EP3003950A1

EP3003950A1 - Elevator system

Info

Publication number: EP3003950A1
Application number: EP14728868.2A
Authority: EP
Inventors: Florian Dold
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2013-05-28
Filing date: 2014-05-27
Publication date: 2016-04-13
Also published as: AU2014273202B2; CN105246814A; CA2910989A1; US20160101964A1; AU2014273202A1; WO2014191372A1; HK1216878A1; BR112015029409A2

Abstract

The invention relates to a method for checking a monitoring system in an elevator installation, comprising at least one of the steps: a) checking whether the traction carriers are connected to the monitoring device; b) checking whether the suspension means are connected to the monitoring device; c) checking whether an electrical resistance of a traction carrier is within a range; d) checking whether a difference of an electrical resistance of a traction carrier from an electrical resistance of a traction carrier of the same suspension means is below a threshold value; and e) checking whether a difference of an electrical resistance of a traction carrier from an electrical resistance of a traction carrier of a different suspension means is below a threshold value; wherein the method is carried out before the elevator installation is commissioned after being installed.

Description

elevator system

The present invention relates to a method for checking a

Monitoring system in an elevator system.

In elevator systems, steel cables have been conventionally used for carrying and / or driving an elevator car as suspension means. According to one

Further development of such steel cables are also belt-like support means, which have tension members and a jacket arranged around the tension members used. However, such belt-like support means can not be monitored in a conventional manner, because the tension members, which determine a breaking load of the suspension element, are not visible through the sheath.

To monitor such tension members in belt-like suspension means, a test current can be applied to the tension members. In the circuit thus formed or in a plurality of circuits thus formed, a current flow, a voltage, an electrical resistance or an electrical conductivity is measured. On the basis of a size measured in this way, it is possible to deduce an integrity or a degree of wear of the suspension element. Namely, reduces the diameter of a tension member by fractures of individual wires or by metallic abrasion, the electrical resistance of this tension member increases.

The patent US7123030B2 discloses such a method for determining a degree of wear of a belt-like suspension means. Based on a specific electrical resistance of electrically conductive tension members is closed on a breaking force of the suspension element.

In such a monitoring method described in the prior art

However, only a statement about the condition of a suspension element during operation of the elevator installation can be made. Therefore, it is desirable to generate more comprehensive information about the condition of a suspension.

It is therefore an object of the present invention to provide a method which provides further relevant information regarding the monitoring of a Can provide support means. Such a method should also be realized with simple and inexpensive means.

To solve this problem, a method for checking a

Monitoring system proposed in an elevator system. The monitoring system comprises at least one support means and a monitoring device for monitoring a Ziistandes the support means, wherein the support means comprises electrically conductive tension members, which are surrounded by an electrically insulating jacket. The method includes at least one of the steps of: a) checking that the tension members are electrically connected to the monitoring device; b) checking that the support means are electrically connected to the monitoring device; c) Checking whether an electrical resistance of a tension member or several interconnected tension members is within a range; d) Check whether a deviation of an electrical resistance of a

Zugträgers or interconnected tension member of an electrical resistance of a tension member or more interconnected tension members of the same support means is below «a first threshold; and e) Checking whether a deviation of an electrical resistance of a

Zugträgers or interconnected Zugträger of an electrical

Resistance of a tension member or a plurality of interconnected tension members of another suspension means below a second threshold Hegt; wherein the method is performed before the elevator installation is taken into an operation intended for the elevator installation after installation, and the elevator installation is only released for the intended operation if no deficiencies have been found during the checking. Such a method for checking a monitoring system has the advantage that installation errors of the monitoring system and also defects in the installed material can be reliably detected before the elevator installation is released for the intended operation. This ensures that the monitoring system, which performs a monitoring of a state of a suspension element during operation of the elevator installation, is installed correctly before the elevator system is released for the intended operation. This ensures that the

Monitoring device at the beginning of a monitoring of a state of the

Supporting means in the elevator installation reference values of intact and correct

connected support means can determine what the further course of

Monitoring the suspension is of great importance. The proposed method can also prevent incorrectly installed monitoring systems, for example not completely connected to the monitoring device

Support means of an elevator system, not even released for a designated operation of the elevator system. This review therefore allows reliable and safe monitoring of the suspension in an elevator installation from the start of operation of the elevator system.

The term "installation" in this context means that certain

Components of the lift system are reinstalled, replaced or serviced. The method proposed here can therefore take place in the case of a newly installed elevator installation before its first release, or else in an already existing elevator installation on which an installation, that is, for example, an exchange of a component, has taken place.

