Conveyor belts are used in automated distribution and warehousing, as well as in manufacturing and production facilities to carry goods to different locations. There are two main classes of belt conveyors; those in general material handling such as those used for moving boxes or components through a manufacturing plant, or those used to transport large volumes of resources and agricultural materials such as grain, salt, coal, sand and more.
Conveyors are typically made up of two or more pulleys with an endless loop of carrying medium, in this case, the belt, that rotates around them. One or more of the pulleys are powered which moves the belt forward. However, they can be very complex pieces of machinery that include multiple components such as tensioning systems, gear boxes, drive motors and more.
Risks and Challenges
Like most pieces of mechanical or electrical equipment there are a number of fire risks associated with conveyors, these include:
- Electrical or mechanical faults
- Electrical or mechanical faults can result in overheating or fire. If the machinery is in an ill state of repair or mistreated, faults can occur more regularly, increasing the risk of fire.
- Flammable dust or material debris can build up between the belt and rollers. Excess heat caused by friction can cause these fibres to ignite.
- Hot or Burning Materials
- Conveyors are sometimes used to transport hot or burning materials, if this process is not properly managed, they can cause a fire to spread.
- Smouldering Materials
- Some materials, such as coal, can self ignite and smoulder for some time before flames become visible. The dust from this type of material is also extremely combustible.
With the increased risk that conveyors present, it is essential that fire detection is in place to catch any fire events early enough to provide sufficient warning. However, there are some unique challenges with protecting conveyors from fire.
Conveyors are constantly moving. This means they can cause a fire to spread very quickly, but can also make the location of a fire difficult to accurately predict.
Conveyors are also often situated in busy and dusty environments. This means that traditional detection types may be impeded by contaminants in the air or obstructed by other items in the facility. This can lead to slower detection, equipment failure and increased false alarms.
Handpicked Products for a Conveyor Belt
FyreLine Linear Heat Detection provides the perfect detection solution for conveyor applications. It is impervious to dust and other contaminants and can provide a fast and accurate location of fire in even the harshest of environments.
Linear heat detection uses a heat sensing cable to detect changes in temperature. Once a predefined or fixed temperature is reached, an alarm is triggered. In this type of application, heat sensing cable can be installed along each of the rollers and above the conveyor itself to provide an accurate location of any overheat or fire events.
There are two types of FyreLine Heat Detection available:
FyreLine Digital Linear Heat Detection
FyreLine Digital provides fixed heat detection at either 68°C, 88°C, 105°C or 185°C. Once the sensing cable reaches it’s rated temperature, a signal is sent to the fire alarm control panel.
FyreLine Digital Controller
The FyreLine Digital Controller is a dual-zone module for monitoring up to two zones of LHD cable. If an overheat for fire event occurs, the unit displays the distance along the cable to the alarm trigger point. It has power, fault and alarm lights and volt free outputs for fault and alarm. It can also be connected to an industrial process control system using the two wire RS-485 Modbus RTU output.
FyreLine Digital End Of Line (EOL) & Test Switch
FyreLine Digital EOL units with an incorporated test switch can monitor up to two LHD cables or zones and offer hassle-free functional testing of the system. They are used with interface modules to terminate LHD cable and, thanks to their carefully designed printed circuit board, incorporate a test switch that allows the user to simulate trouble, fault and alarm conditions.
FyreLine Digital Nylon, SS LHD Cable
Nylon coated cable is suitable for use where hazardous hydrocarbons such as fuel oils, diesel, kerosene etc. are present. They are black in colour and provide suitable UV protection when used in direct sunlight. Nylon is much tougher than PVC and therefore provides additional mechanical protection. An additional stainless steel braiding over the outside of the cable is included for increased protection in areas where the cable may be accidentally cut or is at risk of mechanical abrasion.
FyreLine Analogue Linear Heat Detection
FyreLine Analogue Linear Heat Detection continually monitors for changes in temperature. This means that the alarm temperature can be defined by the user. A pre-alarm temperature can also be defined, allowing the user to investigate a potential fire before the alarm is raised.
FyreLine Analogue Controller
The analogue control module interfaces between a fire alarm control panel or addressable module and a single zone of Analogue Linear Heat Detection cable. It monitors the resistance of specially doped polymers within the sensor cable which change as a function of temperature. An abnormal change in resistance along the detection cable triggers either a pre-alarm or alarm on the interface module. It is easy to install, commission and maintain.
FyreLine Analogue Non-Sensing Leader Cable
FyreLine Non-Sensing Leader/Interposing Cable is used to bridge the gap between the heat sensing cable and the FyreLine control module. In the case that the control module is not installed near to the protected area, non-sensing leader cable can reliably and cost-effectively carry the signal from the FyreLine heat sensing cable to the interface module.
FyreLine Analogue Nylon, SS LHD Cable
Nylon coated analogue lhd cable is suitable for use where hazardous hydrocarbons such as fuel oils, diesel, kerosene etc. are present. They are black in colour and provide suitable UV protection when used in direct sunlight. Nylon is much tougher than PVC and therefore provides additional mechanical protection. An additional stainless steel braiding over the outside of the cable is included for increased protection in areas where the cable may be accidentally cut or is at risk of mechanical abrasion.
Power Supplies and Accessories
Elmedene Power Supply Unit
These power supply units provide a full rated current at 27.6V DC with an additional current for battery charging. They also support intelligent battery charging and monitoring using Elmdene’s EcoCharge technology and independent volt-free outputs to report mains failure and battery faults, charger faults or loss of output reports. These units are suitable for both FyreLine Analogue and FyreLine Digital.
FyreLine Junction Box
The junction box is a quick and efficient method of interconnecting and joining lengths of an FyreLine Linear Heat Sensing Cable. It can also be used as an in-line junction box for the incoming leader cable. It comes supplied with two glands, and has a five-way DIN rail mounted terminal block within.
The L-Clip is suitable for both indoor and outdoor use and can be used to support FyreLine digital and analogue linear heat detection cable below or above the risk. It is most commonly used on flat mounting surfaces and is available in zintec or stainless steel. Silicone sleeves are included in each pack to insulate and protect the LHD cable.
The P-Clip is suitable for indoor and outdoor use where mounting space is limited. Silicone sleeves are included in each pack to insulate and protect the LHD cable from abrasion, excessive pressure and any heat transfer from a metal mounting bracket to the cable, which may affect the operation of the cable.
FyreLine Stainless Steel Tie Wraps
FyreLine Stainless Steel Tie Wraps are used to safely secure the FyreLine linear heat cable to the chosen clips and brackets.
Why Choose Eurofyre?
- Complete System Supplier
- Eurofyre manufactures and supplies all aspects of fire detection including linear heat detection and its associated products and can provide expert advice and consultation.
- Demonstration and Training
- We offer demonstrations and expert training on a range of systems, including FyreLine linear heat detection systems, in our very own sophisticated training facility.
- After-Sales Support
- Eurofyre offers both on-site and telephone support to assist you in ensuring that your system is fully functional and operating at maximum efficiency. Our after-sales care and support are second to none.
For more information about linear heat detection, or to discuss any of the other products that Eurofyre have to offer, please feel free to get in touch either by phone on +44 (0) 1329 835 024, by email to [email protected] or via the online enquiry form situated on our contact page.