drum respectively, the magnetic drum adsorbs iron pieces in the material passing area along the rotation direction of the magnetic drum and releases the iron pieces into the tail throwing area, and a material conveying opening of the feeder is communicated with the material passing area.

Due to the arrangement, the magnetic roller enables the iron pieces mixed in the material flow to be adsorbed on the magnetic roller and thrown to the tail throwing area, so that the iron pieces are separated from the material, and the service life of the roller surface of a roller press (a high-pressure roller mill) is prolonged. Meanwhile, the adoption of the magnetic roller to remove the iron piece can not influence the uniform material curtain formed by the powder homogenizer through flow distribution, pre-scattering and rectification. The roll surface of a roll squeezer (high-pressure roller mill) is a vulnerable part and is a key part influencing the working efficiency and the cost of the roll squeezer. External iron pieces or high-hardness studs damaged and falling from stud roll surfaces enter a grinding circulation formed by a rolling machine (a high-pressure roller mill) and a V-shaped powder concentrator, so that the roll surfaces, particularly the stud roll surfaces, are damaged in a linkage manner, and great inconvenience is brought to production work.

Furthermore, a detachable flexible material baffle plate is arranged in the tail throwing area, one end of the flexible material baffle plate is fixed on the inner wall of the feeder, and the other end of the flexible material baffle plate naturally droops and is pressed on the magnetic roller in a propping mode.

Due to the arrangement, the flexible material baffle is arranged above the magnetic roller, the material passing area above the magnetic roller is separated from or partially separated from the tail throwing area, and fine powder and coarse powder descending along with airflow are prevented from entering and depositing in the tail throwing area.

Further, an air locking valve is arranged at the bottom of the tail throwing area; the magnetic roller comprises a roller and a magnetic system arranged in the roller, the magnetic system is laid along at least part of the inner circumferential surface of the roller in the material passing area, and the lower end of the magnetic system is close to or partially enters the tail throwing area; the magnetic system is a permanent magnet set, and the magnetic field intensity of the permanent magnet set is 600Gs-3000 Gs.

due to the arrangement, the air locking valve arranged at the bottom of the tail throwing area automatically controls the discharge of the iron piece, and the working efficiency is improved. When the weight of the iron piece stacked in the throwing tail area exceeds the valve balance weight of the air locking valve, the air locking valve is automatically opened to discharge the iron piece, and the air locking valve after the iron piece is discharged is automatically closed.

furthermore, the V-shaped blade grids comprise air guide blade grids close to the air inlet and material guide blade grids close to the air outlet, a blade grid channel for communicating the air inlet and the air outlet is formed between two adjacent groups of V-shaped blade grids, and an air guide adjusting blade grid is movably arranged on one side of the air guide blade grids close to the air inlet.

Due to the arrangement, the materials are subjected to multi-stage shunting, scattering and rectifying treatment by the powder homogenizer of the feeder to form uniformly distributed material curtains in the width direction of the powder selecting surface of the V-shaped powder selecting machine, so that the content of fine powder in coarse powder can be greatly reduced, and the selecting efficiency and the yield of fine powder are greatly improved; the magnetic roller of the feeder enables the V-shaped powder concentrator to have the iron removal function, so that materials in a rolling and grinding system combining a roller press (a high-pressure roller mill) and the powder concentrator do not contain iron foreign matters, and when the materials are rolled, the materials are not damaged to a roller surface, so that the service life of the roller surface is greatly prolonged; the air inlet amount of the material channel is controlled by the adjustable air guide adjusting blade grid, and the powder selecting fineness is adjusted.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. The utility model discloses a vertical interval arrangement on the oblique feeding surface expand the class and spread and break up the material that gets into the feeder in advance through the diffusion layer, the part of material layer and the rectifying layer, separate middlings, farine, and enlarge its interval, make farine and middlings disperse and the homogenization distributes, the V type selection powder machine of being convenient for improves the selection powder efficiency, avoids the farine to be wrapped up in by the middlings and causes the overgrinding;

