Skip to main content

Bulldog

Conveyor Belt Alignment & Rip Detection Switch
Part numbers
MBA2AI, MBR2AI, MBA2RAI
Electronics Application
Belt Conveyor
Certification

ATEX

ATEX
Image
ATEX Logo

UKEx

UKEx
Image

IECEx

IECEx
Image
IECExv3

CCC

CCC
Image
CCC-logo

CE

CE
Image
CE Logo
Product Features
  • Conveyor Belt Misalignment & Rip Detection System
  • Electro-mechanical system designed to detect dangerous misalignment of the conveyor and also detection of belt tear damage
  • Triggers an alarm at 20º and a shutdown of the machine at 35º
  • Easy installation
  • Robust design
  • No calibration required
  • Nylon rollers as standard; stainless steel rollers available on request

Bulldog

Conveyor Belt Alignment & Rip Detection Switch
Bulldog - Conveyor Belt Misalignment & Rip Detection System

The Bulldog alignment and rip detection switch is an electro-mechanical system designed to detect dangerous misalignment of the conveyor and also detection of belt tear damage. The switch will detect horizontal misalignment of belts when contact is made with the roller, the roller arm will be forced to pivot by the belt activating a switch at 20º to trigger an alarm, and 35º to trigger a shut down procedure of the conveyor. The sensors are usually installed in pairs on opposite sides of the belt.
A steel flexible wire is set below the running conveyor belt approx 20-30mm attached by a rare earth magnet at each end. If the belt is ripped or damaged the wire is pulled away releasing the magnet connection which in turn will activate a switch.

    New Product
    IE-Node

    IE-Node

    The Industrial Ethernet Node (IE-NODE) is a remote monitoring interface designed to provide sensor data to PLC’s or other automation and control systems.

    Both units can be expanded to 16 sensor inputs with the installation of optional expansion boards.

    Watchdog Super Elite hazard monitor (WDC4)

    Watchdog™ Super Elite (WDC4)

    Combined belt speed (slip), belt alignment, continuous bearing temperature, pulley alignment and plug condition monitor for bucket elevators and conveyors.
    Superseded
    T500 Elite Hotbus™ elevator & conveyor monitoring system

    T500 Elite Hotbus™

    Monitors up to 256 sensors: temperature, alignment, speed...
    B400 Elite Beltswitch

    B400 Elite Beltswitch

    The B400 Elite Beltswitch belt misalignment monitor uses 4B Touchswitch sensors to monitor belt alignment in bucket elevators and conveyors. Each control unit incorporates two independent monitoring circuits for early detection of belt misalignment on one or two bucket elevators / conveyors. The 4B Touchswitch is an electro-mechanical limit switch with no moving parts.

    Can I use the Bulldog to monitor belt alignment on a bucket elevator?

    No. The Bulldog is designed to monitor belt alignment and/or rip on open belt conveyors. Because it requires deflection of the roller to detect misalignment, it is not suitable for bucket elevators or enclosed belt conveyors.

    Will the same model of bulldog monitor both belt alignment and rip or do I have to choose one or the other?

    Bulldogs are available in various configurations including belt rip only, belt alignment only, or both belt rip and alignment. See the manual for the correct part number for your application.

    How many bulldogs are required to monitor my open belt conveyor?

    There will generally be a minimum of four bulldogs required to monitor an open belt conveyor. One pair will be mounted near the head pulley and the second pair will be mounted near the tail pulley. Depending on the length and other attributes of the conveyor, more bulldogs may be needed to fully protect the belt.

    Hazard Monitoring Design Service

    Preventative maintenance can help reduce the risk of equipment failure and consequent downtimes. When it comes to monitoring your bucket elevators and belt conveyors, 4B can recommend you the ideal combination of sensors and monitoring systems to suit your requirements and budget.

    4B provides an extensive range of their own ATEX / IECEx / CSA approved hazard monitoring systems, misalignment switches and bearing temperature monitors and level controls. We can offer you anything from a replacement sensor to a fully integrated hazard monitoring system which can be operated either as a stand-alone system or connected to your PLC.

    And if you do not want to install hazard monitoring sensors on every piece of equipment in your plant straightaway, we can offer you a scalable solution starting with carefully chosen equipment and systems that can be expanded at a later date to encompass other machines in the plant.

    We can also offer you an installation service, and we do provide a competent after-sales technical service to help you overcome any technical problems with your monitoring equipment.

    To get a recommendation from our engineers, please fill in the electronics questionnaire below. Please fill this form in as accurately as possible to allow us to deal with your enquiry more effectively.

    Contact Details

    Elevator Information

    Monitoring Requirements (Check All that Apply):

    Conveyor Information

    Monitoring Requirements (Check all that Apply):

    Silo/ Bin Information

    Monitoring Requirements (Check all that Apply):

    If you would like to send us a technical drawing or document with your enquiry, please send to 4b-uk@go4b.com.

    CAPTCHA
    This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.