US20150275664A1 - Extraction installation for mineral extraction - Google Patents

Extraction installation for mineral extraction Download PDF

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Publication number
US20150275664A1
US20150275664A1 US14/442,002 US201314442002A US2015275664A1 US 20150275664 A1 US20150275664 A1 US 20150275664A1 US 201314442002 A US201314442002 A US 201314442002A US 2015275664 A1 US2015275664 A1 US 2015275664A1
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United States
Prior art keywords
chain
mount
extraction
machine body
tensioning device
Prior art date
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Abandoned
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US14/442,002
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English (en)
Inventor
Adam Klabisch
Manfred Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Global Mining Europe GmbH
Original Assignee
Caterpillar Global Mining Europe GmbH
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Filing date
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Application filed by Caterpillar Global Mining Europe GmbH filed Critical Caterpillar Global Mining Europe GmbH
Assigned to CATERPILLAR GLOBAL MINING EUROPE GMBH reassignment CATERPILLAR GLOBAL MINING EUROPE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZIEGLER, MANFRED, KLABISCH, ADAM
Publication of US20150275664A1 publication Critical patent/US20150275664A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
    • E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
    • E21C29/14—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
    • E21C29/145—Means for tensioning the haulage chains or cables
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/32—Mineral freed by means not involving slitting by adjustable or non-adjustable planing means with or without loading arrangements
    • E21C27/34—Machine propelled along the working face by cable or chain

Definitions

  • the present disclosure relates to an extraction machine. More particularly, the present disclosure relates to an extraction machine of an extraction installation for mineral extraction.
  • the present disclosure is based on an extraction installation and an extraction machine together with traction carriage according to DE 10 2006 027 955 A1 and DE 10 2007 053 206 A1.
  • the chain ends of an endless drive chain for the extraction machine formed as a coal plow are arranged on a traction carriage.
  • the traction carriage via a resilient element as coupling device, designated as a damping device, is arranged movably to a limited degree against the restoring force of plate spring assemblies in a recess in the extraction body of the extraction machine.
  • FIG. 5 schematically represents an extraction installation with an extraction machine.
  • the extraction machine is connected to a plow chain via a resilient or damped traction carriage according to DE 10 2007 053 206 A1.
  • the extraction machine 500 is preferably an extraction plow for extracting coal in an underground longwall.
  • a plow chain 501 which is respectively deflected on a chain wheel 502 or 503 , is provided.
  • Both chain wheels 502 , 503 are mounted in drive or reversal stations (not shown further) and can preferably both be driven by means of a motor drive (likewise not shown).
  • the extraction machine 500 travels, as indicated by the arrow F, in the direction of travel towards the left towards the chain wheel 502 .
  • the chain strand section 501 A in the direction of travel in front of the extraction machine 500 therefore, forms the pulling chain strand section, and the chain strand section 501 B forms the rearward chain strand section.
  • Both chain strand sections 501 A, 501 B are fastened on a chain mount 505 , which is common here, which is formed rigidly on a traction carriage 530 .
  • the traction carriage 530 is arranged movably within limits in a recess 520 in a machine body 506 of the extraction machine 500 .
  • a spring 532 Within a traction carriage housing 531 , which is only schematically indicated here, there is arranged a spring 532 .
  • the spring 532 acts with both of its ends on plungers 533 , which can move relative to the traction carriage housing 531 against the restoring force of the spring 532 .
  • a schematically indicated working face 508 is worked with the extraction machine 500 , given a correspondingly high pre-tensioning of the spring 532 , which for this purpose can consist for example of a plate spring assembly, it can be ensured that a damping effect is achieved in the normal operational behaviour of an extraction machine.
  • the compression force of the spring 532 is for this purpose preferably greater than the tension force within the drive chain 501 , since otherwise, just by virtue of the usually present chain tension of the drive chain 501 between both chain wheels 502 , 503 , the traction carriage housing 531 would be displaced laterally within the recess 520 .
  • the traction carriage housing 531 would be displaced laterally within the recess 520 in such a way that the housing section of the traction carriage housing 531 , which is situated in each case towards the front in the direction of travel, would bear against the recess 520 and, in this respect, spring travel would no longer be available for the plunger 533 .
  • chain sag may occur in the rearward chain section 501 B, as indicated schematically in FIG. 5 and designated by reference sign 501 B′.
