4B TOUCHSWITCH – Belt & Pulley Alignment Sensor

A Worldwide Manufacturer of High Quality, Technologically Advanced Material Handling & Electronic Components 4B has the world`s largest range of elevator components, leading the field in elevator bucket and bolt design and manufacture and supplying the highest quality forged chain and elevator belting. 4B`s electronic division specializes in level controls, intelligent sensors and safety control systems that prevent costly downtime and minimise the risk of explosions in hazardous areas. 4B is your professional partner for the design of new bucket elevators and conveyors and upgrades of existing machines, a design service which we offer free of charge and supported by our full guarantee. 4B serves a large range of industries, including Grain Handling & Processing, Brewing & Distilling, Food Industry, Bulk Material Handling, Quarries & Mining, Coal, Cement & Aggregates, etc.

About VICTAM Asia 2022 in co-location with Health & Nutrition Asia VICTAM ASIA is firmly established as the event dedicated to the animal feed processing industry within Asia. Co-located with VICTAM Asia 2022 is VIV Health & Nutrition, making this the total animal feed and health event organized by Victam and VIV. VICTAM Asia and VIV Health & Nutrition is also home to GRAPAS Asia, the event for grain, rice and flour milling technology. The exhibition will be organised at the IMPACT Exhibition Center in Bangkok, Thailand. The conferences and technical seminars will take place simultaneously.

Choosing the right belt alignment sensor Belt misalignment is a common problem in belt conveyors and bucket elevators. When the belt is severely misaligned it can cause damage to the machine casing while generating dangerous heat in dust hazard environments. Two typical methods of detecting belt misalignment are the rub block and the Touchswitch. The Rub Block consists of soft brass with an embedded temperature sensor. The sensor alarms when the brass heats to the trip temperature. Three main drawbacks exist for this sensor. First, by the time the brass heats, the belt has already been misaligning for a period of time. Second, the belt could periodically rub against the brass and move away, wearing through the rub block without ever giving an alarm, leaving you unprotected. Finally, there is no simple way to test the rub block without introducing heat into a potentially hazardous environment. The Touchswitch design addresses these 3 issues. First, it detects the lateral force of the belt, and gives

Mechanical belt misalignment sensor Belt misalignment on an elevator is a problem that is difficult to solve because it needs to be adapted for each elevator and type of elevator. When traditional techniques are used such as inductive, magnetic and capacitance sensors, different factors need to be considered: elevator size, bucket size, bucket type (steel, stainless steel, “plastic”, aluminium…), type of transported product, because in this case it is the buckets that the sensors detect. This is not always easy and sometimes difficult to realize. The TOUCHSWITCH is a new type of stainless steel sensor that has been designed to solve the problem of belt misalignment detection in zone 20 on conveyors and especially on elevators. The Touchswitch reacts to the pressure exerted on its front cover by the misaligned belt or pulley. The sensor communicates with a relay contact which triggers an alarm or stops the machine. The sensor is easy to adjust and can be used with pressures between 2 and 5 kg.

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