Rock processing plant

Abstract

The invention relates to a rock processing plant (10) having a machine frame (13), which supports a screening unit (20), wherein the screening unit (20) has at least two screen decks (21, 22), which are arranged offset from each other in the vertical direction (H) of the rock processing plant (10), wherein the screen decks (21, 22) each have a discharge area (A1, A2), wherein a transport device (15) is connected to the screening unit (22) in the conveying direction, wherein the transport device (15) has a feed area (15.1) and a discharge area (15.2), wherein a transport means, in particular an endless circulating conveyor belt (15.3), extends in a transport direction (D) at least partially between the feed area (15.1) and the discharge area (15.2), wherein the transport device (15) is attached to the machine frame (13) by means of a mechanical actuator (31), wherein the mechanical actuator (31) can be used to move the feed area (15.1) of the transport device (15) between two control positions, in which the feed area (15.1) is optionally assigned to one of the discharge areas (A1, A2) of the two screen decks (21, 22) or both discharge areas (A1, A2), and wherein the mechanical actuator (31) can be used to move the feed area (15.1) of the transport device (15) between the two control positions in the vertical direction and in the transport direction (D) of the transport device (15). Such a rock processing plant has a simple and space-saving design, which permits a conversion to the different operating positions with little effort.

Claims

1. A rock processing plant, comprising: a machine frame; a screening unit supported on the machine frame, the screening unit including at least first and second screen decks offset from each other in a vertical direction, the first and second screen decks having first and second screen deck discharge areas, respectively; a transport device including an endless circulating transport conveyor belt extending in a transport direction at least partially between a transport conveyor belt feed area and a transport conveyor belt discharge area; and a mechanical actuator connected between the machine frame and the transport device, the mechanical actuator being configured to move the transport conveyor belt feed area of the transport device between a first control position wherein only the first screen deck discharge area coincides with the transport conveyor belt feed area, and a second control position wherein both of the first and second screen deck discharge areas coincide with the transport conveyor belt feed area, wherein the mechanical actuator is configured to move the transport conveyor belt feed area between the first and second control positions in both the vertical direction and the transport direction; wherein in the first control position the transport device is attached to the machine frame by a first swivel bearing configured such that the transport device can be swiveled about a first swivel axis to change an inclination of the transport device; and wherein in the second control position the transport device is attached to the machine frame by a second swivel bearing configured such that the transport device can be swiveled about a second swivel axis to change the inclination of the transport device.

2. The rock processing plant of claim 1, wherein: in each of the first and second control positions the inclination of the transport device can be adjusted in an angular range between about 0° and at least about 35°.

3. The rock processing plant of claim 1, wherein: the mechanical actuator is configured to effect both the change in inclination of the transport device and the movement of the transport device between the first and second control positions.

4. A rock processing plant, comprising: a machine frame; a screening unit supported on the machine frame, the screening unit including at least first and second screen decks offset from each other in a vertical direction, the first and second screen decks having first and second screen deck discharge areas, respectively; a transport device including an endless circulating transport conveyor belt extending in a transport direction at least partially between a transport conveyor belt feed area and a transport conveyor belt discharge area; a mechanical actuator connected between the machine frame and the transport device, the mechanical actuator being configured to move the transport conveyor belt feed area of the transport device between a first control position wherein only the first screen deck discharge area coincides with the transport conveyor belt feed area, and a second control position wherein both of the first and second screen deck discharge areas coincide with the transport conveyor belt feed area, wherein the mechanical actuator is configured to move the transport conveyor belt feed area between the first and second control positions in both the vertical direction and the transport direction; and a locking device including a first support part connected to the machine frame and a second support part connected to the transport device, the first and second support parts being adjustable in position relative to each other, and the first and second support parts being lockable relative to each other using a form-fit element in a plurality of locking positions corresponding to different inclinations of the transport device.

5. The rock processing plant of claim 4, wherein: the mechanical actuator is coupled to the first and second support parts such that the first and second support parts are moved relative to each other when the mechanical actuator moves.

6. The rock processing plant of claim 4, wherein: the mechanical actuator or the first support part is configured to rest on a further support part of the machine frame or of the transport device in a form-fitting manner in either of at least two mounting positions spaced apart in the vertical direction.

7. The rock processing plant of claim 6, wherein: the further support part includes a guide; and the mechanical actuator or the first support part includes a guide piece received in the guide to at least partially guide movement of the mechanical actuator or the first support part between the two mounting positions.

