EP0007554A1 - Device for maintaining the tension in a tow cable - Google Patents

Device for maintaining the tension in a tow cable Download PDF

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Publication number
EP0007554A1
EP0007554A1 EP79102488A EP79102488A EP0007554A1 EP 0007554 A1 EP0007554 A1 EP 0007554A1 EP 79102488 A EP79102488 A EP 79102488A EP 79102488 A EP79102488 A EP 79102488A EP 0007554 A1 EP0007554 A1 EP 0007554A1
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EP
European Patent Office
Prior art keywords
winch
tension
tensioning
cable
force
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Granted
Application number
EP79102488A
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German (de)
French (fr)
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EP0007554B1 (en
Inventor
Walter Port
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Priority to AT79102488T priority Critical patent/ATE1575T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/04—Distributing means for power supply in mines
    • E21F17/06—Distributing electric power; Cable networks; Conduits for cables

Definitions

  • the invention relates to a device for tensioning a traction rope, which is connected to an object that can change position independently of the rope force, in particular for indirectly tensioning an electric cable leading to a reciprocating coal-mining machine.
  • the problem underlying the invention has arisen from the need for energy - Or to lead other lines to a mobile work machine via an aid via which the lines are held in a defined position so that they cannot be run over by the portable work machine.
  • the most common tool to solve this problem is the cable drag chain.
  • it is expensive and cannot be used for any length of movement of a work machine.
  • the invention has for its object to provide a device for holding a pull rope with which the tension in the pull rope can be kept largely constant, which has the effect that when pulling the pull rope at a moving point to which the pull rope is connected there is no counter torque to be overcome on a rewinder.
  • the solution to this problem consists of a controllable and reversible driven winch, set up for the continuous delivery of a torque and thus a continuous pulling force in the pulling rope, with a drum for receiving one end of the pulling rope, and a tensioning device for exerting a counter-tensioning force in the pulling rope with one depending the tension in the traction rope movable element, which is acted upon by a sustainable spring force determining a desired tension, which is dimensioned so large that the movable element is in equilibrium when the continuous tensile force of the winch is equal to the desired counter-tensioning force exerted by the tensioning device, and from a control for regulating the winch as a function of changes in position of the movable element of the tensioning device in the sense and extent that the movable element is returned to the equilibrium position.
  • the device according to the invention with a winch for winding and unwinding the pull rope which can also be the power line itself, can be referred to as a "winch winch" which is actuated via a control device as a function of deviations from a desired tension within the pull rope becomes. It is controlled in the sense of winding up when the target tension in the pull rope drops because a reference point is approaching the winch, or vice versa.
  • the constant tension that can be adjusted in this way in the pulling rope under the forthcoming continuous torque of the winch prevents intermittent tensile loads at the connection points and the introduction of energy or other lines into the portable working machine, since every impact from the movable element of the tensioning device is caught.
  • the invention also encompasses an area of application in which the end of the traction cable is fixed and the device itself can be moved.
  • the cases are considered where a cable comes off a ship, that the tension should be kept constant under the ship's movements in the vertical and / or horizontal direction, for example when laying cables or when the ship is at anchor.
  • Cases are also conceivable in which the tension of a rope originating from a helicopter in the air is to be kept constant, for example if several helicopters are used to carry heavy loads. So far, complicated electronic helicopter controls have been used for this.
  • a particularly recommendable special solution according to the invention is that the winch is a commercially available compressed air-operated tractor reel with a hand lever that can be controlled from a middle stop position for forward and reverse gear, on which a linkage following the changes in position of the movable element of the tensioning device acts,
  • the movable element of the tensioning device for generating the counter-tensioning force in the rope is expediently a tensioning roller over which the pull rope is guided, the tensioning roller being arranged on the short lever arm of a balance beam, to the longer lever arm of which a tension spring and an actuating rod leading to the hand lever of the winch are connected are.
  • the equilibrium position of the tensioning roller is set when the spring force holds the balance beam and, via the actuating rod, the hand lever of the winch in such a way that the moment of tensioning force on the tensioning roller and short lever arm equals the moment of spring force and the longer lever arm, below which the spring engages on the balance beam are the same.
  • the lever arm ratio and / or the spring force can be changed to set the desired target tension in the pull rope.
