RU151454U1 - PIPELINE REPAIR COUPLING - Google Patents

Abstract

The utility model relates to pipeline transport and can be used in the repair of operating pipelines with defects, mainly crack-like, in particular, operating gas pipelines, oil pipelines. The technical result is expressed in increasing the reliability of the repaired section of the pipeline by increasing the strength of the composite material. The coupling for repairing the pipeline contains two half-shells with nozzles connected to each other along the longitudinal sections by welding or bolted joints. On the lower half-shell there are made inlet pipes, threaded holes with installation bolts. On the upper half-shell there are made exhaust pipes, threaded holes for controlling the air outlet and controlling the filling of the gap between the coupling and the pipe with composite material, threaded holes with installation bolts. The gap at the ends of the coupling is filled with mastic, and the gap between the coupling and the pipe is filled with a composite material based on nano-epoxy resin with carbon nanotubes. 1 unc P. f-ly, 3 ill.

Description

The invention relates to pipeline transport and can be used in the repair of operating pipelines with defects, mainly crack-like, in particular gas pipelines and oil pipelines. The utility model is aimed at hardening a corroded or otherwise damaged section of the pipeline without stopping the pumping of the product.

The closest analogue is a pipe repair coupling, containing upper and lower half shells, connected to each other along longitudinal sections by welding or bolt joints, with inlet pipes made on the lower half shell, with four threaded holes made in the lower half shell with installation bolts, made on the upper half shell exhaust pipes, with four threaded holes made in the upper half-shell with installation bolts, with made in the upper half-shell with top with threaded holes to control the air outlet and control the filling of the gap between the sleeve and the pipe with composite material (see, for example, RF patent No. 2191317, IPC F16L 55/18, date of publication. 20.10.2002).

The disadvantage of the closest analogue is the lack of strength of the composite material.

The technical result is expressed in increasing the reliability of the repaired section of the pipeline by increasing the strength of the composite material.

The essence of the claimed technical solution lies in the fact that it contains upper and lower half-shells, connected to each other along longitudinal sections by welding or bolt connections, with inlet pipes made on the lower half-shell, with four threaded holes made in the lower half-shell with installation bolts, made on upper half-shell with exhaust pipes, with four threaded holes made in the upper half-shell with installation bolts, with made in the upper half-shell it has threaded holes on top to control the air outlet and control the filling of the gap between the coupling and the pipe with composite material, and differs from the closest analogue in that the gap from the ends of the coupling is filled with mastic, and the gap between the coupling and the pipe is filled with composite material based on nano-epoxy resin with carbon nanotubes .

The essence of the claimed coupling for repair of the pipeline is illustrated by drawings.

In FIG. 1 is a side view of a sleeve located on a pipeline;

in FIG. 2 is a cross-sectional view of a coupling and a pipeline;

in FIG. 3 is a side view of a coupling with a bolted connection of half shells.

The coupling for repairing the pipeline contains two half-shells 1, 2, which are installed on the repaired pipeline 4, completely covering it (Fig. 1, 2, 3), Half-shells 1, 2 are interconnected along longitudinal sections by welding (Fig. 1, 2) or bolted connections (Fig. 3) On the lower half-shell 2, inlet pipes 6 are made, four threaded holes 10 with installation bolts 11. On the upper half-shell 1, exhaust pipes 7 are made, four threaded holes 10 with installation bolts 11, threaded holes 8 for controlling the air outlet and to trol filling the gap between the sleeve and the pipe 4 with a composite material 5 (Fig. 1, 2, 3). The gap at the ends of the coupling is filled with mastic. The gap between the coupling and the pipe is filled with a composite material based on nano-epoxy resin with carbon nanotubes (Fig. 1, 2, 3).

The inner diameter of the coupling exceeds the outer diameter of the pipe 4 by an amount sufficient to form an annular gap between them.

The mounting bolts 11 (Fig. 2) are designed to adjust the gap between the coupling and the pipe 4 until the ends of the coupling are filled with mastic and perform the function of supports when installing the coupling on the pipe 4.

Composite material 5 is prepared immediately before filling the volume between the pipeline 4 and the coupling in the form of a filler based on nano-epoxy resin with carbon nanotubes. An important operation for preparing a filler based on nano-epoxy resin with carbon nanotubes is the operation of mixing epoxy resin with carbon nanotubes with ultrasonic treatment using an ultrasonic dispersant (see, for example, I. Buyanov, Developing a technology for introducing carbon nanotubes into a polyester binder, glues. Adhesives. Sealants. Technologies No. 9, 2012, http://www.nait.ru/journals/number.php?p_number_id=1693). The range of optimal concentrations of carbon nanotubes in the filler lies in the range of 0.4-0.8% wt. In this case, as is well known, the best distribution of carbon nanotubes in the filler is achieved (see, for example, an article by EA Vorobyev et al. Synthesis and study of nanocomposites with the inclusion of carbon nanotubes. Http://nuclphys.sinp.msu.ru/school/ s11 / 11_25.pdf). The use of carbon nanotubes in an epoxy-based filler, for example, ED-20, increases the strength characteristics by a factor of 1.5-2.0

The composite material hardens and the bolts 11 are turned out. To obtain a smooth surface of the half shells 1, 2, the remaining bolts after cutting all the bolts can be left in the holes 8, 10 of the pipe 4 and flush cleaned.

If it is impossible to carry out fire (welding) work during the repair of the pipeline 4, steel half shells 1, 2 are performed with bolted joints 9 (Fig. 3). At the place of work, steel half shells 1, 2 of the coupling are connected to each other by the longitudinal sides of the bolted joints 9 (Fig. 3). All other actions on the coupling for repairing the pipeline are carried out similarly to the case of connecting half shells 1, 2 by welding.

The claimed coupling for repairing the pipeline due to the distinguishing feature of the new composite material - a filler in the form of a nanoepoxide with carbon nanotubes provides an increase in the strength of the composite material, increase its thermal conductivity and electrical conductivity. The increase in thermal conductivity and electrical conductivity provides equalization of the temperatures of the coupling and the pipe 4, reducing the difference in electrical potentials, which increases the strength of the repaired section of the pipeline with the coupling.

Claims (1)

A pipe repair coupling, comprising upper and lower half-shells, joined together along longitudinal sections by welding or bolt connections, with inlet pipes made on the lower half-shell, with four threaded holes made in the lower half-shell, with installation bolts, and outlet pipes made on the upper half-shell, with four threaded holes made in the upper half-shell with installation bolts, with threaded holes made in the upper half-shell on top to monitor and control the air outlet fill the gap between the sleeve and the pipe a composite material, characterized in that the ends of couplings with clearance filled with mastic and the gap between the sleeve and the pipe is filled with a composite material based on resin nanoepoksidnoy with carbon nanotubes.

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