DE102009003458A1 - Device for monitoring cable tension during producing steel cable conveyor belt, has pitch measuring device with sound receiver, which detects change of oscillation frequency and change of oscillation voltage by adjusting pitch - Google Patents

Abstract

The device (1) has an elastomeric material cover plate, and clamping device (3) clamping cables (2) e.g. steel cables. A measuring device (4) i.e. pitch measuring device, controls the cable tension of each cable. A cable tensioning device (5) is provided in a specific position after evaluating the measurement result of the measurement device when each cable individually receives re-tightening. The pitch measuring device is provided with a sound receiver, which detects change of oscillation frequency and change of oscillation voltage by adjusting the pitch.

Description

• – eine Klemmeinrichtung, die alle Seile verklemmt;
• – eine Messeinrichtung, die die Seilspannung jedes Seiles kontrolliert sowie
• – eine Seilspanneinrichtung, die nach Auswertung der Messergebnisse der Messeinrichtung in der Lage ist, bei jedem Seil nach Bedarf individuell eine Nachspannung vorzunehmen.

The invention relates to a device for monitoring the rope tension during the production of a conveyor belt with a support side and running side cover plate made of an elastomeric material and embedded ropes as a tensile carrier, in particular in the form of steel cables, wherein in the production direction of the conveyor belt parallel ropes detect a cover plate-free cable area, in which at least the following equipment parts act:

• - A clamping device which clamps all ropes;
• - A measuring device that controls the rope tension of each rope as well
• - A rope tensioning device, which is after evaluation of the measurement results of the measuring device in a position to make each cable individually as required a restraint.

• DE 25 20 943 A1
• DE 25 32 190 A1
• DE 38 01 120 A1
• DE 43 33 839 A1
• DE 44 36 042 A1
• EP 0 336 385 A1
• EP 0 753 471 A1
• WO 2008/034483 A1

In the context of conveyor belt technology, steel cable conveyor belts play an outstanding role, as they allow the realization of large conveyor lines of several kilometers. In most cases, such conveyor belts are still equipped with embedded synthetic cord Querarmierungen, wherein the arrangement within the support-side cover plate is preferred. This cross reinforcement is primarily the slot protection. With regard to the steel cable conveyor belts, reference is made in particular to the following patent literature:

• DE 25 20 943 A1
• DE 25 32 190 A1
• DE 38 01 120 A1
• DE 43 33 839 A1
• DE 44 36 042 A1
• EP 0 336 385 A1
• EP 0 753 471 A1
• WO 2008/034483 A1

Of the elastomeric material of the support side and running side cover plate is a vulcanized rubber compound, for example on the Base of a chloroprene rubber. The production of a conveyor belt includes the cover plate assembly on the calender and the vulcanization the rubber mixture. It is important that in the production a steel cable conveyor belt all ropes under the same Suspense. An average steel cable conveyor belt contains about 100 ropes next to each other. Problem point is in particular, the vulcanization process, where among the usual Vulcanisation conditions at temperatures of 130 to 200 ° C Voltage changes of individual ropes can occur. Unequal rope tension can be in practical use negatively impacted by increased surface pressure individual ropes on the drive and reversing drums, by misalignment of the conveyor belt, by working out individual ropes through the cover plates and overloading of ropes, which are under higher voltage.

to Achieving an even distribution of Seilspannung work modern production facilities with a rope tensioning device, for example, in the form of a hydraulic device supported from a measuring device. However, this can not be ruled out be that forces on individual ropes by secondary Influences work differently than on adjacent ropes.

in the As part of a further development, the object of the invention therein, a generic device for monitoring the rope tension during manufacture, especially during vulcanization, to provide a conveyor belt, with the all influences of a voltage change the ropes are detectable.

Solved This object is achieved according to the characterizing part of the claim 1 in that the measuring device has a pitch measuring station is equipped with at least one Tonaufnehmer, the for each vibrated rope changes the oscillation frequency and thus with adjustment of the pitch a change the rope tension detected.

expedient Furnishing features are mentioned in claims 2 to 9.

The Invention will now be based on an embodiment below Reference to schematic representations explained. It demonstrate:

1 the interaction of a clamping device, measuring device and a cable tensioning device within the cover plate-free cable area;

2 a measuring device in the form of a pitch measuring station with integrated Tonaufnehmern;

3 Details of a rope tensioning device.

• – eine Klemmeinrichtung 3, die alle Seile 2 verklemmt;
• – eine Messeinrichtung 4, die die Seilspannung jedes Seiles 2 kontrolliert sowie
• – eine Seilspanneinrichtung 5, die nach Auswertung der Messergebnisse der Messeinrichtung 4 in der Lage ist, bei jedem Seil 2 nach Bedarf individuell eine Nachspannung vorzunehmen.

1 shows a device 1 for monitoring the cable tension during the production of a steel cable conveyor belt, wherein in the production direction X of the conveyor belt, the parallel ropes 2 detect a cover plate-free cable area Y, in which the following equipment parts act:

• - A clamping device 3 , all ropes 2 jammed;
• - a measuring device 4 that the rope tension of each rope 2 controlled as well
• - a rope tensioning device 5 , after evaluation of the measurement results of the measuring device 4 is capable of every rope 2 as required indi to make a permanent tension.

The measuring device 4 preferably between the clamping device 3 and the rope tensioning device 5 is a pitch measuring station, which in conjunction with the 2 will be presented in more detail.

