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DLT strand jacks Operating sequences

DLT strand jacks Operating sequences

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DLT strand jacks Operating sequences

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  1. DLT strand jacksOperating sequences

  2. Strand cable Safe lifting capacity 15.5 MT per strand Top anchor Hydraulic cylinder Hollow centre Bottom anchor General view of strand jack

  3. General view of bottom anchor

  4. Strand wedges Grip strand when closed Grip opening jack Grip opening Plate. Connected to grip release tubes Anchor block, with machined cones for strand wedges Cut away of bottom anchor

  5. Operation of bottom anchor - closed

  6. Operation of bottom anchor - open

  7. General view of top anchor

  8. Cut away of top anchor

  9. Operation of top anchor - closed

  10. Operation of top anchor - open

  11. STRAND JACK LOAD LIFTING SEQUENCE

  12. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 0 kN kN mm DL-P40 computer control system representation Top anchor status Green = closed Red = open Top anchor closed Closed Expected load Jack load indicator Bottom anchor status Load in bottom anchor Bottom anchor closed Closed 1 Ready for strand lifting stroke

  13. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 15 kN kN mm Closed Jack stroke indicator Closed 2 Extend ram to transfer load to top anchor

  14. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 250 kN kN mm Closed Closed 3 Strand lifting stroke

  15. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 500 kN kN mm Closed Closed 4 Top of strand lifting stroke

  16. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 480 kN kN mm Closed Closed 5 Retract ram to transfer load to bottom anchor

  17. Open top anchor

  18. Open top anchor

  19. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 480 kN kN mm Open Closed 6 Ready for ram retract stroke

  20. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 250 kN kN mm Open Closed 7 Retract stroke

  21. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 0 kN kN mm Open Closed 8 Bottom of retract stroke

  22. Close top anchor

  23. Close top anchor

  24. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 0 kN kN mm Closed Closed 9 Back Ready for next lifting cycle

  25. STRAND JACK LOAD LOWERING SEQUENCE

  26. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 0 kN kN mm Closed Closed Jack fully retracted with grips closed

  27. Open top anchor

  28. Open top anchor

  29. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 0 kN kN mm Open Closed Ready for ram extend stroke

  30. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 250 kN kN mm Open Closed Ram extend stroke

  31. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 450 kN kN mm Open Closed Top of ram extend stroke

  32. Close top anchor

  33. Close top anchor

  34. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 450 kN kN mm Closed Closed 1 Ready to transfer load to top anchor

  35. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 480 kN kN mm Closed Closed 2 Extend ram to transfer load to top anchor

  36. Open bottom anchor

  37. Open bottom anchor

  38. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 480 kN kN mm Closed Open 3 Ready for strand lowering stroke

  39. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 250 kN kN mm Closed Open 4 Strand lowering stroke

  40. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 50 kN kN mm Closed Open 5 Bottom of strand lowering stroke

  41. Close bottom anchor

  42. Close bottom anchor

  43. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 50 kN kN mm Closed Closed 6 Ready to transfer load into bottom anchor

  44. 120% 100% 0% Jack No. Load Pre-set Stroke 3 1580 1600 20 kN kN mm Closed Closed 7 Transfer load into bottom anchor

  45. Open top anchor

  46. Open top anchor

  47. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 20 kN kN mm Open Closed 8 Ready for ram extend stroke

  48. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 250 kN kN mm Open Closed 9 Ram extend stroke

  49. 120% 100% 0% Jack No. Load Pre-set Stroke 3 0 1600 450 kN kN mm Open Closed 10 Top of ram extend stroke

  50. Close top anchor