EP2910510A1 - Überwachung eines Trag- und Treibmittels einer Aufzugsanlage - Google Patents

Überwachung eines Trag- und Treibmittels einer Aufzugsanlage Download PDF

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Publication number
EP2910510A1
EP2910510A1 EP15156332.7A EP15156332A EP2910510A1 EP 2910510 A1 EP2910510 A1 EP 2910510A1 EP 15156332 A EP15156332 A EP 15156332A EP 2910510 A1 EP2910510 A1 EP 2910510A1
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EP
European Patent Office
Prior art keywords
carrying
monitoring device
cord
elevator installation
contact point
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.)
Withdrawn
Application number
EP15156332.7A
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German (de)
English (en)
French (fr)
Inventor
Mirco Annen
Oliver Berner
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.)
Inventio AG
Original Assignee
Inventio AG
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
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Application filed by Inventio AG filed Critical Inventio AG
Priority to EP15156332.7A priority Critical patent/EP2910510A1/de
Publication of EP2910510A1 publication Critical patent/EP2910510A1/de
Withdrawn legal-status Critical Current

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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
    • B66B7/1223—Checking means specially adapted for ropes or cables by analysing electric variables

Definitions

  • the present invention relates to an elevator installation, in which at least one elevator car or at least one counterweight is moved in opposite directions in an elevator shaft, wherein the at least one elevator car and the at least one counterweight run along guide rails, carried by one or more carrying and propelling means and driven by a traction sheave of a drive unit.
  • the present invention relates in particular to the carrier and propellant, namely a method for monitoring the carrier and propellant means of the elevator installation and a device according to the invention for carrying out this method.
  • the published patent application DE-A1-39 34 654 a serial connection of all individual cords and an ammeter, or, instead of an ammeter, an electronic circuit in which the base resistance of an emitter-connected transistor is measured.
  • the patent US B2-7,123,030 discloses a calculation of the electrical resistance by a measurement of the current voltage by means of a so-called Kelvin bridge and a comparison of the thus determined voltage value with an input reference value.
  • the international publication WO-A2-2005 / 094250 discloses a temperature-dependent measurement of the electrical resistance or the electrical conductivity, in which the different environmental and thus also assumed carrier temperature is taken into account, which can be very different, especially in high elevator shafts.
  • EP-A1-1 275 608 An application of the same applicant as the present application discloses monitoring of the sheath by applying a positive pole of a DC source to the cords, so that in case of a defective sheath a ground contact is made.
  • a problem now is to eliminate the mentioned disadvantages of conventional monitoring devices and to propose a monitoring device for carrier and propellant, which provides more accurate or qualitatively classifiable information about the condition and Thus, a higher level of security for the elevator system is achieved, or costly to early replacement of the carrier and propellant can be avoided.
  • a solution of the problem consists first in the arrangement of a circuit which can be applied to the carrying and blowing agent and comprises at least two electrical resistors or resistive elements having different resistance characteristics. In individual cases, this may be the resistance value itself, but in principle also the tolerance, the maximum power loss, the temperature coefficient or taking into account the same, the dielectric strength, the stability, the (parasitic) inductance, the (parasitic ) Capacity to handle the noise or impulse load or combinations thereof.
  • a first variant of a corresponding arrangement thus provides a support and propellant, which has at least one conductive cord.
  • This supporting and blowing agent is substantially, advantageously coated with an electrically insulating material such as rubber or a polyurethane.
  • an electrically insulating material such as rubber or a polyurethane.
  • different resistances are connected to each other.
  • a further, of the first two mutually different resistors in turn, different resistance is arranged at a contact point at which the carrying and blowing agent passes during operation.
  • This contact point may for example be an arbitrary deflection roller, be it a stationary roller arranged in the elevator shaft or else the or one of the deflection rollers of the counterweight or the elevator car.
  • the deflection rollers usually have.
  • the contact point may be a metallic surface which may be coated, for example, with a highly conductive material such as copper or brass. Also brush contacts, for example in the form of carbon fiber brushes, copper brushes or the like can be used.
  • the use of brushes has the advantage that the brushes cling to a surface of the carrier and propellant, that is, for example, that they exactly follow a contoured or shaped surface, so that the entire surface is detected. It is essential, however, primarily that the contact point is conductive and can be advantageously grounded - in the case of operating the monitoring device with DC - or a voltage to the contact point can be applied - in the case of operating the monitoring device with AC - and in principle a contact to the conductive part or the conductive parts of a carrying and blowing agent is possible when this conductive part of the carrying and blowing agent comes into contact with this contact point.
