CN203184236U - Material classification device - Google Patents

Abstract

The utility model provides a material classification device. The material classification device comprises a draught fan, a particle-size classification and settlement chamber, an airflow spraying pipe and a feed port, wherein the airflow spraying pipe is arranged on the side wall of the particle-size classification and settlement chamber, the feed port is formed in the side wall of the particle-size classification and settlement chamber, the airflow spraying pipe is connected with the draught fan, the straight line where the airflow spraying pipe is located and the straight line where the feed port is located have one intersection, the straight line where the airflow spraying pipe opening is located is a horizontal line, a plurality of hoppers are arranged at the bottom of the particle-size classification and settlement chamber, and the diameter of the airflow spraying pipe opening is eight times to 30 times the length of the average diameter of material particles. The material classification device utilizes adjustable high-speed airflow in the opening of the airflow spraying pipe to give different horizontal movement speeds to materials with different grain diameters according to specific surface area differences of the materials falling from the feed port, therefore, different horizontal movement distances are obtained, the materials freely fall to the corresponding hoppers at the bottom of the particle-size classification and settlement chamber under the action of the gravity of the materials, and the aim of classification is achieved. In addition, the materials do not make contact with any screening machinery body, no relative friction force is produced, and equipment losses are small.

Description

A kind of stock grading equipment

Technical field

The utility model relates to the stock grading apparatus field, especially, relates to a kind of stock grading equipment that can carry out real-time multi-layer classification to material.

Background technology

Vibrosieve equipment (as: linear vibrating screen, oval-shaped equal-thickness vibrating screen) is the visual plant of present solid material classification, is widely used in industries such as mine, building materials, coal separation, the energy, chemical industry.Vibrosieve equipment generally is the exciting force that utilizes vibrator (eccentric block or eccentric shaft) to produce, make sieve nest do periodically double vibrations along the exciting force direction, material circumference on compass screen surface is beated, regular to desired compass screen surface, to reach the classification purpose the stock grading of different size by different sieve apertures; Can adjust amplitude by the weight of adjusting eccentric block.

But there is following shortcoming in this equipment:

1, equipment branch of being merely able to carry out a particle diameter is scraped, and the material of a plurality of particle diameters then need use many screening plants simultaneously if desired;

2, screening plant adopts sieve plate to carry out stock grading, after sieve pore blockade, can cause screening efficiency obviously to descend, and has only 2-3 month the service life of sieve plate, the maintenance cost height; The equipment failure rate height, the life-span is short, and in general, the bulk life time of vibratory sieve equipment is about 5 years;

3, floor space is wide, to the requirement height of foundation of civil work; Each vibrosieve equipment has the vibrator of 2-3, and operation energy consumption is big, needs supporting independently dust pelletizing system.

The utility model content

The utility model purpose is to provide a kind of stock grading equipment, to solve the technical problem of multi-layer classification, reduction classifying equipoment fault rate simultaneously.

For achieving the above object, the utility model provides a kind of stock grading equipment, comprising that blower fan, grade branch fall the chamber and be arranged on described grade branch falls air-flow jet pipe and charging aperture on the sidewall of chamber, described air-flow jet pipe is connected with described blower fan, described air-flow jet pipe place straight line and described charging aperture place straight line have an intersection point, and described air-flow nozzle hole place straight line is horizontal line;

The bottom that falls the chamber at described grade branch arranges several hoppers, will be apart from the nearest hopper of described charging aperture as first hopper, and then the width of first hopper is W ₁:

W ₁=1.5*L ₁

${\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="HDA00003097537600011.png"\; state="\{\{state\}\}">L</figure-callout>}}_1={\mathrm{R\&rho;v}}_a^2\sqrt{\frac{2h}{g}}*\frac{3}{16\mathrm{\&gamma;d}}*(\sqrt{\frac{2(h+H)}{g}}-\sqrt{\frac{2h}{g}})$

Wherein, L ₁Be the horizontal flight distance of the material that falls into first hopper, R is resistance coefficient, and ρ is atmospheric density, v _aBe the horizontal velocity of the relative material of air-flow, h is air-flow nozzle hole diameter, and H is the vertical height that the bottom of chamber falls in charging aperture to grade branch, and γ is the density of material, and d is the material particular diameter of screening;

The diameter h of described air-flow nozzle hole is 8-30 times of material particles average diameter.

