EP3932561B1 - Mobile crushing plant and method for reducing the transport height of a mobile crushing plant - Google Patents

Description

The invention relates to a mobile crushing plant according to the features in the preamble of patent claim 1 and a method for reducing the transport height of a mobile crushing plant according to the features of patent claim 9. Such a device and method is, for example, in US2014158798 disclosed.

Mobile crushing plants, eg impact crushers, are used to crush mineral primary raw materials or to crush mineral recycling materials, which are referred to as secondary raw materials. These raw materials are available as bulk goods and are dosed and fed to a shredder on site. This is usually done via a funnel-shaped feed unit that is fed with a wheel loader, for example. The bulk material is from the Task unit placed on a conveyor belt that transports the bulk material to the shredder.

Mobile shredding systems are transported to the place of use on low-loaders. The shredding systems can be moved automatically over the last few meters to the desired location via their crawler chassis. The mobile crushing plants have a considerable size and a high weight, for example from 25 to 45 t. A maximum transport width of e.g. 3 m should not be exceeded. The transport height should also remain clear and below 4 m, for example in a range of up to 3300 mm.

Certain crushers, particularly reversible impactors, require a symmetrical impact chamber for a consistent result. The material is therefore fed in from vertically above. In the operating position, the feeding of the bulk material requires a conveyor belt, which contributes significantly to the overall height of the mobile shredding plant. This conveyor belt, which transports the material in front of a feeding unit (feeder) to a shredder (crusher), should on the one hand not be a limiting factor with regard to the size of the shredding plant. On the other hand, it must not pose a problem for road transport. Theoretically, it would be possible to partially dismantle a mobile shredding plant before further transport, for example to dismantle such a conveyor belt and transport it separately. However, this increases the assembly effort considerably. The commissioning and shutdown of such a crushing plant is much more time-consuming.

The invention is therefore based on the object of demonstrating a mobile shredding system with a conveyor belt between a feed unit and the shredder, which is as compact as possible for road transport, can be put into operation quickly and can be brought back into transport mode without the conveyor belt having to be removed for this purpose of the crushing plant would have to be separated.

Furthermore, a method for reducing the transport height of a mobile crushing plant will be shown, in which a conveyor belt between the feeder and the crusher is arranged, can be shifted as quickly as possible and with little effort into a position suitable for transport.

The subject matter of the invention is solved in a mobile crushing plant with the features of patent claim 1 . A method that solves this problem is the subject of patent claim 9.

The mobile crushing plant according to the invention has a conveyor belt which is provided for the flow of material from a feed unit to a crusher that follows in the longitudinal direction of the crushing plant and is arranged between the feed unit and the crusher. The conveyor belt has a conveying direction. The conveying direction within the meaning of the invention is the main conveying direction from the feed unit to the shredder, i.e. from the feed end to the discharge end of the conveyor belt. Since said components (loading unit, conveyor belt, shredder) follow one another in the longitudinal direction of the shredding plant, the conveying direction also runs between the two longitudinal sides of the shredding plant. The feed end for the material is located adjacent to the feed unit. The discharge end is in the operating position on the shredder. The conveyor belt can be shifted from an operating position to a transport position.

The conveyor belt is arranged such that it can be pivoted laterally for the shift from the operating position to the transport position. Lateral pivoting refers to pivoting towards the longitudinal sides of the crushing plant. Here, a discharge end of the conveyor belt is pivoted to a first longitudinal side and the opposite task end to the other longitudinal side. As a result, the conveyor belt is pivoted out of the original conveying direction, in particular out of the longitudinal direction of the comminution plant.

Pivoting has the significant advantage that the discharge end is no longer located above a shredding plant. At the same time, the feeding end of the conveyor belt is no longer at or below the feeding unit. This makes it possible to change and, in particular, to reduce the inclination of the conveyor belt. The inclination of the conveyor belt is reduced by that the discharge end is lowered. At the same time, the task end can be raised.

