EP1832540A1 - Measuring device for power transmission measurement - Google Patents

Abstract

The measuring device (1) has a mounting device (4) for positioning multiple catenary wires (3). A fixing device for one of the catenary wire (2). A power transmission device (9) by which a proportionate load of a whole load is transferred to tested catenary wire (2) from one or more adjacent catenary wires (3). An independent claim is also included for the method for measurement of power transmission of catenary wire of traction sheave elevator system.

Description

The present invention relates to a measuring device for a traction sheave elevator installation as well as a method for checking a traction of at least one traction cable of a traction sheave elevator installation.

Various systems are known from the prior art, by means of which a driving capability check is to be carried out. From the WO 2004/103880 A test lever emerges, in which a measuring system for the capability testing is integrated. From the EP 0 390 972 B1 a system is known, measured in the motion parameters of a traction sheave elevator and it is concluded that a drive capability of the system. From the EP 0 573 432 B1 For example, a system is known which is connected to a movable area of the elevator installation, receives accelerations during the operation of the elevator installation and is intended to permit a determination of a driving capability. From the EP 0 391 174 B2 For example, a system is known in which a driving capability is to be determined via a distance measuring sensor and an effectiveness of an elevator brake is to be determined via a force measuring signal generator.

Object of the present invention is to be able to realize a Treibfähigkeitsprüfung a traction sheave elevator regardless of the available space without much effort.

This object is achieved with a measuring device having the features of claim 1 and with a method having the features of claim 9. Advantageous developments are specified in the respective subclaims.

• eine Befestigungseinrichtung zur Positionierung an zumindest mehreren Tragseilen,
• eine Fixiervorrichtung für zumindest eines der Tragseile,
• eine Kraftübertragungsvorrichtung, mittels der zumindest eine anteilige Last einer Gesamtlast an zumindest einem zu prüfenden Tragseil auf ein oder mehrere benachbarte Tragseile übertragbar ist, und
• eine Messeinrichtung zur Bestimmung einer Treibfähigkeit anhand der anteiligen Last auf.

A measuring device is proposed, which can be used for a driving capability measurement on an elevator installation with a plurality of suspension cables, in which the suspension cables connect a counterweight to an elevator cage, a cabin or a platform, wherein the elevator cables extend over a traction sheave and a non-positive connection by frictional engagement enter with the traction sheave. The measuring device has

• a fastening device for positioning on at least a plurality of supporting cables,
• a fixing device for at least one of the support cables,
• a power transmission device, by means of which at least a proportionate load of a total load on at least one test cable to be tested on one or more adjacent support cables is transferable, and
• a measuring device for determining a driving ability on the basis of the proportionate load.

A development of the fixing device has a mechanical clamping of at least one supporting cable. In addition, the test cable to be tested can preferably be fixed relative to the measuring device. It is also possible for one or more supporting cables adjacent to the supporting rope to be tested to be firmly fixed by means of the fixing device to the measuring device, in particular to the force transmission device. For example, the power transmission device has at least one mechanical clamping connection. By means of this at least one, in particular at least two or more carrying cables can be fixed. An embodiment provides that the fixing device is part of the power transmission device.

A further embodiment, which may preferably also be provided as a stand-alone solution, has a measuring device that can be attached to supporting cables of the traction sheave elevator installation, with the following features: the power transmission device comprises a force generator, which between the test cable to be tested and a supporting cables adjacent thereto Generates force that causes a relief of the test rope to be tested and a load on the adjacent suspension cables. For power transmission, the suspension cables are mechanically non-positively and frictionally coupled with each other.

• Messung des Federweges eines mechanischen Druck- oder Zugfederelementes,
• Messung mittels Drehwinkelmessverfahren,
• Messung mittels Kraftmessdose,
• Messung mittels eines elektrischen Drucksensors,
• Messung mittels eines Dehnmessstreifens und/oder
• Messung mittels Piezokristall.

In particular, at least one of the measuring devices comprises a measuring device, which comprises a load cell, which preferably measures loading or unloading of the test rope to be tested. The measuring principles of the measuring device used are, for example

• Measurement of the spring travel of a mechanical pressure or tension spring element,
• Measurement by means of rotational angle measuring methods,
• Measurement by means of a load cell,
• Measurement by means of an electrical pressure sensor,
• Measurement by means of a strain gauge and / or
• Measurement by means of piezocrystal.

