DE2443925C3 - Vibrating sieve - Google Patents

Description

The invention relates to a vibrating screen with a Feeding device, a discharge device and a working element, which are supported by steamers of the frame is mounted, receives a Schwingbcwegung from a vibrator and in the direction of the discharge device is inclined and can, for example, in mining / by classifying lumpy natural resources Fun such a vibrating sieve is, for example, from the SU Inventor Schcin 70792 known,

The Vibfäliönssiebs work office ordered out a box with in ίΐιίΐϊ across its entire width; üilct in particular! Fixed distance from each other. stiff metal rods. The Siebkasien is on the Frame or directly on the foundation via Da'tiip ^ fcf, which are made up of Sehratibeflp or leaf springs Placed on supports. An unbalance vibrator is placed on the sieve box, which is driven by a V-belt is set in motion by an electric motor. The unbalance vibrator gives the box a circular swinging motion.

The presence of stiff and heavy grate bars in the box, of supports on which they are placed Grate bars are attached, and an unbalance vibrator is the reason for the heavy weight of the back and swinging sieve parts and consequently for the creation of large dynamic loads, which are soft transferred to the damper and the foundation. To prevent the destruction of the carrier, on If the sieves are to be placed on, foundations with large mass and significant dimensions must be found be built, which is associated with significant capital expenditure.

In addition, when classifying a good it is necessary to use fractions of a certain good from this good To separate grain class. With the existing vibratory skills it is impossible to regulate the distance between the grate bars. If this is necessary, the whole work organ must be replaced, which with great loss of time and consequently is also associated with additional material costs.

From DE-OS 2 029 025 a device for conveying material is known, in which the inclined conveyor trough which can be set in reciprocating movements consists of two walls movable relative to one another, the gap required thereby being sealed by special measures. This device can only be used for transport, but not for classification.

It is the aim of the present invention to do the mentioned Eliminate disadvantages.

The present invention is based on the object to provide a vibrating screen that as a result The work organ has a simple construction and a low weight and is reliable and high-performance.

According to the invention, this object is achieved in that the working element consists of at least one pair consists of one-piece and hole-free sheets that lie on the Auflagci n that the sheets together an angle and its lower lying in the same depth Form a gap for the sieve fractions to pass through.

The execution of the working organ in the form of two one-piece and hole-free sheets makes it possible. reduce the weight of the working organ and, accordingly, the screen mass / u swinging back and forth, since only these sheets participate in the swinging movement, which in turn reduces the power consumption of the Electric motor of the vibrator can be reduced.

As a result of the reduction in the reciprocating mass of the screen, the dynamic loads lower by which the steamers are stressed, and as a result · the Construction of this steamer can be simplified and it becomes possible - on special foundations or substructures to renounce with great mass. In addition, through the use of vöii is one-part And Loch ^ free sheet metal as a work organization its simple grain construction and its operational reliability. The smooth surface of the one-piece and perforated BIeehe and their position at an angle to each other

favor a fast advance of the goods them and guarantee that all of the material to be classified gets into the gap between the sheets, whereby a high separation factor when classifying a good into fractions and an increased workload performance can be ensured.

A preferred embodiment of the invention is that the width of the gap in the direction the inclination of the working organ increases.

Such an arrangement of the sheets enables "> it is to divide the goods to be classified into several fractions with different grain sizes, without the reciprocating masses and to enlarge the screen dimensions.

Another advantageous embodiment of the invention tion is that the sheets can be pivoted to change the angle between the sheets.

This makes it possible to divide the material into several fractions without the sieve dimensions to be enlarged in the ground plan with the reduction of the to-and-fro swaying surface.

Another preferred embodiment of the invention is that among the pair of one-piece and perforated sheets, additional pairs with sheets are arranged, with the sheets in each sheet pair - '"> are arranged at an angle to each other and at such a distance from each other that between at their lower edges there is a gap the width of which is less than for each underlying pair the gap width of the previous pair is, while «ι the column of all pairs and a continuous and tapered passage for from top to bottom form the advance of the good along this passage.

