EP4114780A1 - Engin de levage tel qu'une grue - Google Patents

Engin de levage tel qu'une grue

Info

Publication number
EP4114780A1
EP4114780A1 EP21717777.3A EP21717777A EP4114780A1 EP 4114780 A1 EP4114780 A1 EP 4114780A1 EP 21717777 A EP21717777 A EP 21717777A EP 4114780 A1 EP4114780 A1 EP 4114780A1
Authority
EP
European Patent Office
Prior art keywords
rope
hoist
medium
hoist according
fiber rope
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21717777.3A
Other languages
German (de)
English (en)
Inventor
Gerhard Schmid
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.)
Liebherr Werk Biberach GmbH
Original Assignee
Liebherr Werk Biberach GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Werk Biberach GmbH filed Critical Liebherr Werk Biberach GmbH
Publication of EP4114780A1 publication Critical patent/EP4114780A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail

Definitions

  • the present invention relates to a hoist, in particular in the form of a crane, with a high-strength fiber rope to which a load-bearing and / or holding means is attached.
  • Such static charges arise when different materials rub against plastics, as is known, for example, when pulling a synthetic fiber sweater over the head or when walking over a synthetic fiber carpet.
  • the human body or other conductive objects such as metallic parts are charged to a corresponding potential which, if touched with oppositely charged potentials, can lead to discharge or to a spark jump.
  • this discharge through the human body can also lead to currents that are hazardous to health.
  • the present invention is based on the object of creating an improved hoist of the type mentioned, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner.
  • reliable protection against electric shocks should be achieved and the problem of electrostatic charges on the load-bearing and / or holding means attached to the high-strength fiber rope should be alleviated.
  • the unloading device can advantageously be designed to interact with the running or moving rope in order to enable unloading even during the operation of the hoist.
  • the unloading device can be in sliding contact with the rope and / or in rolling engagement, so that the rope can move past the unloading device and still unload, so to speak, while running past.
  • the said Entladungseinrich device can have a charge arrester contacting the rope surface in order to be able to divert charges on the fiber rope.
  • the mentioned charge arrester can with the steel structure or the supporting structure of the hoist or be connected to another grounding potential in order to be able to derive the charge tapped from the surface of the fiber rope into the hoist structure or said grounding potential.
  • Said charge diverter can comprise at least one rope contact element which can be adapted in shape to the rope surface and / or the cross section in order to have a sufficient contact surface with the rope via which the load can be transported away.
  • Said contact element can be in sliding engagement with the fiber rope or form a sliding contact with the rope, so that a relative movement between the rope and the charge arrester can take place.
  • the contact element of the charge arrester can also be in rolling engagement with the fiber rope in order to be able to roll on the passing fiber rope, which also creates a sufficient contact surface for discharging the charge.
  • the charge arrester can also be in contact with the fiber rope in a different way. If, for example, the fiber rope is installed in a boom and / or mast adjustment mechanism and attached to the boom and / or mast, the Ladungsablei ter can also be rigidly or immovably attached to the fiber rope, for example gripping the fiber rope tightly in the manner of a sleeve.
  • said charge diverter can comprise a deflection pulley over which the fiber rope runs or is deflected.
  • a pulley can be made of steel or a flow-conducting metal alloy and electrically connected to the hoist support structure, for example by a metallic pivot bearing or other flow-transmitting device, in order to be able to derive electrostatic charges into the hoist structure.
  • a pure contact roller can also be provided as the contact element, which does not actually deflect the rope, but only rolls it off on the rope.
  • a contact brush, a contact slide or another sliding or sliding engagement contact can also be provided.
  • the discharge device can have a wetting device for wetting the surface of the fiber rope with an electrically conductive medium.
  • a wetting device for wetting the surface of the fiber rope with an electrically conductive medium.
  • the insulating property of the fiber rope can be overcome or its conduction weakness can be alleviated, so that electrostatic charges can be conducted to the charge arrester via the applied medium.
