TENSIONING DEVICE FOR PRE-STRESSING AN ASSEMBLY WITH A THREADED ROD

摘要

The invention provides a tensioning device having a traction element and a body. The traction element includes a first lower portion of the traction element that resides in a tie-rod that is able to interlock with a threaded rod and a second upper portion of traction element that resides in a piston, the first and second portions of traction element being integral in displacement. The traction element is axially moveable in a bore of the body and co-axially mounted around the traction element, the body providing a first lower portion of the body that resides in a tubular support sleeve and a second upper portion of body that resides in a cylinder. An annular chamber is formed between the traction element and the body and intended to receive a pressurized fluid.

主权项

1. A tensioning device comprising:
a traction element, and a body, wherein
(a) the traction element provides a first lower portion of traction element that includes a tie-rod able to interlock with a threaded rod, and a second upper portion of traction element that includes a piston, the first portion and the second portion of traction element being integral in displacement;(b) the traction element is axially movable in a bore of body mounted co-axially around the traction element, a first lower portion of body that includes a support tubular sleeve, and a second upper portion of body that includes a cylinder; and(c) an annular chamber is formed between the traction element and the body and intended to receive a pressurized fluid;(d) the annular chamber is formed axially between the second portion of traction element and the second portion of body, and radially between the second portion of body and the first portion of traction element; and wherein(e) the device provides first sealing means mounted radially between the second portion of body and the first portion of traction element, and second sealing means mounted radially between the second portion of body and the second portion of traction element, the two sealing means being positioned axially on either side of the annular chamber to ensure its sealing.