This makes it possible to divide the goods into several η To subdivide fractions without the dimensions of the vibrating sieve while reducing the reciprocating To enlarge sieve masses.

Another advantageous embodiment of the invention consists in the fact that the undersides of the metal sheets and the supports are provided with stops, the stops of the plates with the stops of the Cooperate support.

Such a sheet metal arrangement on the support enables the construction of the working element η much easier to simplify and quick replacement to enable the metal sheets by others without taking apart the whole vibrating sieve, which significantly extends its service life. in

The vibrating screen according to the invention has a simple construction, light weight and relatively small dimensions, is reliable in operation and has high performance. The construction of the working member of this screen makes it possible to change the currency Spaltbreitc y, rend the Siebbetriebs with a minimum of time. In addition, the vibration sieve according to the invention does not require any special foundations and can be used to the greatest extent possible: wi

- for the mechanical classification of ores both in surface and in underground use,

- to separate a large piece of poor pain · « fraction) in order to increase the ore quality in this way, <, 5

- for classifying quarried stones for building · purposes related to their size,

- for the elimination of pollutants during dismantling

of soap deposits,

- for preparing lime for burning,

- for preparing ores for smelting,

- for separating small ore fractions before transporting ore for crushing,

- for sorting vegetables and fruits according to their size.

In the following, the invention is illustrated by describing an embodiment of the vibrating screen below Reference to the drawings explained; it shows

Fig. 1 in a schematic representation, viewed from the side, the overall view of the invention Vibrating sieve,

Fig. 2 is the front view of the vibrating screen shown in Fig. 1,

3 shows the shape of the gap and of the one-piece and hole-free sheets of the working element according to the invention,

Fig. 4 another variant of the shape of the gap ' and the sheets,

5 shows another variant of the shape of the gap and the sheets,

6 shows another variant of the shape of the gap and the sheets,

Fif ". 7 one of the arrangement variants of the one-piece and perforated sheets in the sieve working unit and

8 shows another arrangement variant of the one-piece and perforated sheets in the working organ.

The vibrating sieve has a frame 1 (FIG. 1) on which a feeding device 2 for the goods to be classified, a device 3 / for conveying the classified goods and a working element 4 are mounted, the latter being placed on supports 5 of the frame 1 and is inclined in relation to the conveyor 3 by an angle u = 5-25 °.

The feeding device 2 for the goods to be classified consists of a bunker with an unloading opening, under which the working organ 4 is located, which is used to subdivide the goods to be classified into Fractions and to move the same / ur Ford Teinrichtung 3 is intended.

The working member 4 consists of two one-piece and hole-free sheets 6, which are made of metal, plastic or other materials, have a smooth surface and the length of which is significantly greater than its width. The metal sheets 6 are arranged at an angle β (FIG. 2) to one another. This angle is chosen in the range from 90 to 1iHO 'depending on the physical-mechanical properties of the material to be classified. The sheets are at such a distance from one another that between the edges 7 of these sheets 6 there is a gap 8 for the passage through it of the piner fraction of the material to be classified lower edges 7 are at one level and that the width I) (Fig. 3) of the gap 8 between the metal sheets 6 remains unchanged over its entire length.

To gasify the passage cross-sectional area of the gap 8, the edges la (FIG. 4) of the gap in the metal sheets 6 are cut off in a wave-like manner.

In addition, to divide the goods into several fractions, the sheets 6 can be arranged relative to one another in such a way that the width of the gap 8 (FIG. 5) increases in the direction of the movement of the goods on the sheets, the direction of movement in the figure being indicated by an arrow A is marked. Here, the width of the gap 8 grows from D ₁ to D ₂ equal *

idle along the entire length of the gap or it grows in steps, as can be seen from FIG. The step-widening gap 8 is obtained by cutting off the edges 1b of the metal sheets 6 in a step-like manner.