In the transport position, the conveyor belt is in particular transverse to the longitudinal axis of the comminution system or transverse to the direction of travel of the comminution system. In the operating position, the conveyor belt is preferably in the longitudinal direction of the crushing plant and is pivoted by 90°±10° to the operating position in order to reach the transport position. In this sense, the conveyor belt is arranged transversely to the longitudinal axis of the crushing plant in the transport position.

Depending on the orientation of the pivot axis, it may be necessary to lower the discharge end in a separate process step. The discharge end is arranged lower in the transport position than in the operating position. The lowering takes place in particular by means of a carrying device, the carrying device causing the pivoting from the operating position into the transport position and advantageously also the lowering of the conveyor belt. The dropping end should be lowered in such a way that the dropping end is arranged next to the shredder when viewed in the longitudinal direction of the shredder in the transport position.

In particular, the conveyor belt can be pivoted about a vertical axis as the pivot axis of the comminution plant between the operating position and the transport position. A vertical axis is an axis which is perpendicular to the longitudinal direction of the comminution plant and points upwards perpendicular to the longitudinal axis. When the conveyor belt has been rotated 90° around this vertical axis, it can be lowered in the next step.

Alternatively, the pivot axis is not the vertical axis, but is, for example, perpendicular to the conveying surface of the conveyor belt. For example, if the conveyor belt had an incline of 45°, the pivot axis would be perpendicular to the incline surface and accordingly also at an angle of 45° to the horizontal. If the conveyor belt is now pivoted about this inclined pivot axis, the conveyor belt is pivoted in the plane of the conveyor belt. As a result, the higher discharge end within the conveyor belt level pivoted down while the task end is pivoted up. As a result, even with this type of pivoting in the transport position, the conveyor belt is essentially transverse to the comminution plant. The advantage of this embodiment is that a separate lowering can be omitted.

The conveyor belt should not increase the maximum width of the mobile comminution system in the transport position, but should ideally be arranged between the longitudinal sides of the comminution system, which are defined by other components of the comminution system.

Accordingly, a length of the conveyor belt between the discharge end and the feed end, i. H. be the overall length less than or equal to the distance between the longitudinal sides of the crushing plant. As a result, the conveyor belt does not protrude laterally.

The crusher is preferably an impact crusher, in particular a reversing impact crusher for crushing bulk mineral material. The invention is not limited to a specific mode of operation of a shredder. The crusher can therefore also be a non-reversing impact crusher or a jaw crusher. A crusher is mobile if it has a chassis with wheels or tracks or skids on which the crusher can be moved slidably.

The method according to the invention for reducing the transport height of a mobile crushing plant is based in particular on a plant having the features of patent claims 1-8.

The shredding plant has a conveyor belt between a feed unit and a shredder, the conveyor belt being shifted from an operating position to a transport position in order to reduce the transport height. The conveyor belt is pivoted in such a way that a discharge end is moved in the direction of one longitudinal side of the shredding plant and its loading end is pivoted in the opposite direction to the other longitudinal side of the shredding plant, with the discharge end being lowered into the transport position during or after the lateral pivoting. As explained above, the pivoting and Lowering done by means of a single support device which is attached to a frame of the crushing plant. It is not intended to separate the conveyor belt from the shredding plant. The carrying device and the conveyor belt are components of the shredding plant which are firmly connected to the shredding plant and which can be brought into the desired position using suitable actuators of the carrying device.

The pivoting takes place about a pivot axis, which is in particular a vertical axis of the shredding plant, or about a pivot axis which runs at an angle deviating from 90° to the vertical axis of the shredding plant, so that the discharge end is lowered into the transport position by the pivoting. Even if the pivoting axis does not correspond to the vertical axis, it is still possible to combine pivoting and vertical lowering with one another. The decisive factor is that in the transport position the discharge end is no longer the highest point of the shredding system. When shifting into the transport position, the conveyor belt is preferably brought into a horizontal position.

