PPT Inženjering AD, 37-39, Bulevar Vojvode Mišića St., 11000 Belgrade

phone: +381 11 369 0 168; Fax: + 381 11 369 0 479, office@ppt-inzenjering.rs

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1. Saint Petersburg RUSSIA-2006

     1.1   S2 Saint Petersburg RUSSIA-2006
         

Electro-hydraulic gate lifting system, Saint Petersburg water lock S2.

Cylinder Ø 800/320x120000 mm ……………………………………………. 4 pcs
Hydraulic drive unit
(Reservoir V = 5000 l, 2 +1 pump units Qmax = 180 l /min, p = 320 bar, 90 kW) ... 2 pcs.

Designed and supplied was electro-hydraulic power system for raising and lowering the slide gate with width of 116m and weight of about 2700 tons on turnkey basis. When all resistances and expected ice thickness are counted, the design weight has been defined at 5000 tones. The computer system is based on S7-400, both for working and backup system. Communication between the computer's hardware is done through PROFIBUS-DP, both for working and backup. Within the span of 116 m, the accuracy of achieved synchronous movement is 5 to 20 mm.

   1.2    S1 St. Petersburg RUSSIA-2006
         

Hydraulic system for driving gate, slide and sector gates.
Cylinder Ø 320/140x3000 mm ………………………………………………4 pcs
Cylinder Ø 250/125x2700 mm ………………………………………………2 pcs

Hydraulic drive unit
(Reservoir V = 250 l, 1 +1 pump units Qmax = 60 l /min, p = 350 bar, 15 kW)..4 pcs.
(Reservoir V = 250 l, 1 +1 pump units Qmax = 25 l /min, p = 320 bar, 4 kW)…. 4pcs

Designed and delivered was complete electro hydraulic system for two sector gates and two slide gates, which represent an auxiliary hydro-mechanical equipment for main sector gates with electric motor drive (locomotive). Cylinders for sector gate are delivered together with supports and bearings (cardan joint, universal joint) for sector gates. Each cylinder has an integrated stroke sensor of Balluff type in the piston rod. For each cylinder of sector and slide gate a separate hydraulic power pack was delivered.

2. DAM “GRUŽA”, SERBIA- 2006

Repair works on:
Conical gates NO1300 - Damage repair ………………………………………..3 pcs
Slide gates – General repair of hydraulic cylinders …………………………... 4 pcs

3. DAM “Vrutci "-2006

Repair works performed on:
Conical gates NO1300 - Damage Repair... ... ... ... ... ... ... ... ... ... ... .. ………..4pcs
Slide gates - Repair of hydraulic cylinders ... ... ... ... ... ... ... ... ... ... ... ............ 4 pcs
Draining pumps - Delivery of new units ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 2 pcs

4. PUMPING STATION ON THE WEST MORAVA RIVER - SERBIA 2007

Construction of water intake on the Zapadna Morava River was performed, together with pumping station (implementation of Phase II), where hydro-mechanical and electric part was done in Trstenik.
Completely new hydraulic and electrical installation with associated construction works at pump station has been installed.

5. V1-V6 FLOOD PROTECTION OF THE CITY OF SAINT PETERSBURG, RUSSIA 2008

Electro-hydraulic drive is intended for maneuvering 64 segmented gates facility V1-V6, in order to prevent flooding of the city of Saint Petersburg.

Cylinder Ø 450 / Ø 200 x 4500 (7500) mm ………………………………..…64 pcs
Control blocks ................................................ .................................................. 64 pcs
Hydraulic drive unit
(Tank, V = 12000 l, two pump units Q = 180 l /min, p = 320 bar, N = 75 kW) 6 pcs.
Electric control cubicles............................................ ......................................... 6 pcs
New operating units were factory tested and delivered, as well as new control blocks, new electric cubicles and new distribution pipe that are all installed in conjunction with existing-refurbished hydraulic cylinders.
Design, manufacture and supply of electro-hydraulic control system, on-site installation, testing, commissioning as well as on-site theoretical and practical training of the staff has been done. Control blocks allow simultaneous lowering of up to 12 gates providing synchronous movement of cylinders of each gate.

6. Dam “GAMGOUM", Tunis 2008

WATER PUMPING TOWER
Cylinder Ø 140 / Ø 63 x 1350 mm ………………………………………………. 3 pcs
(With built-in stick position indicator)
Hydraulic drive unit
(Reservoir V = 250 l, two pump units Q = 6.3 l /min, p = 250 bar, 2.2 kW )........ 1 pc.
Control blocks ................................................ ....................................................... 3 pcs
Electric control cubicle ............................................... .......................................... 1 pc
Pipeline with additional equipment ....................................................................... 1 set
Hydraulic drive is designed to maneuver three slide gates of water pumping tower.

