EP3628631A1 - Procédé de détection de l'état des moyens porteurs - Google Patents

Procédé de détection de l'état des moyens porteurs Download PDF

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Publication number
EP3628631A1
EP3628631A1 EP19186191.3A EP19186191A EP3628631A1 EP 3628631 A1 EP3628631 A1 EP 3628631A1 EP 19186191 A EP19186191 A EP 19186191A EP 3628631 A1 EP3628631 A1 EP 3628631A1
Authority
EP
European Patent Office
Prior art keywords
suspension element
suspension
counterweight
current
sub
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.)
Granted
Application number
EP19186191.3A
Other languages
German (de)
English (en)
Other versions
EP3628631B1 (fr
Inventor
Hubert Göser
Jan-Henning Quass
Sebastian JIRAUSCHEK
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.)
ContiTech Antriebssysteme GmbH
Original Assignee
ContiTech Antriebssysteme GmbH
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Publication date
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Publication of EP3628631A1 publication Critical patent/EP3628631A1/fr
Application granted granted Critical
Publication of EP3628631B1 publication Critical patent/EP3628631B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1215—Checking means specially adapted for ropes or cables

Definitions

  • the invention relates to a method for detecting the state of wear of suspension elements made of elastomeric material within a suspension or elevator system, which has a cabin or a suspension device, which is connected to a suspension element running via deflection or drive rollers with a counterweight, the suspension means in have tension members or reinforcing elements embedded in their longitudinal direction in the belt body, preferably designed as twisted or beaten cords, selected physical properties of the suspension means being determined and stored as initial values after a running-in phase of the suspension or elevator system and subsequently periodically or permanently corresponding physical during operation Properties of the suspension element are related to the initial values as current values and, if predetermined threshold values for the differences between the initial values and current values are exceeded, a warning signal is given or w. is asked to replace the suspension element.
  • the invention also relates to an apparatus for performing the method.
  • the suspension elements of the cabins are subject to strict regulations regarding their operational safety and tensile strength.
  • the tensile strength can be reduced during the lifespan of an elevator due to subsidence, material wear or fatigue within the suspension element.
  • Examination standards provide corresponding regulations. Appropriate inspection organizations carefully check lift systems for compliance with these regulations and legal requirements.
  • suspension element As soon as a suspension element no longer meets the legal requirements, it must be replaced, i.e. stored, which means that it is removed from the elevator system and replaced with a new suspension element. This point in time is the so-called “discard maturity”.
  • the suspension elements mentioned here are those which consist of elastomeric material and have embedded tension members or reinforcing elements, that is to say, for example, carrying straps or carrying straps shaped in a special way.
  • the optical integrity of the suspension element must first be checked and ensured.
  • the strength of metallic tensile elements inside the plastic or rubber matrix can e.g. B. by means of resistance measurement.
  • the individual tension members are electrically connected to one another. A change in the cross-section of the tension member due to friction (fretting) or broken breaks e.g. the resistance in the electrical conductor, which can be used as an indicator for discard.
  • the US 2004/0046540 A1 discloses a method in which wear of a rope or also of an elevator belt containing ropes / suspension means with a plurality of ferromagnetic strands or cords can be checked in that the Changes in the magnetic field strength or changes in the magnetic flux can be detected.
  • a check during operation has the disadvantage that relatively complicated devices and apparatus must be used for magnetization or for determining the change in field strength.
  • the EP 0 845 672 A1 also discloses a magnetic test method during operation, which allows a test of the magnetic properties of a magnetizable elongate object, such as an elevator belt, Hall sensors determine any changes in the diameter of the tension members based on the changes in the magnetic properties.
  • This device also requires a relatively high level of constructional or sensitive equipment.
  • the application is also limited to suspension elements with ropes / cords made of magnetizable or electromagnetically influenceable materials as tension members.
  • the object of the invention was therefore to provide a method with which a reliable determination of the state of wear of tension or support belts in the form of suspension means reinforced with tension members, in particular elevator belts, is possible and which only requires a relatively small amount of equipment / construction for the associated ones Includes devices.
  • the length and / or the elastic elongation of the suspension element are determined and stored during a defined lifting operation.
  • the current values of the length of the suspension element and / or the elastic elongation of the suspension element are then periodically or permanently related to the initial values, the positions of both the car and the counterweight within the elevator system or in the elevator shaft being measured using position measuring devices determined and from this both the initial length L beginning and the current length L current of the suspension element as well as the different initial travel paths S K of the cabin and the counterweight So resulting from elastic expansion of the suspension element are determined.
  • run-in new condition means the condition of the carrying or elevator system and the traction means / traction belt that has arisen after a series of several hundred load cycles due to settlement and running-in of the system.
  • a one-time upward or downward stroke is to be understood here as a load cycle.
  • the pull strap i.e. the suspension element
  • the connection between the strength members or tensile members and the polymer or rubber matrix and the running into the deflection and drive rollers has set so far that essential changes in state only form after a much longer period of time.
  • the change in length of the suspension element serves as an indicator of the aging or degradation of the load-bearing capacity or tensile strength and the achievement of the point of discard.
  • this method can be used to determine the position of the area to be discarded.
  • no complex "magnetization" or a voltage present in the suspension element is necessary.