  • This latter contact between the point of contact, for example, the pulley, and the conductive part or parts of the carrying and propellant may arise, for example, if individual wires of the cords break and subsequently pierce through the sheath. These broken wires strip along the point of contact and thus make electrical contact during the contact time. This can be determined by evaluation of the resulting total resistance or a corresponding current characteristic both an interruption of a cord, a cross or short circuit between cords or damage to the sheath, or piercing individual wires.
  • this contact point is a sliding contact, or a contact point which is arranged, for example, at a small distance to the carrying and blowing agent.
  • This contact point can be any part of the elevator installation on which the suspension element has passed. This can be, for example, a machine console in the region of the drive machine or it can be a component of the cabin or it can also be a safety bar or retainer.
  • This contact point is advantageously arranged in a distance range of about 1mm to 15mm. In an advantageous embodiment, this distance can be adjusted. This ensures that only real damage to the support and propellant lead to a contact, while small Verschleissspuren be ignored.
  • the contact point is of course designed to be electrically conductive.
  • the said contact between the contact point, for example, the deflection roller, and the conductive part or the conductive parts of the support and propellant may also be realized by, for example, the conductive cord of the support and propellant not completely, but only substantially not coated with conductive plastic. There remain juxtaposed conductive points or even entire free parts of the cross-sectional circumference, which extend over the entire unwinding length of the support and propellant and can be in electrical contact with the deflection roller.
  • Another way to make the contact between the cord and the pulley or the contact point with the third resistor is the incorporation of conductive strands in the sheath of the support and propellant. In principle, a carrier and propellant with a conductive sheath is possible, but then preferably an insulation layer between the conductive cord and the conductive sheath.
  • Another variant provides a support and propellant, which has a plurality of parallel conductive cords.
  • This supporting and blowing agent is also encased substantially.
  • the individual cords associated resistor elements, or characteristic resistors are connected.
  • a single further, in turn of the other resistors different resistance arranged, as explained above using the example of a single cord, is arranged at a contact point at which the carrying and blowing agent passes during operation.
  • the mutually different resistors or resistance elements which are arranged at the ends of the conductive cord or at the ends of the support and propellant, are preferably integrated into contacting elements, as described for example in European Publication EP-A1-127 56 08 have been disclosed.
  • the contacting elements disclosed in these documents can be arranged not only at the ends of the carrier and propellant, but optionally also between them.
  • Further contacting elements into which the two mutually different resistances at the ends of the conductive cord or at the ends of the carrying and blowing agent are preferably integrated, are for example in the publications WO-A2-2005 / 094249 .
  • WO-A2-2005 / 094250 or WO-A2-2006 / 127059 disclosed.
  • the different resistance elements may also be connected to the ends of the carrying and blowing means or integrated into these ends. Other arrangements of the resistors are possible. Thus, they can be integrated in the connecting line between the contacting element and a corresponding measuring device.
  • the mutually different resistors or resistance elements are in such a way with a measuring device or connected to a corresponding current source, that depending on the respective error possibility specific total resistances, currents or - with constant held current source - specific voltages to the overall circuit result.
  • the respective measured values can be clearly assigned to a respective damage event.
  • the measurement can be queried both permanently and at intervals or only as needed before and / or during each trip as a corresponding condition for a ride release.
  • design variants of such a monitoring device can be realized, which, in combination with only one or more cords and the corresponding number of mutually different resistances, not only that they have, if necessary, a contact point on which the carrying and blowing agent passes, but they can, if necessary, be configured with multipletechnischmaschines-points.
  • cord breakage As already mentioned, the following cases come into consideration: cord breakage, short circuit (short circuit between two cords), breakdown or combinations thereof.
  • This known or calculated position information is set at the occurrence of a measurement signal at the third resistance arranged in the contact point or at the occurrence of a change in the measurement signal of this third resistance and the occurrence of a change in the measurement signals in the at least two first resistances thus the position of damage to the carrying and propellant.
  • the detection or the calculation of these described values preferably takes place processor-supported and automatically and can be displayed on a display or monitor.
  • the processor is also preferably capable of storing the occurrences of damage and thus creating a damage clutter image.