It is possible to combine several of these measuring principles, either in separate measuring devices or in a single measuring device. In addition to the measurement of loading or unloading of the test rope to be tested is by another arrangement of the sensor and the ability to measure another force from which the traction of the support cable can be concluded.

A further development provides that a test device is connected to the measuring device in a repeatably detachable manner, the test device initiating an introduction of force for checking the carrying capacity in the measuring device. The tester may be a portable computer running a measurement program. However, the test apparatus may also be a test facility located far away, which can be connected to the measuring device. Such a connection is also possible in a wireless manner, for example as a bidirectional connection.

It is preferred if the measuring device is coupled to a test device which records one or more data characterizing at least one result of a traction test. In particular, the test apparatus can also provide an evaluation of the recorded data, preferably also with a logging.

According to a further aspect of the invention, a method is provided for measuring a traction of a traction cable of a traction sheave elevator, whereby a proportional cable force of a total load prevailing on the traction cables is transmitted by at least one of the traction cables to be examined to one or more adjacent carrier cables. This allows to observe the behavior of the test rope to be tested. From the reaction at the discharge can be concluded that the driving ability of at least the test cable to be tested. A further embodiment provides that a transfer of a proportionate load takes place until a drive limit is reached. This is detected, for example, by the fact that there is no frictional connection and thus no frictional connection between the test cable to be tested and the support disk. This can be monitored, for example, via a detector unit which can be attached to the elevator installation. If this detects a relative movement, that is, if the suspension cable slips even minimally, a limit is exceeded and an evaluation with regard to the assessment of this limit value is made possible.

Preferably, a force is mechanically impressed between the test cable to be tested and at least one adjacent carrying cable, wherein the test cable to be tested is relieved. For this purpose, a force can be generated via a rotating spindle, via a hydraulic pressure transducer or via a spring tension. Also, a lever can be used.

In addition to a single power source, it is possible to use two or more power sources simultaneously in the measuring device. For this example, two power sources can be arranged opposite to each other and cause a symmetrical force into the measuring device.

A development of the method provides that an automated introduction of force takes place after triggering of a measurement process. This makes it easier to understand how a force was impressed. In particular, this makes a measurement accurately repeatable, so that the data obtained from the system actually become comparable. The sequence of the test procedure can preferably be preset, for example, via a setting of a time of the test, a force increase over a period of time, via an initiation of a steadily increasing test force or else via an introduction of different test force groups of different characteristics.

With the proposed measuring devices as well as with the measuring method, a safe, repeatable and therefore traceable measurement on suspension ropes of elevator systems with traction sheave drive is made possible.

It is particularly preferred to carry out a measurement such that the elevator installation is neither dismantled nor otherwise changed for this process. For example, the measuring device can be attached to an existing elevator installation without having to remove or modify these or parts thereof. In particular, the measuring device is dimensioned such that the operating principle can be used universally. For example, supporting cable shots of the measuring device can be variably arranged so as to take account of different distances between carrying cables of different elevator systems. Preferably, elements of the measuring device are variable, in particular differently positionable in the measuring device in order to be adapted to different elevator systems. It can be provided that individual Modules of the measuring device are exchanged, so that the measuring device is attachable.

The purpose of the measurement by means of the measuring device is to provide proof of sufficient driving capability of the traction sheave connection as part of a traction measurement of a traction sheave elevator system. By implementing the mechanical measuring principle to determine the rope forces in the suspension cables, in which a loss of frictional connection of the system suspension rope - traction sheave, allows a universal application of the system.

• Seilkraftverhältnis als Variable, an der konkreten Anlage wählbar
• Treibscheibendurchmesser
• Seilrillengeometrie
• Umschlingungswinkel
• Seilmachart.

In an automatic evaluation of the measurement, the technical principle of the traction sheave drive can be used by using the equation Eytelwein. This indicates that the traction of a traction sheave system depends on the following parameters:

• Rope force ratio as a variable, selectable at the concrete plant
• Drive wheel diameter
• Rope groove geometry
• Wrap angle
• Resistant rope.

An existing frictional connection realizes a defined power transmission via the suspension cable - traction sheave - connection. In addition, the capability testing can be carried out not only for a suspension cable but also for several suspension cables or for a complete system. For this purpose, for example, a single support cable tested and concluded on the overall system.