The term "intended operation" in this context means an operation of

Elevator installation for which the elevator installation is approved and / or designed. An installation operation or a maintenance operation of an elevator installation is accordingly not an intended operation in the sense of this method.

In an exemplary embodiment, the method comprises at least two or at least three or at least four or five of the verification steps a) to e). The more verification steps are performed, the more potential defects can be excluded prior to commissioning the elevator system. Thus everybody increases additional verification step reliability or reliability of the

Elevator installation and its monitoring system, whereby a sequence of checking steps is freely selectable. For example, the verification step a) may be performed first, followed by the verification step b), followed by the verification step c). However, these exemplary verification steps may be done in any other possible order.

In an exemplary embodiment, there is a deficiency in the verification step a) if less than a predetermined number of tensile carriers with the

Monitoring device are electrically connected. In a preferred

Exemplary embodiment corresponds to the predetermined number Zugträger all tension members of the elevator system. In an alternative embodiment, the predetermined corresponds

Number of tension members a certain proportion of all tension members of the elevator installation, for example at least 40% or at least 60% or at least 80% of all tension members of the elevator installation.

The checking step a) ensures that a defined minimum number of all tension members of an elevator installation are electrically connected to the monitoring apparatus before the elevator installation is released for its intended operation. Thus, faulty connected or disconnected tension members can be reliably detected.

In an exemplary embodiment, there is a deficiency in the verification step b) if less than a predetermined number of suspension means with the

Monitoring device are electrically connected. In an advantageous

Further development corresponds to the predetermined number of support means all suspension means of the elevator system. In an alternative embodiment, the predetermined corresponds

Number of suspension means a certain proportion of all suspension means of the elevator installation, for example at least 40% or at least 60% or at least 80% of all suspension means of the elevator installation.

The execution of the verification step b) has the advantage that it can be reliably determined how many suspension means with the

Monitoring device are electrically connected. This can be prevented that certain suspension elements of an elevator installation are not monitored in an unintentional manner by the monitoring device.

In an exemplary embodiment, there is a deficiency in the verification step c) when the electrical resistance is outside the range. In an advantageous development, the area has a lower limit, which corresponds to an electrical resistance of a tension member or a plurality of interconnected Ziigträger having a first length which is smaller than a length of Ziigträger, and the area has an upper limit, which electrical resistance of a tension member or more Ziigträger interconnected with each other with a second length which is greater than a length of the tension members corresponds.

The implementation of the verification step c) has the advantage that false suspension elements installed in the elevator installation, for example suspension elements which are too long or too short or also suspension means with not provided tension members, can be detected. In addition, if necessary, electrical resistances, which are connected to the monitoring device instead of suspension means, can be detected. Likewise, by this monitoring step, a gross defect of the tension members of a suspension means can be detected, such as a broken or heavily damaged tension members.

In an advantageous development, the first length is more than 40%, preferably more than 60%, particularly preferably more than 80% of the length of the tensile carriers, and the second length is less than 250%, preferably less than 167%, particularly preferably less than 125% of the length of the tension members. By narrowing down the first and second lengths with respect to a defined length of a tension member of the elevator installation, it can be achieved that the largest possible number of incorrectly installed or defective suspension elements can be detected.

In an exemplary embodiment, there is a deficiency in the verification step d) when the deviation is above the first threshold. In a preferred development, the first threshold value is less than 15%, particularly preferably less than 10%, particularly preferably less than 5%, of an average or predetermined electrical resistance of the tensile carrier or of one another interconnected tension member.

The implementation of the verification step d) has the advantage that damage to a suspension means can be detected in a reliable manner. It occurs, for example, the case that support means are stored in a pit before installing them. If water accumulates in this pit, it may cause rust damage to the tension members of the suspension element. Such rust damage to the tension members change the electrical properties of the tension members. By the

Verification step d) such deviations of the electrical properties of the individual tensile carriers can be reliably detected. Thus, it can be prevented by the method proposed here that defective suspension means in an elevator system reach the intended operation of the elevator installation.

In an exemplary embodiment, there is a deficiency in the verification step e) if the deviation is above the second threshold. In an advantageous development, the second threshold value is less than 15%, preferably less than 10%, particularly preferably less than 5%, of an average or predetermined electrical resistance of the tension member or of the tension members connected to one another.

The verification step e) is similar to the verification step d), a

Check for damage to individual tension members in the suspension elements. By comparing electrical properties of Ziigträgern different suspension means can also be found if all the tension members of a suspension means are equally damaged. Then namely this same damage occurs only in a comparison with train orders of other support means.