  • a monitoring device for a carrier and propellant with multiple cords, or a corresponding elevator system it is also possible, preferably also by means of the supporting processor, to evaluate the extent of damage of the entire carrier and propellant with regard to the number of defective locations and with regard to the extent of a respective individual defective location and thus issue a staggered warning message.
  • a carrier and propellant with, for example, 12 cords, one of which is broken, or only rarely and with low intensity cross-circuiting can still be used without hesitation for a certain period of time. This certain grace period is detected by the processor and shortened again or leads to a shutdown of the elevator system, if the extent of damage should expand accordingly or another damage event should be added.
  • Table 1 shows possible measurements of the total resistance in an exemplified circuit example of an inventive monitoring device for two cords A and B.
  • one end of the first cord A has a resistance of 1 ohm and at the other end of this first cord A is an example Resistor of 1.1 ohms arranged.
  • a further resistor of 1.1 ohm is for example arranged and at the other end of this second cord B a further resistor of 1 ohm is arranged by way of example .
  • a fifth resistor of 1.5 ohms is arranged by way of example.
  • the voltage source is assumed to be a DC source with a voltage of, for example, 1 volt.
  • the resistance elements, or resistors are preferably arranged in mirror image. That is, for example, in three cords, the mutually different resistances at the one, adjacent ends of the cords have the characteristics x, y, z, while the resistors at the other, adjacent ends of the cords have the characteristics z, y, x. The sum of the two resistors thus arranged on a single cord remains constant.
  • the disclosed monitoring devices can preferably be combined with a bending change counter, so that a further information in the - preferably processor-assisted - monitoring device flows and thus the determination of the Ablegereife a carrying and propellant is even more reliable.
  • a monitoring device can also be implemented additionally or completely with other electronic components, for example, with capacitors and coils.
  • the frequency, the inductance, the capacitance or combinations thereof are preferably measured.
  • resistive elements which may include as a collective term said electronic components.
  • the measurement may relate to the following current characteristics: the resistance or / and one of the resistance characteristics listed in paragraph [0010], the amperage, the voltage, the frequency, the inductance, the capacitance or combinations thereof.
  • the Fig. 1 shows an elevator system 100, as known from the prior art, for example in a illustrated 2: 1 suspension.
  • an elevator car 2 In an elevator shaft 1, an elevator car 2 is movably arranged, which is connected via a support and propellant 3 with a movable counterweight 4.
  • the support and propellant 3 is driven during operation by means of a traction sheave 5 of a drive unit 6, which are arranged in the uppermost region of the elevator shaft 1 in a machine room 12.
  • the elevator car 2 and the counterweight 4 are guided by extending over the shaft height guide rails 7a and 7b and 7c.
  • the elevator car 2 can serve a top floor door 8, further floor doors 9 and 10 and a lowest floor door 11 at a delivery height h.
  • the elevator shaft 1 is formed by shaft side walls 15a and 15b, a shaft ceiling 13 and a shaft bottom 14 on which a shaft bottom buffer 19a for the counterweight 4 and two shaft bottom buffers 19b and 19c for the elevator car 2 are arranged.
  • the support and propellant 3 is attached to a fixed attachment point or Tragstofffixige 16 a to the shaft ceiling 13 and guided parallel to the shaft side wall 15 a to a support roller 17 for the counterweight 4. From here again via the traction sheave 5, to a first deflection or support roller 18a and a second deflection or support roller 18b, the elevator car 2 nieschlingend, and to a second stationary attachment point or Tragstofffixtician 16b on the shaft ceiling 13th
  • a first and a second contacting element 20a and 20b are respectively arranged at the respective ends of the carrying and propelling means 3 in the vicinity of the first stationary fastening point or supporting-medium fixing point 16a and in the vicinity of the second stationary fastening point or suspension-fixing point 16b.
  • a symbolically illustrated test circuit 23 with a test current IP can be applied, with the example, a simple continuity test of the supporting and propellant 3 can be realized.
  • the Fig. 2 schematically shows a monitoring device 200a in an elevator installation 100a.
  • a support and propellant 3a which consists essentially of a cord 21 and a casing 22 which substantially encloses this cord 21, a respective contacting element 20c or 20d is connected to its respective ends.
  • These contacting elements 20c and 20d preferably each have a resistor R1 or R2 integrated in them, through which a test circuit 23a with a voltage source Ua and a test current IPa can be applied.
  • the test circuit 23a further comprises a ground 24 and a measuring device 25, and an optional connection to a contact point P - for example, a deflection roller over which the support and propellant 3a runs - with a third resistor R3.
  • the resistors R1-R3 have different current and resistance characteristics, so that, depending on a respective damage event, the measuring device 25 measures a classifiable measured value which allows a diagnosis or a staggered warning or shutdown of the elevator installation 100a.
