CN2183223Y

CN2183223Y - High-efficiency powder-sorting machine

Info

Publication number: CN2183223Y
Application number: CN 94207353
Authority: CN
Inventors: 杨剑; 翟金璋
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-18
Filing date: 1994-03-18
Publication date: 1994-11-23
Anticipated expiration: 2004-03-18

Abstract

The utility model relates to a high-efficiency powder-sorting machine. The high-efficiency powder-sorting machine is provided with a spiral disk with an airflow material inlet along the connecting point of the lower end of a barrel body and a cone discharging bucket, the upper part of the barrel body is provided with a conical coarse-sorting separator which corresponds to a fine-sorting separator arranged on the upper end of the barrel body, two separation regions are partitioned through a lining barrel, the inlets of a primary collector and a secondary collector which are radically and uniformly distributed by the barrel body of a fine-sorting region are connected in series along a tangential direction, and the inner part of the secondary collector is provided with a dust removing pipe which is communicated with an air outlet to compose a multi-stage cyclone separating system. The utility model has reasonable structure and high work efficiency, the feed rate of the high-efficiency powder-sorting machine is 7000 kg/h, the utility model can strictly control the sorting granularity of material, and the highest sorting granularity can reach 2000 mesh.

Description

High-efficiency powder-sorting machine

The utility model belongs to a kind of material separator, specifically in a kind of material being diffused in air-flow carry out sorting unit in the air-flow.

At present, the material powder concentrator of domestic production and use, mainly contain two kinds, centrifugal classifier, it is by the top classification of cylindrical shell the centrifugal charging tray of removing to be housed, the rotation vanelets, big blade is formed, feeding pipe is directly corresponding to removing charging tray, start motor after, the central shaft rotation, the material that is entered by the top feeding pipe is fallen and is removed on the charging tray, like that action of centrifugal force is diffused in the air-flow in the tube material, bigger particle bumps against on the inwall cloth and loses speed and come off along wall, bumps against again through vanelets the time than granule and is thrown on the blade on the wall and fall, from meal, discharge, simultaneously, littler particle is through vanelets, the air-flow that big blade rotation produces is selected in the fine powder bucket, finishes the sorting of material.Shortcoming is that to sort granularity low.Usually sorting fineness is the 200-300 order, and the aidr bells blast system of Raymond mill also can only sort about 500 orders.The 2nd, select in the finished product behind the powder, mixing in a large number between thick, the fine powder, thereby have the strict efficiency that sorts.

In recent years, done improvement, designed a kind of cyclone type powder sorting machine again at centrifugal classifier.It has cancelled big blade, and with the blower fan replacement of outer device, fines collection is finished by cyclone separator, and each whirlwind tube all directly links to each other with cylindrical shell.After starting, fall removing on the charging tray of rotation by the material that the top feeding pipe adds, cast aside by centrifugal action, at this moment, tangentially in cylindrical shell, blow by blower fan, when making material through the drip gap, fine grained is just brought cyclone into and is flowed into the fines bucket from end opening, and the dust that is not collected into is got back to and entered next circulation in the blower fan.This machine is good than the centrifugal classifier processing performance, but also has following deficiency:

1, fine powder is reclaimed unonly by the downward air duct of one-level, still has a large amount of repetitive cycling in the blower fan that enter once more.

2, only separate fine powder by dropping system, it is still lower to sort efficient, and it is clean to still have superfine powder about 30% to fail choosing.

3, this machine is difficult to realize the powder that selects of higher fineness.

The purpose of this utility model provides a kind of improved high-efficient powder concentrator device, utilizes the air-flow material to shrink with tangential rotation, separates and multistage collection sorting by classification, reaches the effect of selecting materials efficient, high fineness.

For achieving the above object, technical solution of the present utility model is: the helical disk that has the air-flow feeding mouth along the joint device one of cylindrical shell lower end and cone material-falling hopper, the taper of being made up of the sector system of enclosing is housed on the fistulae at its center roughly selects separator, corresponding with the selected separator of cage that is provided with on the power transmission shaft of cylinder top cover hanging, by lining selected separator and the epicone oral area position of roughly selecting separator are isolated into and roughly select Disengagement zone and selected Disengagement zone, the inlet of radially equally distributed one-level gatherer of the cylindrical shell of selected Disengagement zone and secondary gatherer tangentially is connected in series, and is provided with dust removing tube in the secondary gatherer and is connected with the return air cover conducting that has return air inlet.

Design feature of the present utility model and effect:

1, utilizes the multipass sort structure,, the air-flow material is retracted to centre bore by the helical disk rotation by the tangential direction enter material way of bottom helical disk, the awl mouth that separator is roughly selected in utilization amplifies suddenly, make it a part of coarse fodder and fall, make it another part, and enter selected separator by sorting.Selected separator to adjust different revolutions, can accurately be isolated varigrained particle, and the cyclonic separation gatherer by two-stage series connection is collected fine powder to greatest extent.

2, material enters in the machine from the bottom air intake, makes it quite a few corase particles and directly falls in the hopper, and interparticle interference in the minimizing machine improves one roughing efficient.