The sheets 6 (Fig. 2) lie loosely on the supports 5 and are moving on them through interacting stops 9 and 10 prevented. Here are the stops 9 on the bottom of each sheet 6, while the stops

10 are attached to the support 5.

On the underside of each sheet 6 is a vibrator

11 attached to this plate a Schwingbcwegung to be issued, by which the material to be classified is divided into fractions and these on the sheet metal surface to the gap 8 of the Bcfördei ungseinrichtung 3 moved will.

As a vibrator 11 is any, to generate

Cii'iui Sul'ivvii'igiicwcgLii'ij; gcOigiicici, well-known vibrator, for example an electromechanical, electromagnetic, pneumatic or hydraulic Vibrator used.

[• s are to the dynamic loads which arise when the metal sheets 6 vibrate reduce, between the support 5 and the metal sheets 6 dampers 12 inserted, which are made of rubber inserts exist. The dampers 12 are arranged between the stops 9 and 10. Therefore the Interaction of the stops 9 and 10 via the damper 12. In this way it is prevented that the sheets and dampers move along the support 5 and that the oscillating movement on the Support S and the frame 1 is transferred.

In order to be able to increase the feed speed of the material along the sheets 6 in the direction of the gap 8, the sheets 6 are arranged on the supports 5 in such a way that they can be pivoted in the vertical plane to change the angle β between them. For this purpose there is one of the supports 5 or both supports 5 consist of two parts 13 and 14 which are connected to one another by a joint 15. Here, the sheets 6 are arranged on the parts 13, which through the damper

12 and the stops 9 and 10 are prevented from shifting on these parts, while the parts 14 rest on the frame 1.

Each of the parts 13 has a sector 16 with openings 17 which are arranged one below the other, while each of the parts 14 has a support 18 with a bolt 19 inserted into its opening, which at the same time sits in a dftx opening 17 of the sector 16. When changing the angle β between the metal sheets 6, the bolt 19 must be pulled out of the openings in the sector 16 and the support 18. Then the part 13 of the support 5 must be pivoted about the joint 15 relative to the part 14 and held in the new position by inserting the bolt 19 into the opening of the support 18, which coincides with another opening 17 of the sector 16 v / 'nd.

The metal sheets 6 are arranged on the support 5 in such a way that the distance between the edges 7 the sheets 6 can be adjusted, d. H. that the width of the gap can be changed. To this Purpose, the part 14 of the support is provided with a spindle 20, which is guided through a threaded hole is. which is carried out in a projection 21 of the frame 1. By rotating the spindle 20, the part 14 shifted in the frame, in this way the distance /. Between the lower edges 7, i.e. H. the Width of the gap 8 between the sheets 6 is changed.

The working organization of the vibration sieve shown in FIG. 2 contains a pair 22 of the one-piece and hole-free sheets 6,

In order to reduce the dimensions of the vibration sieve in the longitudinal direction *, its working element 4 (Fig. 7 and 8) has, in addition to the pair 22 of one-piece and perforated sheets 6, additional pairs 23 of one-piece and perforated sheets arranged below and parallel to this (ta, the analogous the metal sheets 6. In each of the pairs 23, the metal sheets 6a are arranged at an angle to one another and at a distance from one another, so that gaps 25 are created between their lower edges 24.

Here, each sheet (ta of the following, ie lower lying pair 23, has a width D ₁ , which

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Sheet 6 of the previous, (I h overlying pair 23 or 22 is.

The sheets 6a of the pairs 23 are arranged in such a way that the lower edges 24 of each subsequent pair are closer to one another than the sheet metal edges of the preceding pair, so that the width D _{s of} the gap 25 of each subsequent pair is less than the width D _{6 of} the gap 25 of the previous pair 23 and 22 respectively. Here! Ei through the gap 25 of the pairs 23 and the gap 8 of the pair 22, a continuous passage 26, tapering from top to bottom, is formed in which the material moves downwards, with fractions corresponding to their gap size being deposited on the pairs 23.