  • the test circuit 23a can also be guided only by contacting the ends of the cord 21 and the contact point P. This makes it easy to detect damaged areas in the carrying and blowing agent.
  • the grounding 24 may take place at another suitable location of the plant.
  • the contact point P can be connected directly to earth. This can also be defined multiple contact points in the elevator system, which can recognize each for themselves defective locations in the carrying and propellant.
  • a support and propulsion means 3 ' has two cords 21' and 21 ", which are enveloped by a casing 22 '.
  • a corner or a side of the elevator car 2 is shown in perspective and symbolically, so that it can be seen by way of example that the support and propellant 3 '- and preferably a second support and propellant, not shown in greater detail, on the opposite side of the elevator car 2 - the elevator car 2 is guided in an undercut manner via two deflection or support rollers 27a and 27b 27b form two optionally available contact points P1 and P2, which - symbolically represented - are each connected to a resistor RP 'and RP ".
  • the cords 21 'and 21 "at their respective ends are also advantageously connected to resistors RCa and RCa' for the cord 21 'and resistors RCb and RCb' for the cord 21".
  • the characteristics of the resistors RCa, RCa ', RCb and RCb', and optionally the resistors RP ', RP "are all different from each other or the resistors RCa, RCb and RCa', RCb 'at the ends of the cords 21' and 21" are arranged in mirror image with respect to their parameters. That is, the characteristics of the resistors RCa and RCb ', RCb and RCa' may be identical.
  • the ends of the suspension element are connected via the respective resistance elements RCa and RCb 'or RCb and RCa' to the measuring device 25 '.
  • FIG. 2a symbolically representing the damage event of a cross-circuit Qsch at the optional contact point P1, by indicating that the cords 21 'and 21 "are no longer spaced apart from one another in the casing 22' but approach each other, for example, by a damaged casing 22 ' that they get in contact with each other.
  • the damage event of an impending cord break Cb is represented symbolically.
  • the cord 21 begins to untwist its individual strands 26, which protrude from the casing 22' and thus initiate contact with the deflecting or carrying roller 27b or on its holder.
  • a monitoring of the contact points P1, P2 can be carried out in the illustrated manner self-responding without resistors RCa, RCa ', RCb and RCb'.
  • FIG. 3 is another embodiment variant of a monitoring device 200b for an indicated elevator system 100b shown schematically.
  • a support and propellant 3b has four cords 21a-21d, which are co-covered by a sheath 22a. At the ends of the cords 21a-21d there is respectively a contacting element 20e or 20f arranged.
  • a contacting element 20e or 20f arranged in each of these contacting elements 20e and 20f.
  • four resistors R1 ', R3', R5 'and R7' or R2 ', R4', R6 'and R8' are integrated, which are connected to a test circuit 23b with a voltage source Ub, a Test current IPb, a ground 24 'and a measuring device 25a are connected.
  • an optional contact point P 'with a resistor R9' is connected to the test circuit 23b.
  • the resistors R1'-R9 ' all have different current characteristics or are optionally arranged in mirror image. That is, for example, the resistor R1 'a current characteristic w, the resistor R3' a current characteristic x, the resistor R5 'a current characteristic y and the resistor R7' can have a current characteristic z, while the resistor R2 'The current characteristic z, the resistor R4' the current characteristic y, the resistor R6 ', the current characteristic x and the resistor R8', the current characteristic w has.
  • FIG. 4 schematically shows how a further embodiment variant of a monitoring device 200c is arranged for an indicated elevator installation 100c with a support and propellant 3c.
  • the support and propellant 3c has 12 cords 21a'-211 ', which are all wrapped together by a sheath 22b.
  • a contacting element 20g is arranged, into which resistors R1 ", R3", R5 “, R7”, R9 “, R11”, R13 “, R15”, R17 “, R19” , R21 “and R23” are preferably integrated, each individual resistor associated with one of the cords 21a'-211 '.
  • a second contacting element 20h is arranged, into which, analogous to the first contacting element 20g, resistors R2 ", R4", R6 “, R8", R10 “, R12”, R14 “ R16 “, R18”, R20 “, R22” and R24 "are preferably also associated with each of the cords 21a'-211 '.
  • the resistors R1 "-R24" are connected to a test circuit 23c having a test current IPc.
  • the test circuit 23c further includes a voltage source Uc, a ground 24 "and a measuring device 25b. Also connected to the test circuit 23c is an optional pad P" with a resistor R25 ".
  • the resistors R1 "- R23" with odd reference number are preferably arranged with respect to their current characteristics in mirror image to the resistors R2 “-R24" with a straight reference number.
  • the resistor R25 " is preferably again selected differently from these twelve current characteristics.
  • the ground 24 can, as in the example of Fig. 2 designed to be arranged at any location of the system.
  • the contact point P can be connected directly to the ground.
  • contact points in the elevator installation can also be defined, which each can detect defects in the support and propellant that are defective in interaction with the monitoring device.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP15156332.7A 2009-12-21 2010-12-10 Überwachung eines Trag- und Treibmittels einer Aufzugsanlage Withdrawn EP2910510A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15156332.7A EP2910510A1 (de) 2009-12-21 2010-12-10 Überwachung eines Trag- und Treibmittels einer Aufzugsanlage

