EP3642454A1 - Bucket wheel excavator with offset conveyor device - Google Patents
Bucket wheel excavator with offset conveyor deviceInfo
- Publication number
- EP3642454A1 EP3642454A1 EP18745826.0A EP18745826A EP3642454A1 EP 3642454 A1 EP3642454 A1 EP 3642454A1 EP 18745826 A EP18745826 A EP 18745826A EP 3642454 A1 EP3642454 A1 EP 3642454A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bucket wheel
- axis
- plane
- chute
- baffle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000005065 mining Methods 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 description 28
- 210000002414 leg Anatomy 0.000 description 10
- 210000003414 extremity Anatomy 0.000 description 6
- 210000000689 upper leg Anatomy 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/02—Conveying equipment mounted on a dredger
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
- E02F3/181—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels including a conveyor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
- E02F3/188—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with the axis being horizontal and transverse to the direction of travel
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
Definitions
- the invention relates to a bucket wheel excavator according to the preamble of claim 1.
- Bucket wheel excavators are devices for mining in particular mineral raw materials.
- a bucket wheel excavator usually comprises at least one chassis with a rotatable about a pivot center superstructure, comprising a base frame with counterweight, a height-adjustable boom with paddle wheel and conveyor belt, and a relative to the superstructure pivotable discharge device.
- the chassis can be designed as a walking mechanism or more widely used as a crawler chassis.
- the impeller is arranged in a known manner at the end remote from the pivot center of the boom.
- the paddle wheel can be pivoted to the main extension axis of the conveyor and / or tilted.
- the pivoting of the paddle wheel about a vertical axis at the head-to-head point is preferred in order to enable a free-cutting angle for a side-mounted paddle wheel drive to the side slope.
- the paddle wheel can be tilted about the main extension axis of the conveyor to improve the emptying of the conveyed material on the conveyor belt.
- a common design of bucket wheel excavators provides that the superstructure is pivoted at an angle of 90 ° to the direction of degradation. The direction of rotation of the blade wheel is dependent on the blade arrangement.
- the paddle wheel picks up the material removed at that moment via the blades and transports it upwards with the rotary motion in the blades.
- the removed material is passed by means of a Schaufelradschurre on the conveyor.
- the removed material is transported by the conveyor belt to the center of rotation of the superstructure, bounces off the conveyor against a baffle and falls from there by means of a ring chute on a discharge device that transports the material removed from the center of rotation in any discharge direction and throws.
- the ring chute is arranged at the end opposite the indicator wheel under the conveying device of the jib and in the region of the pivoting center or swivel axis. From the launching device For example, the excavated material of the prior art is conveyed to the destination, such as a heap, a dump, a crusher, or a loader.
- the pre-head point is located on the horizontally cut paddle wheel at the point furthest away from the pivot axis of the boom and towards the material to be removed.
- an alternative bucket wheel excavator is known from the published patent application DE 10 2004 033 934 A1 in the prior art.
- This bucket wheel excavator is mainly suitable for the removal of high-strength materials for the deep section below the footprint of the bucket wheel excavator and / or below the water level.
- conveyed goods are not transferred via the center of rotation or the pivot axis.
- this leads to a significant reduction of the possible swivel angle range. This is due to the fact that the vertical pivot axis of the boom is located relatively centrally in the main extension axis of the boom. If the boom with the paddle wheel is now pivoted about a pivoting angle, so the boom swings with its remote from the paddle wheel by the same pivot angle.
- the bucket wheel excavator is designed very low cut and not suitable for mining with wide swivel angles. Because of the low pivoting angle, the degraded conveyed over a particularly large-sized transfer chute is transferred to the abinnende conveyor belt of the discharge device.
- the transfer chute is in particular a slot chute, also called slot bunker. Because of the low pivot angle, the transfer chute is usually static motion, that is independent of the pivot angle of the boom formed. Likewise, the discharge device is static motion. Due to the orientation of the paddle wheel along the main axis of extension of the boom, a turntable on the paddle wheel is necessary. This significantly increases the weight of the bucket wheel head and hence the entire bucket wheel excavator, and thus is costly.
- the asymmetrical attachment of the cutting elements on the blades of the swiveled blade wheel according to the aforementioned bucket wheel excavator can only bring about a local improvement in terms of a reduced regrooving effect, for example in the pre-head point.
- Cutting elements that are not arranged in the pre-head point continue to have the aforementioned Nachschneide bine and thus increased wear of the central cutting elements.
- an asymmetric arrangement of the cutting elements on the blades additionally requires a larger blade width. This leads to increased overall costs relating to the paddle wheel.
- the bucket wheel excavator should be able to serve the widest possible tilt angle behind the bucket wheel excavator in a compact and inexpensive design without physical obstacles.
- this object is solved by the features of claim 1.
