strand lifting technology - paul · strand lifting technology. 2 ... every strand jack is supplied...

madein Germany

Maschinenfabrik GmbH & Co. KG

Strand Lifting Technology

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A 800kN strand jack series with hydraulic anchor heads


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MasMasMaschichichinennennenfabfabfabrikrikrik GmGmGmbHbHbH & C& C& Co.oo KGKGKGMaschinenfab GmbH & Co. KG

The companies DaSTec and PAUL are cooperation partners in the fi eld of lifting technology. They collaborate in the supply of system solutions and proven, top-quality products for lifting, lowering and pulling heavy loads.

DaStec develops the application solution.PAUL supplies the equipment.

Since 1955, PAUL has developed and built stressing jacks and hydraulic pump units for the manufacture of prestressed concrete products, and since 1986 has also supplied a series of strand jacks with mechanical anchor heads. The compa-ny‘s many years of experience in these fi elds and DaSTec‘s hands-on practical expertise have been channelled into the development of new, effi cient and durable products for strand lifting applications.

A new series of lifting cylinders with hydraulic anchor heads now permits the automatic movement of loads, supple-menting the existing product spectrum.

Our plant in Dürmentingen provides production space of 37,000 square metres, and accommodates the assembly, design and sales departments as well as a trainee workshop. The complete PAUL site covers an area of more than 120,000 square metres.

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Lifting cylinder

Hollow piston

Jack support chair

Strand with

load (G)

Anchor wedges of

the top and bottom

anchor head

Wedge plates of

the top and bottom

anchor head

PDM/PDH STRAND JACKS

A strand jack essentially comprises the lifting cylinder and two anchor heads (top anchor and bottom anchor). The strand cable is moved upwards or downwards by alternate-ly opening and closing of the top and bottom anchor dur-ing the lifting stroke of the hollow piston. This creates the load (G) lifting or lowering movement.

Our strand jacks are designed for strands with a diameter of 15.7 mm. An admissible force of 120 kN is allowed per strand.

We offer strand jacks with a nominal load of 200 to 6,400 kN and a lifting stroke of 500 mm. The series is designed to al-low strand jacks for different rated loads to be easily com-

bined.


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The hydraulic anchor heads open and close the anchor wedges (by pressing them into the wedge plate). This is particularly benefi cial for pulling operations in horizontal use.

Optimum strand guidance is guaranteed by hardened guide plates at the anchor heads and suspension. Telescopic strand guide tubes perform this function inside the hollow piston.

The basic equipment of the strand jack includes the follow-ing components:

Load holding valve• Connection for second strand jack• 2 electrical pressure sensors to measure pressure on the • piston and retraction sideLinear potentiometer for piston stroke• One linear potentiometer each for the wedge-seating • stroke of the anchor heads (series PDH)

PDM

-020

PD

H-0

20

PDM

-040

PD

H-0

40

PDM

-080

PD

H-0

80

PDM

-160

PD

H-1

60

PD

H-3

20

PD

H-6

40Rated load [kN] 200 400 800 1 600 3 200 6 400Piston area [cm²] 64 128 256 512 1 024 2 048Retraction area [cm²] 50 100 200 400 800 1 600Pressure [bar] 315 315 315 315 315 315Cylinder force [kN] 202 403 806 1 613 3 226 6 451Number of strands 2 4 7 15 31 61Admissible strand force [kN] 240 480 840 1 800 3 720 7 320

Strand jacks with mechanical anchor heads (series PDM) are available for rated loads of up to 1,600 kN, and with hy-draulic anchor heads (series PDH) for rated loads of up to 6,400 kN.

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Every strand jack is supplied by a hydraulic pump unit. This allows hydraulic line lengths to be kept to a mini-mum. There are three differ-ent units using pumps with different delivery capacities. The pumps also supply the hydraulic anchor heads.

