EP2949615B1 - Treuil à câble avec régulation contrôlée automatiquement de la vitesse de déroulement d'un câble de traction - Google Patents

Treuil à câble avec régulation contrôlée automatiquement de la vitesse de déroulement d'un câble de traction Download PDF

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Publication number
EP2949615B1
EP2949615B1 EP15169142.5A EP15169142A EP2949615B1 EP 2949615 B1 EP2949615 B1 EP 2949615B1 EP 15169142 A EP15169142 A EP 15169142A EP 2949615 B1 EP2949615 B1 EP 2949615B1
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Prior art keywords
speed
cable
carriage
load
brake
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EP15169142.5A
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German (de)
English (en)
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EP2949615A1 (fr
Inventor
Drago Pintar
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Uniforest doo
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Uniforest doo
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/48—Control devices automatic

Definitions

  • the object of the invention is a cable winch with automatically controlled regulation of speed of unwinding of a haulage cable.
  • a cable winch of the invention is used as a drive unit of a device for hauling of timber on a poorly accessible terrain. It allows access with a working machine, a tractor or a lorry only from the top of a terrain, so timber must be hauled uphill.
  • Patent document DE4130970 discloses the invention, which provides a control system for an electric motor, arranged to drive a rope drum of a mine winder or a hoist system, which includes a conveyance supported by a rope and which forms an oscillating system.
  • the control system includes a load sensor which monitors the load in the rope, and a rope-length sensor monitoring the length of rope paid out from the rope drum.
  • a motor control unit is responsive to signals from the sensors and calculates setpoints for speed, acceleration, and jerk of the oscillating system.
  • the control unit generates a control signal which is related to a natural oscillation mode of the oscillating system, so as to prevent the excitation of oscillations in the system, and controls a motor drive in accordance with the control signal.
  • Patent document US2005/114001 offers a multiple-sensor system that prevents crown incursion by a traveling block in an oil rig.
  • This system calculates traveling block position, traveling block velocity, and weight supported by the traveling block, and uses this information to calculate emergency stopping positions to prevent crown-out by the traveling block.
  • the system takes all these parameters into consideration when slowing and/or stopping the traveling block when it reaches a crown-out position.
  • Patent document US 4 187 681 describes a hydrostatic winch having a hydraulic drive system with a dual control valve, which adjusts pressure in control lines for varying the speed of lowering and hoisting a load, and a brake for stopping.
  • the load has an overspeed control system, which includes first valve means for relieving pressure in the control lines, and first valve control means, which open the valve to automatically slow the speed of the winch when the load is moving too fast.
  • the braking system also includes a first means, for determining when the speed of the load or winch exceeds a predetermined safe rate, and second means, for detecting the occurrence of an abnormal condition which can cause overspeed.
  • Patent document CN202164072 relates to a winding over-speed protector of a mobile crane.
  • the protector comprises a brake device and a manual brake controller.
  • An operation driver can control the lifting speed and the lifting position of the crane or the speed and the position of an object below through the manual brake controller.
  • the automatic controller automatically brakes or decelerates the lifting device of the crane.
  • Patent document JP2000063086 provides a controller for a hoisting winch which prevents excessive feed of a rope after a hoisting load is landed.
  • a rotation quantity sensor constituting a depth indicator, is arranged in a drum so as to detect a position of a hoisting load.
  • a controller determines that the hoisting load position is the predetermined position or a position below this one, a control signal is outputted to a solenoid proportioning valve.
