Home About UsContact Us                                                                    
info@dmmas.com
 
                                                                                                   
 
DMMAS
  Monorail Control Panel  
     
     
     
                                   
       
 
Design & Manufacturing
   
       
 
of
   
       
 
Mechanical Applications & Systems
   
       
                                                                                                   
                                                                                                   
                                                                                                   
 

MONORAIL-TYPE

 
Parent System «
 
 

WEED SCREEN CLEANING SYSTEMS

 

MONORAIL CONTROL SYSTEM:

 
       
TRACK
This control system constitutes a governing component of our monorail-type weed screen cleaning systems installed at open-source water intakes of some irrigation pumping stations in Egypt. A General Electric Programmable Logic Controller represents the main system responsible for controlling electric motors, hydraulic components, sensors, motion limiters, protection devices and fault indicators. It comprises a control panel, a control paddle, horizontal and vertical stroke limiters, trolley and track sensors. An auxiliary traditional control system works as a substitute for the main PLC system. The auxiliary system enjoys simplicity and easy fault detection and repair. It exhibits same control accuracy as the main system. While the main control system enables manual, semi-automatic and automatic operation modes, the auxiliary system is only capable of enabling the manual mode. Security and emergency stops are provided by both systems under any mode of operation.
 
                             
       
TROLLEY
 
                             
       
GRAB
 
                             
       
CONTROL SYSTEM
 
                             
                             
                             
                                                                                                   
                                                                                                   
                                                                                                   
 

Two-Door Control Panel

Two-Door Control Panel

Control Panel Inside View

Control Panel Inside View

Control Panel Outside View

Control Panel Outside View

Control Paddle

Control Paddle

Parent System

Parent System

 

   

CONTROL PANEL:

Appropriately located at the maintenance platform, the control panel allows for grab motion monitoring during operation. The panel is connected to the main feeding cable and some other system components. A PLC/NO PLC selection switch is used to launch either the main or auxiliary control system. Though same control accuracy is preserved in both systems, lowering the grab manually at a wrong cleaning location would damage the grab, the screen bars and the concrete platform. This represents a constraint on the use of the auxiliary system and operators are strongly advised to only resort to it when the main system is out of order.

OPERATION MODES:

The automatic operation mode of our monorail-type weed screen cleaning systems is available through a keyboard. The program opts the number of cleaning cycles in each cleaning location and the inter-cycle rest time. This operation mode is only supported by the main control system. Manual and semi-automatic operation modes of our monorail-type weed screen cleaning systems are available through the use of a control paddle connected with a flexible ten-meter-long electric cable. Sockets are fixed to the track vertical supports centrally-located in the station intake. The control paddle comprises two selection switches and six control buttons. A selection switch is used to choose between the two operation modes. Another selection switch is provided to decide whether to bypass the next cleaning drop during manual operation or to complete the cleaning and discharge cycle during semi-automatic operation. The six control buttons provide control over the motion of the trolley and the grab during manual operation. Two buttons control the movement of the trolley towards water intakes and its return to the discharge area. Two buttons are used to lower and elevate the grab and the last two control opening and closure of the grab movable jaw. The manual operation mode is supported by both the main and the auxiliary control systems while the semi-automatic mode is only supported by the main system.

SECURITY STOP:

The winch is self-stopped, pertaining red LED's on the control panel are turned on and the alarm is activated in case of wire slackness or grab overloading.

WIRE SLACKNESS:

A malfunction or improper adjustment of the proximity switch determining the grab stroke lower end would cause the grab to continue descending until it settles-down on the water intake bottom. Alternatively, damage of some weed screen bars may impede the grab downward motion and force it to stop before completing its stroke. The grab winch wire rope would slacken in either case and the winch is self-stopped.

GRAB OVERLOADING:

Overloading takes place when the tension in the wire rope exceeds the maximum load carrying capacity. This may take place due to overweight of collected bodies. Alternatively, some screen bar may be so dislocated that it hinders the grab upward motion. This can be identified by repetitive grab stops at some particular location.

 
                                                                                                   
 

 

EMERGENCY STOP:

In case of emergency, an emergency push button is pressed. This stops the trolley at its current location, turns on red LED's on the control panel and activates the alarm continuously. The system will never resume operation unless emergency causes are removed, emergency button is returned to its normal position and the reset button on the control panel is pressed.

 
                                                                                                   
                                                                                                   
                                                                                                   
             
Home About UsContact UsMarine & Shipyard Machinery Material Handling Systems Aquatic Weed Removal Equipment
             
                                                                                                   
                     
Weed Screen Cleaning SystemsDrainage Network Cleaning MachinesSpecial-Purpose Machines
                     
 
                                                                                               
                                 
Copyright © 2009 - 2010 DMMAS . All Rights Reserved .
                                 
                                                                                                   
                                       
Developed by WebTechAvenue