  • the change in position of the movable is useful Element or the tension roller limited by stops, which are assigned switching positions of the control of the winch, in which the winch is fully switched on. If, for example, a rapid deflection of the object on which the traction rope ultimately engages results in a strong deflection of the movable element or the tensioning pulley, the winch is fully switched on in a stop position to allow the traction rope to run off or to be brought in.
  • the device according to the invention is always to be installed in the most favorable place in adaptation to local conditions.
  • the device according to the invention does not require anything other than the energy supply for the winch.
  • further energy-carrying connections, as well as any type of cable or flexible lines can be kept taut with a simple rope and the deflection roller.
  • the pulley only the pulley to be chosen accordingly, with the possibility of a multiple To be provided for various flexible lines, all of which carry the same moving object. It is advisable to adapt to different diameters of the different lines To provide pulleys of different diameters the running lengths of lines when the position of the multiple deflection roller changes and thus the tensions between them remain as constant as possible.
  • a mobile coal extraction machine 1 located on site, from which a power cable 2 is connected, which is connected to a fixedly arranged switch box 3.
  • This power cable 2 is to be kept taut under the driving movements of the coal mining machine 1 by means of the "winch winch" 4 according to the invention, so that it cannot be run over by the coal mining machine.
  • the power cable 2 is guided to the switch box 3 via a deflecting roller 5, the deflecting roller 5 is the end point of a traction cable 6 which leads to the winch according to the invention, the power cable 2 is thus held indirectly tensioned via the traction cable 6.
  • the deflection roller 5 When the coal mining machine 1 is moved to the left, the deflection roller 5 follows into the end position 5 'shown in dashed lines.
  • the maximum adjustment path S of the deflection 5 is half of the maximum displacement path of the coal extraction machine 1 to the left.
  • the "winch winch” according to the invention according to FIGS. 2 and 3 initially comprises a base plate 8 with a commercially available compressed air-operated tractor reel 9 fastened thereon, the hand lever 10 of which is in a horizontal middle stop position in FIG. 3.
  • This hand lever is adjustable in the two dash-dotted pivot positions for forward and reverse gear, so that the tractor reel 9 is reversible and equipped with a controllable drive.
  • the traction cable 6, which leads to the axis of the deflection roller 5, is wound onto the drum 9a of the tractor reel 9 (Fig. 1).
  • the traction cable 6 runs over a tension roller 11 that changes its position, from which the control for the hand lever 10 of the tractor reel 9 is actuated.
  • the tensioning roller 11 is arranged on the short lever arm 12a of a balance beam 12, to the longer lever arm 12b of which a tension spring 13 and an actuating rod 14 leading to the hand lever 10 are connected.
  • the balance beam 12 is pivotally mounted about the axis of rotation 15 of a fork 16, which is connected to the base plate 8 via a support 17.
  • the tension roller 11 is articulated via a double bracket 18 at the end of the short lever arm 12a of the balance beam 12. In Fig. 3, this double strap 18 extends partially behind the fork 16 shown in section.
  • the lever ratios of the balance beam 12 and the force of the spring 13 are dimensioned such that the tensioning roller 11, which is movably guided against the spring force, is in balance under the desired tensioning force acting on the rope.
  • the tensioning force acting on the rope 6 is generated by the torque of the tractor reel 9. If, for example, the lever ratio between the short lever arm 12a corresponding to the distance between the articulation points 15-19 and the long lever arm 12b corresponding to the distance between the articulation points 16-20 is equal to 1: 3, the balance beam 12 is then in the equilibrium state when there is a spring force a force of 660 N, for example of 2000 N, acts on the tensioning roller 11. This tensioning force should correspond to the desired tension in the rope 6.
  • the length of the actuating rod is dimensioned such that the hand lever 10 is pivoted somewhat in relation to the central stop position in the sense that the tractor reel 9 constantly applies the torque which is necessary in order to attach the balance beam 12 to the joint member 19 to allow a force of 666 N to act on the tension pulley 11
  • the pulling power of the tractor reel must be sufficient be higher than the target force of 660 N.
  • the balance beam 12 moves in the direction of the dot-dash pivot position when the tensioning force in the rope is increased.
  • the handle 10 is adjusted via the actuating rod 14 to return the tractor reel 9, ie the cable drum 9a allows the cable to run off.
  • the tensioning roller 11 resets under the force of the spring until the equilibrium state on the balance beam or the desired tensioning force in the rope 6 are restored.
  • the hand lever 10 is then again in the position which corresponds to the desired tensioning force in the rope when the deflection roller 5 is at rest.
  • the winch rests on a platform which can be moved back and forth in the direction of the pulling rope and on which the tensioning device acts.
  • the drum of the winch is itself the movable element of the tensioning device.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Ropes Or Cables (AREA)