A further measure for reducing the transport height is that after the conveyor belt has been pivoted, the feed unit is also lowered into a transport position. This is possible because the conveyor belt underneath the feed unit has been removed so that the feed unit can be lowered unhindered.

Figur 1

eine mobile Zerkleinerungsanlage in einer Draufsicht in der Betriebsposition;

Figur 2

die Zerkleinerungsanlage der Figur 1 in der Transportposition;

Figur 3

das Förderband der Figur 1 in einer Seitenansicht in einer Betriebsposition;

Figur 4

das Förderband der Figur 3 während des Verlagerns in eine Transportposition;

Figur 5

das Förderband der Figuren 3 und 4 in der Transportposition;

Figur 6

eine weitere Ausführungsform eines Förderbandes in einer Seitenansicht in der Betriebsposition;

Figur 7

das Förderband der Figur 6 in der Transportposition;

Figur 8

ein weiteres Ausführungsbeispiel eines Förderbandes in einer perspektivischen Ansicht;

Figur 9

eine Seitenansicht einer Zerkleinerungsanlage in der Betriebsposition;

Figur 10

die Zerkleinerungsanlage der Figur 9 in der Transportposition und

Figur 11

eine perspektivische Ansicht der Zerkleinerungsanlage der Figur 10 in der Transportposition.

The invention is explained below with reference to exemplary embodiments illustrated in schematic drawings. Show it:

figure 1

a mobile crushing plant in a plan view in the operating position;

figure 2

the crushing plant figure 1 in the transport position;

figure 3

the conveyor belt of figure 1 in a side view in an operating position;

figure 4

the conveyor belt of figure 3 during shifting to a transport position;

figure 5

the conveyor belt of Figures 3 and 4 in the transport position;

figure 6

a further embodiment of a conveyor belt in a side view in the operating position;

figure 7

the conveyor belt of figure 6 in the transport position;

figure 8

another embodiment of a conveyor belt in a perspective view;

figure 9

a side view of a crushing plant in the operating position;

figure 10

the crushing plant figure 9 in the transport position and

figure 11

a perspective view of the crushing plant figure 10 in the transport position.

the figure 1 shows a highly simplified mobile crushing plant 1 in a plan view. The crushing plant 1 is in an operating position. This can be seen from the fact that a conveyor belt 2 is oriented in the direction of a longitudinal axis L1. The conveyor belt 2 is located on top of the comminution plant 1. It is used to receive bulk material in the form of raw material that is to be comminuted from a feed unit 3 and to transport it to a comminutor 4 . The conveyor belt 2 is located between the feed unit 3 and the shredder 4. The feed unit 3 is charged from above in a manner that is not shown in detail. For this purpose, it is funnel-shaped. A conveyor belt 5 transports the raw material in the direction of arrow P1. It falls from above onto the conveyor belt 2. The conveyor belt 2 is arranged to rise in the direction of the arrow P1 and transports the raw material to an inlet opening 6 at the top of the shredder 4.

the figure 1 FIG. 1 also shows a drive 7 for driving the crushing plant 1 and a further conveyor belt 8 for ejecting the crushed material. All Components are on a frame 9 as shown in figure 2 is indicated. The frame 9 is carried by a crawler chassis 10 ( figure 2 ).