  • the frictional contact with pulleys, guide clasps and the like is so different that the fiber rope is no longer charged in the known manner. Sufficient moisture prevents or reduces the charging of the rope, so that there is no need for a separate charge diverter.
  • Said wetting device can advantageously have a medium reservoir in which the electrically conductive medium to be applied to the rope can be stored.
  • a storage tank can be, for example, a canister or a foil bag or a storage cylinder in which a supply of medium can be stored.
  • Said medium reservoir can be arranged in the vicinity of the application location at which the medium is applied to the fiber rope, in order to have short conveying or application paths. If the medium is to be applied to the load-bearing and / or holding device, for example, the storage container can be attached to the called load-bearing and / or holding means such as a load hook.
  • a medium reservoir can also be attached to a boom or a structural part of the hoist, from which the fiber rope runs off or to which the fiber rope is attached, this being, for example, a luffing jib or adjustable mast of the hoist.
  • the medium reservoir can be positioned above the application location in order to transport the medium to the application location driven by gravity or to support the conveyance of the medium to the application location at least by gravity.
  • a medium reservoir arranged at the same level or below the application location can also be provided.
  • a pump can be provided to convey the medium from the reservoir to the discharge location.
  • the wetting device can have one or more application elements which can have an application opening directed towards the rope.
  • a spray and / or spray nozzle can be provided as an application element, which directs a spray-shaped cloud and / or a jet onto the rope.
  • a dropper for dropping or dripping onto the rope can be provided as the discharge element, wherein the named dropper can be arranged above, in particular vertically above the rope, in order to let droplets fall onto the rope.
  • a victim can be in the immediate Be arranged close to the rope in order to prevent the droplets from being blown away, for example in stronger winds.
  • a dropper can comprise a drop generator which generates drops of suitable size which can then drip onto the rope.
  • a drop generator can be provided, similar to that known from infusion sets in medical technology. Independently of this, the drop generator can be designed to be adjustable in order to generate drops of different sizes and / or at different intervals.
  • the wetting device can also have a contact application element, for example in the form of a brush-like coating element that spreads the medium onto the surface of the fiber rope.
  • such a brush-like brush can be supplied with medium via a supply channel or a supply line from the medium reservoir, which medium can, for example, run into the brush bristles in order to be distributed by them on the rope.
  • the wetting device can also comprise an immersion bath or an element similar to an immersion bath, such as a tub or also a mist chamber, through which or through which the fiber rope to be wetted can pass.
  • an immersion bath or an element similar to an immersion bath such as a tub or also a mist chamber, through which or through which the fiber rope to be wetted can pass.
  • a trough-shaped immersion bath container can be arranged in the area of a rope pulley and / or a rope bottle, in which a medium level is sufficiently high so that the rope can run through the medium bath.
  • the medium can be atomized into spray mist in a spray chamber, the spray mist remaining trapped in a preferably closed chamber in order not to allow too much mist to flow past the rope.
  • a trough that is open at the top or bottom can also be used, which captures the spray mist to such an extent that it cannot escape in an uncontrolled manner.
  • the rope can run through such a chamber, for example by lowing walls each have an opening through which the rope can pass.
  • the rope does not necessarily have to run through such an immersion bath or an immersion bath-like discharge device. If necessary, a standing rope section can also dip into the immersion basin and / or dwell and / or be arranged in the immersion bath-like discharge element. A distribution of the medium can nevertheless be achieved, e.g. through the capillary effect within the rope, which so to speak sucks up the medium.
  • a distribution of the medium over the rope or in the rope by the capillary effect can also be provided in connection with another application.
  • a section of rope can be dripped continuously or repeatedly, the liquid dripped onto the rope then being distributed in the rope or rope sheath by capillary forces.
  • the application element or elements can be arranged at different points on the lifting device in order to apply the electrically conductive medium to the fiber rope.
  • a discharge element can be provided on the load pick-up and / or holding means in order to wet a cable section located on the load pick-up and / or holding means.
  • a discharge element can be attached to a rope pulley.
  • a dispensing element can also be attached to a lifting structural part in order to wet a free piece of rope.