  • suspension element A precautionary and limited use of the suspension element is no longer necessary, as the state of wear or wear, i.e. discard maturity can be determined permanently or as required.
  • the change in length is therefore a measure of the change in the tensile / elongation behavior of the suspension element, ie for the aging of the suspension element.
  • a certain number of load cycles or a certain operating time can also be specified, after which the ratio of the originally measured length and the corresponding length of the suspension element that is then present is measured in each case.
  • Another indicator of the readiness for discarding is the change in the initial ratio of the travel paths of the cabin S K and counterweight So over time, ie the time-dependent change in S K / So
  • the ratio of the travel paths / travel paths S K-Beginning / S G- Start that is being developed is viewed and assessed in relation to the current ratio of the travel paths of the cabin and counterweight S K-current / S G-current during operation.
  • the cabin and counterweight are moved by the same suspension element, which is guided between these two elements via several deflection rollers / drive rollers.
  • the cabin and counterweight thus "hang" at one end of the same suspension element or elevator belt / elevator belt.
  • the elastic expansion of the suspension means that the traversing paths, i.e. the lifting or lowering movements of the cabin and counterweight, are slightly different during lifting operations.
  • the ratio of these two travel paths can therefore serve as a measure of the elastic expansion of the suspension element, especially when accelerating from the idle state, for example when starting off.
  • This change can be determined using the method according to the invention and can be assessed using predefined values / threshold values. When a certain threshold value is exceeded, the discard is also reached.
  • An advantageous further development consists in that the initial and the current values of the lengths and the elastic expansion of the suspension element are determined and calculated in the case of a predetermined, defined, identical state of the suspension or elevator system.
  • the position measurements can be compared very well and the differences can be given a high degree of accuracy.
  • a further advantageous embodiment is that the positions of both the cabin and the counterweight are recorded or stored temporarily or continuously. With such a procedure, very precise load collectives can be created over time, which result in extraordinarily precise predictions about the maturity of the cast in the further operation of the elevator system.
  • a further advantageous embodiment of the method consists in that a percentage frequency of certain identical or similar lifting processes is determined and correlated with the determined differences and / or predetermined threshold values.
  • the maximum change in length in the corresponding areas is compared with a determined and stored limit value and a decision is made about the readiness for discarding.
  • An elevator system is particularly suitable for carrying out the method, in which the elevator system has, for example, at least one separate position measuring device within an elevator shaft, preferably in the form of measuring ropes or measuring belts guided over deflection rollers, wherein in at least one of the deflection rollers Position measuring device, an incremental rotary encoder is provided and the cabin and / or counterweight are articulated on the measuring ropes or measuring belts via drivers.
  • the elevator system has, for example, at least one separate position measuring device within an elevator shaft, preferably in the form of measuring ropes or measuring belts guided over deflection rollers, wherein in at least one of the deflection rollers Position measuring device, an incremental rotary encoder is provided and the cabin and / or counterweight are articulated on the measuring ropes or measuring belts via drivers.
  • a further advantageous embodiment of the method is that a separate position measuring device is provided for the positions of either the cabin or the counterweight, with an incremental rotary encoder in one of the simple parts for determining the position of the other part (cabin or counterweight) Deflection rollers of the suspension element is provided. This simplifies the construction of the elevator system, since no "double" separate position measuring devices for the car and counterweight are required.
  • a coded magnetic tape is mounted in an elevator shaft and a sensor attached to the car or to the counterweight is guided along the magnetic tape.
  • Fig. 1 shows in a basic representation a suspension element 1 which is provided with tension members or strength members 2 running in the longitudinal direction.
  • tension members or strength members 2 running in the longitudinal direction.
  • Each of these Strength member consists of beaten filaments 20, such as metal, as detailed in the Figure 2 are shown.
  • Fig. 2 shows the geometric change that occurs over time of a reinforcement 2 made of twisted / beaten metallic filaments 20 within a suspension element.
  • the geometric change of the individual strength members arises, for example, from the fact that friction / wear of the filaments 20 twisted together / twisted, as shown in the left part of FIG Figure 2 are shown in their original position, by the movement of the individual filaments relative to one another during operation and the resulting "fretting" can be changed in their shape and position.
  • Fig. 3 schematically shows an elevator system 10 according to the invention which is particularly suitable for carrying out the method according to the invention.
  • the elevator system 10 has a cabin 3 which is connected to a suspension means 1 running over deflection rollers 4 and a drive roller 5 with a counterweight 6.
  • the elevator system also has two separate position measuring devices 7, 8 within the elevator shaft, which is not shown here.
  • a measuring cable 11 guided over deflection rollers 9 is provided in each of the position measuring devices 7, 8, a measuring cable 11 guided over deflection rollers 9 is provided.
  • the lower pulleys are located under the floor of the elevator shaft and are not shown here.
  • the pulleys 9 of the Position measuring devices 7. 8 are equipped with a known incremental rotary encoder (not shown here in more detail) and, depending on the design, can detect minimal rotary movements and thus lifting movement of cabin 3 or counterweight 6.
  • the cabin and / or counterweight are articulated on the measuring ropes 11 via drivers 12.
  • This is a so-called shaft copying, which is known as such in the field, but has previously been used for pure height measurements or controls of the lifting movement and not in duplicate and within the method according to the invention.