• – Jedem Seil ist ein Tonaufnehmer 7 zugeordnet (Variante A).
• – Einer Gruppe von Seilen, beispielsweise einer Gruppe von fünf benachbarten Seilen, ist ein einziger Tonaufnehmer 7 zugeordnet (Variante B).

2 shows a pitch measuring station 6 that with multiple sound pickups 7 Is provided. These Tonaufnehmer capture for each vibrated rope a change in the oscillation frequency and thus adjusting the pitch a change in the rope tension. In this aspect, the pickup can also be called a vibration pickup. With regard to the number of Tonaufnehmer particular two variants are of importance:

• - Each rope is a clay pickup 7 assigned (variant A).
• - One group of ropes, for example a group of five adjacent ropes, is a single sound pickup 7 assigned (variant B).

Especially expedient variant A, since hereby the individual detection of the voltage deviation of a rope optimally is to be realized.

at This test is not so much about the absolute Pitch, which is an indication of the right bias for the respective Fördergurttyp, but rather, that all ropes are with a defined tolerance in the same frequency range. All ropes are in frame the measuring process oscillated, the magnetomechanical Vibration offset is particularly noteworthy.

Preferably, the pitch measuring station stands 6 with the sound pickups 7 connected to a central computer, which compares the measurement results of all ropes. With the help of numerically coded ropes then the rope assignment can be made, possibly with corrective measures in terms of rope tension. If, for example, the steel cable conveyor belt has 100 cables, whereby, for example, for the cables 25, 42 and 73, deviations in the cable tensions can be detected, then the corresponding corrective measures would have to be carried out for this cable group.

advantageously, The device works in such a way that at frequencies that are outside of the approved field, in addition an acoustic and / or optical alarm signal is triggered. Using an alarm signal of the aforementioned type can be number-coded Ropes are dispensed with. However, it is then a manual test each rope required, for example by means of pressure sensors.

Especially It is expedient if the device is fully automatic works by the central computer, the measurement results of the pitch station passed on to a production control, which then for the / affected rope / s by means of the rope tensioning device the post tension performs. With respect to the above-mentioned example, it would be relevant this the ropes 25, 42 and 73. In a fully automatic processing can then be dispensed with an alarm signal.

To 3 includes the rope tensioning device 8th a rope guide 9 for the rope 10 , With the help of the corresponding rope tensioning components 11 and 12 putting a squeezing pressure on the rope 10 Exercise and work on hydraulic basis, for example, each rope can be tightened if necessary.

Also if the device according to the invention takes priority used for steel cable conveyor belts, this way, other rope constellations can also be detected For example, conveyor belts with ropes made of aramid.

1

Facility as a total monitoring device

2

Rope, especially steel rope

3

clamper

4

measuring device

5

Tension

6

pitch station

7

sound recorder

8th

Tension

9

cable guide

10

rope

11

Cable tensioning device

12

Cable tensioning device

X

production direction of the conveyor belt

Y

cover plate free cable range

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 2520943 A1 [0002]
• - DE 2532190 A1 [0002]
• - DE 3801120 A1 [0002]
• - DE 4333839 A1 [0002]
• - DE 4436042 A1 [0002]
• EP 0336385 A1 [0002]
• EP 0753471 A1 [0002]
• - WO 2008/034483 A1 [0002]

Claims (9)

Facility ( 1 ) for monitoring the cable tension during the production of a conveyor belt with a support side and running side cover plate made of an elastomeric material and with embedded ropes ( 2 . 10 ) as a tension member, in particular in the form of steel cables, wherein in the production direction (X) of the conveyor belt, the parallel ropes ( 2 . 10 ) detect a cover plate-free cable area (Y), in which act at least the following equipment parts: - a clamping device ( 3 ), all ropes ( 2 . 10 ) jammed; A measuring device ( 4 ), which determines the rope tension of each rope ( 2 . 10 ) and - a rope tensioning device ( 5 . 8th ), which after evaluation of the measurement results of the measuring device ( 4 ) is able to with each rope ( 2 . 10 ) to make an additional tension as needed; characterized in that the measuring device ( 4 ) a pitch measuring station ( 6 ), which is equipped with at least one clay sensor ( 7 ), which is used for each vibrating rope ( 2 . 10 ) detects a change in the oscillation frequency and thus adjusting the pitch a change in the cable tension. Device according to claim 1, characterized in that each cable ( 2 . 10 ) a clay pickup ( 7 ) assigned. Device according to claim 1, characterized in that a group of cables ( 2 . 10 ) a single clay pickup ( 7 ) assigned. Device according to one of Claims 1 to 3, characterized in that the pitch measuring station ( 6 ) between the clamping device ( 3 ) and the rope tensioning device ( 5 . 8th ) is arranged. Device according to one of Claims 1 to 4, characterized in that the pitch measuring station ( 6 ) ensures that all ropes ( 2 . 10 ) are in the same frequency range with a defined tolerance. Device according to one of claims 1 to 5, characterized in that the ropes ( 2 . 10 ) are magnetomechanically vibrated. Device according to one of Claims 1 to 6, characterized in that the pitch measuring station ( 6 ) is connected to a central computer which records the results of all ropes ( 2 . 10 ). Device according to one of claims 1 to 7, characterized in that the device ( 1 ) acts so that at frequencies that are outside the approved field, an audible and / or visual alarm signal is triggered. Device according to one of claims 1 to 8, characterized in that the device ( 1 ) works fully automatically by the central computer, the results of the pitch measuring station ( 6 ) to a production control, which then for the affected rope (s) ( 2 . 10 ) by means of the rope tensioning device ( 5 . 8th ) makes the tension.