3D Hydro Mechanical (Gates)

Classification of gatesClassification of gates

Emergency / repair gateEmergency / repair gate Bulkhead gateBulkhead gate Construction (diversion) gateConstruction (diversion) gate

1.1. By gateBy gate’’s Functions Function

SteelSteel ConcreteConcrete PlasticPlastic Composite materialComposite material ectect


2.2. By the gateBy the gate’’s materials material

Plane gatesPlane gates Radial gateRadial gate Stop logStop log


3.3. By GateBy Gate’’s structures structure

Component of Gate SystemComponent of Gate System

Consist of skin plate, beams rollers, Consist of skin plate, beams rollers, lifting eyes,lifting eyes,……. ect.. ect.

Lifting eye

Seal part

Horizontal main beams

Skin plate

Vertical main beams

Main rollers

1.1. Gate leafGate leaf

Lifting eye

Seal part

Gate leaf

Support arms

Support hinge

Skin plate

Consist of side guides, sliding Consist of side guides, sliding paths, sealing surface, sill and paths, sealing surface, sill and lintelslintels

Component of Gate SystemComponent of Gate System

2.2. Embedded partsEmbedded parts

Hydraulic cylinder hoistHydraulic cylinder hoist Gantry craneGantry crane Screw drive hoist Screw drive hoist

Component of Gate SystemComponent of Gate System3.3. Hoisting deviceHoisting device

Types of gatesTypes of gates

Fixed wheel gateFixed wheel gate Radial gateRadial gate Stop logs / Bulk head gateStop logs / Bulk head gate

The fixed wheel gate or roller gate is the The fixed wheel gate or roller gate is the most used type of hydraulic gate, because most used type of hydraulic gate, because its field of application is very large: its field of application is very large:

Sliding Gates have similar functions as fixed Sliding Gates have similar functions as fixed wheel gate but without wheelswheel gate but without wheels. .

Fixed wheel gateFixed wheel gate

it can be used in it can be used in water intakeswater intakes draft tubes, draft tubes, bottom outlets, bottom outlets, as canal lock doors as canal lock doors structure of regulation in surface structure of regulation in surface

spillwaysspillways..


The main application of the fixed wheel The main application of the fixed wheel gates, gates,

application needapplication need protection elements, protection elements, capable of closing by gravity capable of closing by gravity regardless ofregardless of the conditions of the flowthe conditions of the flow. .


Steel wire rope hoists are sometimes also adopted Steel wire rope hoists are sometimes also adopted for operating the fixed wheel gates, but this is a for operating the fixed wheel gates, but this is a solutionsolution less usedless used as it incursas it incurs very high very high maintenance costsmaintenance costs. .

Sliding Gates have similar functions as fixed wheel Sliding Gates have similar functions as fixed wheel gate but without wheelsgate but without wheels. .


• Radial gatesRadial gates

Radial gatesRadial gates

Radial gates are mostly used to Radial gates are mostly used to control the water level retained by dams control the water level retained by dams

or inside channels. or inside channels. spillways on large dams /bottom spillways on large dams /bottom

discharges. discharges. river equipment (ship locks)river equipment (ship locks)


In some cases, a flap is installed on the In some cases, a flap is installed on the upper part of the radial gates in order to upper part of the radial gates in order to enable a more precise regulation of the enable a more precise regulation of the water level or to pass floating debris. As water level or to pass floating debris. As such, the water can pass over the top of such, the water can pass over the top of the gatethe gate. .

Radial gatesRadial gates Its surface can have outstanding Its surface can have outstanding

dimensions (400 sqm. or moredimensions (400 sqm. or more(. (.

The radial gates are made as a welded The radial gates are made as a welded construction. construction.

The gate component is:The gate component is: gate leaf consists ofgate leaf consists of

skin plate (made up of several curved skin plate (made up of several curved elements corresponding to the required elements corresponding to the required curvature of the whole gate and is reinforced curvature of the whole gate and is reinforced with horizontal and vertical stiffeners.with horizontal and vertical stiffeners.((

armsarms..


trunnions. The rotation of the gate around the trunnions. The rotation of the gate around the axis is guaranteed by the trunnions. The axis is guaranteed by the trunnions. The trunnion axles are made of hard chrome or trunnion axles are made of hard chrome or stainless steel and supported by self-lubricating stainless steel and supported by self-lubricating bronze bushings. The trunnion brackets are bronze bushings. The trunnion brackets are anchored to the piers by means of steel or anchored to the piers by means of steel or prestressed concrete beamsprestressed concrete beams..


The gate sealing is made by means of The gate sealing is made by means of rubber joints assembled in the structure rubber joints assembled in the structure of the gates and, it acts against the of the gates and, it acts against the stainless steel embedded partsstainless steel embedded parts..

The embedded parts incorporated in the The embedded parts incorporated in the piers consist of curved lateral seal piers consist of curved lateral seal beams and a sill beambeams and a sill beam. .

The gates are opened and closed by The gates are opened and closed by means of one or two servomotors fed by means of one or two servomotors fed by a pressurized hydraulic circuit or, a pressurized hydraulic circuit or, alternatively, by electrically operated alternatively, by electrically operated wincheswinches. .


• StoplogsStoplogs

StoplogsStoplogs Stoplogs are welded steel structures Stoplogs are welded steel structures

designed to close the water intake designed to close the water intake openings, or to isolate parts of water openings, or to isolate parts of water channels, mainly for purposes of inspection channels, mainly for purposes of inspection and maintenance of the respective control and maintenance of the respective control equipment, located downstreamequipment, located downstream. .