Landscapes

  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP19186191.3A 2018-08-28 2019-07-15 Procédé de détection de l'état des moyens porteurs Active EP3628631B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018214511.3A DE102018214511A1 (de) 2018-08-28 2018-08-28 Verfahren zur Detektion des Zustands von Tragmitteln

Publications (2)

Publication Number Publication Date
EP3628631A1 true EP3628631A1 (fr) 2020-04-01
EP3628631B1 EP3628631B1 (fr) 2022-04-27

Family

ID=67296993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19186191.3A Active EP3628631B1 (fr) 2018-08-28 2019-07-15 Procédé de détection de l'état des moyens porteurs

Country Status (2)

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EP (1) EP3628631B1 (fr)
DE (1) DE102018214511A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0845672A1 (fr) 1996-11-29 1998-06-03 Noranda Inc. Appareil pour la surveillance indexé des câbles métalliques
JP2001192183A (ja) * 2000-01-07 2001-07-17 Hitachi Ltd 合成繊維ロープの劣化状態判別方法およびエレベータ
US20040046540A1 (en) 1999-03-29 2004-03-11 Robar Terry M. Method and apparatus for detecting elevator rope degradation using electrical energy
US20110172932A1 (en) * 2008-07-18 2011-07-14 Herbert Bachmann Method and device for determining the replacement state of wear of a support means of an elevator
DE102012104206A1 (de) * 2012-05-15 2013-11-21 K-Solutions Gmbh Aufzugsanlage mit einem Schachtkopiersystem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0845672A1 (fr) 1996-11-29 1998-06-03 Noranda Inc. Appareil pour la surveillance indexé des câbles métalliques
US20040046540A1 (en) 1999-03-29 2004-03-11 Robar Terry M. Method and apparatus for detecting elevator rope degradation using electrical energy
JP2001192183A (ja) * 2000-01-07 2001-07-17 Hitachi Ltd 合成繊維ロープの劣化状態判別方法およびエレベータ
US20110172932A1 (en) * 2008-07-18 2011-07-14 Herbert Bachmann Method and device for determining the replacement state of wear of a support means of an elevator
DE102012104206A1 (de) * 2012-05-15 2013-11-21 K-Solutions Gmbh Aufzugsanlage mit einem Schachtkopiersystem

Also Published As

Publication number Publication date
DE102018214511A1 (de) 2020-03-05
EP3628631B1 (fr) 2022-04-27

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