The conveyor belt 2 between the feed unit 3 and the shredder 4 has a conveying direction pointing in the direction of the arrow F. From this perspective, the conveying direction F corresponds to the direction of the longitudinal axis L1 of the comminution system 1. The conveying direction F1 is accordingly between the outer longitudinal sides 11, 12 of the comminution system. The longitudinal sides 11, 12 within the meaning of the invention are the outermost side surfaces in the transport position, which limit the maximum transport width. The position of the longitudinal sides is preferably not defined by the end of the conveyor belt 3 in the transport position, but represents a limiting factor for the length of the conveyor belt 2.

the figure 2 shows the same shredding plant in the transport position. The essential difference for the invention is that the conveyor belt 2 has been pivoted through 90°. It was pivoted about the pivot axis S1, which is perpendicular to the longitudinal axis L1 and therefore perpendicular to the plane of the image. A discharge end 13, which was originally located above the inlet opening 6, was pivoted towards the lower longitudinal side 11 in the plane of the drawing, while at the same time a feed end 14 was pivoted out from under the feed unit 3 and was pivoted towards the other longitudinal side 12. The conveyor belt 2 is now transverse to the longitudinal axis L1 of the shredding plant 1. The discharge end 13 and the loading end 14 do not protrude laterally beyond the longitudinal sides 11, 12, so that the transport width B1 was not increased by the pivoting of the conveyor belt 2.

the Figures 3 to 5 show a first embodiment of a conveyor belt 2 in different positions. the figure 3 shows the conveyor belt 2 in the operating position. The shredder 4 is again shown in a highly simplified manner, as is the feed unit 3. The conveying direction F corresponds to the inclination of the conveyor belt 2, which rises in the plane of the image from the feed unit 3 to the shredder 4. The feeding end 14 is below the feeding unit 3. The discharge end 13 is above the shredder 4.

To move the conveyor belt 2 into the transport position, the conveyor belt 2 is first pivoted about the pivot axis S1, ie about the vertical axis. The pivot axis S1 is located between the discharge end 13 and the loading end 14. A carrying device 15 on the conveyor belt 2 has a plurality of arms 16, 17 which are connected on the one hand to the conveyor belt 2 and on the other hand to a base element 18. The arrows P3 and P4 indicate that the arms 16, 17 can be pivoted into a transport position. An actuator 20 is arranged on the base element 18 for this purpose. The base member 18 including the arms 16, 17 and including the conveyor belt 2 is pivoted about the pivot axis S1 in the direction of the arrow P2. After 90° the in figure 4 position shown. In this position, the discharge end 13 of the conveyor belt 2 is still relatively high above the upper edge 19 of the shredder 4. Therefore, the arms 16, 17 are folded in the next step, as indicated by the arrows P3 and P4 in FIG figure 3 have already indicated. As a result, the conveyor belt 2 is lowered. It is oriented horizontally in the transport position. The discharge end 13 is here brought under the upper edge 19 of the shredder 4, so that the overall transport height is reduced. At the same time, the feed unit 3 is also lowered, so that the upper edge 19 of the shredder 4 now limits the maximum transport height of the three components shown. Like the shredder 4 and the feed unit 3 , the base element 18 is fastened to the frame 9 , as indicated below the pivotable base element 18 .

The embodiment of figure 6 shows an alternative embodiment in which the pivot axis S2 does not correspond to the vertical axis of the comminution plant 1, but is essentially perpendicular to the conveying direction according to the arrow F. The conveyor belt 2 should also be pivoted in the direction of the arrow P2 in this embodiment. As a result, the discharge end 13 of the conveyor belt 2 reaches the in figure 7 shown position next to the shredder 4 and next to the task unit 3. At the same time the task end 14 is pivoted upwards. In this embodiment, the conveyor belt 2 is lowered exclusively by pivoting about the pivot axis S2, which protrudes upwards and is in particular perpendicular to the conveying direction F or to the plane of the conveyor belt 2. The pivoting takes place in turn via a base element 18 which this purpose is in turn arranged pivotably relative to the frame 9. This embodiment has the advantage that the arms 16, 17 of the carrying device 15 can be dispensed with, or the mechanism for separately lowering the pivoted conveyor belt 2.

the figure 8 shows a practical exemplary embodiment of such a conveyor belt 2 with its feed end 14 arranged low left in the plane of the drawing and its discharge end 13 . For the purposes of the invention is understood as a conveyor belt 2 not only the circulating webbing, but an arrangement as shown in FIG figure 8 including the corresponding drive units, idlers and the supporting frame construction. Below the conveyor belt 2 is the support device 15, wherein the to the figure 3 introduced reference symbol is used.