To attach the sheets 6 and 6a of the pair 22 and the pairs 23, the supports 5 are designed in the form of jaws. Each jaw or one of them is, as can be seen from FIGS. 7 and 8, hinged at one end to a cantilever arm 27 inserted into the frame 1, while its other end is connected to the frame via a spring 28 and a spindle 29 1 is connected. The spindle 29 is guided through the spring 28 and an opening provided in the frame 1. A nut 30 is screwed onto the spindle 29. By moving the nut 30 along the spindle 29, the jaw is rotated in a joint 31, whereby the angle β between the metal sheets arranged in pairs and the distance between the edges 24 of the metal sheets 6a is changed, ie the width of the gaps 25 and correspondingly the width of the top-to-bottom passage 26 is changed.

The cantilever arm 27 is attached to the frame 1 in such a way that it can be displaced in the horizontal plane, the angle β between the metal sheets of the pairs 23 and the gap width also being changed. For this purpose, the frame 1 is provided with a hollow pin 32 in which the cantilever arm 27 is located. In the hollow pin 32 and in the cantilever arm 27, bores 33 are provided, into which a bolt 34 is inserted in order to hold the cantilever arm 27 in this hollow pin.

To change the angle β and the width of the column 25, the cantilever arm 27 is moved in the hollow pin 32. The bolt 34 is inserted into the hollow pin bore 33 which coincides with another bore in the cantilever arm 27.

On each jaw, compartments 35 are attached, on which the sheets 6 and da of the pair 22 and respectively

of the pairs 23 lie.

The Fäch'Or 35 are on top of each other on the jaws with one after the other, from top to bottom, diminishing Attached here are the sheets 6 and 6a, as can be seen from Fig. 3-6, a Fvrrri.diesich in the direction of movement of the goods on the Sheet metal tapered.

The metal sheets 6 and 6a can be attached to the compartments 35 according to two variants.

In one variant, the sheets ft (Fig. 7) and 6a are loosely placed on the compartments 35, and the shifting of the same on the compartments is carried out by stops 36 attached to the compartments 35 and by stops 37 on the underside of the sheets 6 and 6a are prevented. The stops 36 and 37 are executed analogously to the stoppers 9 and 10 and between them there are dampers 12 on each sheet ha is the same as on the plates 6 a vibrator 11 is attached.

According to another variant, the sheets 6 and 6a (FIG. 8) are hcfestigt directly on the compartments 35. Here, in order to transmit an oscillating movement to the metal sheets 6 and 6a, on each jaw, i. H. a vibrator 11 is attached to each support 5. To reduce the dynamic loads that occur when working the vibrators 11 arise, each jaw rests with its upper and lower end in the form of Foot pieces executed dampers 38, one on the frame 1 and the other on the cantilever arm 27 is located.

To change the width of the gap 25, one of the jaws is provided with a spindle 39 which is guided by a provided in the frame opening is performed. The jaw is opened by turning one on the spindle 39 seated mother 40 moved.

The obtained fractions of classified material are removed by the conveying device 3 (FIG. 1), which consists of a conveyor 41 and an inclined chute 42. The conveyor 41 is under the gap 8 of the working organ 4 or under the ti: jιu1rι <% £

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Shift from the upper edges 44 (Fig. 2) of the Sheet metal 6 to the lower edges 7 to begin with. At the same time, the valid is on these sheets and along these plates are shifted in their direction of inclination to the loading direction 3. Under the influence the back and forth swinging sheets 6 shifts the goods with different grain or piece size in the direction of the gap 8, and fractions of the property, - which contain pieces, whose

Measurements smaller than the width of the gap 8 fall through the gap 8 and arrive at the conveyor 41. Fractions of the goods to be classified, which Contain pieces, the dimensions of which are larger than the width of the gap 8, shift on the BIe-

Ii chen 6 along the same and fall on the inclined one Slide 42 (FIG. 1) of the device 3 for conveying the classified material.

