CS244954B1 - Apparatus for reparation of demaged pipings - Google Patents

Description

The invention relates to a device for repairing a damaged pipe without interrupting the pipe operation.

The prior art repair of the damaged pipeline was carried out during the shutdown of the pipeline and the interrupted delivery of the conveyed medium in such a way that repairs were made by sealing with drill bands or other hoops. This method is unsatisfactory mainly due to the low tightening force of the screws, so that after a short time the seal or leakage of the transported medium into the environment is leaking. In the place of such repair, insulation had to be damaged all around the pipe. The recovery of the original quality insulation could not be achieved and each repaired site was a source of corrosion. Pipeline repairs at shutdown mean interruption of supply and transport of media. This demanding method of repair, in particular, causes large losses, especially for long-distance pipelines (discharge of piping - repair - filling). In addition to this, there are further subsequent losses for all customers. Even with good work organization, such a repair is time-consuming and costly. A partial advantage of this method of repair was the quality of the weld of the damaged pipeline, with the outer insulation being damaged only to the extent necessary.

The above-mentioned disadvantages are eliminated by the device according to the invention, which is based on the fact that a metal plate with a rubber seal is attached to the rotating seat located on the pressure screw for fixing to the pipeline to be repaired.

Carrying out the repair of the boreholes according to the invention during operation eliminates the disadvantages of the methods used hitherto. The device is simple, easy to use and completely reliable. The simple design of the machine allows its manufacture in any metalworking workshop. Once the damaged or spot on the pipe has been smoothed out, the external insulation of the pipe at the location of future welding of the screws and the metal plate is removed.

The metal plates welded to the pipeline are made of a material of the same quality and profile as the pipeline to be repaired to achieve a perfect fit and weld quality. The device itself fulfills the function of plate pressing and sealing of the leaking medium as well as safety of the fuse during welding. An example of an embodiment of a damaged pipe repair device is shown in the drawing.

After cleaning the insulation, the fixing devices 5 are welded to the respective pipe failure point and the device is assembled by sliding the fixing arms 2 with the guide nut 3 onto the fixing screws 5 and tightening the fixing nuts 6. A metal plate 8 is placed on the damaged pipe. on which a rubber gasket 9 is attached at the bottom so as to cover the outer edges of the hole in the duct. By turning the tightening lever 4, the metal plate 8 with the rubber seal 9 is pressed against the pipe 10 to be repaired by the pressure screw 1 with the swivel seat 7 until the leakage of the medium from the damaged place on the pipe stops. The metal plate 8 with the rubber seal 9 thus pressed is welded to the pipe 10. After welding the metal plate 8 to the damaged pipe 10, the device is dismantled. The welded fastening screws 5 are detonated from the damaged pipe 10 and the insulation is restored. The rubber gasket 9, which served in the first repair phase to reduce leakage media after completion of the task, remains permanently under the metal plate 8. Another possible alternative to attaching the device of the invention to a damaged pipeline is fastening with tightening strips tightened with screws (instead of welded fastening screws 5). ).

The device according to the invention can be used in the repair of pipelines by which it is possible. non-flammable and non-explosive media (water, steam, etc.) are leaking without decommissioning repaired pipes.

Claims (1)

Damaged pipe repairing equipment, in particular for the transport of water and steam, by full-pressure inversion consisting of a clamping screw which is guided by a guide nut and a tensioning lever, fastening arms are fastened to the guide nut, which are fastened by fixing screws and fixing nuts or by means of tightening belts tightened with pipe screws, characterized in that a metal plate (8) with a rubber seal (9J) is attached to the rotatable seat (7) located on the pressure screw (1j) for attachment to the pipe (10) to be repaired.