2. The utility model discloses the air current that the powder homogenizer formed passes the feeding face from the powder homogenizer, pierces through layering and rectifying layer through the gas guide hole, makes the fine powder that has separated and middlings break away from the powder homogenizer, and produces a perpendicular to feeding face up component and a component along feeding face down to the material that piles up, promotes the material and moves downwards, avoids the material to pile up and causes the card material;

3. The inclined arrangement of the feeding surface of the utility model can assist the deceleration of the material and improve the shunting efficiency; the number of the flow expanding channel, the primary shunt channel and the secondary shunt channel is sequentially increased, so that material shunting and pre-scattering are realized;

4. The flow expanding plate of the utility model forms a linear type flow expanding channel side wall to prevent the material from accumulating; the width of the flow expanding channel is increased along with the movement direction of the materials, so that the gathered materials are separated and flatly paved on a feeding surface;

5. The wedge-shaped material distributing nozzle of the utility model can effectively prevent the materials from accumulating and detaining in the powder homogenizer; the side walls of the primary sub-runners and the secondary sub-runners formed by the inclined planes can increase the probability of random ejection of materials among a plurality of primary sub-runners or secondary sub-runners, and enhance the pre-scattering effect;

6. The rectifying layer of the utility model has the effects of further shunting and rectifying;

7. The utility model arranges the magnetic roller in the feeder, which separates the foreign matters from the materials on the premise of not influencing the materials to form a uniformly distributed material curtain, thereby prolonging the service life of the roller surface of the roller press (high-pressure roller mill); the air locking valve arranged at the bottom of the tail throwing area automatically controls the discharge of the iron piece, so that the working efficiency is improved;

8. the utility model discloses a V type selection powder machine can form evenly distributed's material curtain at the selection powder face width direction of "V" shape cascade, can the farine content in the middlings that significantly reduces, makes its selection do not efficiency and farine output improve greatly.

Drawings

Fig. 1 is a schematic front sectional view of the V-type powder concentrator of the present invention;

Fig. 2 is a schematic left-side sectional structure view of the V-shaped powder concentrator of the present invention;

FIG. 3 is a schematic cross-sectional view of the feeder of the present invention;

FIG. 4 is a front view of a powder homogenizer in an embodiment of the present invention;

FIG. 5 is a front view of a powder homogenizer in another embodiment of the present invention;

Fig. 6 is a schematic sectional structure view of the magnetic drum of the present invention;

The labels in the figure are: 1-a shell; 2-main feed inlet; 3-a feeder; 4-air inlet; 5-wind guide blade cascade; 6-wind guiding and adjusting blade cascade; 7-coarse material outlet; 8-guiding the material cascade; 9-a rotor; 10-air outlet; 310-powder homogenizer; 320-a magnetic roller; 330-airlock valve; 340-a flexible striker plate; 311-material groove; 312-a flow expansion plate; 313-first fraction nozzle; 314-a secondary feed nozzle; 315-a rectifying element; 316-flow expansion channel; 317-first-level shunt channel; 318-secondary runner; 319-flow finishing; 321-a roller; 322-magnetic system; the included angle between the alpha-feeding surface and the vertical direction; i-a material passing area; ii-tail polishing zone.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

the V-shaped powder concentrator disclosed in this embodiment is described with reference to fig. 1-2, which includes a casing 1, the casing 1 has a main feed port 2, a coarse material outlet 7, an air inlet 4 and an air outlet 10, a plurality of groups of "V" shaped blade cascades obliquely stacked at a predetermined interval are disposed between the main feed port and the coarse material outlet 7 of the casing 1, a material passage penetrating the main feed port 2 and the coarse material outlet 7 is formed in the middle of the "V" shaped blade cascades, a rotor 9 driven by a driving device is further disposed in the casing 1, a fine powder outlet is disposed on a non-driving side of the rotor 9 and communicated with the air outlet 10, and a feeder 3 is disposed at the main feed port 2 of the.