  • the resilience of the coupling device which is effective between traction carriage 530 and machine body 506 , makes it possible, during a change in the direction of travel but also during blockages or other unfavourable operating states, to prevent an impact-like mutual abutting of the contact surfaces between traction carriage and extraction machine from occurring.
  • the generic extraction installation with a corresponding traction carriage coupled via a resilient system has proved to be successful in underground mining, in particular in the extraction of coal, and has led to a considerable improvement in the service life and the operational behaviour of the extraction machine.
  • During operation of such an extraction installation with resilient coupling device with respect to an extraction installation with a rigidly connected plow chain or rigidly connected traction carriage it has moreover been shown that the vibrational behaviour of the pulling chain strand section is also improved.
  • the pulling chain strand section is also improved since the vibration amplitudes in extraction installations with extraction machines rigidly connected to the chain turn out to be substantially greater than in extraction installations with a resilient coupling device on the traction carriage. This reduction in the vibrations contributes to the reduction in the vibration loading of the chain and also of the chain locks.
  • Chain sag may occur in particular in that chain strand section, which, depending on the respective direction of travel of the extraction machine, is situated behind the extraction machine pulled by chain.
  • the prior art proposes tensionable drive or reversal stations by means of which the spacing of the two chain wheels from one another is changed, if appropriate also during active operation of the extraction machine, so as to counteract the occurrence of chain sag by the change of spacing.
  • sensor devices are arranged in the drive or reversal stations, by means of which sensor devices the chain state is detected, preferably both in the upper side and in the lower side of the chain, in order, depending on the chain state detected, either to change the speed of rotation of at least one drive motor or to change the extension state of a tensioning device in the drive or reversal stations, and as a result, to counteract the occurrence of chain sag or to avoid excessive chain tensions.
  • the present disclosure is directed, at least in part, to improving or overcoming one or more aspects of prior systems.
  • an extraction machine for an extraction installation including a chain with first and second chain ends at respective first and second chain strand sections, the first and second chain ends being connectable to the extraction machine for moving the extraction machine, may comprise a first chain mount configured to be connected to the first chain strand section.
  • the extraction machine may further comprise a second chain mount configured to be connected to the second chain strand section, and a first pre-tensioning device for building up a pre-tensioning force acting on the first chain mount such that a pulling force acts on the first chain strand section in the direction of the second chain mount.
  • an extraction installation for mineral extraction may comprise an extraction machine as exemplary disclosed herein.
  • a traction carriage for an extraction machine movable by means of a chain with first and second chain ends at respective first and second chain strand sections may comprise a traction carriage body configured to be inserted into a recess in the extraction machine, the traction carriage body being provided with a first chain mount to which the first chain strand section is connectable.
  • the traction carriage may further comprise a resilient device integrated into the traction carriage for both directions of movement.
  • the first chain mount may be subjected by means of a first pre-tensioning device to a pre-tensioning force such that a pulling force acts on a first chain strand section in the direction of the second chain mount.
  • an extraction installation for mineral extraction may comprise at least one extraction machine having a machine body, with a chain with two chain ends to which the extraction machine is connected via chain mounts, for moving the extraction machine, and with two chain wheels for driving and/or deflecting the chain into drive stations or deflection stations which receive the respective chain wheel.
  • Both chain mounts may be subjected by means of at least one pre-tensioning device to a pre-tensioning force which exerts, on the chain strand section of the chain connected to the respective chain mount, a pulling force in the direction of that chain wheel around which the chain strand section connected to the other chain mount is deflected.
  • an extraction machine for an extraction installation in particular as disclosed herein, may comprise a machine body and chain mounts to which a chain for moving the extraction machine can be connected. Both chain mounts may be subjected by means of at least one pre-tensioning device to a pre-tensioning force which exerts, on a chain strand section of the chain which can be connected or is connected to the respective chain mount, a pulling force in the direction of the other chain mount.
  • a traction carriage for an extraction machine as exemplary disclosed herein which can be moved back and forth by means of a chain, may comprise a traction carriage body which can be inserted into a recess in an extraction machine and which is provided with chain mounts to which a chain for moving the traction carriage body can be connected.
  • a resilient device for both directions of movement may be integrated into the traction carriage.
  • Both chain mounts on the traction carriage may be subjected by means of at least one pretensioning device to a pretensioning force which exerts, on a chain strand section of the chain which can be connected or is connected to the respective chain mount, a pulling force in the direction of the other chain mount.