According to the structure type, the According to the structure type, the stoplogs may be classified asstoplogs may be classified as: :

Surface stoplogsSurface stoplogs Deep sluice stoplogsDeep sluice stoplogs

Depending on the height, the stoplogs may Depending on the height, the stoplogs may be supplied in one or more units resting on be supplied in one or more units resting on each othereach other. .

The stoplogs are operated by a The stoplogs are operated by a moving gantry crane / a mobile moving gantry crane / a mobile crane or equivalent equipment with crane or equivalent equipment with the help of a grappling beam the help of a grappling beam (fishing beam(fishing beam((

The grappling beams are fitted with The grappling beams are fitted with a mechanism that automatically a mechanism that automatically engages and disengages the stoplog engages and disengages the stoplog elementselements. .

StoplogsStoplogs

The operation of raising or lowering a The operation of raising or lowering a stoplog element from or into its groove is stoplog element from or into its groove is always performed in balanced water always performed in balanced water conditions (same water level upstream conditions (same water level upstream and down-stream of the stoplogand down-stream of the stoplog( (

If there are many element collected If there are many element collected together by joint plates and pins then they together by joint plates and pins then they can named Bulk head gatescan named Bulk head gates

StoplogsStoplogs

Rubber sealsRubber seals

2 Skin Plate

2 Rubber Seal

3 Side girder

4 connection pins, plate

5 main girder

6 connecting rod

7 slot, gate frame

1 fill opening

Bulk head gateBulk head gate

The operating system is composed of The operating system is composed of servomotor, servomotor, hydraulic power unit, hydraulic power unit, oil piping, oil piping, position indicator position indicator and electric control panel for command and electric control panel for command

and signalingand signaling. .

• Gate Gate operating system operating system

• trashrackstrashracks

• TrashracksTrashracks

• Trashracks Trashracks الواقي الواقي الشبك الشبك

Protecting the water intakes, channels, penstocks, Protecting the water intakes, channels, penstocks, galleries and other types of hydraulic structures galleries and other types of hydraulic structures against the inlet of debris, of vegetation, urban or against the inlet of debris, of vegetation, urban or industrial trash, is achieved by the use of Trashracksindustrial trash, is achieved by the use of Trashracks..

The Trashracks are a welded construction comprising The Trashracks are a welded construction comprising of panels formed by a set of parallel bars, equally of panels formed by a set of parallel bars, equally spaced at a distance defined by the charge load,spaced at a distance defined by the charge load, permissible vibration level and flow conditions. These permissible vibration level and flow conditions. These bars are fixed to a support structure, which are either bars are fixed to a support structure, which are either embedded in the concrete or movableembedded in the concrete or movable..

.

There are two types of trashracksThere are two types of trashracks: : Fixed trashracks, bolted to steel pieces Fixed trashracks, bolted to steel pieces

embedded in the concrete around the embedded in the concrete around the sluicesluice

Removable trashracks, operated by a Removable trashracks, operated by a crane using a grappling crane using a grappling

The accumulation of debris over a period The accumulation of debris over a period of time onto the trashracks obstructs the of time onto the trashracks obstructs the free flow discharge, thereby causing the free flow discharge, thereby causing the increase in the head lossesincrease in the head losses. .

• Trashracks Trashracks الواقي الواقي الشبك الشبك

To clean the trashrack is a critical operation that To clean the trashrack is a critical operation that may be automated by a trashrack cleaning may be automated by a trashrack cleaning machinemachine..

The trashrack cleaning machines may be The trashrack cleaning machines may be of fixed type,of fixed type, serving only one clearance; serving only one clearance; or of movable type, cleaning multiple racks or of movable type, cleaning multiple racks

along the intakealong the intake.. The operation of a trashrack cleaning machine The operation of a trashrack cleaning machine

may be may be manual, manual, semi-automatic semi-automatic or with different degrees of automation or with different degrees of automation

according to customeraccording to customer’’s requirementss requirements

Trashracks cleaning machine الواقي الشبك نظافة كرين

Gantry Cranes

PT welding test

Welding Tests

Ultrasonic Examination

Oxygen cutting

Water jet cutting

Plasma cutting under water

Merowe DAM EQUIBMENTS










EQUIBMENTS Of Contract 3D

Fixed wheel emergency repair gatesFixed wheel emergency repair gates ten power intake service gate (9.6x10.7m-ten power intake service gate (9.6x10.7m-

3Sections )3Sections ) one inlet portal of low-level sluices one inlet portal of low-level sluices

(5.24x6.4m-2pcs)(5.24x6.4m-2pcs) two spillway (temporary gates)(3.4x16.3m-two spillway (temporary gates)(3.4x16.3m-

16pcs)16pcs) two bottom out let gates (7.3x14.4m-4pcs )two bottom out let gates (7.3x14.4m-4pcs )

Bulkhead gateBulkhead gate’’ss four power intake repair gate (9x15 m- four power intake repair gate (9x15 m-

5pcs)5pcs) eight draft tube (9x7.5 m-3pcs)eight draft tube (9x7.5 m-3pcs) one outlet of LLS (5x7.5 m-3pcs)one outlet of LLS (5x7.5 m-3pcs) four inlet portal of low-level sluices four inlet portal of low-level sluices

(5.24x6.4m-2pcs)(5.24x6.4m-2pcs)


Radial gatesRadial gates sex outlet of LLS (4.97x5.1m)sex outlet of LLS (4.97x5.1m) two Spillway (14.5x15m)two Spillway (14.5x15m) twelve Bottom outlet (6x13.8)twelve Bottom outlet (6x13.8)

StoplogsStoplogs two downstream dam spillway (temporary) two downstream dam spillway (temporary)

(2x16m-10pcs)(2x16m-10pcs) Penstock Steel Liner:Penstock Steel Liner:

Total length 57.455 m Total length 57.455 m


Documents

3D Hydro Mechanical (Gates)