CN1086746A

CN1086746A - Sieve

Info

Publication number: CN1086746A
Application number: CN93119493A
Authority: CN
Inventors: 皮特里·梅多
Original assignee: Roxon Oy
Current assignee: Roxon Oy
Priority date: 1992-10-26
Filing date: 1993-10-26
Publication date: 1994-05-18
Also published as: EP0665773B1; AU683228B2; WO1994009917A1; AU5178893A; FI93803B; EP0665773A1; FI93803C; ATE184514T1; FI924854A0; ZA928646B; DE69326476T2; FI924854A; DE69326476D1

Abstract

The present invention relates to a kind of sieve with many rotatable parts, the horizontal alternate setting of direct of travel of the relative desire screening of sieve part material, this sieve is used for the meticulous screening of material.According to the present invention, the cross section of described screening (3,21,31,32) is to be formed by circle variation basically, so that be that sieve (2,20) is gone up desire and sieved material perpendicular and component motion level are provided.Sieve part (3,21,31,32) is set mutually, thereby in whole screening branch process, can keeps identical size by two adjacent sieve spares (3,21,31,32) formed sieve apertures (11,27).

Description

Sieve

The present invention relates to a kind of meticulous screening solid material, such as the sieve of building stones and coal, this sieve has many continuous, rotating sieve spares, these sieve part suitably alternate settings on the material direct of travel.

Many material handling processes all require to remove from material when handling for example the thickest and the thinnest particle, and in this case, the granularity of described material is between two dimension limits basically.Therefore can obtain to be essentially this material of desired particle size.Developed already and several different sieves in order to the favourable granularity of the paired subsequent treatment operation of material screening.Normally make this class sieve be in obliquity, thereby make the material of desire screening under the gravity effect, pass sieve, or make the sieve vibration, so that move on the material sieve.Described in Finnish patent FI56131, also have rotary screen, this sieve is made of several rotating horizontal cylinders.Utilize these cylinders, can make material pass sieve.In addition, cylinder sieve described in the Finnish patent 56131 is adjustable, promptly in order to adjust overflow, in the distance that increases on the direction that material is advanced between the cylinder, thereby make all particles that form overflow all greater than those particles of having been gone out by branch, and it is sent back to so that make the ball shape.Rotatable drum among the Finnish patent FI56131 only makes material be sized and along continuous straight runs motion basically, and material is on the cylinder top or roll or slip like this.So in processing procedure, be favourable and generally just do not had by moving both vertically of vibrator generation for screening.

The objective of the invention is to eliminate the defective of above-mentioned prior art, and a kind of in use more reliable improved sieve is provided, is the component motion that the material of desire screening provides perpendicular with the sieve spare of suitable form wherein.Of the present invention is that new feature will clearly be represented in appended claims basically.

According to the present invention, this sieve has many along material direct of travel horizontally set, alternate aptly layout and rotating sieve spare.Cross sections of these sieve parts are formed by circle variation basically, but 50% of the cross section contour are forniciform form at least.In addition, relative its rotation of described sieve spare is symmetrical basically.In addition, it is right that the sieve part is in, thereby the distance between the continuous sieve spare is consistent substantially.

The cross section of the sieve spare of the present invention that utilization is formed by circle variation promptly can be the material of delivering to by sieve two kinds of different component motions is provided, promptly a kind of perpendicular and a kind of substantially horizontal component motion.Utilize this two kinds of component motions, can in different steps, change the direction that is positioned at the material on the sieve.For example, elongated material is can not be sized out in the motion of level having only a kind of basically, and utilizes the alternate motion that is produced by the sieve part to be sized out now, and this alternating movement has improved the screening efficiency of sieve of the present invention.

The sieve spare cross section of sieve of the present invention can be the shape that is essentially oval, and the entire cross section contour of so described sieve spare is crooked.The cross section of sieve part also can be a circle, excises with the above-mentioned circular portion of the basic big young pathbreaker who equates at the position of relatively described sieve spare rotation symmetry, and the quantity of cut part is advisable with 2 or 3.So at least, 50% of section girth is crooked and is made up of circular curve.

According to the present invention, with a kind of mutual advantageous forms described sieve spare is set, thereby makes rotating relatively mutually of two continuous sieve spares be essentially 90 ° angle.Therefore, for example when the cross section of sieve part was ellipse, each second sieve part was horizontal basically, and each second sieve part is in vertical position basically.When advancing on the sieve spare surface of material at sieve, owing to making particle form one, the effect of described sieve spare is essentially the motion of rising or descending, thereby make level and vertical two kinds of component motions influence the material of desire screening, and be contained within independent particle wherein.

The sieve spare of sieve of the present invention also can so further be set, though the sieve aperture between two continuous sieve spares laterally running through sieve all at interval on equal and opposite in direction.In addition, make two continuous sieve spares synchronous by a driving member, thereby owing to the symmetrical basically identical that in whole screening process, keeps sieve aperture that makes of the suitable cross section of sieve part.

Sieve of the present invention is significant for the meticulous screening of desire screening thing, and sieve aperture is advisable with the size of 4-25mm in meticulous screening.

When needs sieve into several granularity with material, the sieve of two or more different sieve apertures can be linked up, thereby form a sieve rail that constitutes by several sieves.These sieves can and be identical or driven by several different drive units with one.