  • FIG. 1 shows, in a schematically highly simplified form, an extraction installation according to the present disclosure together with an extraction machine with a pre-tensioning device according to a first exemplary embodiment
  • FIG. 2 shows an extraction installation together with an extraction machine with a pre-tensioning device according to a second exemplary embodiment
  • FIG. 3 shows an extraction installation together with an extraction machine with a pre-tensioning device according to a third exemplary embodiment
  • FIG. 4 shows an extraction installation together with an extraction machine with a traction carriage according to a further embodiment according to the present disclosure.
  • FIG. 5 shows an extraction installation together with an extraction machine according to the prior art according to DE 10 2007 053 206 A1.
  • FIG. 1 illustrates, in a schematically highly simplified form, an extraction installation 10 according to a first exemplary embodiment.
  • An extraction machine 50 is moved along a working face 18 to be worked by means of a drive chain 1 which is deflected on a first chain wheel 2 and a second chain wheel 3 .
  • Both chain wheels 2 , 3 are arranged within schematically indicated drive stations 15 which can be provided with drive motors (not shown) and, if appropriate, also with a tensioning device for changing the distance between the two chain wheels 2 , 3 .
  • the distance between both drive stations 15 may be, for example, 400 m and more, which leads to correspondingly high chain lengths of the drive chain 1 .
  • the extraction machine 50 moves in the direction of travel F towards the left-hand drive station 15 with the chain wheel 2 .
  • the chain strand section 1 A situated between the extraction machine 50 and the chain wheel 2 forms the pulling chain strand section and the chain strand section 1 B situated between the extraction machine 50 and the chain wheel 3 forms the rearward, non-pulling chain strand section.
  • the chain strand section 1 A is fastened on a first chain mount 8 on the extraction machine 50 and the chain strand section 1 B is fastened on a second chain mount 9 on the extraction machine 50 .
  • a pre-tensioning device 40 which here comprises at least one spring 41 , is provided between the two chain mounts 8 , 9 , which can each move on their own account relative to a machine body 6 of the extraction machine 50 .
  • Both chain mounts 8 , 9 may be guided movably on the machine body 6 in such a way that they can move substantially only parallel to the direction of travel F.
  • the spring 41 forms a tension spring, which pushes together the two chain mounts 8 , 9 , if the chain strand sections 1 A, 1 B are not connected, to a minimum distance from one another.
  • the machine-side chain mounts 8 , 9 are pulled apart while building up or increasing a pretension in the spring 40 .
  • the tensile force or spring force of the spring 41 of the pre-tensioning device 40 is preferably lower by, for example, a power of ten than the chain tensioning force between both chain wheels 2 , 3 that is normally introduced into the chain 1 .
  • the chain tensioning force between both chain wheels 2 , 3 may be, for example, approximately 500 kN.
  • the pre-tensioning force of the completely tensioned spring 41 within the pre-tensioning device 40 may then be, for example, 50 kN, even if these are only exemplary reference values.
  • the larger chain tractive force has the effect that both chain mounts 8 , 9 , as indicated by dot-dash line in FIG. 1 for the chain mount 9 , are pulled against two spaced-apart fixed mounts 11 and 12 on the machine body 6 , with the result that a correspondingly high pre-tensioning force is built up in the spring 41 .
  • the fixed mounts 12 , 13 limit the respective movement path of the chain mounts in the pulling direction of the respective pulling chain strand section 1 A or 1 B.
  • the chain tractive force both in the pulling chain strand section 1 A and in the rearward chain strand section 1 B is, owing to the chain tensioning force, greater than the pre-tensioning force of the spring 41 produced by pulling apart the chain mounts.
  • both chain mounts 8 , 9 are situated in direct contact with the fixed mounts 11 , 12 on the machine body 6 . If, however, chain sag occurs in the rearward chain strand section 1 B, as is indicated with the reference sign 1 B′ in FIG.
  • the chain tractive force in the chain strand section 1 B then falls, owing to the chain sag, below the pre-tensioning force of the spring 41 of the pre-tensioning device 40 , which here is directed from the chain mount 9 in the direction of the chain mount 8 or the chain wheel 2 pulling the chain strand section 1 A, with the result that the chain mount 9 moves in the direction of the chain wheel 2 or the respective other chain mount 8 with corrective tensioning of the chain sag 1 B′, without further measures having to be taken.