EXIT GATE ROOM

Cylinder Ø 140 / Ø 63 x 1350 mm ………………………………………………1 pcs
(With built-in stick position indicator)
Hydraulic drive unit
(Reservoir V = 250 l, two pump units Q = 6.3 l /min, p = 250 bar, 2.2 kW )........ 1 pc.
Control blocks ................................................ ....................................................... 1 pc
Electric control cubicle ............................................... .......................................... 1 pc
Pipeline with additional equipment ........................................................................ 1 set

Hydraulic drive is designed to maneuver a slide gate of the exit gate room, as well as to drive the butterfly gate at the exit pipe.

Design, project coordination, production of equipment, factory testing, packing for overseas transport, delivery of equipment and supplies for water pumping tower and exit gate room, as well as delivery of complete technical documentation with instructions to dam GAMGOUM in Tunisia was completed in 2008. Electro-hydraulic equipment was put into operation in 2009 and final handover of equipment was performed.

7. DAM ON RIVER TISA, SERBIA, 2008

General overhaul of hydraulic installation of water lock on the Tisa dam, field number 1, has been performed.
Complete overhaul of hydraulic installations has been undertaken, as follows:

- Reparation of hydraulic cylinders Ø 500 / Ø 200 x 5200 mm of segmented gate........... 2 pcs.
- Reparation of hydraulic cylinders Ø 250 mm x 1500 of flap of segmented gate ............. 1 pc.
- Overhaul of hydraulic blocks ................................... 2 pcs.
- Overhaul of hydraulic power unit .................................. 1 pc.
- Reparation of pipelines and related equipment on the pipeline

8. DAM “BRESNICA"-PROKUPLJE, SERBIA 2008
  
General overhaul of hydro-mechanical equipment on the water pumping tower and pipe gallery of the slide gate, crane repair, substitution of flat gate NO 800 with butterfly gate NO 800, dismantling of flat slide valves NO 350NP10 (3 pcs) and substituting them with Butterfly gates that are electronically driven, delivery and installation of electric cubicle for gate drive , corrosion protection of equipment in the gallery and water pumping tower (pipeline NO 800 and NO 350, area P = 800M) on dam "Bresnica" - Prokuplje.

9. VOLGA-DON CANAL-VOLGOGRAD, RUSSIA 2009

Electro-hydraulic system for typical slide gate of the water lock for “Volga-Don” canal, complete technical documentation for two variants of the project for driving the slide gate and for control of the movement of slide gate of the water lock have been developed. The project detailed two types of design solutions up to the level of ready documentation for development of electro hydraulic systems. The first variant is based on the use of volumetric damping control and the second variant is based on the use of pumps with constant flow whose operations are controlled through frequency converters. Within project documentation in the part relating to the calculations, the complete simulation of the dynamics of operation of electro hydraulic systems was given for both variants in the MATLAB program package.

10. DAM ” GRUŽA “, SERBIA- 2009
  
General overhaul of the hydraulic drive of conical gate NO 200 dam "Gruža" Kragujevac.
We performed repairs of hydraulic installations, as follows:
- Repair of hydraulic cylinders drive of the conical gate........................... 2 pcs.
- Repair of pipelines and related equipment on the pipeline

11. DAM “OURKISS "- ALGERIA 2010

Cylinder Ø 250/110 x 1550 mm ……………………………………………2 pcs

(With built-in stick position indicator)
Hydraulic drive unit
(Reservoir V = 250 l, two pump units Q = 10 l  min, p = 280 bar, N = 5.5 kW) ……….1 pc
Control blocks ................................................ ............................................... 2 pcs
Electric control cubicles ............................................... ..................................1 pc

The project was submitted for approval to the investor. After verification of the project the production of electro hydraulic control system for operation of safety and working gate of the foundation outlet of the dam "Ourkiss" in Algeria will begin.
Delivery, commissioning and final handover of electro-hydraulic installation was completed in 2011.

12. NAVIGATION LOCK "GORODETS", RUSSIA,  2012

• NAVAL LOCK CHAMBER  SLIDE GATES

Cylinder Ø 350/160 x 5000 mm ……………………………………………8 pcs

(with built-in rod style micro-pulse linear transducer with SSI interface)

13. NAVIGATION LOCK  “VOLGA-DON CANAL”, RUSSIA - 2012

The complete technical documentation was drafted for the electric-hydraulic drive for double gates manipulation at lower, middle and upper end of the navigation lock №№30-31 on the „Volga-Don“ canal. A project solution for motion control of the double gates was also developed as a combination volume-throttle control and frequency regulation.

The complete technical documentation was drafted for the electric-hydraulic drive for slide gates manipulation at lower, middle and upper end of the navigation lock №№30-31 on the „Volga-Don“ canal. A project solution for motion control of the slide gates was also developed as a combination volume-throttle control and frequency regulation.

14. NAVIGATION LOCK  “KRASNOGORSK” on the river IRTISH, RUSSIA - 2012

The complete technical documentation was drafted for the electric-hydraulic drive for working and spare double gates and slide gates manipulation of the Krasnogorsk navigation lock. A project solution for motion control of the slide gates was also developed based on volume-throttle control.