  • a winch over-winding prevention apparatus consists of a stop switch that is activated when a suspended object is raised or lowered as a hoisting cable, wound around the winch drum, is further taken up or fed out, is hoisted up to a predetermined stop position; and a stop device that stops drive of the winch drum when the stop switch is activated.
  • the subject of the invention is the description of how to measure the force applied on the drum of the pulley by the load, using a very simple device measuring pulses on the wheel pulley 11; the same device also enables us to measure the reeling speed of the hauling cable.
  • the information about the measured force is of key importance in setting of the parameters of the electronics regulator. In this way, the function of weighing of the load which does not measure the actual weight of the load but measures the influence (the influence that the load has on the drum), enables us to obtain information suitable to determine the parameters of the electronics regulator.
  • Document DE 41 30 970 A1 discloses a cable winch with automatically controlled regulation of speed of unwinding of a haulage cable, where a remotely controlled operation of the cable winch is possible and is based on the speed of a drum at which a brake force of the cable winch can be controlled, whereby the speed of a haulage cable that is wound on the drum and led through a pulley and attached to a carriage is regulated by way of a hydraulically operated brake via braking cylinder controlled by a hydraulic proportional valve, wherein an electronic circuit controls the proportional valve and consists of a comparator, a proportional regulator and an adder, wherein in the comparator, the desired speed of the hauling cable and the actual speed of the drum which is detected by the sensor are compared.
  • D1 also appears to disclose that the output of the comparator is connected to the input of the proportional regulator, and that the output signal of the proportional regulator is connected to the adder.
  • Three workers are most frequently needed to manage a cableway. A first worker is located at a site where round timber is fastened, a second worker releases the round timber and a third worker is in charge of lowering the carriage downhill and of lowering the round timber in the upper point.
  • the mass of the round timber to be lowered to the ground is of key importance in pulling a brake.
  • the worker needs to monitor the speed of lowering of the round timber and to adequately react by using a mechanical lever of the brake.
  • the mass of round timber to be lowered can be in a range of up to 1,500 kg. While lowering the carriage the lower worker and the one operating the brake usually need to communicate since the worker operating the cable winch in the lower section of the terrain does not see how rapidly the carriage moves.
  • the embodiment of a cableway with a cable winch with automatically controlled regulation of the speed of unwinding of a haulage cable of the invention allows for a more simple automated process of cableway operation. This embodiment also allows for a remotely controlled operation of the cable winch, wherein the operator does no longer have to manually control the braking force of the cable winch based on an estimated speed of the carriage.
  • the embodiment of the cableway with the cable winch of the invention calls only for two workers in order to keep the same functionality of the cableway.
  • the embodiment of the cableway is schematically shown in Figure 2 .
  • an initial clip and a final clip (CLIP_1 and CLIP_2) need to be arranged.
  • the clips make it possible to release a cable from the carriage when they come in contact with the carriage.
  • the final section of the cable is fixed into the carriage between both clips. It is herewith ensured that the round timber is lifted from the ground during the entire uphill hauling.
  • a cable winch with automatically controlled regulation of speed of unwinding of a haulage cable of the invention is represented in a block diagram in Figure 3 .
  • the task of such cable winch is to automatically regulate the speed of unwinding of a haulage cable 6 and consequently the speed of movement of a carriage 10 along a bearer cable 5.
  • the haulage cable 6 is wound on a drum 2 of a hydraulic winch 8.
  • a brake 3 is fully pulled until a hauling function (winding of the haulage cable onto a drum - haulage of round timber towards the winch) or an unwinding function (unwinding of the haulage cable from the drum - lowering of the haulage cable downhill) is used. If the speed of unwinding of the haulage cable 6 is to be changed continuously, also the force, with which the brake 3 brakes the speed of rotation of the drum 2, needs to be changed continuously.