  • a deployment element can be attached to a boom in order to wet a piece of rope that extends and / or runs past the boom.
  • a discharge element can also be attached to a cable drum or arranged adjacent to it in order to to wet a piece of rope, for example a rope winding looped around the rope drum.
  • a piece of rope running off or running on the rope drum can be wetted by a suitably attached dispensing element.
  • the at least one discharge element is advantageously arranged directly on or near the medium reservoir in order to be able to be supplied with medium via a short connecting line or a short conveying channel.
  • the discharge element can also be arranged at a distance from the medium reservoir, with a conveying or pumping device possibly being provided in order to convey the medium from the medium reservoir to the discharge element and / or to have sufficient pressure on the discharge element .
  • a conveying and / or pumping device for conveying and / or pumping the electrically conductive medium can advantageously be coupled to a drive movement of the rope in order to derive a conveying effect from the rope movement and / or to match the conveying effect to the rope movement.
  • the conveying and / or pumping device can be coupled to a deflecting roller, so that a rotary movement of the deflecting roller generates a drive movement of the conveying and / or pumping device.
  • a pump can be coupled to a pulley on the load hook or the load pick-up and / or holding means in order to be able to provide a conveying effect when the load pick-up means is lowered or raised.
  • the medium used to increase the electrical conductivity can be liquid or pasty or creamy.
  • Water or oil or light emulsions can be used as liquid media.
  • fat or cream or a toothpaste-like medium can be used as pasty or creamy media. Regardless of the pastosity and / or viscosity, a medium that adheres well to fiber ropes is advantageously used.
  • the wetting device can advantageously comprise an adjustable metering device in order to be able to meter the amount of medium to be dispensed.
  • Such a metering device can, for example, include an adjustable valve that can open and close the discharge opening of the discharge element or the front cross section of the delivery line and / or enlarge or reduce it, with the valve being able to be opened and closed intermittently for example to apply a targeted amount per opening cycle.
  • an adjustable hose valve can be used, as is known to be stuck in medical Dosierbe.
  • a tap-like valve can be provided in the delivery line.
  • the metering device can also be part of the aforementioned delivery device, for example in the form of the pump, in order to control the actively delivered output quantity and thus the dose of the medium to be delivered.
  • a Flub piston pump can be used as a metering device that applies a certain amount per Flub.
  • a pressure medium cylinder which can simultaneously serve as a medium store, can comprise an adjustable piston, the adjustment of which dispenses a predetermined dose by a certain distance.
  • said metering device 18 can be driven and / or actuated by a motor.
  • a motor for example, an electromagnetic actuator for opening and closing a metering valve, and / or an electric motor for opening and closing a tap valve and / or a rack and pinion drive and / or a hydraulic motor for actuating said metering cylinder can be provided.
  • the dosing device can, however, also be connected to a hoist rope movement, In particular, a pulley or cable drum must be coupled in order to derive the dosage from the cable movement.
  • a control device which can be designed electronically and / or have a microprocessor and possibly a program memory, can control the wetting device and / or the metering device as a function of various operating and / or environmental parameters.
  • the mentioned control device can actuate the wetting device as a function of a cable movement, whereby for example a cable speed and / or a covered cable adjustment path can be taken into account for the control of the metering device, for example to the effect that a larger amount of medium at higher cable speeds and / or distances is applied than with lower rope speeds and / or distances.
  • control device can actuate or control the wetting device or the metering device as a function of the ambient humidity and / or the ambient temperature. For example, in the event of rain or only very high ambient humidity, the wetting device can be shut down and / or the amount of medium to be applied can be reduced. When the weather becomes increasingly dry and / or the ambient humidity decreases, the wetting device can be actuated and / or the amount of medi to be applied can be increased.
  • the control device can be designed to take into account a weather signal, for example in the form of a rain signal and / or air humidity signal, that can be provided, for example, by a weather station and / or a rain sensor and / or an air humidity sensor.