8. A rock processing plant, comprising: a machine frame; a screening unit supported on the machine frame, the screening unit including at least first and second screen decks offset from each other in a vertical direction, the first and second screen decks having first and second screen deck discharge areas, respectively; a transport device including an endless circulating transport conveyor belt extending in a transport direction at least partially between a transport conveyor belt feed area and a transport conveyor belt discharge area; a mechanical actuator connected between the machine frame and the transport device, the mechanical actuator being configured to move the transport conveyor belt feed area of the transport device between a first control position wherein only the first screen deck discharge area coincides with the transport conveyor belt feed area, and a second control position wherein both of the first and second screen deck discharge areas coincide with the transport conveyor belt feed area, wherein the mechanical actuator is configured to move the transport conveyor belt feed area between the first and second control positions in both the vertical direction and the transport direction; and a swivel mechanism connecting the transport device to the machine frame, the swivel mechanism being configured to guide the transport conveyor belt feed area between the first and second control positions.

9. The rock processing plant of claim 8, wherein: the swivel mechanism includes a holder and a swingarm, the holder and the swingarm each being coupled directly or indirectly to the machine frame by one joint and to the transport device by a further joint to form a four-bar linkage system.

10. The rock processing plant of claim 9, further comprising: a holding element arranged on the transport device or on the machine frame; wherein the holder of the swivel mechanism includes a catch element; and wherein in one position of the transport device the catch element is not in engagement with the holding element and in another position of the transport device the catch element is in engagement with the holding element.

11. The rock processing plant of claim 10, wherein: in the first control position the transport device is attached to the machine frame by a first swivel bearing configured such that the transport device can be swiveled about a first swivel axis to change an inclination of the transport device; and in the second control position the transport device is attached to the machine frame by a second swivel bearing configured such that the transport device can be swiveled about a second swivel axis to change an inclination of the transport device, the second swivel bearing being formed by the holding element and catch element.

12. The rock processing plant of claim 11, wherein: in the second control position the transport device is configured to be swiveled relative to the swingarm about an articulation axis defined by an articulation link, and the swingarm includes a positioning guide, the articulation link being movable within the positioning guide transverse to the axis of articulation.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a side view of a schematic representation of a rock processing plant,

(2) FIG. 2 shows an enlarged detail of the rock processing plant in a first operating position,

(3) FIG. 3 shows a further enlarged detail of the rock processing plant,

(4) FIG. 4 shows the rock processing plant of FIG. 3 in transition toward a second operating position,

(5) FIG. 5 shows the rock processing plant of FIG. 4 in the second operating position.

DETAILED DESCRIPTION

(6) FIG. 1 shows a rock processing plant 10, which is used to explain the invention by way of example. This rock processing plant 10 shown is a screening machine. However, the invention is not limited to the application at a screening machine. On the contrary, the invention may also be applied to another rock processing plant, such as a rock crusher, in particular a jaw crusher, a cone crusher or a rotary impact crusher having an assigned screening unit.

(7) Furthermore, the invention can also be applied to combined rock crushing plants having screening stations. The explanations below are therefore only described based on a screening station by way of example. The explanations below therefore apply in particular also to the rock processing plant mentioned above.

(8) As FIG. 1 shows, the rock processing plant 10 has a machine frame 13, which is supported by undercarriages 14, which are designed as crawler tracks, for instance. Furthermore, the rock processing plant 10 has a feed hopper 11. It can be used to feed rock material to be processed into the former. A conveyor is provided in the area of the feed hopper 11, which is formed, for instance, by a hopper discharge belt 12. Furthermore, instead of a hopper discharge belt 12, it is also conceivable to use a conveyor trough having a conveyor designed as a vibratory conveyor.

(9) Adjacent to the feed hopper 11, the rock processing plant 10 has a screening unit 20.

(10) As FIG. 1 shows, the screening unit 20 has an upper screen deck 21 downstream of the hopper discharge conveyor 12. The rock material is conveyed onto this screen deck 21 by means of the hopper discharge conveyor 12. The screen deck 21 has a screen grate having a predetermined mesh size. Rock material, which cannot fall through the screen deck 21 due to the grain size, is conveyed onto a conveyor belt 15 designed as an endlessly circulating conveyor belt and from there onto a dump pile. The rock material that falls through the screen deck 21 reaches the screen deck 22 below. The screen deck 22 in turn has a predetermined mesh size. Rock material that does not fall through the screen deck 22 is fed to a lateral discharge belt 17. This lateral discharge belt 17 extends laterally out of the working area of the screening unit 20. The screened-out material is piled up, as shown in FIG. 1. The screen material, which falls through the screen deck 22, reaches a conveyor 23, for instance an endlessly circulating conveyor belt. This screened-out fine material is routed to a fine grain discharge belt 16 and thus discharged from the working area of the machine. The screened-out fine material is piled up again on the side of the machine. The two screen decks 21 and 22 are driven by means of vibration drives, in particular eccentric drives.