  • a hydraulically operated brake 3 is used for this purpose and its brake force can be defined by the pressure in a braking cylinder 4.
  • a hydraulic proportional valve 9 is used to change the pressure in the braking cylinder 4 .
  • An electronic circuit 7 is provided to change a reference value of the proportional valve, based on an operating algorithm, which is based on a measured value of movement of the haulage cable 6 that is measured by a sensor 1.
  • the speed of movement of the haulage cable 6 is measured on a pulley 11, through which the haulage cable 6 is led.
  • the pulley 11 is provided with holes that are detected by the sensor 1.
  • the task of the electronic circuit 7 is to measure the speed of movement of the haulage cable 6 when going downhill in the first phase and to influence the pressure in the proportional valve 9 in the second phase.
  • a signal from the sensor 1 and the holes on the pulley 11 are used. While the pulley 11 is rotating the sensor 1 detects a hole in the pulley 11: With the sensor 1 above a hole, the output status of the sensor 1 is logical '0' otherwise the output status is logical '1'. Based on the changing of the logical value of the sensor 1 output, the speed of movement of the haulage cable 6 can be determined by using data on:
  • the electronic circuit 7 can have influence on the speed of movement of an empty carriage and also on the movement of a loaded haulage cable at the top of the cableway where an unknown quantity of round timber (various loads) is lowered.
  • the force of the brake 3 needs to be regulated.
  • the force of the brake depends on various factors such as load mass, terrain inclination, setting of a pre-brake, current speed of the carriage and quantity of the haulage cable on the drum.
  • the electronic circuit 7 also provides for a function of load weighing.
  • the force needed on the braking cylinder 4 for the load to start moving should be determined (a rough value needed for such load on the braking cylinder is thus determined). By determining this force the following factors in the system are done away with: load mass, terrain inclination and pre-brake setting.
  • the pressure in the braking cylinder 4 is gradually increased for weighing purposes. As the pressure is increased, the braking cylinder 4 gets gradually opened. The position of the haulage cable 6 changes during the entire opening interval. When the haulage cable 6 moves, the electronic circuit 7 records the current pressure needed to make the load (attached to the haulage cable 6) start moving. Due to various loads, different pre-settings of the brake 3, different terrains this value can considerably vary between situations.
  • the electronic circuit 7 consists of a comparator 13 of desired speed 12 of the haulage cable 6 and of the actual speed 20 of the carriage 10, and an output of a proportional regulator 14 is connected to the first part of an adder 15 and the second part of the adder - pre-controller 17 is an output of an additional function of weighing (18) a load that is determined on the basis of pulse counts from the sensor of movement 21 that is monitored while the ramp 19 function is controlled, and the output of the additional function of weighing (18) of the load is also a function of changing the proportional parameter of the regulator 14.
  • Such method of weighing the load provides an indication on an approximate pressure value that is needed for the brake 3 to brake very smoothly (pre-control). And yet, the speed of the carriage and the load would remain uncontrolled if only such mode of control (without a regulator) were used.
  • Figure 4 shows a block diagram of a regulator for controlling a speed of the carriage.
  • a regulator for controlling a speed of the carriage.
  • the current data on the speed of movement of the haulage cable 6 are needed apart from the pre-control.
  • a regulation scheme of operating such system contains a P speed regulator with an added pre-control that is determined by the function of load weighing.
  • the used linear P-regulator changes the reference value of the proportional valve 9 on the basis of a difference between the reference and actual speed of movement of the haulage cable 6.
  • a parameter of the P-regulator changes with respect to the mass of the regulated load.
  • the output value of the regulator is limited within the range determined by a proportional hydraulic valve that is controlled via D/A converter.