- the uniform loading of the cutting elements resulting from the new design of the bucket wheel excavator also makes it possible, with the same dimensioning of the cutting elements, to remove harder and more abrasive materials compared with conventionally designed bucket wheel excavators.
- conveyed material is transferred from the conveying device to the discharge device by means of the chute in the region of the pivot axis of the delivery arm.
- a preferred embodiment of the invention is that the main extension axis of the conveyor so skewed runs to the pivot axis of the boom, that the main extension axis has a horizontal offset to the pivot axis of the boom.
- the main extension axis of the conveyor extends completely parallel to the horizon, but may also have a vertical pivoting of up to 15 ° to the horizon.
- the horizontal offset of the conveyor at the point of the smallest distance between the main extension axis of the conveyor and the pivot axis of the boom is at least 10%, preferably at least 25%, more preferably at least 40% of the total width of the bucket wheel width together with the belt width.
- An advantageous embodiment of the invention provides that the horizontal offset of the conveyor together at the point of the smallest distance between the main extension axis of the conveyor and the pivot axis of the boom at most 80%, preferably at most 70%, more preferably at most 60% of the total width of the bucket wheel width with the belt width is.
- Particularly advantageous intervals of the aforementioned exemplary ratios of the horizontal offset at the point of the smallest distance between the main axis of extension of the conveyor and the pivot axis of the boom are that the aforementioned horizontal offset 10% to 80%, preferably 25% to 70%, especially Preferably 40 to 60% of the total width of the bucket wheel width is together with the belt width. It has been found that the angle of the pivoting of the blade wheel and thus the wear of the cutting elements in these areas can be reduced particularly advantageously. It has also been found that in the edge regions of the respective, above-mentioned interval levels a similar wear exists, whereby the wear becomes smaller with narrowing interval.
- the paddle wheel In order to advantageously position the paddle wheel for reducing the wear of the cutting elements, provision is made in particular for the paddle wheel to be arranged on the cantilever so that the paddle wheel encloses an angle with two leg levels at a front-head point designed as a vertex whose first leg plane projects from the front head Point extends to the vertical pivot axis of the boom and whose second leg plane extends from the head-to-head point along the blade wheel symmetry radial plane.
- the angle between the first and the second leg plane is at least or exactly 0 ° by way of example.
- the angle between the first and the second limb plane can be, for example, at most 15 °, preferably at most 10 °, particularly preferably at most 5 °.
- Particularly advantageous intervals of the aforementioned exemplary indications of the angle between the first and the second thigh plane are that the angle is in each case including 0 ° to 15 °, preferably 0 ° to 10 °, particularly preferably 0 ° to 5 °.
- the smaller the angle the better the wear of the cutting elements can be reduced on the one hand, and evened out on the other hand.
- an angle of at most 3 ° is preferred. It should be noted that due to the unpredictability of the mining conditions, the cutting elements are always subject to different, alternating degrees of hardness and thus to different levels of wear.
- An angle of no more than 5 °, in particular not more than 3 °, may already be sufficient, because the wear may not be significantly evened out due to existing uneven mining conditions for the cutting elements.
- the angle set as mentioned above is thus advantageous in order to even out the wear of the cutting elements per blade. It has been found that in the edge regions of the respective, above-mentioned interval levels, a similar wear exists, the wear is reduced with narrowing interval.
- the aforementioned feature has the economically meaningful property that the cutting elements due to the uniform wear together are to be exchanged. This leads to the lowest possible downtime of the bucket wheel excavator according to the teaching of the invention.
- the main extension axis of the conveying device runs essentially parallel to the first leg plane.
- substantially parallel means that the main extension axis can be arranged inclined up to 10 ° to the first leg plane.
- an inclination of 0 ° that is a complete parallelism in the mathematical sense, is particularly preferred.
- the chute of the bucket wheel excavator is preferably a ring chute. It has been shown that ring chutes are particularly suitable for receiving the removed material as completely as possible despite the horizontally offset conveyor.
- a baffle wall with a baffle plane is arranged above the chute, the baffle enclosing a baffle wall between two intersecting baffle planes, the first baffle plane being at right angles extends to the first leg plane and wherein the second baffle leg plane extends along the baffle plane.
- the baffle wall angle can preferably be at least 0 °, preferably at least 15 °, particularly preferably at least 30 °. According to a preferred embodiment of the invention, the baffle angle can be at most 60 °, preferably at most 50 °, particularly preferably at most 40 °.
- the baffle wall angle is preferably 0 ° to 60 °, preferably 15 ° to 50 °, particularly preferably 30 to 40 °. It has been found that in the edge regions of the respective interval stages, a similar amount of the material is conducted from the conveyor into the chute, the amount of material increasing as the interval becomes narrower. It is likewise preferred that the baffle wall has a baffle plane extending concavely to the vertical pivot axis. It has been shown that by this embodiment of the baffle wall bouncing from the conveyor to the baffle material scattered as little as possible. Thus, the amount of material accumulating in the chute increases.