  • a weather signal for example in the form of a rain signal and / or air humidity signal
  • a weather station and / or a rain sensor and / or an air humidity sensor can be provided, for example, by a weather station and / or a rain sensor and / or an air humidity sensor.
  • control device can also use the wetting device or the metering device as a function of the ambient temperature and / or operate or control the rope temperature. Since static charging occurs more easily or more strongly with increasing temperatures, the control device can be designed to shut down the wetting device at low temperatures, for example frost temperatures, and / or to reduce the dosage and / or, conversely, to activate the actuating device with increasing temperatures press and / or increase the dosage.
  • control device can process a temperature signal that can be provided by a weather station and / or a temperature sensor, wherein said temperature sensor can measure the ambient temperature and / or the rope temperature.
  • the electrical conductivity of the fiber rope can also be achieved by providing an electrically conductive, in particular metallic, wire and / or wire mesh and / or braid and / or a bundle of conductors or strands on and / or in the sheath of the fiber rope, wherein the electrical conductor or conductors can advantageously be woven and / or knocked into the sheath of the fiber rope, which can also be formed from plastic fibers, so that the conductor or conductors are an integral part of the sheath or the sheath layer of the Form fiber rope.
  • the at least one electrical conductor can be provided on the jacket layer in such a way that the conductor is exposed on the outer circumference or on the outer circumference of the fiber rope and can contact a previously described contact element of a charge arrester.
  • the at least one electrical conductor can form part of the outer circumferential surface of the fiber rope in order to be able to contact the contact element of the charge arrester.
  • a metallic braid or individual wires on the outer surface of the fiber rope or on the sheath of the fiber rope can be woven into the fiber rope, for example around metallic rope pulleys and / or a sliding contact in the form of a contact brush and thereby divert electrostatic charge from the fiber rope.
  • a direct, electrically conductive connection of the load-bearing and / or holding means to the supporting structure of the hoist can be provided past the fiber rope .
  • an electrically conductive, preferably limp and / or elastically flexible connecting line between the load bearing and / or holding means on the one hand and a hoist structural part in the area of the run-off point and / or articulation point of the fiber rope on the hoist structure can be provided.
  • Said connecting line is connected on the one hand to the load-bearing and / or holding means and on the other hand to the said lifting structural part and forms, so to speak, a parallel path to the fiber rope.
  • a connecting cable drum or another cable storage device can be attached to said trolley, from which the connecting cable can run, depending on the lifting height of the load hook Provide a suitable length of the connecting cable to bridge the distance between the load hook and the boom.
  • the connecting line memory from which the electrically conductive connecting line can run, can be attached to said jib tip.
  • connection line memory can be designed to be elastically removable, for example in the form of a spring-loaded pull-off drum, from which the connection line is pulled off when the load hook is lowered and the connection line is automatically wound up or pulled in again when the load hook is lifted.
  • the connecting line memory can also be assigned a drive device for actively retrieving and / or lowering the connecting line, with a control device for controlling the drive device being advantageously provided, which can control the drive device as a function of a movement of the fiber rope, in particular synchronously to lower and / or raise the load suspension and / or holding means can lower and / or recover.
  • the load-bearing and / or holding means can also be protected from unwanted electrostatic charge from the fiber rope by the load hook or the load-bearing and / or holding means is electrically isolated from the fiber rope.
  • Such electrical insulation between the fiber rope and the load-bearing and / or holding means can in particular be integrated into the rope deflecting means and / or its mounting.
  • a rope roller bearing and / or spacer washers between the rope roller bearing and the load-bearing and / or holding means can be made of an electrically insulating material, for example in the form of ceramic, wherein the rope roller bearing can be designed as a solid ceramic component and / or provided with a ceramic coating .
  • the mentioned spacer discs which are also designed as an all-ceramic component or can be provided with a ceramic coating.