  • the pre-tensioning force of the pre-tensioning device 40 that acts between both chain mounts 8 , 9 is therefore virtually inertia-free and automatically correctively tensions chain sag over the movement path of the two chain mounts 8 , 9 with respect to one another if the chain sag state occurs.
  • FIG. 2 shows a second exemplary embodiment of an extraction installation 110 according to the present disclosure. Functionally identical components are provided with reference signs increased by 100.
  • the drive chain 101 runs around between two chain wheels 102 , 103 which are each mounted in drive stations 115 and are preferably provided with a separate motor drive.
  • the extraction machine 150 which is provided with suitable extracting tools in order to remove material on a working face 118 in both possible directions of travel, here comprises two machine bodies 106 A, 106 B, which are separated from one another and which, although having a suitably large distance from one another, are connected to one another substantially fixedly in terms of movement, as is indicated here via the coupling rod 135 .
  • the chain mount 108 situated at the front in the direction of travel in the representation according to FIG. 2 is situated on the machine body part 106 A, while the rearwardly situated chain mount 109 is correspondingly situated on the other machine body part 106 B.
  • the chain mount 108 to which the pulling chain strand 101 A is connected and also the chain mount 109 to which the rearward chain strand section 101 B is connected are in each case movable with respect to the associated machine body part 106 A, 106 B, wherein a first pre-tensioning device 140 A is arranged between the respective chain mount 108 and the machine body part 106 A and a second pre-tensioning device 140 B is arranged between the other machine body part 106 B and the chain mount 109 , via which pre-tensioning device a pre-tensioning force is introduced into the respective chain strand section 101 A or 101 B.
  • each pre-tensioning device 140 A or 140 B in each case comprises at least one spring 141 A or 141 B.
  • the chain mount 108 preferably bears against an end stop on the machine body part 106 A in which the spring 141 A is charged or loaded with the maximum value of its pre-tensioning force. The same applies in the normal operating state for the chain mount 109 , as indicated by dotted line in FIG. 2 .
  • the chain mount 108 is pre-tensioned by the spring force of the spring 141 A in the direction of the other chain mount 109 and the chain wheel 103 situated behind it and the chain mount 109 is correspondingly pre-tensioned towards the chain mount 108 and the chain wheel 102 .
  • This pre-tensioning force in each case counteracting the chain tractive force in both chain strand sections.
  • FIG. 3 schematically shows a third exemplary embodiment of an extraction installation 200 with a first chain wheel 202 and a second chain wheel 203 on which the drive chain 201 is deflected and correspondingly driven.
  • the extraction machine 215 has a first machine body part 206 A and a second machine body part 206 B.
  • the chain mount 208 is connected fixedly in terms of movement to the machine body part 206 A and the chain mount 209 is connected fixedly in terms of movement to the machine body part 206 B.
  • the pre-tensioning device 240 again comprises at least one spring 241 which is arranged either directly between the machine mounts 208 , 209 , as illustrated, but also could be effectively arranged between the machine body parts 206 A, 206 B in a suitable manner.
  • the movement path between both machine body parts 206 A, 206 B is preferably limited in such a way that the one machine body part 206 A rigidly pulls the other machine body part 206 B with it during the machine travel if the movement path is exhausted, and therefore a maximum predetermined spacing between both machine body parts is achieved.
  • the two machine body parts 206 A, 206 B have their maximum spacing from one another, as represented by the dotted representation of the machine body part 206 B in FIG. 3 . If, however, chain sag occurs in the rearward chain strand section 201 B, as indicated in FIG. 3 by 201 B′, the pre-tensioning force of the spring 241 then acts directly and the spacing between the two machine body parts 206 A, 206 B together with the spacing between the two chain mounts 208 , 209 is reduced in the rearward chain strand section in order to correctively tension the chain sag 201 B′.
  • the pre-tensioning force of the pre-tensioning device 240 is built up by the chain tension of the chain 201 , which pulls apart the two chain mounts 208 , 209 together with machine body parts 206 A, 206 B counter to the restoring force of the pre-tensioning device 240 .
  • FIG. 4 shows a fourth exemplary embodiment of an extraction installation 300 .
  • the extraction machine 350 is connected via a traction carriage 330 to the drive chain 301 which is deflected on the chain wheels 302 , 303 within the respective drive stations 315 .
