Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21C—MINING OR QUARRYING
  • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
  • E21C35/08—Guiding the machine
  • E21C35/12—Guiding the machine along a conveyor for the cut material
  • E21C35/125—Means for inclining the conveyor

Definitions

• the invention relates to a height control system for a coal planing system for level control of a Schwerthobels according to the features in the preamble of claim 1 and a coal planing machine.
• a coal planer is a mechanical extraction device on a chain scraper conveyor that recovers the coal.
• the coal planer is pressed against the coal thrust and pulled by chains on this back and forth.
• the plane body of the plane is occupied with chisels and dissolves with these the coal from the mountain range.
• the coal recovered in this way is loaded into the chain scraper conveyor and conveyed away by sliding surfaces attached to the chain and the planer.
• the coal planer is integrated in a longwall system, which is essentially the planer itself, the planing chains, the longwall conveyor with attachments, the pressure and return device for the longwall conveyor, the device for controlling the position of the longwall conveyor relative to the horizontal, the drive stations for the coal planer and the longwall conveyor and the longwall construction and other components.
• a longwall construction is usually a shield extension used.
• the predominantly used planing types can be divided into two categories, namely coal planer with sword plate and with displacement side forced guidance of the planer chain in a planing chain guide and coal planer without a sword and with coal-side forced guidance of the planer chain.
• the present invention relates to coal slicer with sword or sword plate, so-called Schwerthobel.
• the sword plate engages under the conveyor and serves to stabilize the coal planer in relation to its position to the longwall conveyor. So that the sword plate can be adapted to wavy lying ends, this is usually executed in several parts.
• the plow chain by means of which the sword putter is pulled along the coal puddle through the strut, is guided on the side of the scraper chain guides on the scraper conveyor. This favors the monitoring, maintenance and possible repairs of the chain, as it is safe and easily accessible from the field.
• Further advantages of the Schwerthobels lie in the stable and tilt-safe guidance of the coal planer and in the good controllability of the recovery plant in the seaming horizon.
• the coal planer must be guided and steered so that the coal seam can be won in according to plan.
• the planer or height control of the coal planer is done by adjusting the bottom chisel of the coal planer (direct control) and by means of hydraulic adjusting cylinders, which are mounted on the offset side of the longwall conveyor (indirect control).
• the height control is necessary to keep the coal planer at the desired cutting level.
• the height control of a coal planing machine in the seaming horizon should ensure that the planer is the seam Clean up to the beach loosely, without leaving coal (to climb) or to cut into the lying down (to dive). Influencing factors on the cutting height position or the cutting horizon of a coal planer are its weight, the achieved cutting depth of the ground bit and the amount and direction of the pressure forces.
• the most common indirect planer controls include the so-called boom control.
• This has a displacement side on the conveyor or an attachment of the same arranged hydraulic actuating cylinder and a displacement side in the pedestrian expansion supported boom linkage or a push bar, which also serves to advance the longwall conveyor.
• the push bar is coupled to the conveyor or an attachment of the conveyor via a push beam joint.
• the actuating cylinder also connects the chains kratzerforderer or an attachment to the conveyor trough of the chain scraper conveyor and the push bar, wherein the actuating cylinder is mounted in a lower connection joint on the push bar and in an upper connection joint on the attachment.
• the push beam joint and the lower connection joint and the upper connection joint thus form a three-jointed joint.
• Such as boom control referred to control devices are known in various designs.
• the prior art includes the height control systems described in DE 23 19 910 A1 or DE 42 00 897 A1 for level control of coal planing.
• DE 39 13 121 A1 discloses a device for level control of a Schwerthobelstrom.
• Schwerthobel or Schwerthobel plants are used in particular for low-grade coal seams with a thickness of less than 1.5 m, in particular because in Schwerthobelanlagen the pull chain can not be performed on the coal side of the chain scraper conveyor, but as described above offset or mounting side. This facilitates the necessary accessibility during repair work.
• the connection of the planer body, which moves on the coal side of the chain scraper conveyor, to the plow chain is made through the sword plate under the conveyor.
• the Schwerthobel engages under the chain scraper conveyor with his sword plate.
• the sword plate engages with stop blocks in an offset side on the chain scraper conveyor arranged planing chain guide.
• the planing chain guide forms an offset-side attachment of the chain scraper conveyor on which the actuating cylinder of the boom control is articulated.
• the Schwerthobel stands on the front bottom chisel and is on the offset side of the chain scraper conveyor raised in the range of Dreigelenks. Through this hub anyway already very low driving field in which miners can reside, further narrowed, making it difficult to work, but in particular the risk of accidents is increased.