Abstract

An apparatus for maintaining tension on a tension cable which is wound on the drum of a winch and connected at one end to a position varying object, especially for maintaining the tension of a power cable leading to a travelling coal extraction machine. The winch, preferably a conventional pressure drive operated hauling coiler can be regulated and driven reversibly and it can produce also at stand-still a continuous rotary moment. A tensioning device having a tensioning pulley 11 is also provided and is subjected to the force of the spring 14, the tension cable 6 being guided around the pulley 11 so that over the spring force a desired nominal tension can be set on the tension cable. Position changes of the tension pulley produce over an actuating linkage 14 a control of the winch so that the tension pulley returns into the original equilibrium position. This control process may be accompanied by running the cable off the winch or hauling it in. Instead of the tension pulley 11 the tension device can comprise also another movable element for example the drum 9a of the winch 9 when the winch is to be guided movably as a whole against the spring force.

Description

Die Erfindung betrifft eine Vorrichtung zum Gespannthalten eines Zugseiles, das an einem unabhängig von der Seilkraft lageveränderlichen Gegenstand angeschlossen ist, insbesondere zum mittelbaren Gespannthalten eines zu einer hin- und herfahrbaren Kohlegewinnungsmaschine führenden Stromkabels, Das der Erfindung zugrunde liegende Problem ist aus der Notwendigkeit erwachsen, Energie- oder andere Leitungen an eine bewegliche Arbeitsmaschine über ein Hilfsmittel zu führen, über das die Leitungen in einer definierten Lage gehalten werden, damit sie von der ortsbeweglichen Arbeitsmaschine nicht überfahren werden können. Das meistgebräuchliche Hilfsmittel zur Lösung dieses Problems ist die Kabelschleppkette. Sie ist jedoch kostspielig und nicht für beliebig lange Fahrbewegungen einer Arbeitsmaschine verwendbar. Es gibt auch Kabeltrommeln mit anstehendem Drehmoment zum Gespannthalten eines Kabels, jedoch muß beim Abrollen des Kabels das Gegenmoment überwunden werden, wodurch die Spannung in dem Kabel ansteigt.The invention relates to a device for tensioning a traction rope, which is connected to an object that can change position independently of the rope force, in particular for indirectly tensioning an electric cable leading to a reciprocating coal-mining machine. The problem underlying the invention has arisen from the need for energy - Or to lead other lines to a mobile work machine via an aid via which the lines are held in a defined position so that they cannot be run over by the portable work machine. The most common tool to solve this problem is the cable drag chain. However, it is expensive and cannot be used for any length of movement of a work machine. There are also cable drums with pending torque to keep a cable taut, but when the cable is unrolled, the counter-torque must be overcome, which increases the tension in the cable.

Die Erfindung hat sich die Aufgabe gestellt, eine Vorrichtung zum Gespannhalten eines Zugseiles zu schaffen, mit der die Spannung im Zugseil weitgehend konstant gehalten werden kann, was sich dahingehend auswirkt, daß beim Abziehen des Zugseiles bei einem sich entfernenden Punkt, an den das Zugseil angeschlossen ist kein anstehendes Gegenmoment an einer Aufwickelvorrichtung überwunden werden muß.The invention has for its object to provide a device for holding a pull rope with which the tension in the pull rope can be kept largely constant, which has the effect that when pulling the pull rope at a moving point to which the pull rope is connected there is no counter torque to be overcome on a rewinder.

Die Lösung dieser Aufgabe besteht aus einer regelbar und reversierbar angetriebenen Winde, eingerichtet zur kontinuierlichen Abgabe eines Drehmomentes und somit einer kontinuierlichen Zugkraft im Zugseil, mit einer Trommel zur Aufnahme eines Endes des Zugseiles, aus einer Spannvorrichtung zur Ausübung einer Gegenspannkraft im Zugseil mit einem in Abhängigkeit von der Spannung im Zugseil beweglichen Element, an dem eine eine gewünschte Spannung bestimmende nachhaltige Federkraft angreift, die so groß bemessen ist, daß das bewegliche Element in Gleichgewichtslage ist, wenn die kontinuierliche Zugkraft der Winde gleich der von der Spannvorrichtung ausgeübten gewünschten Gegenspannkraft ist, und aus einer Steuerung zum Regeln der Winde in Abhängigkeit von Lageänderungen des beweglichen Elementes der Spannvorrichtung in dem Sinne und Ausmaß, daß das bewegliche Element in die Gleichgewichtslage zurückgestellt wird.The solution to this problem consists of a controllable and reversible driven winch, set up for the continuous delivery of a torque and thus a continuous pulling force in the pulling rope, with a drum for receiving one end of the pulling rope, and a tensioning device for exerting a counter-tensioning force in the pulling rope with one depending the tension in the traction rope movable element, which is acted upon by a sustainable spring force determining a desired tension, which is dimensioned so large that the movable element is in equilibrium when the continuous tensile force of the winch is equal to the desired counter-tensioning force exerted by the tensioning device, and from a control for regulating the winch as a function of changes in position of the movable element of the tensioning device in the sense and extent that the movable element is returned to the equilibrium position.

Die Vorrichtung gemäß der Erfindung mit einer Winde zum Auf- und Abwickeln des Zugseiles, das auch die Energieleitung selbst sein kann, kann als eine "Rafferwinde" bezeichnet werden, die über eine Steuervorrichtung in Abhängigkeit von Abweichungen von einer Soll-Spannung innerhalb des Zugseiles betätigt wird. Sie wird im Sinne des Aufwickelns gesteuert, wenn die Soll-Spannung im Zugseil sinkt, weil sich ein Bezugspunkt der Winde nähert, oder umgekehrt. Die konstante Spannung, die auf diese Weise in dem Zugseil unter dem anstehenden kontinuierlichen Drehmoment der Winde eingestellt werden kann, verhindert stoßweise Zugbelastungen an den Anschlußstellen und Einführungen von Energie- oder anderen Leitungen in die ortsbewegliche Arbeitsmaschine, da jeder Stoß von dem beweglichen Element der Spannvorrichtung aufgefangen wird.The device according to the invention with a winch for winding and unwinding the pull rope, which can also be the power line itself, can be referred to as a "winch winch" which is actuated via a control device as a function of deviations from a desired tension within the pull rope becomes. It is controlled in the sense of winding up when the target tension in the pull rope drops because a reference point is approaching the winch, or vice versa. The constant tension that can be adjusted in this way in the pulling rope under the forthcoming continuous torque of the winch prevents intermittent tensile loads at the connection points and the introduction of energy or other lines into the portable working machine, since every impact from the movable element of the tensioning device is caught.