(11) The conveyor 15 can be moved to a lower position such that the overflow upper deck material of the screen deck 21 and the overflow lower deck material of the screen deck 22 are discharged via the conveyor belt 15 and thus only two screen fractions are screened out. Accordingly, only one lateral fine grain conveyor belt 16 has been installed. Accordingly, the lateral discharge belt 17 can be omitted or it has either been dismantled or moved to a position/arrangement at the plant, in which this lateral discharge belt is accordingly out of function.

(12) Furthermore, it is conceivable that the fine grain discharge belt 16 and the lateral discharge belt 17 can be mounted on the machine frame 13 to either side of the machine. Furthermore, it is conceivable that the fine grain discharge belt 16 and the lateral discharge belt 17 are located on the same side of the plant.

(13) FIG. 2 shows an enlarged detail of the rock processing plant 10 more clearly. As this illustration shows, the transport device 15 has a frame, which supports the endless circulating conveyor belt 15.3. The transport device 15 forms a feed area 15.1 and a discharge area 15.2. The feed area 15.1 may be referred to as a transport conveyor belt feed area 15.1. The discharge area 15.2 may be referred to as a transport conveyor belt discharge area 15.2.

(14) The transport device 15 is secured to the machine frame 13. For this purpose, the machine frame 13 has a beam 50. A first swivel bearing 15.4 is arranged on the beam 50, on which the transport device 15 is swivel mounted.

(15) The transport device 15 is supported by means of a support 30 relative to the machine frame 13, for instance at an arm 51 of the beam 50, as shown in FIG. 2. The support 30 has two support parts 36 and 38, which can be moved linearly relative to each other, for instance telescoped relative to each other. The support part 36 is equipped with form-fit elements 39. These can be designed as drilled holes, as the drawing shows by way of example. There are form-fit counter elements 39.1, which can also be designed as drilled holes on the support part 36. In the control position of the transport device 15 shown in FIG. 2, a bolt can be inserted through the aligned drilled holes (form-fit element 39 and form-fit counter element 39.1). In this way, a locking device 35 is formed. The various positions defined by the placement of the bolt in the drilled holes 39, 39.1 of the support parts 36 and 38 may be referred to as locking positions.

(16) The support 30 is swivel coupled to the transport device 15 via a swivel bearing 37. On the opposite side, the support 30 is supported on a support part 40 of the machine frame 13 by means of a mounting element 43. The support part 40 can be attached to an arm 51 of the beam 50, as shown in FIG. 2 by way of example. The attachment to the support part 40 is designed in such a way that a detachable connection is provided here. This can be achieved, for instance, by means of a bolt, which is inserted through aligned holes in the support part 40 and in the support part 38. Because the locking device 35 locks the two support parts 36 and 38 relative to each other in a form-fitting manner, they cannot be moved relative to each other. This results in a fixed support length. The support 30 can therefore be used to support the transport device 15 on the machine frame 13

(17) As FIG. 2 further shows, a mechanical actuator 31 can be assigned to the support 30. In this exemplary embodiment, the mechanical actuator 31 is designed as a hydraulic cylinder. It is also conceivable to use other mechanical actuators 31, for instance a gear arrangement, a servomotor or the like. The hydraulic cylinder has a piston rod, which forms an actuating element 32. A connector 33 is used to connect the actuating element 32 to the support part 38. At the opposite end, a connector 34 is used to firmly couple the hydraulic cylinder to the second support part 36.

(18) FIG. 2 clearly shows that the screening unit 20 has the screen decks 21 and 22 described above. The two screen decks 21, 22 are arranged offset from each other in the vertical direction H, i.e. in the direction of gravity. Each of the screen decks 21, 22 has a discharge area A1 and A2, respectively. A1 forms the discharge area of the first screen deck 21 and A2 forms the discharge area of the second screen deck 22. The discharge area A1 may be referred to as a first screen deck discharge area A1. The discharge area A2 may be referred to as a second screen deck discharge area A2.

(19) FIG. 2 clearly shows that the discharge area A1 of the first screen deck 21 is assigned to, i.e. coincides with, the feed area 15.1 of the transport device 15. The discharge area A2 of the second screen deck 22 is routed to the feed area of the lateral discharge belt 17.