In an implementation manner of this embodiment, the "V" shaped cascade includes a wind guiding cascade 5 close to the wind inlet 4 and a guide cascade 8 close to the wind outlet 10, and a cascade channel communicating the wind inlet 4 and the wind outlet 10 is formed between two adjacent groups of "V" shaped cascades. In another embodiment, the "V" shaped blade cascade includes an air guiding blade cascade 5, a guiding blade cascade 8 and an air guiding adjusting blade cascade 6, the air guiding adjusting blade cascade 6 is movably disposed on one side of the air guiding blade cascade 5 close to the air inlet 4, and the air guiding adjusting blade cascade 6 is used for adjusting the ventilation volume and the air speed of the blade cascade channel.

The feeder 3 of the present embodiment is described with reference to fig. 3, which has a material distribution chamber penetrating an upper and a lower feed opening and a material delivery opening, the feed opening of the feeder 3 is provided with a powder homogenizer 310, a magnetic roller 321320 is provided below the powder homogenizer 310, the material distribution chamber on both sides of the longitudinal axial surface of the magnetic roller 321320 is respectively formed with a material passing region i and a tailing discarding region ii, the magnetic roller 321320 sequentially adsorbs and releases iron pieces along the rotation direction thereof and throws the iron pieces to the tailing discarding region ii, and the bottom of the feeder 3 is provided with a material delivery opening communicating the material passing region i. Preferably, when viewed in cross section, during the falling of the material from the powder homogenizer 310 to the magnetic roller 321320, the component force generated by the impact force of the falling material in the tangential direction of the force-bearing point of the magnetic roller 321320 is opposite to the tangential force generated by the rotation of the magnetic roller 321320 at the force-bearing point.

in this embodiment, a detachable flexible striker plate 340 is arranged in the tailing discarding area ii, one end of the flexible striker plate 340 is fixed on the inner wall of the feeder, the other end of the flexible striker plate 340 naturally droops and movably abuts against and presses the magnetic roller 321, and a wear-resistant block is arranged at one end of the flexible striker plate 340 abutting against the magnetic roller 321. The flexible striker plate 340 may be replaced with a curtain of polyester fiber.

In this embodiment, as shown in fig. 6, the magnetic roller 321320 includes a roller 321 and a magnetic system 322 disposed in the roller 321, the magnetic system 322 is fixed with respect to the polishing tail region ii, and the roller 321 rotates with respect to the magnetic system 322; the magnetic system 322 is a permanent magnet group, and the magnetic field intensity of the permanent magnet group is 600Gs-3000 Gs.

In this embodiment, the magnetic system 322 is laid along at least a portion of the inner circumferential surface of the roller 321 in the material passing region i, and the lower end of the magnetic system 322 is close to or at least partially enters the tail-throwing region ii; and the air locking valve 330 is arranged at the bottom of the tail throwing area ii.

referring to FIG. 4, an embodiment of the powder homogenizer 310 in this embodiment is illustrated, which comprises a homogenizer body having a sloping platform shape, wherein a trough 311 is disposed on the side contacting with the material, and the bottom of the trough 311 is the feeding surface. The feeding surface is sequentially provided with a flow expansion layer, a material separating layer and a rectifying layer at intervals from top to bottom, the powder homogenizer forms air flow which penetrates through the feeding surface and the material separating layer and the rectifying layer, and the air flow direction is parallel or obliquely downward relative to the horizontal direction. Preferably, the homogenizer body is provided with a closed inner cavity, the inner cavity is provided with an air supply device, and the feeding surface is provided with a plurality of air guide holes communicated with the inner cavity. The air supply device supplies horizontal airflow to the material separating layer and the rectifying layer through the air guide holes.