  • Fig. 1 A side view of a hoist in the form of a tower crane, the sen load-bearing and / or holding means in the form of a load hook is attached to a hoist rope that runs from a trolley ver on the boom of the crane
  • Fig. 2 a perspective view of a wetting device for loading the hoist rope of the crane from the previous figure in the loading area of the load hook, with a medium storage and a rope on the fiber or its pulley directed discharge element are shown,
  • Fig. 3 a perspective view of a wetting device comprising a medium storage and a discharge element for wetting the fiber rope on a rope pulley,
  • FIG. 6 a side view of a charge diverter comprising a rope deflection roller which is mounted in an electrically conductive manner on the boom of the crane from FIG. 1, in an exploded view,
  • FIG. 7 a side view of a charge arrester comprising a sliding contact which is in contact on the one hand with the rope and on the other hand with the boom of the crane from FIG. 1, in an exploded view,
  • Fig. 9 a front view of a pulley for the fiber rope, which is electrically insulated by a ceramic bearing and ceramic spacers
  • 10 a partial side view of a boom of a rotating tower crane, on the trolley of which a cable reel is provided with an electrical connecting cable for electrically connecting the load hook to the boom, and
  • the hoist 1 can be designed as a crane, for example in the form of a tower crane, which comprises a boom 3 sitting on a tower 2, the tower 2 together with the boom 3 or the boom 3 relative to the turn 2 by a upright axis 4 can be rotated.
  • a crane for example in the form of a tower crane, which comprises a boom 3 sitting on a tower 2, the tower 2 together with the boom 3 or the boom 3 relative to the turn 2 by a upright axis 4 can be rotated.
  • a trolley 5 can be moved on the boom 3, from which a load pick-up and / or holding means 7, for example in the form of a load hook, can be lowered and raised.
  • a hoisting rope 6 which can be designed as a high-strength fiber rope made of plastic fibers, as described at the beginning.
  • the hoist can also be another crane, for example in the form of a mobile crane, a telescopic jib crane, a luffing jib crane or a harbor crane or a ship crane.
  • the hoist mentioned is not limited to cranes, but can also be designed for other conveyor and / or construction machines such as rope excavators or freight or passenger lifts or other passenger and / or load conveyors such as a cable car or a chair lift.
  • the fiber rope does not have to be used as a hoist rope, but can also be used to brace and / or adjust a boom or a mast or be used as a revolving reciprocating driven conveyor.
  • a discharge device 8 is provided, the electrical charge from the rope 6 and / or the load-bearing and / or holding means 7 in the supporting structure of the hoist or another earthing potential element.
  • the discharge device 8 can electrically connect the cable 6 and / or the load-bearing and / or holding means 7 to the steel structure of the crane 1, preferably its boom 3 and / or its tower 2 and / or its uppercarriage and / or undercarriage .
  • the detection device 8 can comprise a charge diverter 9 which has at least one contact element 10 for electrically conductive contact with the moving rope 6.
  • Such a contact element 10 can be in electrically conductive rolling engagement with the cable 6, as shown in FIG. 6, and / or in electrically conductive sliding engagement with the cable 6, as is shown in FIG. 7.
  • the contact element 10 can comprise a cable pulley, over which the cable 6 runs and is deflected. If necessary, a pure con tact roller without rope deflection could also be provided.
  • Said rope pulley is designed to be electrically conductive, for example made of a metal alloy, and is stored in an electrically conductive manner on the hoist structure.
  • the pivot bearing of the rope pulley can advantageously be electrically conductive be formed, for example by a metallic roller axle and possibly interconnected metallic rolling elements.
  • the charge arrester 9 or its contact element 10 can also comprise a sliding contact slide, for example in the form of a contact brush, which is or are designed to be electrically conductive and to make electrically conductive contact with the cable 6. Said sliding contact is connected in an electrically conductive manner to the crane boom 3 or another Flebezeug Modellteil in order to derive a conducted charge from the rope 6 into the steel structure of the hoist.
  • the aforementioned rope 6 can be attached to its outer sheath with at least one electrically conductive wire 6I and / or a wire mesh and / or a wire work, wherein, for example, individual wires 6I or a metallic mesh can be woven and / or wrapped into the outer sheath of the rope 6, see FIG. 11.