• Messung der Seilkraft von einem Tragseil (Wahl der Seile beliebig) und rechnerischer Rückschluss auf die Gesamtverbindung
• Messung der Seilkraft von mehreren Tragseilen (Wahl der Seile beliebig) und Rückschluss auf die Gesamtverbindung

Example of a possible check are as follows:

• Measurement of the cable force of a suspension rope (choice of ropes arbitrary) and computational inference on the overall connection
• Measurement of the cable force of several suspension ropes (choice of ropes arbitrary) and inference to the overall connection

Since the cable force determination is made on one or more of the support cables by the proportionate cable force is transmitted in the examined rope in the total load on the other participating in the recording of the total load ropes, it can be concluded that the overall behavior. From the measured cable force, which, for example, the drive limit for the rope force ratio of this support rope when examined indicates only this support cable, or which indicates the driving limit of several ropes with simultaneous load transfer of rope loads of several suspension cables to the respective associated mittragenden suspension cables, can be immediately close to the traction of the overall connection. In particular, in the case of a plurality of supporting cables which are tested, a power transmission of the supporting cables takes place by means of mechanical clamping connections. A measurement of the rope forces is preferably carried out on mechanical transmission elements.

Fig. 1

eine erste schematische Ausgestaltung einer Messvorrichtung in einer Aufsicht, wobei ein Tragseil überprüft wird, während benachbarte Tragseile von der Messvorrichtung mitumfasst sind, um eine Traglast des zu prüfenden Tragseiles zu übernehmen,

Fig. 2

eine Schnittansicht durch die Messvorrichtung aus Fig. 1,

Fig. 3

eine schematische Ansicht einer Anordnung einer Messvorrichtung bei vier Tragseilen und einem davon zu prüfenden Tragseil,

Fig. 4

eine schematische Ansicht einer weiteren Anordnung einer Messvorrichtung,

Fig. 5

eine Prinzipskizze einer Aufbringung von Kräften über eine Messvorrichtung,

Fig. 6

eine weitere schematische Ansicht einer anderen Ausgestaltung einer Messvorrichtung, und

Fig. 7

eine schematische Ansicht einer weiteren Messvorrichtung.

The following drawings show further features of the present invention. However, these features are not intended to be limiting or construed to the individual embodiments. Rather, one or more of the features with other features of other embodiments, also from the above description, can be linked to further developments. Show it:

Fig. 1

a first schematic embodiment of a measuring device in a plan view, wherein a support cable is checked, while adjacent support cables are encompassed by the measuring device in order to take on a load of the test rope to be tested,

Fig. 2

a sectional view through the measuring device of FIG. 1,

Fig. 3

a schematic view of an arrangement of a measuring device in four suspension cables and one of them to be tested suspension rope,

Fig. 4

a schematic view of another arrangement of a measuring device,

Fig. 5

a schematic diagram of an application of forces via a measuring device,

Fig. 6

a further schematic view of another embodiment of a measuring device, and

Fig. 7

a schematic view of another measuring device.

1 shows a first schematic embodiment of a measuring device 1 in a plan view, wherein a first carrying cable 2 is checked, while adjacent carrying cables 3 are enclosed by the measuring device 1 in order to determine a carrying load of the carrying cable 2 to be tested to take over. The measuring device has a fastening device 4, which can preferably be opened and closed by pivoting via a hinge 5. The fastening device 4 preferably has at least a first part 6 and a second part 7, which are separable from each other and can be joined together. Instead of the joint 5 more joints or other possibilities may be provided. Also, the first 6 and the second 7 part of the fastening device 4 can be completely separated from each other. For example, a hinge pin can be removed and replaced, for example for storage of the measuring device in a system case. The fastening device 4 is such that a clamping force can be impressed on the supporting cables. For example, this can be effected by a corresponding closure of the first and the second part. In the illustrated embodiment of the measuring device, a clamping spindle 8 is provided as a closure. If this is rotated, the two parts 6, 7 can approach each other ever further. Due to the construction as a clamping spindle 8 can be applied either by motor or by hand, preferably using a lever, a required force or torque for closing and clamping. Connected to the fastening device 4 is a power transmission device 9. This has a load spindle axis 10 and a load spindle 11. The load spindle 11 is arranged displaceably along the load spindle axis 10. As shown, the load spindle 11 is aligned with the test cable 2 to be tested. This makes it possible for the force which can be applied via the load spindle 11 to act on the carrying cable 2 to be tested.