Preferably, the point of interface of the bottom that the chamber is fallen in vertical line and the grade branch at described air-flow nozzle exit place is as initial point, and the width of N hopper is the distalis of N hopper and the distance between the nearside point;

Nearside point is Tn:T with the distance of initial point _n=(L _n+ L _N-1)/2 n 〉=2

Namely the nearside point position of N hopper is to fall into the horizontal flight of horizontal flight distance and the material that falls into N-1 hopper of material of N hopper apart from half of sum;

The distance of distalis and initial point is Yn:Y _n=(3L _n-L _N-1)/2 n 〉=2;

The distalis position of N hopper be fall into N hopper material 3 times of horizontal flights distance and the material that falls into N-1 hopper horizontal flight apart from half of difference.

Preferably, the integral thickness of described material be the material average grain diameter 10-20 doubly.

Preferably, the grade between hopper distalis and the next hopper nearside point minute is fallen the bottom, chamber to be set to this section bottom mid point is two crossing inclined-planes at top.

Preferably, the afterbody that the chamber falls in described grade branch arranges deduster, and the bottom of described deduster arranges ash bucket.

Preferably, described deduster and described grade branch fall the relative other end in chamber and pipeline is set is connected to described blower fan.

Preferably, the grade between hopper distalis and next hopper nearside point minute is fallen bottom, chamber mid point baffle plate is set.

The utlity model has following beneficial effect:

1, realize multi-layer classification simultaneously: because the particle diameter difference of material, the specific area of material then can be different, and under certain drop, difference will appear in the speed of the material of different-grain diameter under the air-flow effect, the range ability difference of material on horizontal level.According to this principle, the utility model utilizes the high velocity air regulated of air-flow nozzle hole, specific area difference according to the material that falls from charging aperture, give the different-grain diameter material different horizontal movement speed, thereby obtain different horizontal movement distances, leaving, it falls with gravity fall to grade branch in the corresponding hopper of bottom, chamber again, realizes the classification purpose; The grade of material and horizontal range can be regulated by the current rate of blower fan, and be easy to use;

2, equipment failure rate is low: thus material is to obtain different horizontal velocity classifications with air-flow contact back, material does not contact any screening plant body in fact, does not have relative friction forces, and equipment loss is little, and the life-span is long;

3, little discharging: the equipment air-flow is recycling, and micronic dust can precipitate in cyclic process gradually, realizes zero-emission to external world, environmental protection.

Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.

With reference to figure, the utility model is described in further detail below.

Description of drawings

The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the device structure cutaway view of the utility model preferred embodiment;

Wherein, 1, blower fan, 2, the chamber falls in the grade branch, 3, the air-flow jet pipe, 4, charging aperture, 5, hopper, 6, deduster, 7, ash bucket, 8, baffle plate.

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the utility model can be implemented according to the multitude of different ways that claim limits and covers.

Referring to Fig. 1, a kind of stock grading equipment, comprising that blower fan 1, grade branch fall chamber 2 and be arranged on described grade branch falls air-flow jet pipe 3 and charging aperture 4 on 2 sidewalls of chamber, described air-flow jet pipe 3 is connected with described blower fan 1, described air-flow jet pipe 3 place straight lines and described charging aperture 4 place straight lines have an intersection point, and described air-flow jet pipe 3 outlet place straight lines are horizontal line;

In the bottom that chamber 2 falls in described grade branch several hoppers 5 are set, will be apart from the nearest hopper 5 of described charging aperture 4 as first hopper, then the width of first hopper is W ₁:

W ₁=1.5*L ₁

Consider dispersion and deviation in the material dropping process, with first hopper width W ₁Be made as material horizontal flight distance L ₁1.5 times, make material fall into the hopper center.