  • the electrical conductor 6I is advantageously introduced in such a way that the conductor is exposed to the outer circumference of the rope and / or forms part of the outer circumference in order to be able to make electrical contact with the contact element 10, see FIG. 11.
  • the electrical conductivity of the cable 6 can also be improved by wetting it with an electrically conductive medium that can be applied to the outer circumference of the cable 6.
  • a wetting device 11 for wetting the surface of the fiber rope 6 can advantageously comprise a medium reservoir 12 in which the electrically conductive medium such as oil or water can be stored.
  • Said medium storage 12 can, for example, be in the form of a canister or another container, as shown in FIGS. 2-5.
  • a variable-volume memory can also be provided, for example in the form of a foil bag, a paste tube or a storage cylinder with a displaceable piston, which could also be used to put the medium under pressure and / to challenge it and / or to dose it ren.
  • the wetting device 11 can advantageously comprise at least one application element 13, which can comprise an application opening directed onto the rope 6.
  • the above-mentioned application element 13 can comprise a spray nozzle which directs a directed jet and / or a directed misting cloud onto the rope 6.
  • a dispensing element 13 in the form of a drip valve or a drip element can also be provided, which forms the medium to be dispensed into droplets that can drip onto the rope 6.
  • the dispensing element 13 can also be spread over, for example in the form of a brush or a roll of fleece material or a roll of fabric material, with which the medium can be spread or rolled on the surface of the rope 6.
  • the wetting device 11 can be assigned to the section of rope that is to be wetted with the medium mentioned.
  • the medium reservoir 12 can be arranged above the piece of rope to be wetted, wherein the discharge element 13 directed towards the rope 6 can be arranged directly on the rope and can be connected to the medium accumulator 12 by a front line 14.
  • FIG. 2 shows, for example, a piece of rope located on the load-bearing and / or holding means 7 can be wetted and the wetting device 11 can be arranged on the load-bearing and / or holding means 7 mentioned.
  • the discharge element 13 can discharge the medium directly onto the named piece of rope on the load receiving and / or holding means 7 and / or bring it to a pulley around which the rope 6 on the load holding and / or holding means 7 revolves.
  • the medium storage device 12 can be mounted on the load-bearing and / or holding means 7 and the movements of the load-bearing and / or holding means 7 join in.
  • the wetting device 11 can also be arranged on a rope pulley or deflection pulley 15.
  • This can be, for example, the pulley 15 on the trolley 5 of the crane 1 or on another section of the boom 3 in order to benet the rope 6 or the rope section located there.
  • the medium reservoir 12 with the associated discharge element 13 can be mounted on the mentioned trolley 5 or another section of the boom 3, for example its boom tip, in order to be able to wet the rope section that runs around the pulley 15.
  • the wetting device 11 can also wet a free-running piece of rope.
  • the wetting device 11 including medium reservoir 12 and discharge element 13 can be mounted on a portion of the boom 13 along which the rope 6 runs.
  • the wetting device 11 can also be arranged on or adjacent to a cable winch 16 in order to be able to wet a cable section running off or running on the cable winch 16. If necessary, the medium can also wet the windings of the rope that have already been wound and / or the rope drum itself. If the medium reservoir 12 is arranged above the piece of rope to be wetted, it may be sufficient to convey the medium to the discharge means 13 by gravity.
  • the medium reservoir 12 can also be arranged below and / or at the level of the rope, for example an immersion bath can be provided.
  • such an immersion bath can, for example, comprise a trough 12 which simultaneously serves as a reservoir and through which the fiber rope 6 to be wetted can pass.
  • a trough-shaped immersion bath container can be arranged in which a medium level is sufficiently high so that the rope 6 can run through the medium bath, see FIG. 8.
  • a motor-driven conveying device for example in the form of a pump 17, can also be provided in order to convey the medium to the application point and / or to put it under pressure.
  • a pump can be provided on the medium reservoir 12, for example integrated in the medium reservoir 12.
