Model DB Damaged Belt Detector

The Model DB Damaged Belt Detector is a cable operated damaged belt detector that looks for punctures, tears, or protrusions through the conveyor belt and provides a means of automatic shutdown to limit the amount of damage to the conveyor belt. The output contacts of the Model DB can control up to two separate circuits, one for machinery shutdown and one for an alarm. The Model DB Damage Belt Detector provides substantial cost savings in replacement belting and downtime associated with belt splicing or replacement.

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Description

Get an extra measure of protection for valuable conveyor belts with the Model DB Damaged Belt Detector. Economical and easy to install, they warn supervisory personnel of impending belt
failures due to rips, punctures, splice failures, or sharp objects protruding through the belt fabric. Damaged Belt Detectors mount in pairs positioned on either side of the belt. The units are connected by two spans of vinyl coated aircraft cable. One end of the cable mounts permanently to a support bracket and the other connects to a spring-loaded ball located in the unit. The cables loop underneath the belt from each side crossing at the midpoint. A belt problem is detected when an object or a piece of damaged belt hangs below the belt’s surface and sweeps away one or both cables.

As the cable is detached, it pulls a spring-loaded ball out of a socket, causing micro switches to sound an alarm and/or to shut down the conveyor. One end of each cable is permanently
affixed to the bracket preventing the loss of the cable. It’s simple, effective, and it gives that extra warning of possible belt failure. But, even though the idea is simple, these detectors
are not lightweights. They’re rugged, heavy duty units that are designed to work in any industrial environment including hazardous locations.

Specifications

Housing is cast aluminum with optional epoxy or polyester coatings available (for additional corrosion resistance)
Unit should be used in pairs for best protection of the conveyor belt
Unit is mounted on the conveyor by drilling (4) 13/32″ diameter holes
General purpose (weatherproof) units and explosion proof units have (2) 1″ NPT conduit opening; standard units have (2) dry, unpowered SP/DT micro switches rated for 20A @ 120 VAC, 240 VAC, and 480 VAC.
DP/DT micro switch versions are rated for 15A @ 120 VAC, 240VAC; 3/4 HP at 125 VAC, 1-1/2 HP at 250 VAC
Each unit is supplied with 10 feet of cable; can be field extended for larger conveyor belt widths
Standard operating pull force is 4 lbs with optional 8 lb. or 16 lb. units available upon request
General purpose units are rated NEMA Type 4/4X weatherproof and corrosion-resistant
Explosion proof units are rated NEMA Type 7/9 for dust ignition proof and vapor explosion proof
Dual-rated “D” units are rated NEMA Type 4 weatherproof and NEMA Type 9 dust ignition proof.
General-purpose controls are IP65 compliant
Most models are UL and c-UL (Canada) listed

Model DB Damaged Belt Detector