Device for monitoring a conveyor
The invention relates to an apparatus for monitoring a conveying installation, comprising: a conveying belt ( 2 ) made of elastomeric material with a load-bearing side ( 3 ) for the conveying material and with a running side ( 4 ), the conveying belt having, in particular, an embedded reinforcing element ( 7 ); at least one detectable segment ( 8 ) which is embedded in the load-bearing side ( 3 ) and/or running side, in the vicinity of the surface; a detection system ( 6 ), in particular in the form of an optoelectronic system, which contactlessly senses and evaluates the detectable segment ( 8 ), in particular in conjunction with a process computer; and other installation parts, namely a drive drum, reversing drum, supporting rollers, supporting frameworks, and possibly other components; the detectable segment ( 8 ) being based on a thermochromic substance which results in a change in color if the temperature changes within the critical temperature range of a conveying belt, the detection system ( 6 ) sensing and evaluating the change in color.
1. A device for monitoring a conveyor, comprising:
a conveyor belt made of elastomer material, having a carrying side for the material to be conveyed, and a running side, whereby the conveyor belt has, an embedded strength support;
at least one detectable segment that is embedded into the carrying side and/or the running side, close to the surface; and
a detection system comprising an opto-electronic system, which detects and evaluates the detectable segment, without making contact, in connection with a process computer;
a reversing drum;
wherein the detectable segment comprises a matrix and a thermochromic substance worked into the matrix, the thermochromic substance bringing about a color change in the case of temperature changes within a critical temperature range of a conveyor belt, whereby the detection system detects and evaluates the color change.
2. The device according to claim 1 , wherein the detectable segment has an original color state and the thermochromic substance brings about reversible color changes with regard to temperature changes, in that the original color state recurs during the cooling process.
3. The device according to claim 1 , wherein the color change occurs within the temperature range of 80° C. to 150° C.
4. The device according to claim 3 , wherein the color change takes place without any transition, or in color gradations.
5. The device according to claim 1 , wherein the thermochromic substance is based on inorganic or synthetic pigments having a color change characteristic.
6. The device according to claim 1 , wherein the thermochromic substance is based on a polymer compound having a color change characteristic.
7. The device according to claim 6 , wherein the polymer compound has a polymer molecular structure and when the temperature changes, the polymer compound undergoes a change in the polymer molecular structure that triggers the color change.
8. The device according to claim 6 , wherein the polymer compound is a polyacetylene.
9. The device according to claim 1 , wherein the thermochromic substance is worked into the matrix with a uniform distribution.
10. The device according to claim 1 , wherein the matrix contains from 0.5 wt.-% to 5 wt.-% of the thermochromatic substance.
11. The device according to claim 10 , wherein the matrix contains from 1 wt.-% to 3 wt.-% of the thermochromatic substance.
12. The device according to claim 1 , wherein the matrix comprises an elastomer material, a thermoplastic elastomer (TPE), or a thermoplastic.
13. The device according to claim 12 , wherein the matrix comprises an elastomer mixture on the basis of polybutadiene.
14. The device according to claim 1 , wherein in a longitudinal direction of the conveyor belt, multiple detectable segments are present, disposed at intervals, within at least one of the carrying side and the running side.
15. The device according to claim 14 , wherein the detectable segments are equidistantly spaced.
16. The device according to claim 14 , wherein the detectable segments are spaced by a distance of from 10 m to 500 m.