  • Such a delivery device or pump 17 can be driven by an electric motor, for example, and depending on the arrangement of the wetting device 11, a cable-based power supply or a battery-based power supply can take place.
  • a cable-based power supply or a battery-based power supply can take place.
  • an energy store for example in the form of a rechargeable battery, in order to avoid cabling to the load hook 7.
  • the conveying device or pump 17 can also be driven by a pulley or a cable drum.
  • a drive connection such as a V-belt or a gear stage between the conveying device and the deflection roller 15 or the cable drum, see FIG. 3, such a drive connection also with the other arrangement options such as. Fig. 2 and Fig. 5 can be provided.
  • the wetting device 11 can advantageously also comprise an adjustable metering device 18 in order to be able to meter the amount of the medium to be applied.
  • Such a metering device 18 can include, for example, an adjustable valve that can open and close and / or enlarge or reduce the discharge opening of the discharge element or the front cross-section of the delivery line 14, the valve being able to be opened and closed intermittently, for example, to apply a targeted amount per opening cycle.
  • an adjustable hose valve can be used, as is known to be stuck in medical Dosierbe.
  • a tap-like valve can be provided in the delivery line 14.
  • the metering device 18 can also be part of the aforementioned conveying device, for example in the form of the pump 17, in order to control the actively conveyed output quantity and thus the dose of the medium to be dispensed.
  • a Flub piston pump can be used as a metering device that applies a certain amount per Flub.
  • a pressure medium cylinder which can simultaneously serve as a medium store 12, can comprise an adjustable piston, the delivery of which delivers a predetermined dose by a certain distance.
  • said metering device 18 can be driven and / or actuated by a motor.
  • an electromagnetic actuator can be used, for example, to open and close a metering valve, and / or an electric motor to open and close a tap valve and / or a rack and pinion drive and / or a hydraulic motor for actuating said metering cylinder can be seen easily.
  • a control device 19 can control the wetting device 11 and / or the metering device 18 as a function of various operating and / or environmental parameters.
  • the mentioned control device 19 can actuate the wetting device as a function of a cable movement, whereby, for example, a cable speed and / or a covered cable adjustment path can be taken into account for the control of the metering device 18, for example to the effect that at higher cable speeds and / or distances larger amount of medium is applied than with lower rope speeds and / or distances.
  • control device 19 can actuate or control the wetting device 11 or the metering device 18 as a function of the ambient humidity and / or the ambient temperature. For example, in the event of rain or only very high ambient humidity, the wetting device 11 can be shut down and / or the amount of medium to be applied can be reduced. With increasingly dry weather and / or decreasing ambient humidity, the wetting device can be actuated and / or the amount of medium to be applied can be increased.
  • the control device 19 can be designed to take into account a weather signal, for example in the form of a rain signal and / or air humidity signal, that can be provided, for example, by a weather station and / or a rain sensor and / or a humidity sensor.
  • a weather signal for example in the form of a rain signal and / or air humidity signal, that can be provided, for example, by a weather station and / or a rain sensor and / or a humidity sensor.
  • control device 19 can also actuate or control the wetting device 11 or the metering device 18 as a function of the ambient temperature and / or the cable temperature. Since a static charge occurs more easily or more strongly with increasing temperatures, the control device 19 can be designed to reduce the wetting device 11 at low To shut down temperatures, for example frost temperatures, and / or to reduce the dosing amount and / or, conversely, to actuate the actuating device 11 with increasing temperatures and / or to increase the dosing amount.
  • control device 19 can process a temperature signal which can be provided by a weather station and / or a temperature sensor, wherein the said temperature sensor can measure the ambient temperature and / or the cable temperature.
  • said load-bearing and / or holding means 7 can be electrically isolated from the rope 6 or an electrical insulation 20 can be provided between these two elements.
  • said insulation 20 can for example be provided by a ceramic rope roller bearing 20b, which can comprise a ceramic bearing pin and / or ceramic rolling bearing rings and / or ceramic rolling elements and / or ceramic sliding bearing rings , be mounted on the load-bearing and / or holding means 7, see FIG. 9.