Von der Erfindung wird auch ein Anwendungsbereich umfaßt, in dem das Ende des Zugseiles festgelegt ist und die Vorrichtung selbst ortsbeweglich. Hierbei ist beispielsweise an die Fälle gedacht, wo von einem Schiff ein Kabel abgeht, das unter den Schiffsbewegungen in senkrechter und/oder waagerechter Richtung in seiner Spannung konstant gehalten werden soll, beispielsweise beim Verlegen von Kabeln oder wenn das Schiff vor Anker liegt. Auch sind Fälle denkbar, bei denen die Spannung eines von einem in der Luft befindlichen Hubschraubers ausgehenden Seiles konstant gehalten werden soll, beispielsweise wenn mehrere Hubschrauber zum Tragen schwerer Lasten eingesetzt werden. Bisher hat man hierfür komplizierte elektronische Hubschrauber-Steuerungen eingesetzt.The invention also encompasses an area of application in which the end of the traction cable is fixed and the device itself can be moved. Here, for example, the cases are considered where a cable comes off a ship, that the tension should be kept constant under the ship's movements in the vertical and / or horizontal direction, for example when laying cables or when the ship is at anchor. Cases are also conceivable in which the tension of a rope originating from a helicopter in the air is to be kept constant, for example if several helicopters are used to carry heavy loads. So far, complicated electronic helicopter controls have been used for this.

Eine besonders empfehlenswerte spezielle Lösung gemäß der Erfindung besteht darin, daß die Winde ein handelsüblicher druckluftbetriebener Schlepperhaspel mit einem aus einer mittleren Haltstellung auf Vor- und Rückwärtsgang steuerbaren Handhebel ist, an dem ein den Lageänderungen des beweglichen Elementes der Spannvorrichtung folgendes Gestänge angreift,A particularly recommendable special solution according to the invention is that the winch is a commercially available compressed air-operated tractor reel with a hand lever that can be controlled from a middle stop position for forward and reverse gear, on which a linkage following the changes in position of the movable element of the tensioning device acts,

Das bewegliche Element der Spannvorrichtung zur Erzeugung der Gegenspannkraft im Seil ist zweckmäßig eine Spannrolle, über die das Zugseil geführt ist, wobei die Spannrolle an dem kurzen Hebelarm eines Waagebalkens angeordnet ist, an dessen längerem Hebelarm eine Zugfeder und eine zum Handhebel der Winde führende Betätigungsstange angeschlossen sind. Hierbei ist die Gleichgewichtslage der Spannrolle dann eingestellt, wenn die Federkraft den Waagebalken und über die Betätigungsstange den Handhebel der Winde in der Lage hält, in der das Moment aus Spannkraft an der Spannrolle und kurzem Hebelarm gleich dem Moment aus Federkraft und dem längeren Hebelarm, unter dem die Feder am Waagebalken angreift, gleich sind.The movable element of the tensioning device for generating the counter-tensioning force in the rope is expediently a tensioning roller over which the pull rope is guided, the tensioning roller being arranged on the short lever arm of a balance beam, to the longer lever arm of which a tension spring and an actuating rod leading to the hand lever of the winch are connected are. Here, the equilibrium position of the tensioning roller is set when the spring force holds the balance beam and, via the actuating rod, the hand lever of the winch in such a way that the moment of tensioning force on the tensioning roller and short lever arm equals the moment of spring force and the longer lever arm, below which the spring engages on the balance beam are the same.

Zur Einstellung der gewünschten Soll-Spannung im Zugseil kann das Hebelarmverhältnis und/oder die Federkraft änderbar sein. Ferner wird zweckmäßig die Lageänderung des beweglichen Elementes bzw. der Spannrolle durch Anschläge begrenzt,denen Schaltstellungen der Steuerung der Winde zugeordnet sind, in denen die Winde voll eingeschaltet ist. Wenn beispielsweise durch eine schnelle Verstellung des Gegenstandes, an dem das Zugseil letztlich angreift,ein starker Ausschlag des beweglichen Elementes bzw. der Spannrolle erfolgt, ist die Winde in einer Anschlaglage zum Ablaufenlassen oder Einholen des Zugseiles voll eingeschaltet.The lever arm ratio and / or the spring force can be changed to set the desired target tension in the pull rope. Furthermore, the change in position of the movable is useful Element or the tension roller limited by stops, which are assigned switching positions of the control of the winch, in which the winch is fully switched on. If, for example, a rapid deflection of the object on which the traction rope ultimately engages results in a strong deflection of the movable element or the tensioning pulley, the winch is fully switched on in a stop position to allow the traction rope to run off or to be brought in.

Wenn die Winde, die Spannvorrichtung und die Steuerung für die Winde eine transportable Einheit bilden, ist die Vorrichtung gemäß der Erfindung in Anpassung an örtliche Verhältnisse stets an dem günstigsten Platz aufzustellen.If the winch, the tensioning device and the control for the winch form a transportable unit, the device according to the invention is always to be installed in the most favorable place in adaptation to local conditions.