The check for a deviation of an electrical resistance in the

Verification steps d) and e) can be done in different ways. For example, a direct comparison of the electrical resistances of two traction carriers under review can take place. Alternatively, a deviation of a tension member from an average of a group of Zugträgem be determined, in a further embodiment, a deviation from an electrical resistance of a tension member to a predetermined value. Depending on the design of the Elevator installation and specification of the verification process can be selected here a suitable variant.

In an exemplary embodiment, at least one suspension element is installed or maintained in the elevator installation during installation. Such a method has the advantage that newly installed suspension means or exchanged suspension means can be checked before the elevator installation is released for the intended operation.

In an exemplary embodiment, during installation, the

Monitoring device serviced or installed. Such a method has the advantage that after work on the monitoring device, the monitoring system can be checked before the elevator system is released for the intended operation.

The method disclosed here for checking a monitoring system in an elevator installation can be used in different types of elevator installations. For example, elevator systems with or without shaft, with or without counterweight, or elevator systems with different gear ratios can be used. Thus, any monitoring system with support means comprising electrically conductive tension members surrounded by an electrically insulating jacket can be checked by the method disclosed herein.

The invention will be explained symbolically and by way of example with reference to figures. Show it:

Figure 1 shows an exemplary embodiment of an elevator system;

Figure 2 shows an exemplary embodiment of a support means; and

FIG. 3 shows an example flowchart for checking a

Monitoring system s.

The elevator installation 40 illustrated schematically and by way of example in FIG. 1 includes an elevator car 41, a counterweight 42 and a suspension element 1 and a traction sheave 43 with associated drive motor 44. The traction sheave 43 drives the support means 1 and thus moves the elevator car 41 and the counterweight 42 gegengleich. The drive motor 44 is controlled by an elevator control 45. The cabin 41 is designed to receive people or goods and to transport between floors of a building. Cabin 41 and counterweight 42 are guided along guides (not shown), in the example the cab 41 and counterweight 42 are each suspended from idlers 46. The suspension element 1 is at a first

Fixed suspension means fastening device 47, and then first performed to the support roller 46 of the counterweight 42. Then the suspension element 1 is placed over the traction sheave 43, guided around the support roller 46 of the cabin 41, and finally connected by a second suspension means fastening device 47 with a fixed point. This means that the support means 1 with a higher speed corresponding to a cape over the drive 43, 44 runs, as the car 41 and counterweight 42 move. In the example, the wrap factor is 2: 1.

A loose end 1 .1 of the suspension element 1 is provided with a contacting device 2 for temporary or permanent electrical contacting of the tension members and thus for monitoring the suspension element 1. In the example shown, such a contacting device 2 is arranged at both ends 1. 1 of the suspension element 1. In an alternative embodiment, not shown, only one contacting device 2 is arranged on one of the support means ends 1.1, and the tension members on the other

Tragmittelende 1.1 are electrically connected. The Tragmittelenden 1.1 are no longer burdened by the tensile force in the suspension element 1, as this tensile force is already passed through the suspension means fastening devices 47 into the building. The contacting devices 2 are thus in a non-overrun area of the

Tragmittels 1 and outside the loaded area of the support means 1 arranged.

In the example, the contacting device 2 is connected at one end of the support means 1.1 with a monitoring device 3. The monitoring device 3 interconnects the tension members of the suspension element 1 as electrical resistors in an electrical circuit for the determination of electrical resistances. The

Monitoring device 3 is also connected to the elevator control 45. Thereby, a signal or a measured value from the monitoring device 3 to the

Elevator control 45 are transmitted to the state of the support means 1, as determined from the monitoring device 3, in a control of the elevator 40 to

consider.

The elevator installation 40 shown in FIG. 1 is exemplary. Other capping factors and arrangements, such as counterweights without counterweight, are possible. The contact ierungsvorrichtung 2 for Kontaktierimg the support means 1 is then

arranged according to the placement of the support means fastening devices 47.

FIG. 2 shows a section of an exemplary embodiment of a suspension element 1. The support means 1 comprises a plurality of mutually parallel electrically conductive tension members 5, which are enveloped by a jacket 6. To the electric

Contacting the tension members 5, the jacket 6 can be pierced or removed, for example, or the tension members 5 can also frontally of a

Kontaktienmgsvorrichtung 2 are electrically contacted.

In this example, the suspension element is equipped with longitudinal ribs on a traction side. Such longitudinal ribs improve a traction of the suspension element 1 on the traction sheave 43 and also facilitate lateral guidance of the suspension element 1 on the traction sheave 43. However, the suspension element 1 can also be configured differently, for example without longitudinal ribs, or with a different number or different

Arrangement of the tension members 5. It is essential for the invention that the tension members 5 are designed to be electrically conductive.

