EP3917689B1 - Screening machine having screening elements arranged in succession - Google Patents

Description

The invention relates to a screening machine with an oscillatingly mounted machine frame that can be set in motion and with screening elements arranged in a row in or on the machine frame, viewed in the longitudinal direction of the screening machine, with the screening machine in its assembled state being larger than the interior of a standard transport container or as limiting dimensions who need a special transport,

Screening machines per se have been known for decades and are in widespread use.

The document DE 85 12 051 U1 for example, shows a screening device with a vibrating support structure, which is supported on springs on the ground and has a vibration exciter. The support structure consists of two side panels connected by first cross members, which primarily perform a circular oscillation, and of second cross members, which are connected to the support structure via springs and which oscillate elliptically or in the longitudinal direction, and between each first and second cross member an elastic screen mat is located. The screening device can be set up at an incline so that a sufficient conveying speed and a corresponding dwell time of the screenings on the screen can be achieved.

The document DE 10 2012 206 347 A1 shows a screening device with a vibrating base frame, which consists of two side walls connected by first cross members, and with an additional frame connected to the base frame via spring elements, which consists of two side beams arranged parallel to the side walls and connected by second cross members is formed, wherein viewed in the longitudinal direction of the screening device alternating first and second crossbeams, flexible screen mats forming a screen surface being clamped between a first and second crossbeam and the additional frame being divided into at least two additional frame sections in the longitudinal direction. It is further provided that the screening device, seen in its longitudinal direction, has at least two screening sections arranged one behind the other with a different orientation relative to the horizontal, that each screening section is assigned its own additional frame section and that each screening section, in addition to the different orientation relative to the horizontal, differs in at least one further screening parameter of differs from the other wire section(s). Here, too, it is a question of a uniform screening machine, in which only screening machine areas with different inclinations are provided.

The document CN 102 500 547 A shows a screen assembly for asphalt mixing plants, comprising a first screen, a second screen, a third screen, a fourth screen and a fifth screen inclined along the horizontal direction, characterized in that the screen openings of the first screen, the second screen , the third screen, the fourth screen and the fifth screen increase in turn and are distributed in three layers and two columns and the third screen is connected to the fifth screen and arranged on the first layer, and the second screen and the fourth screen are arranged on the second layer and there is a space between the two screens and the space is used to pass the screening material of the third screen and the second screen and the first screen is arranged on the third layer and the third screen, the second screen and the first screen in are arranged in the first row and the fifth screen and the fourth screen are arranged in the second row.

The desire for a particularly economical operation of screening machines using large throughputs means that larger screening machines are increasingly being asked for and built. However, the increasing size of screening machines also leads to increasing transport problems. Large screens require the construction of specially adapted, individual wooden and/or metal transport jigs and frames to mount the screens on transport, such as flat rack containers or low loaders. Since this is an open means of transport, the screening machines, especially when transported by sea, must be additionally packed to protect them against harmful external influences. This results in a high level of effort and correspondingly high costs. Theoretically, it would be possible to transport a screening machine completely dismantled into its individual parts, but the problem remains that the screening machine has individual parts that are still so large that specially adapted, individual transport devices would have to be made for them.

The object of the present invention is therefore to create a screening machine of the type mentioned at the outset which avoids the disadvantages of the prior art mentioned and which, in particular, can be transported more easily and cost-effectively.

The object is achieved according to the invention with a screening machine of the type mentioned at the beginning, which is characterized in that the screening machine is divided into several screening machine parts that can be connected or assembled to form the screening machine and that an individual screening machine part or one or more stacks of several screening machine parts stacked on top of one another have dimensions in length, width and height that are smaller than the corresponding dimensions of the interior of a normal standard transport container or as dimensions requiring special transport due to oversize and that the machine frame viewed in the longitudinal direction of the machine frame can be divided into several that can be connected or assembled to form the machine frame Sub-frame is divided that each sub-frame is assigned at least one of the screen elements that each sub-frame own resilient bearing elements are assigned that each sub-frame at least one own Schwingantr ieb is assigned and that a single sub-frame with screen element or one or more stacks of several sub-frames stacked on top of each other with respective screen element have dimensions in length (L), width (W) and height (H) that are smaller than the corresponding ones Dimensions of the interior of a normal standard transport container or as dimensions requiring special transport due to oversize.

The screening machine according to the invention is therefore designed and optimized for transport in box and open-top containers and on common transport vehicles without exceeding the loading gauge. This is achieved by manufacturing the individual screening machine parts with such external dimensions that they can be accommodated individually or in groups in box and open-top containers and on standard transport vehicles without exceeding the loading dimensions. As a result, a significantly reduced outlay for transport and packaging is achieved by eliminating the need for costly individual transport structures made of wood and/or metal. In addition, there is a significantly lower financial outlay for transport, since common standardized box and open-top containers can be sent by truck, rail and ship at lower costs.