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09180234 2009-12-21
EP15156332.7A EP2910510A1 (de) 2009-12-21 2010-12-10 Überwachung eines Trag- und Treibmittels einer Aufzugsanlage
EP10787794.6A EP2516313B1 (de) 2009-12-21 2010-12-10 Überwachung eines trag- und treibmittels einer aufzugsanlage

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP10787794.6A Division-Into EP2516313B1 (de) 2009-12-21 2010-12-10 Überwachung eines trag- und treibmittels einer aufzugsanlage
EP10787794.6A Division EP2516313B1 (de) 2009-12-21 2010-12-10 Überwachung eines trag- und treibmittels einer aufzugsanlage

Publications (1)

Publication Number Publication Date
EP2910510A1 true EP2910510A1 (de) 2015-08-26

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ID=42110046

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15156332.7A Withdrawn EP2910510A1 (de) 2009-12-21 2010-12-10 Überwachung eines Trag- und Treibmittels einer Aufzugsanlage
EP10787794.6A Revoked EP2516313B1 (de) 2009-12-21 2010-12-10 Überwachung eines trag- und treibmittels einer aufzugsanlage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10787794.6A Revoked EP2516313B1 (de) 2009-12-21 2010-12-10 Überwachung eines trag- und treibmittels einer aufzugsanlage

Country Status (9)

Country Link
US (1) US8686747B2 (zh)
EP (2) EP2910510A1 (zh)
CN (1) CN102933482B (zh)
AU (1) AU2010342458B8 (zh)
BR (1) BR112012017169A2 (zh)
CA (1) CA2778870C (zh)
CO (1) CO6511265A2 (zh)
ES (1) ES2541709T3 (zh)
WO (1) WO2011085885A2 (zh)

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EP2516313B1 (de) 2015-04-08
CN102933482A (zh) 2013-02-13
US20110148442A1 (en) 2011-06-23
BR112012017169A2 (pt) 2017-09-19
CA2778870A1 (en) 2011-07-21
US8686747B2 (en) 2014-04-01
CA2778870C (en) 2018-05-08
AU2010342458B8 (en) 2015-10-22
ES2541709T3 (es) 2015-07-23
CN102933482B (zh) 2016-04-20
AU2010342458A1 (en) 2012-05-03
AU2010342458B2 (en) 2015-09-17
CO6511265A2 (es) 2012-08-31
WO2011085885A2 (de) 2011-07-21
WO2011085885A3 (de) 2013-04-25
AU2010342458A8 (en) 2015-10-22

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