(20) The conveyor belt 15 has a hopper 18 to permit an orderly transfer of the rock material. This prevents rock material from falling off the side of the feed area 15.1. The lateral discharge conveyor 17 can also be equipped with such a hopper.

(21) During the operation of the plant, the rock material is fed from screen deck 21 in the discharge area A1 to the feed area 15.1 of the transport device 15. The rock material is then moved in the transport direction D along the transport device 15 and routed to the dump pile (see FIG. 1). In the same way, the rock material of the underlying screen deck 22 is fed to the lateral discharge conveyor 17. It is routed along a conveying direction via the lateral discharge conveyor 17 to a dump pile.

(22) As described above, the rock processing plant 10 can now be converted such that both rock fractions from the screen decks 21 and 22 are fed onto the transport device 15. As described above, for this purpose the lateral discharge conveyor 17 is removed or adjusted such that it is moved out of the discharge area A2.

(23) As FIG. 2 illustrates, a holder 61 is attached to the machine frame 13 in a swiveling manner by means of a joint 62. The holder 61 can, for instance, be attached to a lug 52 of the beam 50 in a swiveling manner. The holder 61 has a lever at the end of which there is a catch element 63. The catch element 63 is designed in the form of an undercut recess. The holder 61 and its catch element 63 are particularly preferably designed to have the form of a swivel hook.

(24) In the home position shown in FIG. 2, a ramp 63.1 of the catch element 63 is in contact with a retaining element 54. The retaining element 54 may be designed to be a pin or bolt. The retaining element 54 is secured to the transport device 15.

(25) FIG. 2 shows that in the basic position the holder 61 is supported on the lug 52 by a securing element 53. The securing element 53 prevents the holder 61 from turning downwards. To convert the transport device 15, first the securing element 53 is removed. Then the locking device 35 is released and the form-fit connection formed there is opened. Now the mechanical actuator 31 can be activated, wherein the distance between the two connectors 33, 34 is reduced. This can be done by retracting the actuating element 32 (piston rod) into the hydraulic cylinder. During this motion the inclination of the transport device 15 is adjusted. In FIG. 3 this inclination adjustment is symbolized by the arrow S, which shows the swivel motion. As soon as the retaining element 54 is caught in the catch element 63 in a form-fitting manner, the transport device 15 cannot be moved any further in the direction of the swivel motion S. The transport device 15 is now secured at the first swivel bearing 15.4 and at the holder 61.

(26) Because in this position no forces act on the support 30 and thus on the actuator 31, the mounting element 43 can be released.

(27) FIG. 3 shows that the support 30 has a guide piece 41, which is located in the area of the support part 40. This guide piece 41 can be linearly adjusted in a guide 41.1 of the support part 40. When the mounting element 43 is released, the hydraulic cylinder can be activated. In doing so, the actuating element 32 is extended. As a result of this extension motion, the guide piece 41 in the guide 41.1 moves to the position shown in FIG. 4. In this position, a mounting element 42 can again be used to connect the support 30 to the beam 50 in a form-fitting manner. This can be done again, for instance, using a pin or a bolt. In this position the transport device 15 is now supported in a statically over-determined manner on the holder 61, the support 30 and the first swivel bearing 15.4. Therefore, the connection of the first swivel bearing 15.4 can be opened. The first swivel bearing 15.4 may, for instance, be formed in such a way that the beam 50 and the transport device 15 have aligned holes through which a pin or bolt is inserted. This pin or bolt can now be pulled to open the first swivel bearing 15.4. The transport device 15 is then secured on the machine frame 13 in a statically determined manner by the holder 61 and the support 30.

(28) FIGS. 4 and 5 show the transition of the transport device 15, wherein the feed area 15.1 of the transport device 15 is moved from the first control position according to FIG. 4 to the second control position according to FIG. 5. During this positioning motion, the feed area 15.1 is adjusted both in the vertical direction H and in the transport direction D of the transport device 15.

(29) The positioning motion is guided using a swivel mechanism 60. The swivel mechanism 60 comprises the holder 61 described above and the swingarm 64, which is clearly visible in FIG. 5. The holder 61 and the swingarm 64 are each connected to the machine frame 13, preferably the beam 50, via one joint 62, 64.1 each in a swiveling manner. The swivel axis is perpendicular to the image plane as shown in FIG. 5. Furthermore, the holder 61 and the swingarm 64 are connected to the transport device 15 via a further joint 54.1 and 19.1 each. The joints 62, 64.1, the further joints 54.1 and 19.1 and the holder 61 and the swingarm 64 are used to form a four-bar linkage system, in this exemplary embodiment a parallelogram four-bar linkage system.