Um zu vermeiden, daß Energie- oder andere Leitungen, die gespannt gehalten werden sollenselbst über die Winde geführt werden müssen, wird zum mittelbaren Gespannthalten eines Stromkabels oder dergleichen vorgeschlagen, daß das Stromkabel um eine am Ende des Zugseiles befestigte Umlenkrolle geführt ist. Hierdurch benötigt die Vorrichtung gemäß der Erfindung außer der Energiezufuhr für die Winde keinerle. weiterer energieführenden Anschlüsse, wie auch über ein einfaches Seil und die Umlenkrolle jede Art von Kabeln oder flexiblen Leitungen gespannt gehalten werden kann.

Figure imgb0001
lediglich die Umlenkrolle entsprechend gewählt zu werden wobei auch die Möglichkeit besteht, eine Mehrfach-
Figure imgb0002
für verschiedene flexible Leitungen vorzusehen, die alle su ein und demselben beweglichen Gegenstand führen. Hierbei empfiehlt es sich, in Anpassung an unter Umständen unterschiedliche Durchmesser der verschiedenen Leitungen
Figure imgb0003
Umlenkrollen unterschiedlicher Durchmesser vorzusehen
Figure imgb0004
die ablaufenden Längen von Leitungen bei Lageänderungen der Mehrfach-Umlenkrolle und damit deren Spannungen unter sich möglichst gleichbleiben.In order to avoid that energy or other lines which are to be kept taut even through the winch, it is proposed to indirectly tension a power cable or the like that the power cable is guided around a pulley attached to the end of the pull rope. As a result, the device according to the invention does not require anything other than the energy supply for the winch. further energy-carrying connections, as well as any type of cable or flexible lines can be kept taut with a simple rope and the deflection roller.
Figure imgb0001
only the pulley to be chosen accordingly, with the possibility of a multiple
Figure imgb0002
To be provided for various flexible lines, all of which carry the same moving object. It is advisable to adapt to different diameters of the different lines
Figure imgb0003
To provide pulleys of different diameters
Figure imgb0004
the running lengths of lines when the position of the multiple deflection roller changes and thus the tensions between them remain as constant as possible.

In der Zeichnung ist ein Ausführungsheispiel einer "Rafferwinde" gemäß der

Figure imgb0005

  • Fig. 1 eine schematische Darstellung der Anordnung einer "Rafferwinde" in Verbindung mit einer fahrbaren Kohlegewinnungsmaschine,
  • Fig. 2 eine Draufsicht auf die "Rafferwinde" als transportable Einheit und
  • Fig. 3 einen Schnitt nach der Linie III-III in Fig. 2.
In the drawing is an exemplary embodiment of a "winch" according to the
Figure imgb0005
  • F ig. 1 is a schematic representation of the arrangement of a "packer winch" in connection with a mobile coal extraction machine,
  • F ig. 2 shows a plan view of the "packer winch" as a transportable unit and
  • 3 shows a section along the line III-III in FIG. 2.

In Fig. 1 erkennt man eine vor Ort befindliche fahrbare Kohlegewinnungsmaschine 1, von der ein Stromkabel 2 ausgeht, das an einem ortsfest angeordneten Schaltkasten 3 angeschlossen ist. Dieses Stromkabel 2 soll unter den Fahrbewegungen der Kohlegewinnungsmaschine 1 mittels der erfindungsgemäßen "Rafferwinde" 4" gespannt gehalten werden, damit es nicht von der Kohlegewinnungsmaschine überfahren werden kann. Hierzu ist das Stromkabel 2 über eine Umlenkrolle 5 an den Schaltkasten 3 geführt, wobei die Umlenkrolle 5 der Endpunkt eines Zugseiles 6 ist, das zu der Winde gemäß der Erfindung führt. Das Stromkabel 2 wird somit über das Zugseil 6 mittelbar gespannt gehalten. Wenn die Kohlegewinnungsmaschine 1 nach links verfahren wird, folgt die Umlenkrolle 5 in die strichpurktiert dargestellte Endstellung 5'. Der im Ausführungsbeispiel maximale Verstellweg S der Umlenkrclle 5 ist die Hälfte des maximalen Verfahrweges der Kohlegewinnungsmasdine 1 nach links.In Fig. 1 you can see a mobile coal extraction machine 1 located on site, from which a power cable 2 is connected, which is connected to a fixedly arranged switch box 3. This power cable 2 is to be kept taut under the driving movements of the coal mining machine 1 by means of the "winch winch" 4 according to the invention, so that it cannot be run over by the coal mining machine. For this purpose, the power cable 2 is guided to the switch box 3 via a deflecting roller 5, the deflecting roller 5 is the end point of a traction cable 6 which leads to the winch according to the invention, the power cable 2 is thus held indirectly tensioned via the traction cable 6. When the coal mining machine 1 is moved to the left, the deflection roller 5 follows into the end position 5 'shown in dashed lines. In the exemplary embodiment, the maximum adjustment path S of the deflection 5 is half of the maximum displacement path of the coal extraction machine 1 to the left.