FIG. 2 shows a sectional view through the measuring device from FIG. 1, whereby the measuring device 1 and its structure in the area around the carrying cable 2 to be tested is shown in greater detail. Shown are the first part 6 and the second part 7 of the fastening device 4. These two parts 6, 7 each have a clamping jaw 12. These serve as a fixing device 13 for the test cable 2 to be tested. Preferably, the other supporting cables are held in a stationary manner in the measuring device 1 via the fixing device 13. If all supporting cables are fixed in this way, a pair of clamping jaws is preferably provided for each carrying cable. Furthermore, a support rail 14 is provided. By means of this, movement of a clamping jaw 12 in a specific region of the fixing device 13 relative to a part of the fastening device 4 can be provided. Preferably, the support traverse limits movement of the jaw 12. As shown in FIG. 2, the pair of jaws 12 associated with the support rope 2 to be tested is in a rest position. It is held by a jaw lock 15 in the rest position. If the jaw lock would be opened, at least one of the two, preferably both jaws 12 would be movable and according to gravity move down. The support cross 14 then serves as a support for at least one of the two jaws 12. As shown, however, a support cross 14 provided on both sides. A displaced from the rest position in a test position jaw 14 is indicated by dashed lines. This jaw 12 is associated with a support rail 14, which is pivotally connected to a pressure lever 16. The pressure lever 15 is in turn coupled to a pull lever 11. Preferably, these together form a rigid component. About the load spindle 11, a pressure on the pressure lever 15 can now be exercised. The load spindle axis 10 serves as a pivot point about which the pressure lever 15 and the load lever 16 rotate. The load spindle 11 is connected to a measuring device 17, by means of which the force to be applied, a path or another characteristic parameter describing the ability to drive can be detected.

The measuring device 1 is now used as follows: An inspection and work routine begins with a selection of any supporting rope, which is determined as a measuring cable. The load spindle 11 with measuring device 17 is moved for this purpose on the load spindle axis 10 to the measuring cable. The jaw lock 15 of the jaw 12 associated with the measuring cable is unlocked. Thus, the associated jaw 12 moves down until it comes to rest on the support rail 14. Thereafter, the attachment of the fastening device 4 takes place on the support cables. For this purpose, the opened mounting device 4 is pushed laterally over the support cables and closed by means of the clamping spindle 8. The respective, not individually illustrated jaws put on the suspension cables. By tightening the load spindle 11 with measuring device, the load transfer takes place successively from the measuring cable into the other carrying cables, preferably until the carrier cable drive pulley connection fails as a static friction connection. The force then measured on the load spindle 11 is a measure of the driving ability of the overall connection. In order to enable relief of the test cable to be tested by a force transmission by means of the jaws 12 via a relative movement to the support brackets 14, one or more jaw bearings 18 are provided. Preferably, these are designed as sliding or roller bearings.

3 shows a schematic view of an arrangement of a measuring device in the case of four supporting cables 3 and one of the supporting cables 2 to be tested thereof. This is a variation of, for example, the measuring device 1, as shown in FIG. The measuring device is able to cover all supporting cables of the traction sheave elevator. By selectively clamping as described above, each individual suspension rope can be checked one after the other. There is also the possibility of examining one or two suspension ropes on the traction of the entirety of the not yet individually tested suspension cables or, depending on the number and position of the tested suspension cables to close on a single suspension cable. During the measurement, it is possible to apply the load redistribution to be applied slowly as well as quickly, in particular also suddenly. In particular, it is also possible to test two ropes at the same time instead of one. The advantage here is a simultaneous examination of several supporting pages and thus a shortening of the examination time.

4 shows a schematic view of a further embodiment and arrangement of a measuring device 1. The measuring device 1 has a fastening device 4 for three of the five supporting cables to be tested. Basically, any number of three selected suspension cables can be taken into account, regardless of a total number of suspension cables. This allows a very lightweight design and facilitates handling of the measuring device 1 when mounting. If, for example, there are five carrying ropes and the measuring device comprises three carrying ropes, then three carrying ropes are tested in each case. The measuring device is arranged so that there is an unchecked suspension rope between two tested suspension cables. By knowing the tested ropes can then be closed with knowledge of the overall behavior of the suspension ropes on the individual previously untreated suspension cable.