  • the traction carriage 330 is seated movably in a recess 320 in the machine body 306 of the extraction machine 350 and is provided in a manner known per se with a resilient device 332 which acts on plungers 333 guided movably in the traction carriage housing 331 .
  • the device 332 here comprises a spring system which interacts with the plungers 333 and which ensures an elastic coupling of the traction carriage 330 in the recess 320 in the machine body.
  • the chain mount 308 for the pulling chain strand 301 A, when the extraction machine 350 moves in the direction of travel F, and the chain mount 309 for the rearward chain strand section 301 B are not directly arranged on the machine body 306 , but directly on the traction carriage housing 331 , as schematically indicated in FIG. 4 .
  • a first pre-tensioning device 340 A acts between the chain mount 308 and the traction carriage housing 331 and a second pre-tensioning device 340 B acts between the chain mount 309 and the traction carriage housing 331 , which pre-tensioning devices are functionally constructed here as in the exemplary embodiment according to FIG. 2 .
  • FIG. 4 shows the position of the chain mount 309 during corrective tensioning of chain sag since the spring 341 B, which is provided to apply a pre-tensioning force to the chain mount 309 , has moved the chain mount 309 , with corrective tensioning of the chain sag, away from a fixed mount 312 on the traction carriage housing 331 in the direction of the other chain mount 308 or the chain wheel 302 , which is pulling here. Therefore, by means of the path change of the chain mount 309 , the chain sag 301 B′, which otherwise occurs, as schematically indicated in FIG. 4 , is correctively tensioned. By contrast, on the pulling side, the chain mount 308 bears against the fixed mount 311 on the traction carriage housing 331 , for which reason the resilience of the device 332 (spring, plungers 333 ) can take effect in a conventional manner.
  • One object of the present disclosure is to improve the operational behaviour of an extraction installation or an extraction machine for such an extraction installation.
  • both chain mounts are biased by means of at least one pre-tensioning device to a pre-tensioning force which exerts, on the chain strand section of the chain connected to the respective chain mount, a tensile force in the direction of that chain wheel around which the chain strand section connected to the other chain mount is deflected.
  • both chain mounts are subjected by means of at least one pre-tensioning device to a pre-tensioning force which exerts, on a chain strand section of the chain which can be connected or is connected to the respective chain mount, a tensile force in the direction of the other chain mount.
  • the solution according to the present disclosure therefore makes provision, by means of the pre-tensioning device, for introducing into the chain strand sections on or via the chain mounts an additional pre-tensioning force, which causes a relative movement of the respective chain mount and which can act automatically in the event that a “chain sag” chain state could occur in order to reduce or avoid the chain sag by corrective tensioning via the pre-tensioning device introduced between the respective chain mount and chain strand section. Since in modern extraction installations the traction chain for the extraction machine is in any case clamped between the chain wheels, the pre-tensioning force of the pre-tensioning device may be built up at the same time by introducing the chain tension between the chain drives.
  • both chain mounts may be provided with their own pre-tensioning device for building up a pre-tensioning force.
  • the pre-tensioning devices may be in each case arranged between the machine body of the extraction machine and the associated chain mount and both chain mounts may be movable relative to the machine body.
  • the pre-tensioning device may have in particular springs which are positioned in such a way that the spring force of the tensioned pre-tensioning device counteracts the chain tractive force.
  • the drive train may be tensioned as usual by changing the spacing of the chain wheels from one another, this causes a positional change of the chain mounts relative to the machine body, while at the same time building up a pre-tensioning force or increasing (tensioning) the pre-tensioning force of the pre-tensioning device. If then the chain tractive force during operation within the rearward, non-pulling chain strand section on the non-pulling side of the extraction machine falls below the pre-tensioning force of the pre-tensioning device, it may act with corrective tensioning of the chain sag until force equilibrium prevails again.
  • the extraction machine may have a machine body with at least two machine body parts which are arranged at a distance from one another and connected to one another fixedly in terms of movement, wherein in each case one of the chain mounts may be arranged on one of the two machine body parts, can be moved relative to the associated machine body part and may be provided with its own pre-tensioning device for building up a pre-tensioning force, which acts between the respective chain mount and the associated machine body part.
  • the chain mounts may be guided movably in guides on the machine body parallel to the direction of movement of the extraction machine.
