DE102008060664A1 - Protective device for a bucket wheel excavator - Google Patents

Abstract

The invention relates to a protective device for a bucket wheel excavator, with an on the grave side of a rotating blade wheel (4) facing away from the side fender (6). According to the invention, the protective plate (6) has on its inside (6a) facing the impeller (4) at least one mechanical resistance element (8) extending in the direction of the impeller (4).

Description

The The invention relates to a protective device for a bucket wheel excavator according to the preamble of claim 1.

A protective device according to the preamble of claim 1 is already known by an embodiment of the Applicant ( company brochure, "Open Pit Mining Systems and Equipment", No. 05/1 / 1003e10060710, "Standard and compact bucket wheel excavators", pages 12 and 13 ). A bucket wheel excavator with such a protective device is usually used in open-pit mining for the removal and removal of large quantities of grave goods and / or loose materials. The paddle wheels of such bucket wheel excavators can have a diameter of more than 10 meters.

Out The aforementioned advertising is already the use of a bucket wheel excavator for excavating hard materials (eg overburden over Brown coal seams in the open pit or the like) with a Sometimes fast-spinning paddle wheel known. It has the illustrated Bucket wheel excavator on the side of his paddle wheel facing away from the tomb front a protective or deflecting arranged, which means excavators (Conveyor boom, etc.) and the environment from falling down or protect flying pieces of excavated grave goods should. Larger chunks of the funerary can cause serious damage to the bucket wheel excavator (eg on the above-mentioned internal discharge belt and / or its support structure) or remain as obstacles in the driveway of the excavator. By Such obstacles can then the caterpillars of the Close the excavator chassis excessively or even damaged. This leads to avoidable Maintenance and repair work and therefore too extreme costly downtime of the excavator and the conceivable subsequent facilities involved in the process.

Of the present invention is based on the object, a protective device to provide for a bucket wheel excavator through which Dredging equipment and the crawler tracks of the bucket wheel excavator protected and the downtime of the bucket wheel excavator and the facilities or facilities cooperating with it be minimized.

According to the invention this task through the entirety of the characteristics of the independent Claim 1 solved. By doing that at least segmentally circumferentially around the impeller arranged around fender on its inside at least one towards the paddle wheel extending, having mechanical resistance element can larger parts of the grave goods, for example jammed in the teeth of the blades of the paddle wheel have to be detached from the scoop and crushed. This effectively prevents larger ones Brocken of the grave goods from the paddle wheel from the mining area removed and - instead of on the conveyor belt to be filed - on the planum in the driveway of Bucket wheel excavators can fall. The at least one, mechanical Resistance element is advantageous as a tooth-like or thorn-like or knife-like element formed. That's at least that a mechanical resistance element designed to be interchangeable with advantage or interchangeable anchored in the mudguard. Furthermore is conceivable that every single resistance element and / or the mudguard in its entirety is designed so adjustable that the Distance between the tips of the rotating blades of the paddle wheel and the tips of the blades extending in the direction of the blades Resistance elements is variable. With advantage are on the inside the baffle several resistance elements, in particular two or three resistive elements arranged. At least in each case two of the resistance elements across the width of the mudguard seen offset and / or seen in tangential longitudinal extent staggered. Due to the exchangeability of the resistance elements Defects can be fixed quickly and worn out Simply exchange elements.

Further Advantages, special features and expedient further education The invention will become apparent from the dependent claims and the following drawing representation of preferred embodiments.

It demonstrate:

1 the outer arm portion of a bucket wheel excavator having a paddle wheel rotatably mounted thereon and a guard according to the invention;

2 a plan view of the inside of the protective device according to 1 with a possible arrangement of the resistive elements and

3 a plan view analogous to 2 with another possible arrangement of the resistive elements 2 ,