The component of a screening machine with the greatest expansion is usually the machine frame of the screening machine, in particular in the form of two side panels. Therefore, in a further embodiment of the invention, it is proposed that the machine frame, viewed in the longitudinal direction of the machine frame, be divided into several subframes that can be connected or assembled to form the machine frame, that each subframe is assigned at least one of the screen elements, and that an individual subframe with screen element or one or more stacks of several partial frames stacked one on top of the other with the respective screen element having dimensions in length, width and height that are smaller than the corresponding dimensions of the interior of a conventional standard transport container or as dimensions requiring special transport due to oversize.

In order to be able to set up the screening machine as quickly and easily as possible at its intended place of use, it is provided that each screening machine part or partial frame is assigned its own resilient bearing elements.

For the same reason, it is preferably provided that each screening machine part or partial frame is assigned at least one dedicated oscillating drive.

Depending on the intended use of the screening machine, the connections between adjacent screening machine parts or partial frames can be rigid or resilient connections.

In order to achieve a compact, in particular as short as possible, arrangement of the screening machine, it is proposed that adjacent screening machine parts or partial frames can be connected or assembled in a proximity to one another that allows direct transfer of screenings without additional transfer means. With such an arrangement, separate screening material transfer chutes between the screening machine parts are also not required.

In order to achieve the safest possible transport of stacked screening machine parts or partial frames of the screening machine, each screening machine part or partial frame preferably has stacking contours on the top and bottom, which interlock in the stack of several screening machine parts or partial frames to prevent a transverse displacement of the screening machine parts or partial frames relative to one another. The stacking contours improve the position security in the container or transport vehicle and make a significant contribution to avoiding damage to the screening machine parts or subframes during transport.

The screening machine according to the invention advantageously allows a favorable modular design, for which purpose all screening machine parts or sub-frames are designed to be identical to one another in the ideal case. The modular design contributes to a particularly economical manufacture and assembly of the screening machine.

In a slightly less extensive form of the modular design of the screening machine, apart from the first and last screening machine parts or subframes viewed in the conveying direction of the screenings, the other screening machine parts or subframes can be identical to one another. This takes account of the fact that, in practice, special configurations or special components often have to be provided at the beginning and at the end of a screening machine.

Specifically, for the screening machine according to the invention, it is finally also provided that an individual screening machine part or a stack of several screening machine parts stacked on top of one another or an individual partial frame with a screening element or a stack of several partial frames stacked on top of one another with a respective screening element has a maximum length of between 2.1 m and 2. 5 m, a maximum width between 2.1 m and 16.0 m and a maximum height between 1.95 m and 2.7 m. The stated length dimensions of 2.1 m correspond to the door opening of a standardized 8-foot container and, at 2.5 m, the maximum load width for road transport without a special permit. The specified width dimensions of 2.1 m correspond to the inner length of a closed, standardized 8-foot container and 16.0 m to the length of a standardized 53-foot container. The height dimensions given correspond to the door height of a standardized closed 8-foot container at 1.95 m and the height of a standardized open-top container at 2.7 m.

Figur 1

einen Teil einer ersten Siebmaschine, in Ansicht schräg von oben,

Figur 2

einen Teil einer zweiten Siebmaschine, in Ansicht schräg von oben,

Figur 3

einen Container mit darin angeordneten, gestapelten Siebmaschinenteilen,

Figur 4

drei Siebmaschinenteile während eines Stapelns übereinander,

Figur 5

einen Stapel aus drei Siebmaschinenteilen in Ansicht auf deren Längsseite und

Figur 6

den Stapel aus Figur 5 mit den drei Siebmaschinenteilen in Ansicht auf deren Stirnseite.

Exemplary embodiments of the invention are explained below with reference to a drawing. The figures of the drawing show:

figure 1

part of a first screening machine, viewed diagonally from above,

figure 2

part of a second screening machine, viewed diagonally from above,

figure 3

a container with stacked screening machine parts arranged in it,

figure 4

three screening machine parts while stacking one on top of the other,

figure 5

a stack of three screening machine parts in view of their long side and

figure 6

the stack figure 5 with the three screening machine parts viewed from the front.

