A02 - Statement of Work (SOW) - Whirly Crane.pdf

Scope of Work US Army Corps of Engineers Memphis District (CEMVM)

Whirley Crane Governor Repair

The contractor shall provide the following items listed below:

General Description: This contract is to replace the damaged hoist governor on Revetment Section’s Whirley Crane with a new hoist control.

Contractor Responsibilities: The contractor shall provide all personnel, equipment, supplies, facilities, transportation, tools, materials, supervision, and other items and non-personal services necessary to replace the damaged hoist governor on Revetment Section’s Whirley Crane with a new winch control.

Background: The Whirley Crane’s hoist has a damaged governor that controls a valve which in end controls the speed of the motor that lowers the hoist block.

Scope of Work: PLC & HMI to be used in conjunction to monitor, verify and control speeds of the OMEGA drive while machine is in operation. The PLC and HMI can both be installed in the operator’s cabin to provide the operator with all controls and adjustments at the operator’s fingertips.

Existing speed pick up will be utilized to provide signal back to a PLC Input card. It will read and transmit the speed onto the HMI display. The speed will be verified in the PLC logic to ensure it meets the criteria of the Least Selector and the Remote Speed Adjustor as well as any over speed limits set in the PLC logic. Speed settings will be loaded when the controllers are installed.

A new modernized Remote Speed Adjuster will be installed in the operator’s cabin in place of the existing unit. This will be a detent unit which will send signal back to the PLC, the PLC will analyze and control the OMEGA drive based on the speeds and signal required.

The unit will utilize the existing valves on the OMEGA drive so no retrofitting will be required. They will be controlled by a PLC output signal that has been verified to meet all criteria in the logic.

Additional features will be included in the HMI to increase safety, provide current data of the operating system and record alarms that relate to the operation of the machine.

All hardware will be rated for its installed environment and use. The hardware used in the system is reviewed and ensured that it can be supported for a minimum of 10 years.

New controller to include the following:

Speed setting dial for least speed limit – to be an incremental adjustor on HMI display

Adjustable potentiometer to allow for the operator to increase or decrease speed at the operator station (In operator Cabin) Minimum Speed settings to be adjustable on the HMI display

Maximum Speed settings to be adjustable on the HMI display

Tach read out on the HMI display

Voltage & current meter on HMI display

Alarm logger

Contractor must provide access into the PLC, a copy of the PLC Logic and passwords.

Shipping/Delivery/Setup: The Contractor is responsible for all shipping, installation, and material handling.

Intended Use: The new valve control will allow crane operator’s to have better control of the load when lowering. This will allow safer operation.

End Item Application: The new hoist control will allow Crane operators to safely use the hoist as intended by the Original Equipment Operator.

Warranty: All Parts must be warranted by the manufacturer.

Place of Performance: All items listed above shall be delivered to EEY Plant Section. Deliver to USACE, Ensley Engineering Yard, and ATTN: Marvin Roddy or Cory Roberts, 2915 Riverport Road, Memphis, TN 38109 30 days after contract award or sooner, P.O.C for questions regarding specs please contact Nicholas Schrup at 901-831-0927.