Device and method for preparing composite material used for field pipeline enhancement

Abstract

The invention discloses a device and method for preparing a composite material used for field pipeline enhancement. The device comprises a temperature-control stirring unit, an enhanced fiber cloth wetting unit and a vacuum unit, wherein the temperature-control stirring unit, the enhanced fiber cloth wetting unit and the vacuum unit sequentially communicate with one another. The enhanced fiber cloth wetting unit is composed of a reel, a vacuum bag film, enhanced fiber cloth and a guiding net, wherein the reel, the enhanced fiber cloth and the guiding net are sleeved with the vacuum bag film. The outer wall of an inner connector and the outer side faces of baffles are both covered with drainage nets, and the draining nets covering the outer side faces of the baffles extend into glue storage grids of the baffles from the edges of the baffles. Compared with the prior art, vacuum guiding-in of multiple layers of rolls is achieved in a non-mold mode, and by combining the advantages of enhanced fiber composite material pre-molding, vacuum guiding-in molding and manual pasting molding, the mechanical property of the manufactured finished composite material is improved by 1.5 times, and construction efficiency is improved by 2 times.

Description

technical field [0001] The invention relates to the field of oil and gas pipeline defect repair, in particular to a composite material preparation device and preparation method for on-site pipeline reinforcement. Background technique [0002] Dimensional reinforced composite materials are widely used in various fields due to their small specific gravity, high specific strength and high specific modulus. Currently, the commonly used preparation methods include: hand lay-up, compression molding, vacuum introduction, and pultrusion. . At present, composite materials are also being gradually applied to the repair of defects in oil and gas pipelines. Compression molding and vacuum introduction molding methods can ensure the infiltration of resin and reinforcing fibers, and at the same time maximize the proportion of reinforcing fibers. The finished products have excellent performance. However, due to the need for special Equipment and molds need to be made, so the efficiency of ...

AI Technical Summary

Problems solved by technology

Preforming is to prefabricate the composite coil in the factory by pultrusion according to the diameter of the pipe, and then wrap it around the defect of the pipe for repair. This method can obtain stable performance due to prefabrication in the factory, but due to the hardness of the composite coil itself Larger, it is difficult to ensure the complete fit between the coil and the pipe when it is installed on the pipe, especially when there are irregularities such as pipe welds and pipe diameter deformation, it is easy to produce hollowing, which will cause a large loss of repair effect Even stop failure; hand lay-up refers to wind the dry reinforcing fiber material at the repair site, paint resin at the same time, and make repair composite materials on site, but it is greatly affected by uncontrollable factors such as man-made or environment, such as resin viscosity is too high at low temperature If the fiber cloth is not saturated, the amount of impregnation is uneven, the environmental humidity and wind and sand will cause the performance loss of the composite material, thus affecting the repair effect

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