Glass fiber reinforced plastic pipeline and its production process

Abstract

The invention is a glass fiber reinforced plastic pipeline, comprising outer layer and inner layer, characterized in that a filling layer is arranged between the inner and outer layers. And its producing process flow comprises: 1. the producing mould adopts inner mould and outer mould; 2. a group of glass fibers is dipped in unsaturated polyester resin and then coiled on the outer surface of the inner mould and besides, the other group of glass fibers is dipped in unsaturated polyester resin and coiled on the inner surface of the outer mould; 3. injecting the mixture of fillings and unsaturated polyester resin in the annular die formed between the two glass fiber surface layers; 4. the producing mould is heated by electrifying to cure the resin; 5. drawing out the formed pipeline by a tractor and cutting the pipeline for the needed size. And the products are strongly designable and have good synthetic performance. Besides, in the producing course, no styrene volatilizes, according with environmental protection requirements.

Description

technical field [0001] The invention belongs to the technical field of manufacturing glass fiber reinforced plastic pipes, in particular to a pultrusion-winding-injection compound molded glass fiber reinforced plastic pipe and its production process. Background technique [0002] In the municipal engineering of tunnel construction, the application of pipe jacking is more and more favored by users. Most of the pipe jacking currently used is cement pipe jacking, but there are many unfavorable factors in the cement material: cement pipe jacking does not have corrosion resistance, and if it is used in sewage treatment projects, the maintenance cost is relatively high; the surface of the cement is not smooth, which not only causes The fluid resistance during use is large, and the frictional resistance during the construction process is also relatively large, so that the requirements for the jacking work pit and jacking equipment are relatively high, so the length of each jacking ...

AI Technical Summary

Problems solved by technology

Most of the pipe jacking currently used is cement pipe jacking, but there are many unfavorable factors in the cement material: cement pipe jacking does not have corrosion resistance, and if it is used in sewage treatment projects, the maintenance cost is relatively high; the surface of the cement is not smooth, which not only causes The fluid resistance during use is large, and the frictional resistance during the construction process is also relatively large, so that the requirements for the jacking work pit and jacking equipment are relatively high, so the length of each jacking section is short, and the layout of the jacking work pit more

In addition, the ordinary FRP pipe jacking used today has the following unfavorable factors: first, the sand inclusion process adopts top or bottom addition, and the density of the sand layer is low; second, in order to increase the strength of FRP pipe jacking, the inner and outer glass Fiber method, which causes the price of FRP pipe jacking to rise; third, there is styrene volatilization in the production process, resulting in poor production environment

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