Hopper vibrators
Powdery materials and products stored in silos or hoppers often tend to clog. This leads to the formation of crowns and chimneys, with the following effects:
• reduced storage capacity;
• major flow irregularities at the outlet of the hopper, even resulting in a complete halt of the flow.
Setting the walls of silos or hoppers at a considerable slope—which has the disadvantage of reducing storage capacity—does not resolve the problem of clogging, since it happens even with vertical walls.
De-clogging devices pay for themselves very quickly, since they guarantee:
- use of 100% of storage capacity
- no more production interruptions.
SINEX recommends a technique of de-clogging by external vibration, using rotary, electromagnetic or pneumatic vibrators, which can de-clog low- to medium-capacity silos and hoppers; this vibration should cause a slight deformation of the walls to which the vibrators are attached.
DE-CLOGGING BY ELECTROMAGNETIC VIBRATORS
• The amplitude of the vibrations can be adjusted during operation by a rheostat.
• The possibility of instant stopping to avoid unwanted vibrations on the weighing instruments is especially useful when de-clogging weighing bins.
• Voltage: single-phase 220 or 380 volts, 50 Hz.
See our range of vibratorsDE-CLOGGING BY ROTARY VIBRATORS
• The thrust can be adjusted by shifting the unbalances.
• The option of intermittent vibration, by adding a control card, guarantees consecutive starting and stopping of the vibrator (for example, 15 seconds of operation followed by 45 seconds of stopping). During the slow-down that occurs after cutting the power, the vibrator "couples" with the resonant frequency of the hopper, causing the crowns or blockages to collapse.
• Voltage: three-phase 220 or 380 volts, 50 Hz.
See our range of vibratorsDE-CLOGGING BY PNEUMATIC VIBRATORS
In places with explosive, gaseous or dusty environments, pneumatic vibrators—which are easy to install and operate in any position—can be used for de-clogging weighing bins or low-capacity bins.
• Compressed air: 6 to 8 bars.