In this embodiment, the feeding surface is rectangular, and the feeding surface is disposed at an acute included angle with the vertical direction, wherein the included angle between the feeding surface and the vertical direction is α, and the angle range of α is preferably 35-40 °. The top of the trough 311 is provided with a feeding position for feeding materials, and the feeding position can be arranged at any position of the top of the trough 311. In this embodiment, the feeding position is located on the left side of the top of the feeding surface in front view. The upper part of the feeding surface is provided with a flow expansion plate 312 for shunting materials, four flow expansion plates 312 are fixed on the feeding surface at intervals, and a flow expansion channel 316 is formed between every two adjacent flow expansion plates 312; the four flow expansion plates 312 are inclined towards the feeding position, the inclination directions are the same, and the inclination angles are gradually increased or decreased, so that the width of the flow expansion channel 316 is increased along with the decrease of the height; the material enters the chute 311 at a predetermined angle through the feed point and is divergently diverted under the guidance of the plurality of diverging channels 316.

in this embodiment, the material separating layer includes a first-stage material separating layer and a second-stage material separating layer which are sequentially arranged from top to bottom at intervals, wherein the first-stage material separating layer includes four first-stage material separating nozzles 313 arranged on the feeding surface at equal intervals, and the second-stage material separating layer includes five second-stage material separating nozzles 314 arranged on the feeding surface at equal intervals. The first-stage distributing nozzle 313 and the second-stage distributing nozzle 314 are identical in structure and are wedge-shaped, and the wedge-shaped structure is provided with two oppositely inclined planes, and the tip of the wedge-shaped structure faces upwards. The lower ends of the four first-stage distributing nozzles 313 are respectively aligned with the gaps between the five second-stage distributing nozzles 314. The inclined surface of the first-stage distributing nozzle 313 and the inclined surface of the adjacent first-stage distributing nozzle 313 or the side wall of the trough 311 form a first-stage sub-runner 317, the inclined surface of the second-stage distributing nozzle 314 and the inclined surface of the adjacent second-stage distributing nozzle 314 or the side wall of the trough 311 form a second-stage sub-runner 318, wherein the number of the first-stage sub-runners 317 is larger than that of the flow expanding runners 316, and the number of the second-stage sub-runners 318 is larger than that of the first. The flow expansion channel 316 is open to two adjacent primary branch channels 317 in the extending direction thereof, and the primary branch channels 317 are open to two adjacent secondary branch channels 318 in the extending direction thereof. The material slides down along the flow expansion channel 316, and under the action of inertia and gravity, the material falls into one of the two primary sub-channels 317 corresponding to the lower part of the flow expansion channel 316, most of the material impacts the inclined surface of the primary sub-channel 313, and then is ejected into the two sub-channels corresponding to the lower part of the primary sub-channel 317 and collides with the secondary distributing nozzle 314 again.

In this embodiment, the rectifying layer is disposed at the bottom of the feeding surface, the rectifying layer includes ten columnar rectifying elements 315, each rectifying element 315 and the adjacent rectifying element 315 or the side wall of the trough 311 form a rectifying channel 319, two secondary sub-channels 318 at the left and right sides of the secondary material distribution layer are open towards the lower two rectifying channels 319 along the extending direction thereof, four secondary sub-channels 318 in the middle of the secondary material distribution layer are open towards the lower three rectifying channels 319 along the extending direction thereof, and the number of the rectifying channels 319 is greater than that of the secondary sub-channels 318. The materials are diffused, pre-dispersed and shunted by the first-stage material distributing layer and the second-stage material distributing layer and then enter the rectifying layer for rectification. The first-stage runner 317 and the second-stage runner 318 are substantially V-shaped, so that the materials impacted on the inclined planes on the two sides finally slide downwards along the inclined directions of the inclined planes, the probability of oblique movement and mutual collision of the materials is increased, multiple times of impacts are generated, different movement tracks of the fine powder and the coarse powder separated by the impacts are generated, and the distance between the fine powder and the coarse powder in the material curtain is increased and uniformly distributed. The rectifying element 315 is a columnar structure, a short and flat rectifying channel 319 is formed, most of the powder material directly passes through the rectifying channel 319 to fall, and a small amount of obliquely moving powder material does parabolic motion after being impacted with the columnar rectifying element 315 and linearly falls through the rectifying channel 319, so that a certain rectifying effect is achieved.