Die "Rafferwinde" gemäß der Erfindung nach Fig. 2 und 3 umfaßt zunächst eine Bodenplatte 8 mit einem daran befestigten handelsüblichen druckluftbetriebenen Schlepperhaspel 9, dessen Handhebel 10 in Fig. 3 in waagerechter mittlerer Haltstellung steht. Dieser Handhebel ist in die beiden strichpunktiert dargestellten Schwenklagen für Vorwärts- und Rückwärtsgang verstellbar, so daß der Schlepperhaspel 9 reversierbar und mit regelbarem Antrieb ausgestattet ist. Auf die Trommel 9a des Schlepperhaspels 9 ist das Zugseil 6 aufgewickelt, das zu der Achse der Umlenkrolle 5 führt (Fig. 1).The "winch winch" according to the invention according to FIGS. 2 and 3 initially comprises a base plate 8 with a commercially available compressed air-operated tractor reel 9 fastened thereon, the hand lever 10 of which is in a horizontal middle stop position in FIG. 3. This hand lever is adjustable in the two dash-dotted pivot positions for forward and reverse gear, so that the tractor reel 9 is reversible and equipped with a controllable drive. The traction cable 6, which leads to the axis of the deflection roller 5, is wound onto the drum 9a of the tractor reel 9 (Fig. 1).

Wie Fig. 2 zeigt, läuft das Zugseil 6 über eine lageveranderliche Spannrolle 11, von der aus die Steuerung für den Handhebel 10 des Schlepperhaspels 9 betätigt wird. Die Spannrolle 11 ist an dem kurzen Hebelarm 12a eines Waagebalkens 12 angeordnet, an dessen längerem Hebelarm 12b eine Zugfeder 13 und eine zum Handhebel 10 führende Betätigungsstange 14 angeschlossen sind. Der Waagebalken 12 ist um die Drehachse 15 einer Gabel 16, die über eine Stütze 17 mit der Grundplatte 8 verbunden ist, schwenkbar gelagert. Die Spannrolle 11 ist über eine Doppellasche 18 am Ende des kurzen Hebelarmes 12a des Waagebalkens 12 gelenkig befestigt. In Fig. 3 erstreckt sich diese Doppellasche 18 zum Teil hinter der geschnitten dargestellten Gabel 16.As shown in FIG. 2, the traction cable 6 runs over a tension roller 11 that changes its position, from which the control for the hand lever 10 of the tractor reel 9 is actuated. The tensioning roller 11 is arranged on the short lever arm 12a of a balance beam 12, to the longer lever arm 12b of which a tension spring 13 and an actuating rod 14 leading to the hand lever 10 are connected. The balance beam 12 is pivotally mounted about the axis of rotation 15 of a fork 16, which is connected to the base plate 8 via a support 17. The tension roller 11 is articulated via a double bracket 18 at the end of the short lever arm 12a of the balance beam 12. In Fig. 3, this double strap 18 extends partially behind the fork 16 shown in section.

Die Hebelverhältnisse des Waagebalkens 12 und die Kraft der Feder 13 sind so bemessen, daß die entgegen der Federkraft beweglich geführte Spannrolle 11 unter der am Seil angreifenden gewünschten Spannkraft im Gleichgewicht ist. Die am Seil 6 angreifende Spannkraft wird von dem anstehenden Drehmoment des Schlepperhaspels 9 erzeugt. Ist beispielsweise das Hebelverhältnis zwischen dem kurzen Hebelarm 12a entsprechend dem Abstand der Gelenkpunkte 15 - 19 und der, langen Hebelarm 12b entsprechend dem Abstand der Gelenkpunkte 16 - 20 gleich 1 : 3, so befindet sich der Waagebalken 12 dann im Gleichgewichtszustand, wenn bei einer Federkraft von beispielsweise 2000 N an der Spannrolle 11 eine kraft von 660 N angreift. Diese Spannkraft soll der gewünschten Spannung im Seil 6 entsprechen. Bei der Gleichgewichtslage des Waagebalkens 12 ist die Länge der Betätigungsstange so bemessen, daß der Handhebel 10 etwas gegenüber der mittleren Haltstellung verschwenkt ist in dem Sinne, daß der Schlepperhaspel 9 ständig das Moment aufbringt, was erfordarlich ist, um an dem Gelankpundt 19 das Waagebalkens 12 über die Spannrolle 11 eine kraft von 666 N angreifen zu lassen Die Zugleistung des Schlepperhaspels muß also reichtich höher sein als es der Sollkraft von 660 N entspricht.The lever ratios of the balance beam 12 and the force of the spring 13 are dimensioned such that the tensioning roller 11, which is movably guided against the spring force, is in balance under the desired tensioning force acting on the rope. The tensioning force acting on the rope 6 is generated by the torque of the tractor reel 9. If, for example, the lever ratio between the short lever arm 12a corresponding to the distance between the articulation points 15-19 and the long lever arm 12b corresponding to the distance between the articulation points 16-20 is equal to 1: 3, the balance beam 12 is then in the equilibrium state when there is a spring force a force of 660 N, for example of 2000 N, acts on the tensioning roller 11. This tensioning force should correspond to the desired tension in the rope 6. When the balance beam 12 is in the equilibrium position, the length of the actuating rod is dimensioned such that the hand lever 10 is pivoted somewhat in relation to the central stop position in the sense that the tractor reel 9 constantly applies the torque which is necessary in order to attach the balance beam 12 to the joint member 19 to allow a force of 666 N to act on the tension pulley 11 The pulling power of the tractor reel must be sufficient be higher than the target force of 660 N.