• the inclined Schwerthobel with his sword plate is then not flat on the footwall, but on the lower chisel tip or the tip of the ground chisel. The tips of the ground chisel are thereby heavily loaded. If the lying is different hard, then the chisel penetrates sometimes more, sometimes less in the lying one. As a result, the Schwerthobel from the control behavior is unstable and can leave the set cutting horizon unpredictable. This requires a constant countermeasure. The success of altitude control then depends heavily on the experience and skill of the helm crew, but, as mentioned, must act in the cramped field of the longwall system.
• the invention is therefore, starting from the prior art, based on the object to improve a height control system for a coal planing system for level control of a Schwerthobels for practical use and safety.
• Claim 5 is directed to a coal planing system with a height control system according to the invention for a Schwerthobel.
• the height control system according to the invention is used for level control of the cutting horizon of a Schwerthobels.
• the Schwerthobel is guided by a chain scraper conveyor and, with its sword plate, grips under the chains of the scraper conveyor or the conveyor channels of the chain scraper conveyor.
• a push beam is supported in a walking extension, which is articulated with its conveyor-side beam head via a sliding beam joint on an attachment of the chain scraper conveyor.
• Attachments of the chain scraper conveyor are in particular the Planer chain guide or covers of the chain channels and lateral braces.
• a positioning cylinder is also arranged, which extends between the push bar and the attachment.
• the actuating cylinder is mounted in a lower connection joint on the push bar and in an upper connection joint on the attachment, so that the push beam joint and the lower connection joint and the upper connection joint form a Dreigelenk such that the chain scraper conveyor is tilted by the actuating cylinder.
• a game is provided in one of the joints of the Dreigelenks.
• the game is dimensioned so that an emerging during planing stroke of the chain scraper conveyor at least partially, preferably completely compensated.
• the game is dimensioned so that the chain scratch conveyor during planing passage relative to the push bar can be raised by the stroke, preferably by a measure which corresponds at least to the thickness of the sword plate, but the push bar remains vertically stable during the lifting of the chain scratch conveyor.
• the planing control mechanism has the game generated by constructive action.
• the game is formed by a slot.
• the slot is arranged in the push beam joint.
• the push beam joint comprises at least one elongated hole in which the hinge pin is received limited movable.
• the inventively provided game in the push beam joint allows the conveyor trough with plow guide a lifting movement during planing passage, without raising the push bar of the expansion and narrow the field in this area adversely.
• the game is just sized to lift the conveyor trough with the planing guide of the passing Schwerthobel. From then on, the movement is limited.
• the limitation ensures that the controller can again exert forces on the planer. Thus, the height control is not disabled.
• the slot allows a defined, limited game in the sliding beam joint.
• the movement when lifting the chain scraper conveyor can necessarily be done quickly.
• the invention fulfills the requirements placed on the height control system and the slicer in a special way:
• the scraper can be moved quickly along the chain scraper conveyor and thereby lift the conveyor troughs, without lifting the push bar at this hub.
• the sword plane stands upright and flat on its sword plate and thus has a stable cutting behavior.
• the tips of the ground chisels are relieved.
• the game according to the invention is sufficiently dimensioned for a rapid gutter lift without disadvantageous increase of the push beam and / or a disadvantageous reduction of the cross section of the traffic pan.
• the control function of the height control system is maintained.
• a defined limited game is planned incorporated in the range of motion of the planer control by design measures, so as to allow the necessary stroke movement of the chain scraper conveyor or the chutes with active control.
• FIG. 1 shows a cross section through a strut with a longwall equipment according to the prior art
• FIG. 2 shows the coal planing machine according to the representation of FIG. 1 during the passage of a heavy-duty screen
• Figure 3 shows a cross section through a strut with a coal planing system with inventive height control system
• FIG. 4 shows a section from FIG. 1 with the enlarged view of FIG
• Figures 1 and 2 show a cross section through a strut with a longwall equipment according to the prior art.
• a longwall is a long, narrow excavation space bordered by a coal seam on one side of the existing deposit and on the other side by the so-called Old Man, the staggered or fractured mine.
• the height of the longwall usually corresponds to the thickness of the seam to be removed.
• the longwall equipment comprises a walking extension in the form of hydraulic shield removal 1.
• the shield construction 1 consists essentially of horizontal runner 2, offset or breakage plate 3 and the Hangendschild 4 and interposed between hydraulic rams 5 together with handlebars 6 and 7 knobs.
• the coal K in the coal seam is recovered by means of a coal planing machine.
• This comprises a chain formed by conveyor channels 8 scraper conveyor 9 and a kohlenfound materi on the chain scraper conveyor 9 guided Schwerthobel 10.
