Method for preparing coalbed gas pipeline by adopting double-angle alternating winding technology

Abstract

The invention discloses a method for preparing a coalbed gas pipeline by adopting a double-angle alternating winding technology. The method comprises the following steps: designing parameters; preparing a resin glue solution; processing a mold; alternately winding and molding; carrying out segmented heating curing; demolding and driving a piton; and fabricating threads. The method is reasonable in design of a whole process, and strong in maneuverability, and can be applied to production of coalbed gas pipelines with different sizes and strength requirements; and the prepared pipeline is excellent in quality. According to the angle alternating winding technology for large-angle and small-angle winding, the tensile strength of the pipeline in the axial direction can be effectively increased by small-angle winding; the defects of circumferential strength can be compensated by large-angle winding, thus the circumferential strength and the failure strength are not greatly weakened when the axial strength of the pipeline is increased; the operating requirements of the coalbed gas pipeline are achieved under the condition that the thickness of the wall is not greatly increased; the production cost is relatively low; the production efficiency is relatively high; and a plurality of defects of the prior art can be overcome.

Description

technical field [0001] The patent of the present invention relates to a method for preparing a composite material gas bed pipeline, in particular to a method for manufacturing a coal bed gas pipeline with high axial tensile strength through glass fiber reinforced epoxy resin technology. Background technique [0002] Due to its excellent corrosion resistance, fatigue resistance, longer service life, light weight and low installation cost, epoxy pipes are widely used in petrochemical, urban water supply and drainage, hot spring pipelines and other fields. [0003] Most of the pipelines in the above-mentioned fields are used in a tiled manner, but in the gas layer pipeline project, due to the particularity of the use environment, the pipeline needs to work vertically, so it is necessary to meet the failure pressure and have better performance. Axial tensile strength. The ordinary epoxy pipeline produced by the existing technology cannot meet the requirements of the axial tensi...

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Problems solved by technology

The ordinary epoxy pipeline produced by the existing technology cannot meet the requirements of the axial tensile strength of the coalbed methane pipeline without greatly increasing the wall thickness. The strength of the fiber is mainly concentrated in the hoop direction, but the strength of the fiber cannot be well reflected in the axial direction

Therefore, if you continue to use ordinary epoxy pipes to replace steel pipes as gas bed pipes, you must greatly increase the thickness of the pipes to ensure that they have sufficient axial tensile strength, but this will increase the cost of the product and further affect production Efficiency, transportation cost, installation cost, there are big deficiencies

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