- a main axis of inertia of the chute extends along the pivot axis of the cantilever.
- an axis of symmetry of the chute can run along the pivot axis of the jib.
- FIG. 1 is a schematic plan view of a bucket wheel excavator according to the prior art
- FIG. 2 shows a schematic plan view of a bucket wheel excavator according to a first embodiment
- Figure 3 is a schematic plan view of a bucket wheel excavator according to a second embodiment
- Figure 4 is a schematic side view of a bucket wheel excavator according to one of the two embodiments.
- a plan view of a bucket wheel excavator (1) according to the prior art for the continuous degradation of material (5) are shown schematically.
- the illustrated blade Wheeled excavator (1) is particularly suitable for use in an opencast mine.
- the bucket wheel excavator (1) has a bucket wheel (2) rotatable about a central axis (M), wherein the bucket wheel (2) comprises a plurality of blades (3) arranged circumferentially.
- the bucket wheel (2) has a bucket wheel width (SB) and a bucket wheel symmetry radial plane (Y).
- the bucket wheel width (SB) extends along the central axis (M).
- the impeller radial symmetry plane (Y) is perpendicular to the central axis (M) and intersects this central axis (M) at half the impeller width (SB).
- the bucket wheel excavator (1) has a conveying device (4) with a main extension axis (F) for conveying the material (5) removed by means of the bucket wheel (2).
- the conveying device (4) also has a belt width (BB) which, as shown in FIG. 1, is perpendicular to the main extension axis (F) of the conveying device (4).
- Both the impeller (2) and the conveyor (4) are mounted on a about a vertical pivot axis (X) pivotable boom (6).
- the paddle wheel (2) is arranged in an end region of the boom (6).
- the bucket wheel excavator (1) For receiving the material (5) from the conveying device (4), the bucket wheel excavator (1) comprises a chute (7).
- the chute (7) is arranged at the end of the discharge device (4) of the delivery arm (6) opposite the impeller (2). In this case, the chute (7) under the end of the discharge device (4) of the boom (6). Furthermore, substantially the chute (7) in the region of the pivot axis (X) is arranged. In the region of the pivot axis (X), in particular the area in which the pivot axis (X) of the arm (6) penetrates the chute (7) in a projected horizontal section.
- Fig. 1 It is disclosed only in Fig. 1 that the main extension axis (F) of the conveyor (4) according to the prior art through the pivot axis (X) of the boom (6).
- a baffle wall (9) with a baffle extension plane (PA) is arranged, the baffle plane extending (PA) perpendicular to the main extension axis (F) of the conveyor (4).
- the bucket wheel excavator (1) differs substantially from the bucket wheel excavator (1), as the main extension axis (F) of the conveyor (4) skewed to the pivot axis (X) of the boom (6). runs.
- the main extension axis (F) of the conveyor (4) is skewed to the pivot axis (X) of the boom (6) that the Main extension axis (F) has a horizontal offset (FV) to the pivot axis (X) of the boom (6).
- the preferred horizontal offset (FV) according to FIGS. 2 and 3 makes possible a reduced angle (a) in comparison with the embodiment shown in FIG. 1, that is to say that the impeller (2) of the first and second embodiments according to the invention has less pivoting
- the blades (3) engage in the material (5) to be removed with an increased circumferential proportion.
- the present not shown cutting elements of the individual blades (3) are thus claimed more uniform compared to the prior art.
- a particularly uniform loading of the cutting elements of the blades (3) results from the second embodiment of the bucket wheel excavator (1) according to FIG. 3.
- FIGS. 2 and 3 it is shown by way of example in FIGS. 2 and 3 that the preferred horizontal offset (FV) of the conveying device (FIG.
- bucket wheel width (SB) corresponds to exactly 50% of the total width of the bucket wheel width (SB) together with the belt width (BB) at the point of the smallest distance.
- the bucket wheel width (SB) and the belt width (BB) can have the same amount. However, the bucket wheel width (SB) and the belt width (BB) need not necessarily have the same amount.
- the bucket wheel (2) is arranged in particular on the boom (6) such that the bucket wheel (2) encloses an angle (a) with two leg levels (S1, S2) at a front-head point (P) formed as a vertex ,
- the pre-head point (P) is located on the horizontally cut paddle wheel (2) at the point furthest from the pivot axis (X) of the boom (6) and directed towards the material (5) to be removed.
- the first limb plane (S1) preferably extends from the pre-head point (P) to the pivot axis (X) of the boom (6).
- the second limb plane (S2) particularly preferably extends from the pre-head point (P) along the bucket wheel symmetry radial plane (Y).