(30) The four-bar linkage system does not necessarily have to be a parallelogram. If it is a parallelogram four-bar linkage system, the angle of attack of the discharge belt remains the same before and after the belt is shifted. If the four-bar linkage system deviates from the parallelogram shape, the angle of attack of the belt will also change with the shifting of the belt.

(31) Actually, in the example shown here, the parallelogram is not a proper parallelogram but the deviation from the parallelogram shape is marginal. This means that the angle of attack of the take-off belt before and after shifting remains almost the same but not exactly the same.

(32) If now, starting from the first control position according to FIG. 4, the actuator 31 is actuated, the distance between the two connectors 33, 34 decreases. As a result of this shortening, both the holder 61 and the swingarm 64 swing downwards. This causes the transport device 15 to be moved to the second control position, as shown in FIG. 5. Due to the use of a parallelogram four-bar linkage system, the inclination of the transport device 15 is preferably kept constant during this adjustment. It is of course also conceivable that a four-bar linkage system that is not a parallelogram four-bar linkage system could be used, in which the connecting line between the axes of articulation of the joint 62 and the further joint 54.1 on the one hand and the connecting line between the axes of articulation of the first swivel bearing 15.4 and the further joint 19.1 on the other hand, are not parallel. In this case, however, the inclination of the transport device 15 in relation to the horizontal changes when moving from the first control position to the second control position.

(33) In the second control position shown in FIG. 5, the feed area 15.1 of the transport device 15 is arranged such that it is assigned to both the discharge area A1 of the first screen deck 21 and the discharge area A2 of the second screen deck 22. Both screen decks 21 and 22 can therefore feed the rock material guided thereon onto the transport device 15. The hopper 18 is designed to prevent rock material from falling off both screen decks 21 and 22.

(34) As FIG. 5 shows, the holder 61 is adjusted such that the retaining element 54 of the other joint 54.1 is aligned with a bearing support 15.7. A second swivel bearing 15.6 can be formed by means of this bearing support 15.7 and the retaining element 54. This is possible, for instance, if retaining element 54 has a bearing bore, which is aligned with the bearing support 15.7. A pin or bolt can then be inserted through the aligned holes to form the bearing axis. The second swivel bearing 15.6 now forms the axis about which the transport device 15 can be swiveled to adjust its angle of inclination.

(35) This inclination adjustment is again performed by means of the actuator 31. If the actuator 31 is used to increase the distance between the connectors 33, 34, the angle of inclination of the transport device 15 in relation to the horizontal increases as well. The swivel motion S is made possible in particular because one articulation link 19 of the further joint 19.1 of the swingarm 64 can be moved in a positioning guide 64.3, for instance a slotted hole. The minimum and maximum setting angle of the transport device 15 is limited by the ends 64.2 of the slotted hole, against which the articulation link 19 strikes in both extreme positions. The control position is again fixed by means of the locking device 35, as described above.

(36) If the transport device 15 is now to be moved conversely from the second control position shown in FIG. 5 to the first control position shown in FIG. 2, the working sequence described above must be performed in the reverse direction.

LIST OF THE REFERENCE NUMERALS

(37) Following is a summary of the reference numerals: 10 Rock processing plant 11 Feed hopper 12 Hopper discharge belt 13 Machine frame 14 Chassis 15 Transport device 15.1 Feed area 15.2 Discharge area 15.3 Conveyor belt 15.4 First swivel bearing 15.5 Bearing bore 15.6 Second swivel bearing 15.7 Bearing support 16 Fine grain conveyor belt 17 Lateral discharge conveyor 18 Hopper 19 Articulation link 19.1 Further joint 20 Screening unit 21 Screen deck 22 Screen deck 23 Conveyor 30 Support 31 Mechanical actuator 32 Actuating element 33 Connector(s) 34 Connector(s) 35 Locking device 36 Support part 37 Swivel bearing 38 Support part 39 Form-fit element 39.1 Form-fit counter element 40 Support part 41 Guide piece 41.1 Guide 42 Mounting element 43 Mounting element 50 Beam 51 Arm 52 Lug 53 Securing element 54 Holding element 54.1 Further joint 60 Swivel mechanism 61 Holder 62 Joint 63 Catch element 63.1 Ramp 64 Swingarm 64.1 Joint 64.2 End 64.3 Positioning guide S Swivel motion D Transport direction A1 Discharge area screen deck 1 A2 Discharge area screen deck 2 H Vertical direction