The carrying device 15 comprises a plurality of arms 16, 17 of different lengths which are articulated on the one hand on the conveyor belt 2 and on the other hand are attached to a base element 18 which in turn is connected to the frame 9 of the crushing plant 1. The subassembly of the frame denoted here by 9 can also be a subassembly of the conveyor belt arrangement 2, which is coupled to the actually supporting frame of the crushing plant 1. This enables a modular design. The base member 18 may include a rotatable upper plate and a fixed lower plate, with the lower plate being coupled to the frame. An actuator 20, in particular a hydraulic cylinder or a spindle drive, is provided for lowering the conveyor belt 2. A further actuator, not shown in detail, is provided for pivoting the conveyor belt 2 . The pivot axis S1, about which the conveyor belt 2 can be pivoted in the direction of the arrow P2, runs perpendicularly through the base element 18. The pivot axis S1 is located between the loading end 14 and the discharge end 13, so that the two ends point in opposite directions to the longitudinal sides 11 , 12 be moved as in the Figures 1 and 2 is shown.

the Figures 9 and 10 show side views of one and the same crushing plant 1 once in the operating position ( figure 9 ) and once in the transport position ( figure 10 ). The height H1 is the height in the operating position. The height H2 is the height of the transport position ( figure 10 ). It can be seen that the crawler track 10 is located below the shredder 4 . The feed unit 3 is located in the image plane on the right. Accordingly, the conveyor belt 2 is located between the task unit 3 and the shredder 4. In the image plane on the left figure 9 the drive unit 7 and another conveyor belt 8 follow. Below the other conveyor belt 8 is a screening device 21 and a third conveyor belt 22 for receiving the fine grain. Oversized grain is transported back to the feed unit 3 via a fourth conveyor belt 23 . The fourth conveyor belt 23 determines the height H1 in the operating position. In the transport position ( figure 10 ) the fourth conveyor belt 23 for the oversized grain is angled so that it does not protrude over the top of the shredder 4 as the central solid component. It can also be seen that the first conveyor belt 2 is now arranged transversely to the longitudinal direction of the comminution plant 1 and therefore also does not protrude beyond the upper edge 19 of the comminutor 4 . The task unit 3 was also moved to a transport position, ie lowered. Side parts of the hopper arrangement of the feed unit 3 were folded down for this.

the figure 11 showed the same crushing plant 1 as shown in figure 10 is shown, but in a perspective view. The conveyor belt 2, which is located on top of the crushing plant 1, is pivoted by 90° to the longitudinal axis in the illustrated transport position. In this transport position, the overall width of the crushing plant 1 is not increased, nor is the overall height adversely affected. The other reference symbols have the same meaning as in the other figures.

References:

• 1 - crushing plant
• 2 - conveyor belt
• 3 - task unit
• 4 - shredder
• 5 - conveyor belt
• 6 - entrance opening from 4
• 7 - drive unit
• 8 - conveyor belt
• 9 - frame of 1
• 10 - caterpillar undercarriage from 1
• 11 - long side of 1
• 12 - long side of 1
• 13 - ejection end of 2
• 14 - task end of 2
• 15 - carrying device
• 16 - arm of 15
• 17 - arm of 15
• 18 - base element
• 19 - top edge of 4
• 20 - actuator of 15
• 21 - screening device
• 22 - conveyor belt for fine grain
• 23 - conveyor belt for oversize grain
• 24 - hood
• B1 - transport width
• F1 - conveying direction
• H1 - operating altitude
• H2 - transport height
• L1 - longitudinal axis of 1
• P1 - transport direction in 3rd
• P2 - pan direction
• P3 - arrow
• P4 - arrow
• S1 - pivot axis
• S2 - pivot axis