And fall into the horizontal flight distance L of the material of first hopper ₁Computational process such as following:

In air-flow, material is subjected to the directed force F of air-flow when air-flow is done relative motion size is:

F=Rρs(v _a-v) ²

In the formula, R is resistance coefficient, and with material shapes, surface nature is relevant with Reynolds number; ρ is atmospheric density, and unit is kg/m ³S is the front face area of material, and namely material is in the projected area of airflow direction, and unit is m ²v _aBe the absolute velocity of air-flow, unit is m/s; V is the absolute velocity of material, and unit is m/s.

In order to simplify calculating, do not consider the diffusion of spout air-flow, setting the speed of material before by spout is that 0(level, vertical component velocity are 0), material particular diameter is d, then material by the time t of spout is:

$t=\sqrt{\frac{2h}{g}}$

The horizontal component velocity v that obtains by spout of material so _LevelFor:

v _Level=Ft/m

In the formula, m is the quality of material particles, and unit is Kg.

Behind the abbreviation

In the formula, γ is the density of material, and unit is kg/m ³

To a certain fixture, fixing material,

It is a constant.

By above derivation, obtain material and at the horizontal range L that the drop of H moves be:

${\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="HDA00003097537600011.png"\; state="\{\{state\}\}">L</figure-callout>}}_1={\mathrm{R\&rho;v}}_a^2\sqrt{\frac{2h}{g}}*\frac{3}{16\mathrm{\&gamma;d}}*(\sqrt{\frac{2(h+H)}{g}}-\sqrt{\frac{2h}{g}})$

Wherein, L ₁Be the horizontal flight distance of the material that falls into first hopper, R is resistance coefficient, and ρ is atmospheric density, v _aBe the horizontal velocity of the relative material of air-flow, h is air-flow nozzle hole diameter, and H is the vertical height that the bottom of chamber falls in charging aperture to grade branch, and γ is the density of material, and d is the material particular diameter of screening.

For guaranteeing the classification efficiency of equipment, the material of system feeding mouth is evenly distributed, and the diameter h of described air-flow nozzle hole is 8-30 times of material particles average diameter, guarantees the penetrable material of air-flow.The integral thickness of material is the height that material particles is piled up, and then can be the 10-20 of material average grain diameter doubly.

Preferably, as initial point, the width of N hopper is the distalis of N hopper and the distance between the nearside point with the point of interface of the vertical line at described air-flow jet pipe 3 outlet places and the bottom that chamber 2 falls in the grade branch;

Nearside point and initial point be to fall into half of this hopper material horizontal flight distance and the difference that falls into last hopper material horizontal flight distance apart from Tn, again with fall into the horizontal flight of last hopper material apart from sum, that is:

T _n=（L _n-L _n-1）/2+L _n-1 n≥2

After the simplification, obtain:

T _n=（L _n+L _n-1）/2 n≥2

That is to say: the nearside point position of N hopper is to fall into the horizontal flight of horizontal flight distance and the material that falls into N-1 hopper of material of N hopper apart from half of sum.

The distance of distalis and initial point is that Yn falls into half of this hopper material horizontal flight distance and the difference that falls into last hopper material horizontal flight distance, again with fall into this hopper material horizontal flight apart from sum, that is:

Y _n=(L _n-L _n-1)/2+L _n n≥2

After the simplification, obtain:

Y _n=(3L _n-L _n-1)/2 n≥2；

That is to say: the distalis position of N hopper be fall into N hopper material 3 times of horizontal flights distance and the material that falls into N-1 hopper horizontal flight apart from half of difference.

For example, when the horizontal flight distance L of the material that falls into first hopper ₁Be 2m, fall into the horizontal flight distance L of the material of first hopper ₂Be 5m, fall into the horizontal flight distance L of the material of first hopper ₂During for 10m:

The width W of first hopper ₁=1.5*L ₁=1.5*2=3m

The nearside point of second hopper and initial point apart from T ₂=(L ₂+ L ₁)/2=(2+5)/2=3.5m

The distalis of second hopper and the distance Y of initial point ₂=(3L ₂-L ₁)/2=(3*5-2)/2=13/2=6.5m

The nearside point of the 3rd hopper and initial point apart from T ₃=(L ₃+ L ₂)/2=(10+5)/2=7.5m

The distalis of the 3rd hopper and the distance Y of initial point ₃=(3L ₃-L ₂)/2=(3*10-5)/2=25/2=12.5m.

