Device to repair leakage in high pressure shell-and-tubes heat exchanger using gasket and tensioning by cases
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsElbert Fernando Martins Coelho, Wagner Henrique Saldanha
Life of this patent
Estimating the term…
Abstract
The present invention refers to a device to repair leakage in high pressure shell-and-tube heat exchanger using gasket and tensioning by cases. The device aims to repair leakages in heat exchangers in flanged connections of large diameter where there is the gap or channel to allow for gasket placement. The device is fully screwed, with no risk of flash during its implantation and can be used at high temperatures and pressure, in addition to presenting an ease of manufacture/assembly, reducing implementation costs. Basically, the device comprises an adjustment screw holder, gasket compression ring, stabilizer support, and compression adjustment screws.
Claims17
A device to repair leakages in high pressure shell-and-tube heat exchangers, the device comprising:
- at least one adjustment screw holder with two symmetrical parts in the shape of a semicircle, wherein each symmetrical part comprises two joining elements at their respective ends;
- at least one gasket compression ring comprising a set of smooth plates with a plurality of blind holes, wherein each blind hole is specially adapted to receive an end of a gasket compression adjustment screw;
- at least one stabilizing support, having a “T” shape and comprising a cylindrical bar, a threaded bar, and hexagonal nuts;
- and
- at least one gasket compression adjustment screw, comprising a hexagonal nut and a screw body corresponding to a threaded bar.
A method of assembling a device to repair leakages in high pressure shell-and-tube heat exchangers, the method comprising:
- installing a gasket in a heat exchanger gap;
- positioning a gasket compression ring on the gasket, wherein the gasket compression ring comprises a set of smooth plates with a plurality of blind holes, wherein each blind hole is specially adapted to receive an end of a gasket compression adjustment screw;
- subsequently fixing a screws adjustment holder, wherein the screws adjustment holder comprises two symmetrical parts in the shape of a semicircle, wherein each symmetrical part comprises two joining elements at their respective ends;
- and
- installing the gasket adjustment compression screw to symmetrically adjust the gasket compression ring, the gasket adjustment compression screw comprising a hexagonal nut and a screw body corresponding to a threaded bar.
Dependencies are inferred from the claim text.