Telco has designed a unit that can effectively monitor conveyors and prevent damage. Many belt monitoring units can detect a belt failure but are very maintenance intensive; this system has designed to give the user peace of mind.
How it works
The unit makes use of Telco infrared sensors which monitor the belt position at all times. These infrared sensors are very robust and can handle coal-mining environments without problem. Sunlight, water, dust and dirt do not affect them.
The unit can be installed in various configurations depending on customer needs. The most basic option will detect belt tear in the centre of the belt only. The next level will detect belt tear and alignment. These can be fitted with an alarm indication, or voltage free contacts which can be incorporated into the PLC and scada system.
The unit has been installed and tested in very harsh environments and has passed all tests subjected to it. In one example, the sensor head was damaged by coal build-up and still continued to work without problems.
The frame
The frame is designed with pipe bent in a U to fit around the conveyor with no sharp edges that can damage it. The pipes are powder coated and can be supplied in various colours.
The electronics
The system uses two infrared transmitters and two infrared receivers, one on each side of the conveyor. These can be doubled up for greater protection if required. The amplifier is not situated on the transmitters or receivers but as a stand-alone unit separate from the sensors, and can incorporate a 10 second delay to eliminate unwanted trips. The system is designed to be failsafe, meaning that a power or system failure will stop the conveyor. The amplifier and relays are fitted inside an IP65 box, and the system can be supplied from 24 VDC or 24/110/ 220 VAC. The voltage free contacts are rated to 10 A.
Integration and maintenance
The voltage free contacts can be used by system integrators or mine personal to connect to a PLC, which can then also be connected via communication to a scada system. The system can be tested at regular intervals by manually disconnecting the transmitters and holding them in line with the receivers.
Next-generation condition monitoring
Sensors & Transducers
The next generation Sitrans MS200 multisensor from Siemens is setting new standards in condition monitoring.
Read more...Telco sensors for blocked/empty chute detection
Sensors & Transducers
Telco sensors overcome the problems of contaminated environments through powerful high-performance infrared sensors that ensure penetration of harsh pollution and guarantee reliable detectio
Read more...Cleaning solutions for optical sensors Endress+Hauser South Africa
Sensors & Transducers
Achieving accurate and continuous process visibility requires reliable sensor performance, even in challenging media. Endress+Hauser’s CYR51 mechanical cleaning unit addresses these challenges by providing stable, automated cleaning of turbidity and UV-Vis absorption sensors.
Read more...Next-generation gas meter module
Sensors & Transducers
Sensirion has launched its new gas meter module combining a low-power consumption mode, future-ready compatibility and seamless integration, all within the same compact form factor.
Read more...Food safety – a matter of weight
Sensors & Transducers
Weighing systems play a key role in ensuring product quality in food production, complying with legal requirements and avoiding product recalls. The Minebea Intec MiNexx portfolio has been specially developed to meet these requirements.
Read more...Telco sensors in the paper and pulp industry Gail Norton Instrumentation
Sensors & Transducers
The paper and pulp industry poses a major problem for most photoelectric sensors. Telco Sensors has overcome this with its powerful and high-performance photoelectric sensors, ensuring penetration of thick and harsh pollution while guaranteeing reliable detection.
Read more...Leaders in sensor technology Gail Norton Instrumentation
Sensors & Transducers
A new addition to the Telco Sensors range is the adjustable Proximity sensor, with a range up to 5 metres.
Read more...Cutting-edge sensor technology Endress+Hauser South Africa
Sensors & Transducers
The advantage of Endress+Hauser’s Memosens technology is that digitised measured values and sensor information are transmitted via a non-contact connection from the sensor to the cable, and as a digital signal to the transmitter.
Read more...Miniature inductive sensors ifm - South Africa
Sensors & Transducers
The inductive IY/IZ type sensors from ifm are used in various industrial areas where space is limited.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version