Preferably, the bottom, chamber minute falls in grade that can be between hopper distalis and next hopper nearside point, and to be set to this section bottom mid point be two crossing inclined-planes at top, then take full advantage of the clearance spaces between two hoppers, make the material that falls into this clearance spaces fall into the both sides hopper along the inclined-plane.

Perhaps, grade that can be between hopper distalis and next hopper nearside point minute is fallen bottom, chamber mid point baffle plate is set, and material is kept off in the nearer hopper of this material drop point.

The afterbody that the chamber falls in described grade branch arranges deduster, and the bottom of described deduster arranges ash bucket, can make that micronic dust enters deduster with air-flow, and fall in the ash bucket naturally along with the depletion of air velocity.

Described deduster and described grade branch fall the relative other end in chamber and pipeline is set is connected to described blower fan, recycling fan airflow, environmental protection.

The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (7)

1. stock grading equipment, it is characterized in that, comprising that blower fan, grade branch fall the chamber and be arranged on described grade branch falls air-flow jet pipe and charging aperture on the sidewall of chamber, described air-flow jet pipe is connected with described blower fan, described air-flow jet pipe place straight line and described charging aperture place straight line have an intersection point, and described air-flow nozzle hole place straight line is horizontal line;

The bottom that falls the chamber at described grade branch arranges several hoppers, will be apart from the nearest hopper of described charging aperture as first hopper, and then the width of first hopper is W ₁:

W ₁=1.5*L ₁

$L_1={\mathrm{R\&rho;v}}_a^2\sqrt{\frac{2h}{g}}*\frac{3}{16\mathrm{\&gamma;d}}*(\sqrt{\frac{2(h+H)}{g}}-\sqrt{\frac{2h}{g}})$

Wherein, L ₁Be the horizontal flight distance of the material that falls into first hopper, R is resistance coefficient, and ρ is atmospheric density, v _aBe the horizontal velocity of the relative material of air-flow, h is air-flow nozzle hole diameter, and H is the vertical height that the bottom of chamber falls in charging aperture to grade branch, and γ is the density of material, and d is the material particular diameter of screening;

The diameter h of described air-flow nozzle hole is 8-30 times of material particles average diameter.

2. a kind of stock grading equipment according to claim 1, it is characterized in that, the point of interface of the bottom that the chamber is fallen in vertical line and the grade branch at described air-flow nozzle exit place is as initial point, and the width of N hopper is the distalis of N hopper and the distance between the nearside point;

Nearside point is Tn:T with the distance of initial point _n=(L _n+ L _N-1)/2 n 〉=2

Namely the nearside point position of N hopper is to fall into the horizontal flight of horizontal flight distance and the material that falls into N-1 hopper of material of N hopper apart from half of sum;

The distance of distalis and initial point is Yn:Y _n=(3L _n-L _N-1)/2 n 〉=2;

The distalis position of N hopper be fall into N hopper material 3 times of horizontal flights distance and the material that falls into N-1 hopper horizontal flight apart from half of difference.

3. a kind of stock grading equipment according to claim 1 is characterized in that, the integral thickness of described material is 10-20 times of material average grain diameter.

4. a kind of stock grading equipment according to claim 1 is characterized in that, the bottom, chamber minute falls in the grade between hopper distalis and the next hopper nearside point, and to be set to this section bottom mid point be two crossing inclined-planes at top.

5. a kind of stock grading equipment according to claim 1 is characterized in that, the afterbody that the chamber falls in described grade branch arranges deduster, and the bottom of described deduster arranges ash bucket.

6. a kind of stock grading equipment according to claim 5 is characterized in that, described deduster and described grade branch fall the relative other end in chamber and pipeline is set is connected to described blower fan.

7. a kind of stock grading equipment according to claim 1 is characterized in that, the grade between hopper distalis and next hopper nearside point minute is fallen bottom, chamber mid point baffle plate is set.

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