Referring to fig. 5, another embodiment of the powder homogenizer 310 in the present embodiment is described, which includes a powder homogenizer body, the powder homogenizer body is in the form of a trough plate, a trough 311 is disposed on the side of the powder homogenizer body contacting with the material, the bottom of the trough 311 is a feeding surface, and a flow spreading layer, a material separating layer and a flow rectifying layer are sequentially disposed on the feeding surface from top to bottom at intervals.

In this embodiment, the feeding surface is rectangular, and the feeding surface is disposed at an acute included angle with the vertical direction, wherein the included angle between the feeding surface and the vertical direction is α, and the angle range of α is preferably 45-50 °. The top of the trough 311 is provided with a feeding position for feeding materials, and the feeding position is positioned at the left side of the top of the feeding surface in a front view. The upper part of the feeding surface is provided with a flow expansion plate 312 for shunting materials, six flow expansion plates 312 are fixed on the feeding surface at intervals, and a flow expansion channel 316 is formed between every two adjacent flow expansion plates 312; the six flow expansion plates 312 are all inclined towards the feeding position, from left to right, the included angle between the flow expansion plates 312 and the horizontal plane is gradually reduced, and the material passes through the feeding position at a preset angle to enter the material groove 311 and is guided by the plurality of flow expansion channels 316 to be diffused and divided.

In this embodiment, the material separating layer includes a first-stage material separating layer and a second-stage material separating layer which are sequentially arranged from top to bottom at intervals, wherein the first-stage material separating layer includes twelve first-stage material separating nozzles 313 which are horizontally arranged on the feeding surface at equal intervals, and the second-stage material separating layer includes thirteen second-stage material separating nozzles 314 which are horizontally arranged on the feeding surface at equal intervals. The first-stage distributing nozzle 313 and the second-stage distributing nozzle 314 are identical in structure and are in a diamond shape or an olive shape, the upper portion of the first-stage distributing nozzle is provided with two inclined planes or arc surfaces which incline oppositely, and the lower portion of the first-stage distributing nozzle is provided with two inclined planes or arc surfaces which incline oppositely. The lower portions of the twelve first stage nozzles 313 are aligned with the gaps between the thirteen second stage nozzles 314, respectively. The inclined surface of the first-stage distributing nozzle 313 and the inclined surface or the side wall of the trough 311 of the adjacent first-stage distributing nozzle 313 form a first-stage sub-runner 317, and the inclined surface of the second-stage distributing nozzle 314 and the inclined surface or the side wall of the trough 311 of the adjacent second-stage distributing nozzle 314 form a second-stage sub-runner 318. The flow expansion channel 316 is open toward the adjacent three primary flow-splitting channels 317 in the extending direction thereof, and the primary flow-splitting channels 317 are open toward the adjacent two secondary flow-splitting channels 318 in the extending direction thereof.

In this embodiment, the rectifying layer is disposed at the bottom of the feeding surface, the rectifying layer includes 26 plate-shaped rectifying elements 315, each rectifying element 315 and the adjacent rectifying element 315 or the side wall of the trough 311 form a straight rectifying channel 319 with a predetermined length, two secondary sub-channels 318 on the left and right sides of the secondary material distribution layer are open towards the lower two rectifying channels 319 along the extending direction thereof, and four secondary sub-channels 318 in the middle of the secondary material distribution layer are open towards the lower three rectifying channels 319 along the extending direction thereof. The rectifying layer restricts the motion range and motion track of the powder through the straight rectifying channel 319, so that the powder returns to the motion state of straight falling.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The V-shaped powder concentrator comprises a shell (1), wherein the shell (1) is provided with a main feeding hole (2), a coarse material outlet (7), an air inlet (4) and an air outlet (10), a material channel is formed between the main feeding hole and the coarse material outlet (7) of the shell (1) through a plurality of groups of V-shaped blade grids obliquely superposed at preset intervals, and the V-shaped powder concentrator is characterized in that a feeder (3) is arranged at the main feeding hole (2) of the shell (1), a powder homogenizer (310) is arranged in the feeding hole of the feeder (3), the powder homogenizer (310) is provided with a feeding surface obliquely crossed with the vertical direction, and a flow spreading layer, a material distributing layer and a flow rectifying layer for scattering and homogenizing materials are sequentially and longitudinally arranged on the feeding surface at intervals, so that the materials form a scattered material curtain in the material channel.