FIG. 3 shows an example flow chart for carrying out a method for

Review of a monitoring system shown. In this example, the process I corresponds to an installation while the process V2 corresponds to a designated operation. The condition ZI symbolizes a defect. The checking steps a) to e) are all carried out in sequence in this exemplary embodiment. At each check step, it is decided whether there is a defect (y) or whether there is no defect (x). If a defect is found in one of the inspection steps a) to e), then the check is provisionally terminated and the process is returned to process VI, ie the installation. Thus, in a condition of a defect in the monitoring system, a correction can be made before the verification steps a) to e) are carried out anew. In this embodiment, no distinction is made between various deficiencies. In an alternative, not shown embodiment, a distinction is made between different deficiencies, so that depending on the nature of the defect, the process can lead to another process. For example, various defects can lead to various stages of the installation process.

The embodiment shown in FIG. 3 shows only one of a large number of different possible methods. It goes without saying that, for example, the checking steps can take place in different numbers and in a different order. The illustrated in Figure 3

Flowchart therefore serves only to illustrate a concrete

Embodiment.

Claims

claims

1 . Method for checking a monitoring system in an elevator system (40), the monitoring system comprising at least one suspension element (1) and a monitoring device (3) for monitoring a state of the

Supporting means (1), wherein the support means (1) comprises electrically conductive tension members (5), which are surrounded by an electrically insulating jacket (6), the method comprising at least one of the steps: a) Checking whether the tension members (5) the monitoring device (3) are electrically connected; b) checking that the support means (1) are electrically connected to the monitoring device (3); c) checking whether an electrical resistance of a tension member (5) or a plurality of interconnected tension members (5) is within a range; d) Check whether a deviation of an electrical resistance of a

Tensile support (5) or more interconnected tension members (5) of an electrical resistance of a tension member (5) or more interconnected tension members (5) of the same support means (1) is below a first threshold value; and e) Checking whether a deviation of an electrical resistance of a

Zugträgers (5) or more interconnected train carrier (5) of an electrical resistance of a tension member (5) or more interconnected tension members (5) of another support means (1) is below a second threshold value; the method being performed before the elevator unit (40) is taken into an operation intended for the elevator unit (40) after installation, and wherein the elevator unit (40) is only used for the elevator unit (40) operation is released if no defects have been found during the check.

2. The method of claim 1, wherein the method at least two or

at least three or at least four or five of the verification steps a) to e).

3. The method according to any one of claims 1 or 2, wherein the verification step a) is a deficiency when less than a predetermined number of tensile carriers (5) are electrically connected to the monitoring device (3),

4. The method of claim 3, wherein in the verification step a) the

predetermined number of tension members (5) corresponds to all tension members (5) of the elevator installation (40).

5. The method according to any one of claims 1 or 2, wherein at the checking step b) is a deficiency when less than a predetermined number of support means (1) with the monitoring device (3) are electrically connected.

6. The method according to claim 5, wherein at the checking step b) the

predetermined number of suspension elements (1) all suspension means (1) of the elevator installation

(40).

7. The method according to any one of claims 1 or 2, wherein there is a deficiency in the Verfassungsungsschntt c) when the electrical resistance outside the

Area lies.

8. The method according to claim 7, wherein in the checking step c) the region has a lower limit which corresponds to an electrical resistance of a tension member (5) or a plurality of interconnected tension members (5) having a first length which is smaller than a length of the tension members ( 5), and wherein the region has an upper limit, which corresponds to a electrical resistance of a tension member (5) or a plurality of interconnected tension members (5) having a second length which is greater than a length of the tension members (5) corresponds.

9. The method of claim 8, wherein the first length more than 40%, preferably more than 60%, more preferably more than 80% of the length of Zügträger

(5), and wherein the second length less than 250%, preferably less than 167%, more preferably less than 125% of the length of the tensile carrier (5).

10. The method according to any one of claims I or 2, wherein at the verification step d) is a deficiency when the deviation above the first

Threshold is.

1 1. The method of claim 10, wherein in the verification step d) the first

Threshold less than 1 5%, preferably less than 10%, more preferably less than 5% of an average or predetermined electrical resistance of the tension member (5) or more interconnected Zugträger (5).

12. The method according to any one of claims 1 or 2, wherein the verification step e) is a deficiency, when the deviation over the second

Threshold is.

13. The method of claim 12, wherein in the verification step e) the second

Threshold less than 15%, preferably less than 10%, more preferably less than 5% of an average or predetermined electrical resistance of the tension member (5) or more interconnected Zugträger (5).

14. The method according to any one of the preceding claims, wherein at least one support means (1) in the elevator installation (40) is installed or maintained during installation. Method according to one of the preceding claims, wherein during installation the monitoring device (3) is installed or maintained.