Describe the present invention with reference to all accompanying drawings below, wherein:

Fig. 1 represents the side elevation in partial section of the preferred embodiment of the present invention;

The vertical view that the sieve spare of preferred embodiment connects in Fig. 2 presentation graphs 1;

Fig. 3 represents the local side view cutaway drawing of another preferred embodiment of the present invention;

The vertical view that the sieve spare of preferred embodiment connects in Fig. 4 presentation graphs 3;

Fig. 5 represents that further the present invention sieves a useful cutaway view of part;

Represent further among Fig. 6 that the present invention sieves a useful cutaway view of part.

According to Fig. 1 and 2, the material that is shipped by travelling belt drops on the sieve 2.On sieve 2, be provided with sieve part 3 along the direction of advancing transverse to material, sieve part 3 is according to the alternate setting of sieve aperture 11 determined distances.The cross section of sieve part 3 is oval basically, and so arrange sieve part 3: make each second sieve part 3 be in vertical position and make each second sieve part 3 to be horizontal basically basically, even the major axis of the sieve spare of the ovalize that is arranged alternately is in vertical position or horizontal level successively.Thereby with the sieve part 3 interconnect in the sieve part 3 the end (see figure 2) by intermediate gearing 4 sprocket wheel 5 is set.Through mediate roller chain 6 each sprocket wheel is coupled together again.Roller chain 6 is driven by drive unit 7 and rotates.Downstream at sieve 2 is provided with a funnel 8 under sieve 2, make the thin material that leaks down from sieve continue to fall on the downstream travelling belt 9 that is located under the funnel 8 through this funnel 8.Be the overflow of sieve, be provided with travelling belt 10 in the sieve end along the material direct of travel.

When using sieve 2 of the present invention, from the belt 1 of conveyer, the material of desire screening is delivered on the sieve 2.Make 3 rotations of sieve part with drive unit 7, two sieve aperture 11 basic maintenances between the sieve part 3 are equated.Sieve spare 3 convey materials perpendicular and level advance it screenedly on sieve, and make material obtain the component motion of vertical and level.Screening effeciency is improved.Thin material on the sieve 2 drops down onto the travelling belt 9 that funnel also arrives the sieve downstream thus between the sieve part 3.The partial material that does not drop down onto the downstream continues to move ahead and arrives overflow place of sieve 2, arrives travelling belt 10 more thus.

In Fig. 3 and 4, according to the interval of sieve aperture 27 decisions alternate layout sieve part 21.For making 21 actions of sieve part, install a sprocket wheel 23 by intermediate gearing 22 in the end of each sieve part 21.With roller chain 24 these sprocket wheels 23 are interconnected.Described roller chain 24 is walked around an ad hoc roller 25 that returns again.With reference to the accompanying drawings, the drive unit 26 with sieve 20 links to each other with the described roller 25 that returns.With regard to regard to the processing of material, Fig. 3 and 4 sieve are corresponding with the above preferred embodiment shown in Fig. 1 and 2 basically.

In Fig. 5, the cross section of sieve part 31 partly is made of with two sections parallel lines that are connected usefulness two relative circular curves.According to the present invention,, thereby described parallel lines part on sieve part 31 cross sections alternately is in or the position or the substantially horizontal position of perpendicular with the 31 mutual favourable settings of two adjacent sieve spares.

Be preferably formed as the shape of cross section of sieve spare shown in Figure 6 32, promptly on a circular cross section, excise three parts symmetrically with respect to the rotating shaft of sieve part 32.Like this, this cross section is made up of camber line and straight line portion, and the ratio of camber line part is 50% of entire cross section contour at least.

Though described several preferred embodiments in the superincumbent explanation, obviously can within the scope of appended claims of the present invention, make improvement to the present invention to a great extent.Similarly, for example the position of the drive unit of sieve can change in different application.Can handle this drive unit with special transmission device, or described drive unit received on some known sprocket wheel, also can allow each sieve part obtain its rotatory force from a power transmission shaft, above-mentioned axle extends along a side of described sieve spare, and by sprocket transmission device above-mentioned axle is linked to each other with the sieve part.In addition, the cross section of sieve part also can change within appended all claim scopes.

Claims

1, the sieve that has many rotatable sieve spares, each sieves the direct of travel horizontal alternate setting of part with respect to desire screening material, described sieve is used for the meticulous screening of material, it is characterized in that sieve part (3,21,31,32) cross section is essentially circular variation, so that desire screening material on sieve (2,20) is obtained be basically vertical and component motion level; And will sieve part (3,21,31,32) is arranged to use two formed sieve apertures of adjacent sieve spare (11,27) to keep same size basically mutually in whole screening process.

2, sieve as claimed in claim 1 is characterized in that, 50% of at least described sieve spare (3,21,31,32) section girth is circular.

3, sieve as claimed in claim 1 or 2 is characterized in that, the cross section of described sieve spare (3,21,31,32) is basic symmetry to its rotation mutually.

As the described sieve of claim 1,2 or 3, it is characterized in that 4, the cross section of described sieve spare (3,21) is oval basically.

As claim 2 or 3 described sieves, it is characterized in that 5, two of the cross sections of described sieve spare (31,32) partly are made up of corresponding at least circular curve and two parallel lines that above-mentioned circular curve is linked together at least.

6, the described sieve of one of claim as described above is characterized in that two adjacent sieve spares (3,21,31,32) are arranged to relative half-twist angle basically.

7, the described sieve of one of claim as described above is characterized in that, in order to rotate described sieve spare (3,21,31,32), uses a chain (6,24) that described sieve spare (3,21,31,32) is interconnected at least.

8, the described sieve of one of claim as described above is characterized in that, in order to rotate described sieve spare (3,21,31,32), connects two adjacent sieve spares (3,21,31,32) with a chain (6).