• the Schwerthobel 10 has a planing with chisel 1 1 occupied planing body 12 and a bottom plate arranged sword plate 13.
• the sword plate 13 engages under the chains scratch conveyor 9.
• a plow chain guide 14 is mounted, which forms an attachment of the chain scraper requestor 9.
• the planing chain guide 14 has two superimposed chain channels 15, 16 for the plow chain 17.
• the sword plate 13 engages with stop block 18 in the lower chain channel 15 and is here connected to the plow chain 17.
• a boom control 19 is provided for height control of the cutting level of Schwerthobels 10.
• This has a displacement side supported in the shield construction 1 push bar 20.
• the push bar is with its conveyor side Beam head 21 articulated via a sliding beam joint A on the plow chain guide 14.
• the push bar 20 is articulated on the offset side joint D.
• Offset side of the chain scraper requestor 9 is further arranged an actuating cylinder 22.
• the adjusting cylinder 22 extends above the push beam joint A between the push bar 20 and the plow chain guide 14. It is mounted in a lower connecting joint C on the push bar 20 and in an upper connecting joint B on the plow chain guide 14.
• the push beam joint A, the upper connection joint B and the lower joint joint C form a three-jointed such that the chain scratch conveyor 9 is tilted by actuation of the actuating cylinder 22 in a bank-level plane.
• the adjusting cylinder 22 of the conveyor channels 8 existing gutter strand of the chain scratching requestor 9 and thus the guideway of the Schwerthobels 10 can be raised or lowered.
• the advantage here is that the rear support of the push rod 20 in the shield construction 1 in the joint D forms the fulcrum for the tilting movement of the coal planing machine.
• Figure 1 shows the chain scratch conveyor 9 in its usual normal position.
• the conveyor chute 8 with planer guide 23 rests with the front edge on the L lying down.
• FIG. 3 shows the coal planing system with a height control system according to the invention. Identical or mutually corresponding components of the longwall equipment are provided with the same reference numerals as in Figures 1 and 2.
• FIG 4 shows an enlarged detail of the height control system, in which the connection region of the push beam 20 on the chain scraper request 9 and the plow chain guide 14 is shown enlarged.
• the push beam joint A, the upper connection joint B and the lower connection joint form a Dreigelenk such that the chain scratch requestor 9 by actuation of the actuating cylinder 22 is tilted.
• a game S is provided in the three joints formed by the joints A, B, C. The game S is such that the resulting during planing stroke H of the chain scratch requestor 9 is at least partially compensated.
• the game S is such that at a passage of Schwerthobels 10 9 of the chains kratzerforderer relative to the push bar 20 can be raised by the stroke H, wherein the push bar 20 during the lifting of the chain scraper request 9 remains stable in position and is not raised.
• the game S is structurally integrated into the three-jointed steering and through a slot 24 which is arranged in the push beam joint A.
• the arrow P illustrates the movement that the chain scraper conveyor 9 or the plow chain guide 14 can perform relative to the push bar 20 during the passage of the screed 10, without the push bar 20 being raised.
• the Schwerthobel 10 can quickly slide along the gutter and the conveyor chute 8 and the chains kratzerforderer 9 lift, without doing the push bar 20th to raise. It can be seen further in FIG. 3 that the sword planer 10 stands upright and flat on its sword plate 13. As a result, the sword planer 10 has a stable cutting behavior. The tips of the bottom chisel 25 are relieved. The game S in the three-jointed is limited and dimensioned so that the conveyor trough 8 can be raised with the planer guide of the continuous Schwerthobel 10. The hinge pin 26 of the push beam joint A then comes at the lower end of the slot 24 in its final position. The game S is exhausted and the controller can exert the necessary forces on the sword table 10 at full function.
• the game S in the three-jointed allows a mechanical decoupling between the chain scraper conveyor 9 and the push bar 20 by a limited amount, whereby the stroke H is compensated in the connection area.
• the Schwerthobel 10 can quickly slide along the 9 existing gutters of the conveyor channels 8 of the chain scraper conveyor 9 along and thereby raise the conveyor trough 8 by his sword plate 13, without lifting the push bar 20. It is particularly advantageous that the sword planer 10 stands upright and flat on the sword plate 13. This allows a stable cutting behavior and a relief of the bottom chisel 25th

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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)
• Framework For Endless Conveyors (AREA)
• Structure Of Belt Conveyors (AREA)
• Branching, Merging, And Special Transfer Between Conveyors (AREA)
• Screw Conveyors (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=48170391

Family Applications (1)

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• 2012
  • 2012-03-22 DE DE201210102458 patent/DE102012102458B3/de not_active Expired - Fee Related
• 2013
  • 2013-03-21 UA UAA201411481A patent/UA110004C2/ru unknown
  • 2013-03-21 EP EP13718099.8A patent/EP2828481A2/de not_active Withdrawn
  • 2013-03-21 CN CN201380014903.9A patent/CN104204408A/zh active Pending
  • 2013-03-21 RU RU2014142544A patent/RU2014142544A/ru unknown
  • 2013-03-21 WO PCT/DE2013/100109 patent/WO2013139334A2/de active Application Filing

Non-Patent Citations (1)

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