Wenn - bezogen auf den Anwendungsfall nach Fig. 1 - die Kohlegewinnungsmaschine 1 nach links auswandert und damit auch die Umlenkrolle 5, so erhöht sich die Spannkraft im Seil 6 mit der Folge, daß die Spannrolle 11 entsprechend auswandert. Der maximale, durch einen Anschlag 21 begrenzte Ausschlag des Waagebalkens 12 ist in Fig. 2 strichpunktiert dargestellt. Der in die andere Richtung gehende Ausschlag des Waagebalkens 12 ist durch einen Anschlag 22 begrenzt. Den beiden Anschlägen sind Schaltstellungen der Steuerung zugeordnet, in denen der Schlepperhaspel 9 in der einen oder anderen Drehrichtung voll eingeschaltet ist.If - based on the application according to FIG. 1 - the coal extraction machine 1 migrates to the left and thus also the deflection roller 5, the tensioning force in the cable 6 increases, with the result that the tensioning roller 11 migrates accordingly. The maximum deflection of the balance beam 12, limited by a stop 21, is shown in dash-dot lines in FIG. 2. The deflection of the balance beam 12 going in the other direction is limited by a stop 22. Switch positions of the control are assigned to the two stops, in which the tractor reel 9 is fully switched on in one or the other direction of rotation.

Wie gesagt, verstellt sich der Waagebalken 12 in Richtung auf die strichpunktierte Schwenklage dann, wenn die Spannkraft im Seil erhöht wird. Hierdurch wird über die Betätigungsstange 14 der Handhabel 10 auf Rücklauf des Schlepperhaspels 9 verstellt, d. h. die Seiltrommel 9a läßt Seil ablaufen. Hierdurch stellt sich die Spannrolle 11 unter der Kraft der Feder wieder zurück, bis der Gleichgewichtszustand am Waagebalken bzw. die Soll-Spannkraft im Seil 6 wiederhergestellt sind. Der Handhebel 10 befindet sich dann wieder in der Stellung, die bei Ruhelage der Umlenkrolle 5 der gewünschten Spannkraft im Seil entspricht. Sinkt die Seilkraft beispielsweise beim Verfahren der Kohlegewinnungsmaschine nach rechts, schwenkt der Waagebalken 12 im anderen Sinne und die Trommel 9a wird im Sinne eines Aufspulens des Seiles 6 gedreht. Stets wird der Schlepperhaspel 9 durch die beschriebene Steuerung in Abhängigkeit von Lageänderungen der Spannrolle 11 in demjenigen Drehsinn eingeschaltet, der die Spannrolle in Gleichgewichtslage zurückzustellen sucht, in der der Schlepperhaspel 9 abgebremst ist oder auf die Trommel 9a ein ständiges bestimmtes Drehmoment einwirkt.As said, the balance beam 12 moves in the direction of the dot-dash pivot position when the tensioning force in the rope is increased. As a result, the handle 10 is adjusted via the actuating rod 14 to return the tractor reel 9, ie the cable drum 9a allows the cable to run off. As a result, the tensioning roller 11 resets under the force of the spring until the equilibrium state on the balance beam or the desired tensioning force in the rope 6 are restored. The hand lever 10 is then again in the position which corresponds to the desired tensioning force in the rope when the deflection roller 5 is at rest. Decreases the cable force, for example, in the process of coal mining machine to the right, pivoting the balance beam 12 in the other direction and the barrel 9a of a supervisor is in the sense p Ulens of the rope 6 is rotated. The tractor reel 9 is always switched on by the control described as a function of changes in the position of the tensioning roller 11 in the direction of rotation that seeks to reset the tensioning roller in the equilibrium position, in which the tractor reel 9 is braked or a constant, specific torque acts on the drum 9a.

Abweichend von dem gezeichneten Ausführungsbeispiel der Erfindung ist es denkbar, daß die Winde auf einer in Richtung des Zugseils hin- und herbeweglichen Plattform ruht, an der die Spannvorrichtung angreift. Bei dieser Ausführungsform ist die Trommel der Winde selbst das bewegliche Element der Spannvorrichtung.Deviating from the illustrated embodiment of the invention, it is conceivable that the winch rests on a platform which can be moved back and forth in the direction of the pulling rope and on which the tensioning device acts. In this embodiment, the drum of the winch is itself the movable element of the tensioning device.

Claims (9)