- the angle (a) in the first embodiment shown in FIG. 2 is by way of example 3 °.
- the angle (a) is 0 ° by way of example.
- the angle interval of the angle (a) is by way of example 0 ° to 15 °, preferably 0 ° to 10 °, particularly preferably 0 ° to 5 °.
- the angle (a) for small and compact excavators, for example, 10 ° to 15 ° and for medium and large excavators preferably be 5 ° to 10 °.
- the main extension axis (F) of the conveyor (4) is preferably parallel to the first leg plane (S1). In all Figs.
- the chute (7) is exemplified as a ring chute, so that the main extension axis (F) according to FIGS. 1 to 3 in horizontal sectional view as a secant askew skew to the pivot axis (X) of the boom (6) or to the axis of rotation of the chute (7).
- a baffle wall (9) with a baffle plane (PA) can be arranged above the chute (7).
- the baffle wall (9) in each case encloses a baffle wall angle ( ⁇ ) between two intersecting baffle wall limb planes (P1, P2).
- the first baffle limb plane (P1) extends in particular at right angles to the first limb plane (S1).
- the second baffle plane (P2) extends preferably along the baffle plane (PA).
- the baffle angle (ß) is in FIGS. 2 and 3 by way of example 30 °.
- the angular interval of the baffle wall angle ( ⁇ ) is for example 0 ° to 60 °, preferably 15 ° to 50 °, particularly preferably 30 ° to 40 °.
- a main axis of inertia of the chute (7) preferably extends along the pivot axis (X) of the jib (6).
- an axis of symmetry of the chute (7) preferably runs along the pivot axis (X) of the jib (6).
- the main axis of inertia of the chute (7) simultaneously forms the symmetry axis of the chute (7).
- FIG. 4 shows a schematic side view of a bucket wheel excavator (1) according to one of the two embodiments according to FIGS. 2 or 3.
- the bucket wheel (2) of the bucket wheel excavator (1) is rotatably mounted about its axis of rotation (M) and can remove material (5) from its circumferentially arranged blades (3).
- the removed material (5) falls during the rotation of the paddle wheel (2) by gravity in a in the upper half of the paddle wheel (2) arranged Schaufelradschurre (10).
- the removed material (5) is forwarded to the conveying device (4).
- the conveyor (4) conveys the removed material (5) along its main extension axis (F) to a region above the chute (7).
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017210277.2A DE102017210277A1 (en) | 2017-06-20 | 2017-06-20 | Bucket wheel excavator with staggered conveyor |
PCT/EP2018/066444 WO2018234390A1 (en) | 2017-06-20 | 2018-06-20 | Bucket wheel excavator with offset conveyor device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3642454A1 true EP3642454A1 (en) | 2020-04-29 |
EP3642454B1 EP3642454B1 (en) | 2024-08-14 |
Family
ID=63014485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18745826.0A Active EP3642454B1 (en) | 2017-06-20 | 2018-06-20 | Bucket wheel excavator with offset conveyor device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3642454B1 (en) |
DE (1) | DE102017210277A1 (en) |
WO (1) | WO2018234390A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111559651B (en) * | 2019-02-14 | 2021-12-07 | 南通奥普机械工程有限公司 | Double-open bucket wheel device for stacker-reclaimer |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1436105A (en) * | 1965-03-23 | 1966-04-22 | Beteiligungs & Patentverw Gmbh | Transfer facility serving storage locations |
DE2161546A1 (en) * | 1971-12-11 | 1973-06-14 | Babcock & Wilcox Ag | IMPELLER BLADE |
SU1270222A1 (en) | 1983-05-13 | 1986-11-15 | Московский Ордена Трудового Красного Знамени Горный Институт | Working equipment of bucket-wheel excavator |
FR2580611B1 (en) * | 1985-04-17 | 1990-12-14 | Etude Service Technologie Sa | CONTINUOUS COLLECTION AND LOADING MACHINE OF A PRODUCT DEPOSITED IN CASE |
DE19730374C1 (en) * | 1997-07-16 | 1998-09-24 | Krupp Foerdertechnik Gmbh | Bucket wheel drive for dredger |
DE102004033934B4 (en) * | 2004-07-14 | 2023-08-10 | Thyssenkrupp Industrial Solutions Ag | Bucket wheel excavator for mining high strength materials for continuous dredging |
-
2017
- 2017-06-20 DE DE102017210277.2A patent/DE102017210277A1/en active Pending
-
2018
- 2018-06-20 EP EP18745826.0A patent/EP3642454B1/en active Active
- 2018-06-20 WO PCT/EP2018/066444 patent/WO2018234390A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE102017210277A1 (en) | 2018-12-20 |
EP3642454B1 (en) | 2024-08-14 |
WO2018234390A1 (en) | 2018-12-27 |
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