Fig. 5 is a schematic diagram of an access to a measuring device 1. The arrows illustrate that the measuring device is not only in front before the support cables attachable. This illustrates a first arrow. Due to the very narrow system, there is the possibility of attaching the measuring device 1 even with only lateral access to the support cables. This indicates a second arrow. The measuring device 1 can therefore be used independently of the other constructional conditions in an elevator shaft or in the region of a drive plane, if access to the suspension cables is available.

Fig. 6 is another schematic view of another embodiment of a measuring device 1. Here, various possibilities are shown how a clamping force generated for at least one supporting cable, in particular also can be impressed. Schematically represented via respective arrows A a force and direction of movement of the jaws 12 is shown. Arrows B illustrate a directional vector of an example load registration mechanism. According to one embodiment, a clamping force can be generated mechanically, for example by using a spindle 19. Instead of the spindle 19 may also be a rack, in particular also another toothing present.

For example, a transmission may be provided, the translation enables a fine transmission of the movement. On the other hand, a clamping force can be carried out by an independent application of the jaws to one or more support cables due to a relative movement of the jaws to the support cable. By a geometry that allows, for example, tilting, a power transmission can take place. A further embodiment provides for a hydraulic and / or pneumatic actuation, indicated by an expansion cylinder 20. Furthermore, one or more levers for force generation can be used, for example a lever, as described above in the prior art and on in the Reference is made to the scope of the disclosure.

FIG. 7 shows a further embodiment of a measuring device 1 in a schematic view. Here, two arbitrary support cables are selected and used for a measurement of a previously determined support cable. This is indicated by the arrows. Again, there is the possibility of a parallel access, as shown in FIG. 5 has already been shown. By way of example, a test device 21 is also specified which, on the one hand, can initiate a measuring process, but on the other hand is able to record and further process measured data. The test device 21 can be wired to the measuring device 1 or else coupled to the measuring device 1 via other transmission possibilities for exchanging data.

Claims (12)

Measuring device (1) for a driving capability measurement on an elevator installation with a plurality of suspension cables (3) connecting a counterweight to an elevator cage, a cabin or a platform, the elevator cables extending over a traction sheave and frictionally engaging the traction sheave; characterized in that the measuring device (1) a fastening device (4) for positioning on at least a plurality of supporting cables (3), - has a fixing device (13) for at least one of the support cables (2), - Having a power transmission device (9), by means of which at least a proportionate load of a total load on at least one test cable to be tested (2) on one or more adjacent support cables (3) is transferable, and - A measuring device (17) for determining a driving ability based on the proportionate load. Measuring device (1) according to claim 1, characterized in that the fixing device (13) allows a mechanical clamping of at least one supporting cable (2). Measuring device (1) according to claim 1 or 2, characterized in that the force transmission device (9) comprises at least one mechanical clamping connection. Measuring device (1) according to claim 3, characterized in that the fixing device (13) is part of the power transmission device (9). Measuring device (1), in particular according to one of the preceding claims, characterized in that the force transmission device (9) comprises a force generator which generates a force between the test cable (2) and supporting cables (3) adjacent thereto which relieves the load to be tested Supporting cable (2) and a load of the adjacent supporting cables (3) causes. Measuring device (1) according to one of the preceding claims, characterized in that the measuring device (17) comprises a force transducer, which measures a loading or unloading of the test cable to be tested (2). Measuring device (1) according to one of the preceding claims, characterized in that a test device is repeatedly detachably connected to the measuring device, wherein the test device causes an initiation of an introduction of force for checking the carrying capacity in the measuring device (1). Measuring device (1) according to one of the preceding claims, characterized in that a test device is coupled to the measuring device, which receives one or more data characterizing at least one result of a capability test. A method for measuring a driving ability of a support rope of a traction sheave elevator, wherein a proportional cable force of a ruling on the support cables total load of at least one of the test cables to be tested (2) on one or more adjacent support cables (3) is transmitted. A method according to claim 9, characterized in that a transfer of a proportionate load takes place until reaching a driving capacity limit. A method according to claim 9 or 10, characterized in that a force is mechanically impressed between the test cable (2) and at least one adjacent support cable (3), wherein the test cable to be tested (2) is relieved. A method according to claim 9, 10 or 11, characterized in that after triggering a measurement process, an automated force is applied.

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