1. Vorrichtung zum Gespannthalten eines Zugseiles, das an einen unabhängig von der Seilkraft lageveränderlichen Gegenstand angeschlossen ist, insbesondere zum mittelbaren Gespannthalten eines zu einer hin- und herfahrbaren Kohlegewinnungsmaschine führenden Stromkabels, gekennzeichnet durch eine regelbar und reversierbar angetriebene Winde (9), eingerichtet zur kontinuierlichen Abgabe eines Drehmomentes und somit einer kontinuierlichen Zugkraft im Zugseil (6), mit einer Trommel (9a) zur Aufnahme eines Endes des Zugseils, eine Spannvorrichtung (11, 18, 12, 13) zur Ausübung einer Gegenspannkraft im Zugseil mit einem in Abhängigkeit von der Spannung im Zugseil beweglichen Element (11), an dem eine eine gewünschte Spannung bestimmtende nachhaltige Federkraft angreift, die so groß bemessen ist, daß das bewegliche Element in Gleichgewichtslage ist, wenn die kontinuierliche Zugkraft der Winde gleich der von der Spannvorrichtung ausgeübten gewünschten Gegenspannkraft ist, und durch eine Steuerung (14, 10) zum Regeln der Winde in Abhängigkeit von Lageänderungen des beweglichen Elementes (11) der Spannvorrichtung in dem Sinne und Ausmaß, daß das bewegliche Element in die Gleichgewichtslage zurückgestellt wird. 1st Device for tensioning a pull rope, which is connected to an object which can change position independently of the rope force, in particular for indirectly tensioning an electric cable leading to a reciprocating coal-mining machine, characterized by a controllable and reversible driven winch (9), set up for the continuous delivery of a torque and thus a continuous pulling force in the pulling rope (6), with a drum (9a) for receiving one end of the pulling rope, a tensioning device (11, 18, 12, 13) for exerting a counter-tensioning force in the pull rope with an element (11) which is movable as a function of the tension in the pull rope and which is acted upon by a sustained spring force which determines a desired tension and which is so large that the movable element is in equilibrium when the continuous pulling force of the winch is equal to the desired counter-tensioning force exerted by the tensioning device, and by a control (14, 10) for regulating the winch as a function of changes in position of the movable element (11) of the tensioning device in the sense and extent that the movable element is returned to the equilibrium position. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Winde (9) ein handelsüblicher druckluftbetriebener Schlepperhaspel mit einem aus einer mittleren Haltstellung auf Vor- und Rückwärtsgang steuerbaren Handhebel (10) ist, an dem ein den Lageänderungen des beweglichen Elementes (11) der Spannvorrichtung folgendes Gestänge (14) angreift.2. Device according to claim 1, characterized in that the winch (9) is a commercially available compressed air-operated tractor reel with a hand lever (10) which can be controlled from a middle stop position for forward and reverse gear, on which a the changes in position of the move union element (11) of the clamping device engages the following linkage (14). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das bewegliche Element eine Spannrolle (11) ist, über die das Zugseil (6) geführt ist, und daß die Spannrolle an dem kurzen Hebelarm (12a) eines Waagebalkens (12) angeordnet ist, an dessen längerem Hebelarm eine Zugfeder (12b) und eine zum Handhebel (10) führende Betätigungsstange (14) angeschlossen sind.3. Apparatus according to claim 1 or 2, characterized in that the movable element is a tension roller (11) over which the traction cable (6) is guided, and that the tension roller on the short lever arm (12a) of a balance beam (12) is arranged is on the longer lever arm, a tension spring (12b) and an operating rod (14) leading to the hand lever (10) are connected. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Hebelarmverhältnis änderbar ist.4. The device according to claim 3, characterized in that the lever arm ratio is changeable. 5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Federkraft änderbar ist.5. The device according to claim 3, characterized in that the spring force is changeable. 6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Lageänderung des beweglichen Elementes (11) durch Anschläge (21, 22) begrenzt ist.6. The device according to claim 1, characterized in that the change in position of the movable element (11) by stops (21, 22) is limited. ?. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet daß den Anschlägen (21, 22) Schaltstellungen der Steuerung zugeordnet sind, in denen die Winde (9) voll eingeschaltet ist.? Device according to claim 6, characterized in that the stops (21, 22) are assigned switch positions of the control in which the winch (9) is fully switched on. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Winde (9), die Spannvorrichtung (18, 11, 12, 13) und die Steuerung (12, 13) eine transportable Einheit bilden.Device according to claim 1, characterized in that the winch (9), the tensioning device (18, 11, 12, 13) and the control (12, 13) form a transportable unit. 9. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zum mittelbaren Gespannthalten eines Stromkabels oder dergleichen das Stromkabel (2) um eine am Ende des Zugseiles (6) befestigte Umlenkrolle (5) geführt ist.9. The device according to one or more of the preceding claims, characterized in that for the indirect tensioning of a power cable or the like, the power cable (2) is guided around a deflecting roller (5) attached to the end of the traction cable (6).
EP79102488A 1978-07-25 1979-07-17 Device for maintaining the tension in a tow cable Expired EP0007554B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102488T ATE1575T1 (en) 1978-07-25 1979-07-17 DEVICE FOR KEEPING A TENSIONED ROPE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2832567A DE2832567C2 (en) 1978-07-25 1978-07-25 Device for holding a rope or similar thread-like material under tension
DE2832567 1978-07-25

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EP0007554A1 true EP0007554A1 (en) 1980-02-06
EP0007554B1 EP0007554B1 (en) 1982-09-22

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US (1) US4318533A (en)
EP (1) EP0007554B1 (en)
JP (1) JPS5521392A (en)
AT (2) AT363884B (en)
DE (1) DE2832567C2 (en)

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Also Published As

Publication number Publication date
DE2832567C2 (en) 1985-03-21
JPS5521392A (en) 1980-02-15
US4318533A (en) 1982-03-09
EP0007554B1 (en) 1982-09-22
AT363884B (en) 1981-09-10
ATE1575T1 (en) 1982-10-15
ATA76879A (en) 1981-02-15
DE2832567A1 (en) 1980-02-07

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