2. The V-type powder concentrator of claim 1, wherein the powder homogenizer (310) forms an air flow through the feed surface and through the segregating layer and the rectifying layer, the air flow direction being parallel or obliquely downward with respect to the horizontal direction.

3. the V-type powder concentrator of claim 2, wherein the powder homogenizer (310) comprises a homogenizer body having a closed inner cavity provided with air supply means; the homogenizer body outside is provided with silo (311), silo (311) tank bottom is the feeding surface, set up a plurality of air guide holes that communicate the inner chamber on the feeding surface.

4. The V-shaped powder concentrator according to claim 1, 2 or 3, wherein the flow expansion layer is provided with a plurality of flow expansion channels (316) with the width increasing along with the height decreasing; the material distribution layer comprises a first-stage material distribution layer and a second-stage material distribution layer which are arranged at intervals from top to bottom, the first-stage material distribution layer is provided with a plurality of first-stage sub-runners (317), the flow expansion channel (316) is opened towards at least two adjacent first-stage sub-runners (317) along the extending direction of the flow expansion channel, the second-stage material distribution layer is provided with a plurality of second-stage sub-runners (318), and the first-stage sub-runners (317) are opened towards at least two adjacent second-stage sub-runners (318) along the extending direction of; the rectifying layer is provided with a plurality of rectifying channels (319), and secondary sub-channels (318) adjacent to the rectifying layer are opened towards at least two rectifying channels (319) along the extending direction of the secondary sub-channels; the widths of the primary runner (317) and the secondary runner (318) decrease with decreasing height.

5. The V-type powder concentrator of claim 4, wherein the angle between the feed surface and the vertical is α, which is in the range of 0-50 °; the number of the first-stage branch channels (317) is larger than that of the flow expanding channels (316); the number of the secondary branch passages (318) is larger than that of the primary branch passages (317).

6. the V-shaped powder concentrator according to claim 1 or 2 or 3 or 5, characterized in that a magnetic roller (320) is arranged in the feeder (3), and the magnetic roller (320) is fixed below the powder homogenizer (310); the two sides of the longitudinal axis surface of the magnetic roller (320) are respectively provided with a material passing area (i) and a tail throwing area (ii), the magnetic roller (320) adsorbs iron pieces in the material passing area (i) along the rotating direction of the magnetic roller and releases the iron pieces into the tail throwing area (ii), and a feeding port of the feeder (3) is communicated with the material passing area (i).

7. the V-shaped powder concentrator according to claim 6, wherein a detachable flexible baffle plate (340) is arranged in the tail throwing area (ii), one end of the flexible baffle plate (340) is fixed on the inner wall of the feeder (3), and the other end of the flexible baffle plate (340) naturally droops and movably presses against the magnetic roller (320).

8. The V-shaped powder concentrator according to claim 6, wherein the bottom of the tail throwing area (ii) is provided with a wind locking valve (330); the magnetic roller (320) comprises a roller (321) and a magnetic system (322) arranged in the roller (321), the magnetic system (322) is paved along at least part of the inner circumferential surface of the roller (321) in the material passing zone (i), and the lower end of the magnetic system (322) is close to or partially enters the polishing zone (ii); the magnetic system (322) is a permanent magnet group, and the magnetic field intensity of the permanent magnet group is 600Gs-3000 Gs.

9. the V-shaped powder concentrator as claimed in claim 1, 2, 3, 5, 7 or 8, wherein the V-shaped blade cascade comprises an air guide blade cascade (5) close to the air inlet (4) and a material guide blade cascade (8) close to the air outlet (10), a blade cascade channel for communicating the air inlet (4) with the air outlet (10) is formed between two adjacent groups of V-shaped blade cascades, and an air guide adjusting blade cascade (6) is movably arranged on one side of the air guide blade cascade (5) close to the air inlet (4).