In the following description of the figures, the same parts in the various figures are always provided with the same reference numbers, so that not all reference numbers have to be explained again for each figure.

the Figures 1 and 2 show part of a first and a second screening machine 5 in a view at an angle from above, the screening machine 5 here comprising three screening machine parts 1, 2, 3 arranged in a row. The screening machine parts 1, 2, 3 in the embodiment according to figure 1 gradually falling in the screening material conveying direction 50 and in the exemplary embodiment figure 1 arranged in a common plane.

The exemplary embodiments agree in their further features described below Figure 1 and 2 match.

Each screening machine part 1, 2, 3 has a partial frame 10, 20, 30, which in each case surrounds and supports an associated screening element 15, 25, 35, which is in two parts in this case. A pair of resilient bearing elements 11, 21, 31, which are formed, for example, by steel or elastomeric or air springs, are arranged on the underside on each of two opposite longitudinal sides of the partial frames 10, 20, 30. In the completed state of the screening machine 5, the bearing elements 11, 21, 31 are connected at their lower end to the side walls thereof, which are not shown here for reasons of clarity. If necessary, the side walls are also divided into smaller side wall parts which can be connected to form the complete side walls, e.g. B. by screw connections. The side wall parts can also form a structural unit that is preassembled prior to transport with the screening machine parts 1, 2, 3 or partial frames 10, 20, 30.

Each screening machine part 1, 2, 3 or partial frame 10, 20, 30 is assigned at least one vibratory drive 12, 22, 32, e.g. B. with a rotating unbalanced mass. For reasons of symmetry, an oscillating drive 12, 22, 32 is expediently provided on each longitudinal side of each screening machine part 1, 2, 3, but in Figure 1 and 2 the oscillating drives located on the rear long side are not visible.

Connections between adjacent screening machine parts 1, 2, 3 or partial frames 10, 20, 30 can be designed as rigid or resilient connections. The screening machine parts 1, 2, 3 or sub-frames 10, 20, 30 can also be arranged unconnected to one another, since they are still mounted on the side walls of the screening machine 5, not shown, via the resilient bearing elements 11, 21, 31.

Furthermore, the Figures 1 and 2 that the screening machine parts 1, 2, 3 or sub-frames 10, 20, 30 that are adjacent to one another are connected to one another or put together in a proximity to one another that permits direct transfer of material to be screened without additional transfer means. If there are larger distances between the screening machine parts 1, 2, 3 or partial frames 10, 20, 30, additional screening material transfer chutes can be provided to bridge them.

As described above, a plurality of screening machine parts 1, 2, 3 that can be connected or assembled to form the screening machine 5 are provided. This subdivision is dependent on the size of the screening machine 5, according to the figure 3 made in such a way that a single screening machine part 1, 2, 3 or one or more stacks 4 of several screening machine parts 1, 2, 3 stacked one on top of the other have dimensions in length, width and height that are smaller than the corresponding dimensions of the interior of a usual standard transport container 6 or as a special transport due to oversize dimensions requiring.

In the example after figure 3 are two stacks 4 of three screening machine parts 1, 2, 3 housed in the container 6 for transport.

For the purpose of a non-slip arrangement of the screening machine parts 1, 2, 3 one above the other in the stack 4, as in figure 4 shown enlarged during a stacking process, each screening machine part 1, 2, 3 or partial frame 10, 20, 30 upper and lower side stacking contours 13, 14, 23, 24, 33, 34, which in the stack 4 from several screening machine parts 1, 2, 3 or Partial frames 10, 20, 30 mesh to prevent a transverse displacement of the screening machine parts 1, 2, 3 or partial frames 10, 20, 30 in the stack 4 relative to one another.

Like in particular figure 4 As can be seen, all screening machine parts 1 , 2 , 3 or partial frames 10 , 20 , 30 with screen elements 15 , 25 , 35 are identical to one another, which enables the screening machine 5 to be constructed in a modular manner.

figure 5 shows a stack 4 of three screening machine parts 1, 2, 3 in view of the long side and figure 6 shows the stack 4 out figure 5 with the three screening machine parts 1, 2, 3 in view of the front side. According to figure 5 have the screening machine parts 1, 2, 3 and thus also the stack 4 seen in the longitudinal direction L. According to figure 6 the screening machine parts 1, 2, 3 and thus also the stack 4 have a width B as seen in the front side direction and a height H in the vertical direction. These outer dimensions length L, width B and height H are selected so that they are smaller than the corresponding ones Dimensions of the interior of a standard transport container, such as the in figure 3 container shown 6. Simultaneously or alternatively, the external dimensions length L, width B and height H are selected so that they are smaller than a permit Dimensions requiring special transport due to oversize, which is particularly important for road transport on a truck.