Claims (14)

1. Mobile comminuting plant (1) having a conveyor belt (2) which, for the flow of material from a feed unit (3) to a comminuter (4) which follows in longitudinal direction of the comminuting plant (1), is arranged between the feed unit (3) and the comminutor (4), wherein the conveyor belt (2) has a conveying direction (F) which extends between both longitudinal sides (11, 12) of the comminuting plant (1) and wherein the conveyor belt (2) has a discharge end (13) and a feed end (14) and can be moved from an operating position into a transport position, characterised in that the conveyor belt (2) is arranged so as to be able to be pivoted laterally for the transfer between the operating position and the transport position, wherein in the transport position a discharge end (13) of the conveyor belt (2) points to a first longitudinal side (11) and the feed end points to the other of the longitudinal sides (12).
2. Mobile comminuting plant (1) according to claim 1, characterised in that the conveyor belt (2) is pivoted in the transport position by 90° +/- 10° to the operating position, such that in the transport position the conveyor belt (2) is arranged transversely to a longitudinal axis (L1) of the comminuting plant (1).
3. Mobile comminuting plant (1) according to claim 1 or 2, characterised in that in the transport position the discharge end (13) is arranged at a lower level than in the operating position.
4. Mobile comminuting plant (1) according to any of claims 1 to 3, characterised in that the conveyor belt (2) is connected to the comminuting plant (1) via a supporting device (15), wherein the conveyor belt (2) can be lowered by means of the supporting device (15) from the operating position into the transport position and can be pivoted.
5. Mobile comminuting plant (1) according to any of claims 1 to 4, characterised in that in the operating position the discharge end (13) is located above the comminuter (4) to be loaded, and in the transport position it is located next to the comminuter (4).
6. Mobile comminuting plant (1) according to any of claims 1 to 5, characterised in that the conveyor belt (2) is pivotable about a pivot axis (S1) of the comminuting plant (1) between the operating position and the transport position, wherein the pivot axis (S1) is a vertical axis.
7. Mobile comminuting plant (1) according to any of claims 1 to 6, characterised in that a length of the transport band (5) between discharge end (13) and feed end (14) is less than or equal to the distance (B1) between the longitudinal sides of the comminuting plant (1).
8. Mobile comminuting plant (1) according to any of claims 1 to 5, characterised in that the comminuter (4) is a non-reversing or a reversing impact crusher for comminuting a mineral dry bulk.
9. Method for reducing a transport height of a mobile comminuting plant (1), particularly having the characteristics of claims 1 to 8, wherein the comminuting plant (1) has a conveyor belt (2) between a feed unit (3) and a comminuter (4), wherein, for reducing the transport height (H2), the conveyor belt (2) is transferred from an operating position into a transport position, characterised in that the conveyor belt (2) is pivoted such that its discharge end (13) is moved in the direction of a longitudinal side (11) of the comminuting plant (1) and its feed end (14) is moved in the opposite direction towards the other longitudinal side (12) of the comminuting plant (1) and wherein the discharge end (13) is lowered during or after the lateral pivoting into the transport position.
10. Method according to claim 9, characterised in that the pivoting and lowering is carried out by means of one single support device (15) which is fastened to the frame of the comminuting plant (1)
11. Method according to claim 9 or 10, characterised in that the pivoting takes place about a pivot axis (S1) which is a vertical axis of the comminuting plant (1).
12. Method according to claim 9, characterised in that the pivoting takes place about a pivot axis (S2) which stands at an angle to the vertical axis of the comminuting plant (1), such that the discharge end (13) is lowered by the pivoting into the transport position.
13. Method according to any of claims 9 to 12, characterised in that, during the transfer into the transport position, the conveyor belt (2) is brought into a horizontal position.
14. Method according to any of claims 9 to 13, characterised in that the feed unit (3) is lowered into a transport position after the pivoting of the conveyor belt (2).

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