Claims (3)

  1. Un treuil à câble avec régulation à commande automatique de la vitesse de déroulement d'un câble de traction (6), le fonctionnement du treuil à câble pouvant être télécommandé et étant basé sur la vitesse du chariot (10) à laquelle une force de freinage du treuil à câble peut être commandée, la vitesse du câble de traction (6) enroulé sur un tambour (2) et guidé à travers une poulie (11) et fixé au chariot (10) étant régulée au moyen d'un frein à commande hydraulique (3) par l'intermédiaire d'un cylindre de frein (4), commandé par une soupape proportionnelle hydraulique (9), où un circuit électronique (7) commande la soupape proportionnelle (9) et est composé d'un comparateur (13), d'un régulateur proportionnel (14) et d'un additionneur (15), où dans le comparateur (13), la vitesse souhaitée (12) du câble de traction (6) et la vitesse réelle (20) du chariot (10) qui est détectée par un capteur (1) sont comparées,
    caractérisé en ce que
    la sortie du comparateur (13) est reliée à l'entrée du régulateur proportionnel (14), qui compare le signal de sortie du comparateur (13) avec le signal de la fonction de la pesée (18) de la charge, et où le signal de sortie du régulateur proportionnel (14) et le signal d'entrée d'un pré-contrôleur (17) sont reliés à l'additionneur (15), une fonction supplémentaire de pesée (18) de la charge étant également impliquée dans le signal du pré-contrôleur (17), qui est déterminée sur la base du comptage des impulsions du capteur mobile (21), surveillées tout en changeant la fonction de rampe (19), et où la sortie de la fonction supplémentaire de pesage (18) de la charge est également fonction du changement du paramètre proportionnel du régulateur (14).
  2. Treuil à câble selon la revendication 2,
    caractérisé en ce que
    le circuit électronique (7) peut comparer la valeur souhaitée (12) de la vitesse du chariot (10) et la vitesse réelle (20) mesurée par un capteur (1) sur la poulie (11), et estimer l'inclinaison du terrain et de la masse de chargement sur le chariot (10), le signal de sortie du circuit électronique (7) étant relié à la soupape proportionnelle (9) qui commande le frein (3) par l'intermédiaire du cylindre de frein (4).
  3. Treuil à câble selon les revendications 1 à 3
    caractérisé en ce que
    la poulie (11) est pourvue de trous qui permettent au capteur (1) de détecter la vitesse de rotation de la poulie, sur la base de laquelle sont mesurés la vitesse et le mouvement du câble de traction.
EP15169142.5A 2014-05-27 2015-05-26 Treuil à câble avec régulation contrôlée automatiquement de la vitesse de déroulement d'un câble de traction Active EP2949615B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201400198A SI24711B (sl) 2014-05-27 2014-05-27 Vitel s samodejnim nadzorovanim uravnavanjem hitrosti odvijanja vlečne vrvi

Publications (2)

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EP2949615A1 EP2949615A1 (fr) 2015-12-02
EP2949615B1 true EP2949615B1 (fr) 2018-07-11

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SI (1) SI24711B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110428589A (zh) * 2019-07-29 2019-11-08 精英数智科技股份有限公司 监控方法、装置、设备和存储介质

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI25409A (sl) * 2017-04-13 2018-10-30 Uniforest, D.O.O. Gozdarski vitel s sklopom za merjenje zavorne sile in postopek njegovega delovanja
CN111176156A (zh) * 2019-12-25 2020-05-19 长江水利委员会水文局长江中游水文水资源勘测局 缆道远程现地控制设备
CN114153238A (zh) * 2021-11-30 2022-03-08 中天科技海缆股份有限公司 目标线缆的控制方法和装置、存储介质及电子装置

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Publication number Priority date Publication date Assignee Title
US4187681A (en) * 1978-08-28 1980-02-12 Bucyrus-Erie Company Hydrostatic winch
AU636244B2 (en) * 1990-09-18 1993-04-22 Anglo American Corporation Of South Africa Limited Control system for a mine winder
JP2000063086A (ja) * 1998-06-10 2000-02-29 Hitachi Constr Mach Co Ltd 巻上ウインチの制御装置
US6644629B1 (en) * 1998-10-14 2003-11-11 Hitachi Construction Machinery Co., Ltd. Overwinding prevention device for winch
US7461830B2 (en) * 2002-11-25 2008-12-09 Key Energy Services, Inc Multiple sensor for preventing a crown-block incursion on an oil well rig
CN202164072U (zh) * 2011-06-28 2012-03-14 广东力特工程机械有限公司 一种流动式起重机卷扬过速保护器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110428589A (zh) * 2019-07-29 2019-11-08 精英数智科技股份有限公司 监控方法、装置、设备和存储介质
CN110428589B (zh) * 2019-07-29 2020-08-21 精英数智科技股份有限公司 监控方法、装置、设备和存储介质

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EP2949615A1 (fr) 2015-12-02
SI24711B (sl) 2023-08-31
SI24711A (sl) 2015-11-30

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