3, this machine can be used as ultra-fine screening installation, aligns the revolution of selected separator, and impeller clearance, a blade number average can obtain accurate granularity, is to produce superfine cement to select the indispensable important process link of powder.

4, complete machine structure is reasonable in design, high efficiency, and feeding coal is 7000kg/h, discharging fineness＜80 micron.

Embodiment is further described in conjunction with the accompanying drawings:

Fig. 1 is the structure chart of high-efficient powder concentrator.

Fig. 2 is the helical disk structural representation.

Fig. 3 is for roughly selecting the separator generalized section.

Fig. 4 is selected separator generalized section.

See that Fig. 1 shows the overall structure of high-efficient powder concentrator.Utilization is in the joint of cylindrical shell lower end and thick, the thin material-falling hopper (8,7) of cone, helical disk 9 is housed, structure is seen Fig. 2, on its helical disk 9 tangential, have air-flow material inlet 10, make it that the air-flow material tangentially enters helical disk 9 and rotation is retracted to central hole, the fistulae top, center of central hole is that a taper of being made up of the sector system of enclosing is roughly selected separator 6, and overlapping of each blade is left certain interval a, see Fig. 3, the big I of its gap a is adjusted according to the sorting granularity requirements.The bottom of helical disk 9 is a coarse fodder bucket 8.The motor 1 that cylinder top cover is provided with is by installing a selected separator 5 on the power transmission shaft of shaft coupling hanging connection.Selected separator 5 is formed cage construction by the blade that is provided with that distributes at a certain distance between two circular ring plates, be fixed on the pallet, sees Fig. 4, corresponding to the top of roughly selecting separator 6.When changing motor 1 rotating speed, can control the different granularity of selected separator 5 sortings, and selected separator 5 and the epicone oral area position of roughly selecting separator 6 are isolated into thick, smart Disengagement zone by lining.The last annular distance of selected separator 5 communicates with selected Disengagement zone, and material enters selected Disengagement zone by the gap of blade by last annular distance.The inlet that cylindrical shell in selected Disengagement zone radially is evenly distributed with one-level gatherer 3 and corresponding secondary gatherer 4 tangentially is connected in series.The lower end of secondary gatherer 4 and fines bucket 7 are connected, and are provided with dust removing tube 11 are connected with return air cover 2 conductings of upper end in secondary gatherer 4, have the multistage cyclone separation device that return air inlet 12 is formed on the return air cover 2.

During duty, whole system is worked under negative pressure.After material is sucked by air-flow by feeding mouth 10, make the air-flow material rotate the contraction radius of turn gradually along the tangential direction of helical disk 9, the air-flow material rises when being retracted to central hole location, and a part of bulky grain is fallen in the coarse fodder bucket 8.The air-flow that rises just continues rotation along roughly selecting separator 6 along direction blade, and when each impeller clearance a, because air-flow changes direction, fine grained enters with air-flow and roughly selects in the separator 6, and rotation is risen.The larger particles material is then thrown on the barrel along the blade tangential direction, make it the energy disappearance and fall into hopper along wall, the air-flow of rising part is through selected separator 5 time, subparticle passes through the impeller clearance rapidly, and slightly the bulky grain blade that is subjected to rotation at a high speed impacts and is thrown to the liner barrel and fall in the coarse fodder bucket 8 along the center fistulae of roughly selecting separator 6, by from last annular distance, being selected into selected Disengagement zone with a large amount of microparticles in the air-flow of selected separator 5, fall into fines bucket 7 and enter the one-level gatherer 3 that distributes on the cylindrical shell along the secondary gatherer 4 that tangent line rotates into series connection, the superfine dust that is not collected into is inhaled in the dust removing tube 11, enters deduster by the return air inlet on the return air cover 2 12 and is collected.

Claims

1, high-efficient powder concentrator, comprise that cylindrical shell is along the gatherer that distributes on every side, the bottom taper is thick, fines bucket and cylindrical shell top have motor and constitute, it is characterized in that along cylindrical shell lower end and cone material-falling hopper (7,8) joint device one has the helical disk (9) of air-flow feeding mouth (10), and the fistulae upper end of the heart is equipped with the taper of being made up of the sector system of enclosing and is roughly selected separator (6) therein, corresponding with the selected separator of cage (5) that is provided with on the power transmission shaft of cylinder top cover hanging, by lining selected separator (5) and the epicone oral area position of roughly selecting separator (6) are isolated into and roughly select Disengagement zone and selected Disengagement zone, the radially equally distributed one-level gatherer of the cylindrical shell of selected Disengagement zone (3) tangentially is connected in series with the inlet of secondary gatherer (4), and be provided with dust removing tube (11) in the secondary gatherer (4) and be connected, form multistage cyclone separation device with return air cover (2) conducting that has return air inlet (12).

2, by the described high-efficient powder concentrator of claim 1, it is characterized in that roughly selecting overlapping between each sector of separator (6) and should leave certain interval a, and the adjustable size of gap a.

3,, it is characterized in that the selected separator of cage (5) is by forming between the blade that is provided with by square distribution between certain between two circular ring plates by the described high-efficient powder concentrator of claim 1.

4, by the described high-efficient powder concentrator of claim 1, it is characterized in that the tangential ends setting of air-flow material feeding mouth (10) along helical disk (9).