If a certain fraction has to be eliminated from the goods to be classified, that is

. '(i change width of gap 8. This is done on top by turning the spindle 20.

It must if the physical-mechanical

Change properties (increase or decrease of admixtures of sticky material, moisture content, bulk density, etc.) of the material to be classified in order to improve the process flow when dividing the material into fractions, the angle β between the sheets 6 (FIG. 2) can be changed. This is done in the manner described above

in pivoting the part 13 with respect to the part 14 and holding the former in the new position with the aid of the bolt 19.

The mode of operation of the vibrating sieve shown in Fig. 7, 8 is basically analogous to the working

j-> as the screen shown in Fig. 1, 2. The difference is only that the falling through the gap 8 fractions of the material on sheets 6a of the additional Pairs 23 arrive, on which the good that has fallen on them is divided into finer fractions, the width correspond to column 25, is divided. Here

orderly (the conveyor is not shown in FIGS. 7 and 8), while the chute 42 is in the vicinity of the end face 43 of the metal sheets 6 is arranged.

In the variants in which the working element 4, in addition to metal sheets 6, also contains pairs 23 of metal sheets 6a, is the number of inclined slides 42 equal to the number of pairs 22 and 23, the Slides in the vicinity of these pairs, as shown in Fig. 1, are arranged.

The vibrating sieve described here works as follows. The goods to be classified come out of the device; 2 on aeie ^r sheets of the Siebarbeitsörgans 4. After the vibrators 11 have been switched on, the sheets 6 perform an oscillating movement by which the goods to be classified are caused to move their verchen 6a and lengthways the same move, with the help of the chutes 42, which are set up in the vicinity of each pair 23, removed.

In this way, the goods to be classified pass with gradually decreasing piece or Grain size from top to bottom through passage 26. The number of fractions of the to classifying material corresponds to the total number of sheet metal pairs of the sieve plus one.

If the grain classes of the material to be classified have to be changed, a setting regulation is used carried out by the width of column 8 and 25 either by moving the cantilever arm 27 and the nut 30 or 40 at the same time or by moving it to change only one of the mentioned parts.

For this purpose 4 sheets of drawings

Claims (5)

Patent claims: 1. Vibration sieve with a feed device, a discharge device and a working element which is mounted via dampers on supports of the frame, receives an oscillating movement from a vibrator and is inclined in the direction of the discharge device, characterized in that the working element (14) consists of at least one pair (22) consists of one-piece and hole-free sheets (6) which lie on the supports (S) in such a way that the sheets (6) form an angle (/ J) with one another and their lower edges (7), which are at the same height, form a gap (8 ) for the passage of the sieve fractions. 2. Vibration screen according to claim 1, characterized in that the width of the gap (8) in The direction of the inclination of the working organ (4) increases. 3. Vibraiiünssäeb according to claim 2, characterized characterized in that the plates can be pivoted to change the angle (/ J) between the plates (6) are. 4. Vibration sieve according to claim 1, characterized in that under the pair (22) of the one-piece and Icohfrei plates (6) additional pairs (23) with plates (6a) are arranged, the plates (6a) in each plate pair (23) are arranged at an angle to one another and at such a distance that between their lower edges (24) there is a gap (25), the width of which in each underlying pair is less than the width of the gap in the preceding pair, while ax column ( 25) of all pairs (22 and 23) form a tapering passage (26) which is continuous from top to bottom for the advancement of the material along this passage. 5. Vibration sieve according to one of claims I -4, characterized in that undersides the sheets (6, 6a) and the supports (5) with stops (9, 37) and (10, 36) are given away, The stops (9, 37) of the metal sheets (6, 6a) interact with the stops (10. 37) of the supports (5).