PDP HYDRAULIC PUMP UNITS

PDP-

08

PDP-

16

PDP-

32

Flow rate, lifting cylinder [l/min.] 8 16 32Lifting cylinder pressure [bar] 315 315 315Flow rate, anchor assemblies [l/min.] 3 3 3Pressure, anchor assemblies [bar] 150 150 150Motor output, pump [kW] 5.5 11 22Connected loads, three phase current [V](without neutral conductor) [Hz]

40050

40050

40050

Oil tank [l] 100 100 200Lifting speed [m/h]with strand jack PD-020with strand jack PD-040with strand jack PD-080with strand jack PD-160with strand jack PD-320with strand jack PD-640(recommended application range in bold)

75.037.518.89.44.72.3

150.075.037.518.89.44.7

300.0150.075.537.518.89.4


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Standard equipment:

Return-fl ow fi lter with clogged fi lter indicator light at • the control systemOil level display at the oil tank (fi lling quantity and • temperature)Electrical cabinet with interface for the bus system and • connection with manual control system

Optional equipment:

Electrical oil level display• Electrical oil temperature display• Oil tank heating• Oil tank cooling• Frequency converter for stepless fl ow rate•

As the standard confi guration for an equipment outfi t, we recommend the following items:

4 strand jacks• 4 transport cases• 4 hydraulic pump units• 4 fi xed anchors• 1 control system• 1 bus cable (data cable)• 4 sets of hoses 5 m (optionally 10 m) with data • and control cable for strand jack4 strand guides• 1 uncoiling reel for strands•

The confi guration is adjusted individually to cus-tomer requirements. The control system and ac-cessories are described on the following pages.

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Operation of the strand jacks takes place centrally with the aid of a user-friendly control system. It visualizes up to 16 strand jacks on a display, so guaranteeing full control of the hydraulic pressure, piston stroke and anchor assembly status (open/closed). If required, the display can be supplemented by additional strand jacks. The central control system is con-nected by means of a bus cable to the individual hydraulic pump units and processes signals in real time.

CONTROL SYSTEM

The following operating modes are supported by the con-trol system:

Set-up mode and pre-load stroke• Automatic lifting and lowering mode• Manual mode for corrections•

The control system monitors the lifting or lowering mode. It is possible to select between pressure and path monitoring. If the prescribed limiting values are exceeded, the operator is warned and, if necessary, the current process is stopped in order to carry out the necessary corrections. In the auto-

matic mode, the control system regulates the stroke and pressure automatically.

Typ PDH-080 PDH-080 PDH-080 PDH-040 PDH-040 --- --- ---

Stroke [mm] 40 38 41 39 40 --- --- ---

Load [kN] 642 618 712 283 292 --- --- ---

Lift [mm] 20 18 21 19 20 --- --- ---

Total Lift [mm] 15 250 15 252 15 249 15 251 15 252 --- --- ---

Typ --- --- --- --- --- --- --- ---

Stroke [mm] --- --- --- --- --- --- --- ---

Load [kN] --- --- --- --- --- --- --- ---

Lift [mm] --- --- --- --- --- --- --- ---

Total Lift [mm] --- --- --- --- --- --- --- ---

Total Load [kN]

2 547

STARTSTART

MENUEMENUE


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ACCESSORIES

We supply a series of accessories in order to simplify hand-ling of the lifting equipment and the strands:

Transport cases• Strand guides• Hose packages• Uncoiling reels for strands• Strand dispensers• Anchors for fi xed side• and many more•

10Salzburg Airport, Austria, 2012 [Source: Gleitbau Salzburg]

Kwang Yang Bridge, South Korea, 2009/2010[Source: Gleitbau Salzburg]

APPLICATION FIELDS


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Steel platforms in Jeddah, Saudi Arabia, 2007 [Source: Gleitbau Salzburg]

Bridge Selo, Croatia, 1997[Source: Citra, France]

Heavy Lifting, Czech Republic, 1995 [Source: Frutiger, Switzerland]

PAU

L-In

fo B

143

.81/

113

03

Max-Paul-Straße 1 88525 DürmentingenGermany

Phone: +49 (0) 73 71 / 500 - 0Fax : +49 (0) 73 71 / 500 - 111E-Mail: [email protected]: dastec.paul.eu


Riefershäusern 31 3415 Hasle bei BurgdorfSwitzerland

Phone: +41 (0) 34 / 445 68 63

E-Mail: [email protected]: www.dastec.ch

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strand lifting technology - paul · strand lifting technology. 2 ... every strand jack is supplied...

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