  • the insulation 20b can comprise a ceramic bearing pin and / or ceramic rolling bearing rings and / or ceramic rolling elements and / or ceramic sliding bearing rings , be mounted on the load-bearing and / or holding means 7, see FIG. 9.
  • the insulation 20b can comprise a ceramic bearing pin and / or ceramic rolling bearing rings and / or ceramic rolling elements and / or ceramic sliding bearing rings , be mounted on the load-bearing and / or holding means 7, see FIG. 9.
  • the insulation 20b can comprise a ceramic bearing pin and / or ceramic rolling bearing rings and / or ceramic rolling elements and
  • FIG. 20 also have a ceramic bearing block in front of the rope roller bearing on the load-bearing and / or holding means 7, as FIG. 9 shows.
  • the insulation 20 can also have ceramic spacers
  • the load-bearing and / or holding means 7 can also be earthed by an electrically conductive connection 21 past the hoist rope 6 or parallel to the hoist rope 6 on the steel structure of the crane 1, cf. 10.
  • a cable reel or a cable storage device 22 can be provided on the trolley 5, from which the electrical connection cable is made 21 to the load-bearing and / or holding means 7 can be lowered or rolled out and in, cf. to post.
  • connecting line 21 is attached to the load-bearing and / or holding means 7 and contacted there in order to achieve the electrically conductive connection to the supporting structure of the hoist.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Ropes Or Cables (AREA)
  • Jib Cranes (AREA)

Abstract

L'invention concerne un engin de levage, plus particulièrement sous la forme d'une grue, comprenant un câble à fibres haute résistance sur lequel est fixé un moyen de réception et/ou de retenue de charge. Selon l'invention, un dispositif de décharge électrique est relié au câble à fibres, lequel dispositif de décharge électrique peut décharger des charges électrostatiques du câble à fibres et/ou du moyen de réception et/ou de retenue de charge fixés au câble de fibres. Il en résulte qu'un moyen de réception et/ou de retenue de charge, tel qu'un crochet de levage, fixé au câble à fibres peut être manipulé de la manière habituelle par un élingueur ou une autre personne au sol sans que ladite personne subisse des chocs électriques.
EP21717777.3A 2020-04-01 2021-04-01 Engin de levage tel qu'une grue Pending EP4114780A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020108990.2A DE102020108990A1 (de) 2020-04-01 2020-04-01 Hebezeug wie Kran
PCT/EP2021/058624 WO2021198421A1 (fr) 2020-04-01 2021-04-01 Engin de levage tel qu'une grue

Publications (1)

Publication Number Publication Date
EP4114780A1 true EP4114780A1 (fr) 2023-01-11

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EP21717777.3A Pending EP4114780A1 (fr) 2020-04-01 2021-04-01 Engin de levage tel qu'une grue

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EP (1) EP4114780A1 (fr)
DE (1) DE102020108990A1 (fr)
WO (1) WO2021198421A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022116761A1 (de) 2022-06-30 2024-01-04 Liebherr-Werk Biberach Gmbh Hebezeug wie Kran
WO2024002998A1 (fr) 2022-06-30 2024-01-04 Liebherr-Werk Biberach Gmbh Dispositif de levage tel qu'une grue

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4146213B2 (ja) 2002-11-12 2008-09-10 三菱電機株式会社 巻上機の接地装置
JP3962812B2 (ja) * 2003-04-17 2007-08-22 独立行政法人労働安全衛生総合研究所 クレーンにおける電撃軽減方法およびその装置ならびに電撃軽減機能を備えたクレーン
DE102005008087B4 (de) * 2004-11-15 2023-10-05 Liebherr-Werk Biberach Gmbh Kran
DE102007042680B4 (de) * 2007-09-10 2019-02-28 Airbus Helicopters Deutschland GmbH Faserseil aus hochfesten Kunstfasern für eine Hubschrauberrettungswinde

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Publication number Publication date
WO2021198421A1 (fr) 2021-10-07
DE102020108990A1 (de) 2021-10-07

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