  • the extraction machine may have two machine body parts which can be moved relative to one another and which can be varied in their distance from one another, wherein the pre-tensioning device acts and may be arranged between the two machine body parts, which can be moved with respect to one another. It is particularly advantageous here, if by varying the distance, a restoring force may be built up or is built up in the pre-tensioning device and/or in a separate restoring device for the machine body parts.
  • the solution according to the present disclosure may be particularly advantageous if the machine body of the extraction machine may be indirectly connected to the chain via a traction carriage.
  • the traction carriage may be provided with a resilient, in particular elastically resilient, device for both directions of movement of the extraction machine and may be inserted into a recess in the machine body.
  • Both chain mounts together with pre-tensioning device(s) may be arranged on the traction carriage provided with the preferably elastically resilient device.
  • resonant vibrations in the rearward chain strand section may be prevented when switching the motors on or off, and the pre-tensioning device may cause a change in position of the respective chain mount and thus a change in length of the chain strand section is also counteracted.
  • either both chain mounts may be provided with their own pre-tensioning device for building up a pre-tensioning force, wherein the pre-tensioning devices may be in each case arranged between a traction carriage housing and the associated chain mount. Both chain mounts can be moved relative to the traction carriage housing.
  • a common pre-tensioning device for building up a pre-tensioning force may be arranged between the two chain mounts, wherein both chain mounts can be moved relative to a traction carriage housing.
  • the chain mounts may be guided movably in guides on the traction carriage housing, which are arranged so as to be oriented parallel to the direction of movement of the extraction machine.
  • the pre-tensioning device may comprise at least one spring and, if appropriate, for the pre-tensioning force of this spring to be built up by a change in position of the two chain mounts relative to one another.
  • the adjustment travel of the chain mounts, in particular when correctively tensioning chain sag, may be detected, if appropriate, and may be used for installation control or drive control.
  • the above object may also achieved by a traction carriage for an extraction machine, which can be moved back and forth by means of a chain.
  • the traction carriage may comprise a traction carriage body, which can be inserted into a recess in the extraction machine and which is provided with chain mounts to which a chain for moving the traction carriage body can be connected.
  • a resilient device for both directions of movement may be integrated into the traction carriage, which device preferably may ensure an elastic coupling of the traction carriage and hence of the plow chain to the plow body, wherein it may be provided according to the present disclosure that both chain mounts on the traction carriage are subjected by means of at least one pre-tensioning device to a pre-tensioning force.
  • the pre-tensioning force exerts, on a chain strand section of the chain which can be connected or is connected to the respective chain mount, a tensile force (pulling force) in the direction of the other chain mount.
  • Each pre-tensioning device may also have a plurality of springs or other devices for applying a pre-tensioning force.
  • the resilient device in the traction carriage preferably comprises springs or spring systems such as a plate spring assembly in order to be able to withstand the high forces, which may occur.
  • springs or spring systems such as a plate spring assembly in order to be able to withstand the high forces, which may occur.
  • elastic (damping) systems with springs it could also be possible to use purely hydraulic or pneumatic damping systems or combination systems with springs.
  • One of the stations receiving the chain wheel may also form a driveless, preferably tensionable reversal station.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)
  • Harvesting Machines For Root Crops (AREA)
US14/442,002 2012-11-16 2013-11-14 Extraction installation for mineral extraction Abandoned US20150275664A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202012104441.2 2012-11-16
DE202012104441.2U DE202012104441U1 (de) 2012-11-16 2012-11-16 Gewinnungsanlage für die Mineraliengewinnung, Gewinnungsmaschine und Zugschlitten hierfür
PCT/EP2013/003439 WO2014075806A2 (en) 2012-11-16 2013-11-14 Extraction installation for mineral extraction

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US20150275664A1 true US20150275664A1 (en) 2015-10-01

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US14/442,002 Abandoned US20150275664A1 (en) 2012-11-16 2013-11-14 Extraction installation for mineral extraction

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US (1) US20150275664A1 (zh)
CN (1) CN104769218A (zh)
DE (2) DE202012104441U1 (zh)
WO (1) WO2014075806A2 (zh)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
RU2800222C1 (ru) * 2019-06-18 2023-07-19 Тиле Гмбх Унд Ко. Кг Измерение усилия натяжения цепи в цепных транспортерах
US11731839B2 (en) 2019-06-18 2023-08-22 Thiele Gmbh & Co. Kg Measuring a chain force on chain conveyors

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CN104769218A (zh) 2015-07-08

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