15. NAVIGATION LOCK  “KRASNOGORSK” on the river IRTISH, RUSSIA - 2013

• NAVAL LOCK WORKING AND SPARE DOUBLE GATES

Cylinder Ø 280/140 x 5000 mm ……………………………………………6 pcs

• NAVAL LOCK SLIDE GATES

Cylinder Ø 200/80 x 4600 mm ……..………………………………………2 pcs

(with built-in rod style micro-pulse linear transducer with SSI interface)

Hydraulic drive unit
(Reservoir V = 1300 l, two pump units Q = 210  l /min, p = 120 bar, N = 30 kW) ……………………………………………………………………………….. 4 pcs

Control blocks ................................................ ................................................ 8 pcs
Electric control cubicles ...................................................................................4 pcs

Two hydraulic drives at the lower head of the navigation lock  are designed to maneuver slide gates (filling and emptying of the navigation lock chamber), working and spare  double gates.

Two hydraulic drives at the upper head of the navigation lock  are designed to maneuver working double gates.
Design of a new electro-hydraulic control installation has been done, which facilitates easier manipulation of gallery slide gates and double gates.
The drive units and hydraulic cylinders were factory tested and delivered, as well as the control blocks, new electric cubicles and new pipe distribution system.
The equipment was delivered in September 2013.

16. WATER ACCUMULATION  “KRASNODAR”, RUSSIA - 2013

The complete technical documentation was drafted for the electric-hydraulic drive for manipulation of 10 sections of 5 double hook gates for the regulation of water level in the accumulation. A project solution for motion control of the gate sections was developed based on volume-throttle control.

The complete technical documentation was drafted for the electric-hydraulic drive for the ecological lattice which helps fish return upstream to the lake. A project solution for motion control was based on volume-throttle control.

17. NAVIGATION LOCK "№7", VOLGO-DON CANAL, RUSSIA,  2014

The complete technical documentation was drafted for two hydraulic drives used to maneuver a single gate at the upper head of the lock which enables the filling of naval lock chamber. A project solution for motion control was based on frequency regulation and volume-throttle control.

18. WATER ACCUMULATION  “KRASNODAR”, RUSSIA - 2015

• DOUBLE HOOK GATES

Hydraulic drive unit
(Reservoir V = 2200 l, two pump units Q =   41 l/min, p = 150 bar, N = 15 kW) ………………………………………………………………………………...2 pcs

Control blocks ................................................ ................................................ 20 pcs
Electric control cubicles ...................................................................................5 pcs

SSI encoder with draw wire for position measurement……………………....20 pcs

Electric-hydraulic drive for manipulation of 10 sections of 5 double hook gates for the regulation of water level in the accumulation. Each section is driven by 2 hydraulic cylinders with synchronized motion. 20 existing hydraulic cylinders were modified to accomodate encoder-type position sensor with wire rope.

• ECOLOGICAL LATTICES

Hydraulic drive unit
(Reservoir V = 1300 l, two pump units Q =   90 l/min, p = 150 bar, N = 22 kW) ………………………………………………………………………………...2 pcs

Control blocks ................................................ ................................................ 2 pcs
Electric control cubicles ...................................................................................2 pcs

SSI encoder with draw wire for position measurement…………………….....4 pcs

Two electric-hydraulic drives for the two ecological lattices which help fish return upstream to the lake. One of the drives is movable and is driven by a hydromotor which is a part of the electric-hydraulic drive. Each lattice is driven by 2 hydraulic cylinders with synchronized motion. 4 existing hydraulic cylinders were modified to accomodate encoder-type position sensor with wire rope.

The equipment was delivered in December 2015, and commissioned in December 2016.

19. NAVIGATION LOCK "№7", VOLGO-DON CANAL, RUSSIA,  2015

• NAVAL LOCK UPPER HEAD GATE

Cylinder Ø 360/200 x 8540 mm ………………………………………..……3 pcs

(with two built-in flexible micro-pulse linear position transducers with SSI interface)

Hydraulic drive unit
(Reservoir V = 2500 l, two pump units Q = (350+100)  l /min, p = 150 bar,

N = 75 kW) …………………………………………………………………...2 pc

Control blocks ................................................ ................................................ 4 pcs

Two hydraulic drives is used to maneuver a  single gate at the upper head of the lock which enables the filling of naval lock chamber. Each hydraulic drive is used to maneuver a single hydraulic cylinder. The motion of the hydraulic cylinders is synchronized. The third cylinder is a spare part.

Hydraulic cylinder motion control was based on frequency regulation and volume-throttle control.

The equipment was delivered in November 2016. The commissioning was carried out in April 2017.

20. NAVIGATION LOCK  “KRASNODAR”, RUSSIA - 2017

The complete technical documentation was drafted for two electric-hydraulic drives for manipulation of a single gate at the upper head of the lock  and for two electric-hydraulic drives for manipulation of a double sector gate and two slide gates which enable the filling and emptying of naval lock chamber at the lower head of the lock. A project solution for motion control of the gates was developed based on volume-throttle control.

A project solution for motion control was based on volume-throttle control.