In practice, with regard to the available sizes of standard transport containers and transport vehicles, especially trucks, it has proven to be advantageous if a single screening machine part or one or more stacks of several screening machine parts stacked on top of one another or a single partial frame with a screening element or one or more Stack of several sub-frames stacked on top of each other, each with a screen element, has a maximum length of between 2.1 m and 2.5 m, a maximum width of between 2.1 m and 16.0 m and a maximum height of between 1.95 m and 2.7 m exhibit. <u>List of reference characters:</u> sign designation 1 first vibrating machine part 10 first subframe 11 resilient bearing elements on 1 12 Oscillating drive on 1 13 top stacking contour at 1 14 bottom stacking contour at 1 15 sieve element in 1 2 second vibrating machine part 20 second subframe 21 resilient bearing elements on 2 22 Oscillating drive on 2 23 top stacking contour on 2 24 bottom stacking contour on 2 25 Screen element(s) in 2nd 3 third vibrating machine part 30 third subframe 31 resilient bearing elements on 3 32 Oscillating drive on 3 33 top stacking contour on 3 34 bottom stacking contour at 3 35 Screen element(s) in 3rd 4 stack 5 screening machine 50 conveying direction 6 Container L length of 4 B width of 4 H height of 4

Claims (7)

1. A screening machine (5) having a vibrationally mounted machine frame which can be set into vibration and having screening elements (15, 25, 35) which are arranged in succession when viewed in the longitudinal direction of the screening machine in or on the machine frame, wherein the screening machine in its assembled state is larger than the interior of a standard transport container or than dimensions above which special transport is required,
   wherein

   the screening machine (5) is divided into a plurality of screening machine parts (1, 2, 3) which can be interconnected to form the screening machine or can be assembled,

   to each screening machine part (1, 2, 3) own spring-loaded bearing elements (11, 21, 31) are assigned,

   to each screening machine part (1, 2, 3) at least one own vibratory drive (12, 22, 32) is assigned,

   a single screening machine part (1, 2, 3) or one or more stacks (4) consisting of a plurality of screening machine parts (1, 2, 3) stacked one on top of the other have dimensions in length (L), width (B) and height (H) which are smaller than the corresponding dimensions of the interior of a conventional standard transport container (6) or than dimensions required as special transport due to being oversized; and

   the machine frame viewed in the longitudinal direction of the machine frame is divided into a plurality of sub-frames (10, 20, 30) that can be interconnected to form the machine frame or can be assembled, to each sub-frame (10, 20, 30) at least one of the screening elements (15, 25, 35) is assigned, to each sub-frame (10, 20, 30) own spring-loaded bearing elements (11, 21, 31) are assigned, to each sub-frame (10, 20, 30) at least an own swivel drive (12, 22, 32) is assigned and a single sub-frame (10, 20, 30) having a screening element (15, 25, 35) or one or more stacks (4) of a plurality of sub-frames (10, 20, 30) stacked one on top of the other having a respective screening element (15, 25, 35) having dimensions in length (L), width (B) and height (H) that are smaller than the corresponding dimensions of the interior of a conventional standard transport container (6) or the dimensions required as special transport due to being oversized.
2. The screening machine (5) according to claim 1, characterized in that the connections between adjacent sub-frames (10, 20, 30) are rigid or spring-loaded connections.
3. The screening machine (5) according to claim 1 or 2, characterized in that adjacent sub-frames (10, 20, 30) can be interconnected or can be assembled in a vicinity to each other allowing a direct transfer of screenings without additional transfer means.
4. The screening machine (5) according to one of claims 1 to 3, characterized in that each sub-frame (10, 20, 30) has stack contours (13, 14, 23, 24, 33, 34) on top and bottom, which in the stack (4) of a plurality of sub-frames (10, 20, 30) engage to prevent a transverse displacement of the sub-frames (10, 20, 30) relatively to each other.
5. The screening machine (5) according to one of claims 1 to 4, characterized in that all sub-frames (10, 20, 30) are configured identically among each other.
6. The screening machine (5) according to one of claims 1 to 4, characterized in that except of one first and one last sub-frame (10, 30) viewed in screenings transport direction (50) the other sub-frames (20) are configured identically among each other.
7. The screening machine (5) according to one of claims 1 to 6, characterized in that a single sub-frame (10, 20, 30) having a screening element (15, 25, 35) or one or more stacks (4) of a plurality of sub-frames (10, 20, 30) stacked one on top of the other having a respective screening element (15, 25, 35) have a maximum length (L) between 2.1 m and 2.5 m, a maximum width (B) between 2.1 m and 16.0 m and a maximum height (H) between 1.95 m and 2.7 m.

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