Method and system for outer-layer integrated molding of glass fiber reinforced plastic double-wall tank

Abstract

The invention discloses a method and a system for an outer-layer integrated molding of glass fiber reinforced plastic double-wall tank. The method includes: evenly and sequentially paving glass fibers and a flow-guiding mesh layer on the outer side of a manufactured glass fiber reinforced plastic inner-wall tank; evenly arranging resin guide-in pipelines communicated with a resin tank on the paved flow-guiding mesh layer; using a vacuum bag to wrap a glass fiber reinforced plastic tank and the resin guide-in pipelines and vacuuming the vacuum bag and the glass fibers; opening up each resin-importing pipeline by segments to enable resin to be discharged from the resin guide-in pipelines and evenly guided into the paved glass fibers along the flow-guiding mesh layer; waiting for solidification and molding of the resin to obtain an outer wall of the glass fiber reinforced plastic double-wall tank. By the method, molding and producing costs are significantly reduced under the condition that surface quality of double-wall tank products are not affected, direct damage of spray coating to human beings and environment is significantly reduced and molding efficiency of the outer wall of the glass fiber reinforced plastic tank is improved.

Description

technical field [0001] The invention relates to the technical field of forming FRP double-walled tanks, and more specifically relates to a method and system for integrally forming the outer layer of a FRP double-walled tank, mainly for the production of double-walled tanks whose inner and outer layers are made of FRP. Background technique [0002] Gas stations are scattered all over our country now, and there are more than 100,000 in mainland China. PetroChina (18,000) and Sinopec (30,000) dominate the gas station market. [0003] The United States, the only "superpower" in the world today, has 174,000 gas stations, ranking first in the world. According to reports in the United States, the pollution of drinking water from the leakage of underground oil tanks will become a worldwide environmental crisis within a few years, and the treatment and restoration of contaminated soil is very difficult. As of September 2010, more than 420,000 underground oil tanks in the United Sta...

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Problems solved by technology

[0004] At present, for large-scale double-walled tanks, the molding of its outer layer mainly adopts spraying molding method, such as the reinforced plastic lined double-walled tanks disclosed in patent documents CN 1706627 and CN 1709773, which are all made by spraying molding method, for large double-walled tanks The outer layer of glass fiber reinforced plastics is made by spraying resin on the wall tank (the tank diameter exceeds 2m), and its surface quality is prone to bubbles or voids, which affects the quality of the finished product, and has a greater impact on people and the environment after spraying

In addition, for large double-wall tanks, the cost of RTM compression molding is relatively high, and it is not easy to form.

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