In 1 is the free end of an excavator arm 2 a bucket wheel excavator with one at the free end of the excavator 2 rotating paddle wheel 4 shown. The paddle wheel 4 has for the removal of grave G circumferentially a variety of blades 4a on. About the paddle wheel 4 or its blades 4a becomes on the the grave goods G too facing side of the paddle wheel 4 the grave goods G are removed and from the shovels 4a towards bucket wheel excavator on one in the excavator arm 2 integrated conveyor belt F conveyed. So that larger chunks B of the grave G, which, for example, in the tips of the blades 4a have stuck and therefore can not be placed on the conveyor belt F, do not fall on the subgrade and there in the track of the crawler tracks of the bucket wheel excavator (or on the Planum P) come to rest, has the fender 6 on its inside 6a at least one towards the paddle wheel 4 extending mechanical resistance element 8th on. By going in the direction of shovels 4a extending resistance element 8th Shocked pieces B of the grave G are to be removed from the shovel 4a be dissolved and crushed, so that an unintentional transport of rough Grabgutbrocken B is avoided in the track of the crawler tracks. In this case, the at least one resistance element 8th radially from the inside 6a the mudguard 6 to the paddle wheel or to the blade 4a be arranged pointing. Alternatively, a resistance element 8th , all resistance elements 8th or one of the resistive elements 8th also angled on the inside 6a the mudguard 6 be arranged - in particular such that the respective resistance element 8th with its longitudinal axis (and tip) against the direction of rotation of the paddle wheel 4a is aligned.

Advantageously, a plurality of such resistance elements 8th provided for example in the form of thorns, teeth or knives or the like. For this purpose, the resistance elements 8th in particular a conical, pyramidal or blade-shaped contour. The resistance elements 8th are with advantage positive and / or positive on the inside 6a the mudguard 6 interchangeable arranged.

In the embodiments according to 2 and 3 are three and up to five such resistance elements 8th represented in possible geometric arrangements.

According to 2 For example, there are three resistive elements 8th in a line substantially centered along the longitudinal extent of the mudguard 6 arranged. Advantageously, each of the resistance elements 8th formed such or on the inside of the mudguard 6 arranged that every resistance element 8th with its free end or its towards shovels 4a pointing tip a substantially equal distance d to the orbit u of the free ends or tips of the blades 4a having.

In 3 is another possible arrangement of the resistive elements 8th on the inside 6a the mudguard 6 shown. Here are, for example, three or five resistor elements 8th illustrated, wherein at least two of the resistive elements 8th Seen across the width of the guard plate offset from each other and seen in the radial longitudinal extent of the mudguard are arranged one behind the other.

Due to the exchangeability of the resistor elements 8th These can be material and form specific to different purposes.

2

excavator (Bucket wheel boom)

4

paddle wheel

4a

shovel

6

mudguard

6a

inside (Fender)

8th

resistive element

G

Grabgut

P

Planum (Infrastructure)

F

conveyor belt

B

chunk of the grave goods G

u

orbit the blade tips

d

Distance between tip resistance element 8th and orbit and

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited non-patent literature

• - Company brochure, "Open Pit Mining Systems and Equipment", No. 05/1 / 1003e10060710, "Standard and compact bucket wheel excavators", pages 12 and 13 [0002]

Claims (6)

Protective device for a bucket wheel excavator, with one on the digging side of a rotating paddle wheel ( 4 ) facing away side-facing fender ( 6 ), characterized in that - the fender ( 6 ) on his the paddle wheel ( 4 ) facing inside ( 6a ) at least one towards the paddle wheel ( 4 ) extending mechanical resistance element ( 8th ) having. Protective device according to claim 1, characterized in that the at least one mechanical resistance element ( 8th ) is designed as a tooth-like or thorn-like or knife-like element. Protective device according to one of the preceding claims, characterized in that the at least one mechanical resistance element ( 8th ) exchangeable trained or interchangeable in the fender ( 6 ) is anchored. Protective device according to one of the preceding claims, characterized in that at least two, preferably three mechanical resistance elements ( 8th ) on the inside ( 6a ) of the mudguard ( 6 ) are arranged. Protective device according to claim 4, characterized in that at least three resistance elements ( 8th ) are provided, of which - at least two across the width of the mudguard ( 6 ) seen offset from each other, - and / or at least two, in tangential longitudinal extent of the mudguard ( 6 ), seen offset from each other. Bucket wheel excavator with - a crawler chassis, - a support frame arranged on the crawler chassis, - an excavator arm arranged on the support frame ( 2 ), the excavator arm ( 2 ) a conveyor belt (F) and at its end remote from the support frame rotatably mounted paddle wheel ( 4 ), characterized by a protective device according to one of the preceding claims.