North Fork Electric Inc.

 

1309 WILLIE BROWN ROAD CRUMPLER, NORTH CAROLINA 28617
PH 336-982-4020 FAX 336-982-9453

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The Dragrake

    

The Dragrake is an extremely effective and durable intake cleaning system with a unique approach to handling trash. Compared with other systems the Dragrake has greater raking width, unparalleled speed and strength, as well as the ability to dredge the canal floor upstream of the intake.

Most systems rake only a narrow swath, operate very slowly and require an operator. These systems are no match for large, water-soaked logs and few are able to remove any material build-up in front of the rack area. Rolling carriage type rakes have a tendency to pack trash to the bottom and cannot remove silt and debris which collect upstream of the rack face. Backhoe type machines are greatly limited in strength and raking width. The Dragrake does an excellent job of removing all types of trash from the rack itself but more importantly, it dredges the canal floor upstream of the rack face for whatever distance is required.

The Dragrake is available up to 45 feet wide and can clean and dredge a 60 foot deep intake in 2 minutes. For intakes over 45 feet in width, multiple Dragrakes are installed. This allows thousands of square feet of intake to be cleaned in minutes, automatically!

At sites where siltation is a problem the Dragrake's performance is superior to other cleaning systems. At one site previous to installation of a Dragrake, the plant required an annual shut-down for silt removal costing the owner valuable run time as well as the cost of excavation. Since installation of our system over eight years ago, the Dragrake has prevented silt from accumulating in front of this intake. In addition, it has prevented silt from traveling further down the canal to other intakes. No shutdowns have been required for silt removal. In addition this site has seen increased production and decreased labor cost.

 

 

 

Operation

The Dragrake operates by a system of motorized cable hoists which move a raking beam in a cyclical motion. This cycle begins with the raking beam at the trash dumping position located at the top of the trash rack. The raking beam is hoisted upstream and lowered into the water to the bottom of the intake several feet upstream from the toe of the trash rack. The raking beam now dredges the bottom of the intake until it reaches the bottom of the trash rack whereupon it rakes up the rack face bringing its trash load to the dumping position. This action allows the Dragrake to dredge debris which accumulates upstream, impeding flow and limiting production.

The raking beam has a replaceable leading edge, flushing windows to allow silt and very small debris to pass through the trash rack and spring-loaded tines to remove impacted debris from in between the trash rack bars. Adjustable attachment chains allow for changes in the raking beam's angle to accentuate either its dredging or raking action. All components are accessible from above water level eliminating equipment failure which would require dewatering or diving for repair.

The Dragrake can capture and lift thousands of pounds of trash each cycle, cleaning the entire trash rack area. Systems in operation have proven themselves by raking logs twenty-six inches in diameter by twenty-five feet long weighing well over two thousand pounds.

The Dragrake system operates automatically by a programmable logic controller or manually by a joystick control handle. Five selectable cycle time delays are provided for varying trash conditions. Rack differential sensing is available. Each winch motor has its own power monitoring relay to prevent overload or possible damage in the event of the rake beam hanging up.

 

NIAGARA

 

GENERAL INFO

SPECIFICATIONS

FABRICATION

 

 

SEE TRASH!!

SEE GRASS!!

SEE UNUSUAL!!

 

 

DRAGRAKE GALLERY

CHEROKEE FALLS SC
Enel NA
2014
 

BRYSON NC

Duke Power

2015

MARSHAL Duke Power

1998-2015

ATLAS POLAR™ REMOVAL

2015 UPGRADES

DRAGRAKE INSTALLATION

2015 UPGRADES


UPPER PACOLET SC Lockhart Power
2013

COLUMBIA SC Lockhart Power

2013

 

STEVENS CREEK GA
SCE&G
2007

PARR SC SCEG
2006

MARMET WV

AEP

2006

 

99 ISLANDS SC

Duke Power

2005

 

 

MAMGUAM BRITISH COLUMBIA

Canadian Hydro Developers

2005

 

 

Mascoma NH
Enel NA

2005

LONDON WV

AEP

2004


WINFIELD WV

AEP

2002

 

NIAGARA VA

AEP

2002

 


LOWER PACOLET Lockhart Power

1998

PIEDMONT SC

Enel NA

1998

Neal Shoals SC
SCEG

1998


BUCK VA

AEP

1997

 


BYLLESBY AEP

1996


VICTORY MILLS NY Enel NA

1996

 

LOCKHART SC Lockhart Power

1996


LOWER PELZER Enel NA

1996

 

Ware Shoals SC
Enel NA

1996

Upper and Lower LaChute, Ticonderoga N.Y.

Enel NA

1996

 


Missisquoi
Enel NA

1996


Woodside 2 SC
1995

UPPER PELZER Enel NA

1993

Eastman Kodak

 Columbia S.C.

1992

FRIES Enel NA

1990 - 1994


Cresent MA
Enel NA

1996


Eagle and Phenix GA.
1996

Long Shoals NC
1995

High Shoals NC    

Millstead GA
Enel NA

1985


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This website and the names, "North Fork Electric", "NFEI" and "Dragrake" are
2017,
North Fork Electric, Inc