阅读说明：本技术 一种玻璃钢管道的制备方法 (Preparation method of glass fiber reinforced plastic pipeline ) 是由 宁瑞峰 孙宝友 孟臣 温玉龙 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种玻璃钢管道的制备方法,包括以下步骤：对芯模表面进行清理、在聚酯薄膜表面喷涂耐磨胶衣、制备内衬层、制备内缠绕层、制备夹砂层、制备外缠绕层、固化修整,本发明涉及玻璃钢管道制备技术领域,本发明通过芯模上添加聚脂薄膜以及耐磨胶衣,避免内衬层与芯模直接接触,便于后期脱模；通过压辊压覆将涂覆过程中产生的气泡消除,保证内衬层的均匀完整性,配置缠绕层树脂,向环氧树脂内加入过氧化甲乙酮以及苄基三乙基氯化铵,通过各组分之间的协同作用提高产品性能,管道外侧涂装聚氨酯涂层,可进一步提高管道防水防腐性能,提高管道整体使用寿命,给人们的实用带来了方便。(The invention discloses a preparation method of a glass fiber reinforced plastic pipeline, which comprises the following steps: the invention relates to the technical field of glass steel pipeline preparation, and the method comprises the following steps of cleaning the surface of a core mold, spraying wear-resistant gel coat on the surface of a polyester film, preparing an inner liner layer, preparing an inner winding layer, preparing a sand inclusion layer, preparing an outer winding layer, and curing and finishing; pressing through the compression roller and covering the bubble that produces in with the coating process and eliminating, guarantee the even integrality of inner liner, configuration winding layer resin adds methyl ethyl ketone peroxide and benzyl triethyl ammonium chloride in to epoxy, improves product performance through the synergism between each component, pipeline outside application polyurethane coating can further improve the waterproof corrosion resistance of pipeline, improves the whole life of pipeline, and the practicality of giving people has brought the convenience.)

1. The preparation method of the glass fiber reinforced plastic pipeline is characterized by comprising the following steps:

s1, cleaning the surface of the core mold to ensure that the surface of the core mold is smooth and free of impurities, and coating a polyester film on the surface of the core mold after cleaning;

s2, spraying wear-resistant gel coat on the surface of the polyester film;

s3, preparing an inner liner: winding a layer of glass fiber surface felt on the outer side of the wear-resistant gel coat, simultaneously uniformly coating lining resin on the core mold, winding a layer of glass fiber surface felt, uniformly coating the lining resin again, winding gridding cloth, and curing after heating;

s4, preparing an inner winding layer: preparing winding layer resin, immersing the untwisted roving into the winding layer resin, and winding the untwisted roving to the outer side of the lining layer;

s5, preparing a sand inclusion layer: mixing quartz sand and resin in proportion to form mortar, winding the mortar to the surface of the inner winding layer through a sand inclusion cloth, and then performing rolling operation;

s6, preparing an outer winding layer: immersing the twistless roving into the winding layer resin and then winding the twistless roving to the outer side of the sand inclusion layer;

s7, curing and finishing: and (4) heating and curing the pipeline obtained in the step (6), and finishing the pipeline port after curing to obtain the glass fiber reinforced plastic pipeline.

2. The method for preparing a FRP pipeline as claimed in claim 1 wherein the winding layer resin is prepared by adding methyl ethyl ketone peroxide and benzyltriethylammonium chloride to epoxy resin in sequence and stirring to obtain the winding layer resin.

3. The method for preparing the glass fiber reinforced plastic pipeline according to claim 2, wherein the dosage of the methyl ethyl ketone peroxide is 1-3% of the weight of the epoxy resin, and the dosage of the benzyltriethylammonium chloride is 1-2% of the weight of the epoxy resin.

4. The method for preparing a glass reinforced plastic pipeline according to claim 2, wherein the outer wall of the glass reinforced plastic pipeline after being corrected in the step S7 is coated with polyurethane paint.

5. The method of claim 1, wherein the lining resin is applied in step S3 such that the lining resin is impregnated into the entire surface of the core mold without coating leakage.

6. The method of claim 1, wherein a press roller is disposed at one side of the core mold for covering to eliminate bubbles generated in the resin during the winding and coating process when winding the fiber glass surfacing mat, the mesh fabric and the roving.

7. The method of claim 1, wherein the winding manner in steps S4 and S6 is hoop winding or cross winding.

8. The method of claim 1, wherein in step S3, the mesh cloth has a tensile strength of > 2.5kg/cm and a mesh diameter of 0.5-1.0 mm.

9. The method as claimed in claim 1, wherein the curing heating in step S7 is performed by far infrared heating.

10. The method for preparing a FRP pipe as claimed in claim 1 wherein in step S3, the content of lining resin in the fiberglass surfacing mat is 90-95%.

Technical Field

The invention relates to the technical field of glass fiber reinforced plastic pipeline preparation, in particular to a preparation method of a glass fiber reinforced plastic pipeline.

Background

The glass fiber reinforced plastic pipeline is a light, high-strength and corrosion-resistant nonmetal pipeline. The glass fiber with resin matrix weight is wound on a rotating core mold layer by layer according to the technological requirement, and quartz sand is uniformly paved among the fibers at a long distance to serve as a sand inclusion layer. The pipe wall structure is reasonable and advanced, the function of materials can be fully exerted, the rigidity is improved on the premise of meeting the use strength, and the stability and the reliability of the product are ensured. The glass fiber reinforced plastic sand inclusion pipe has the advantages of excellent chemical corrosion resistance, light weight, high strength, no scale formation, strong shock resistance, long service life compared with the common steel pipe, low comprehensive cost, quick installation, safety, reliability and the like, and is accepted by the majority of users.

The glass fiber reinforced plastic pipeline is applied to the industries of petroleum, chemical engineering, drainage and the like. The production development of the glass fiber reinforced plastic pipeline in China is fast, the quantity is long year by year, and the application range and departments are wider and wider, so the demand of the glass fiber reinforced plastic pipeline is increased day by day.

Chinese patent CN107225784A discloses a process for producing glass fiber reinforced plastic pipeline, comprising the following steps: a) the preparation process of the glass fiber reinforced plastic inner liner comprises the following steps: adding a layer of wear-resistant gel coat during the lining manufacture, and particularly spraying the wear-resistant gel coat on the surface of the core mold; b) a winding process: after the lining layer is solidified, soaking the lining layer into a resin groove to soak urea-formaldehyde resin;

the process can be used for preparing the glass fiber reinforced plastic pipeline, but the process flow is simple, the prepared glass fiber reinforced plastic pipeline has the defects of insufficient strength, material waste, low efficiency and the like, and therefore a new production process is urgently needed to be developed to meet the production requirements of people.

Disclosure of Invention

The invention aims to provide a preparation method of a glass fiber reinforced plastic pipeline, and mainly aims to solve the problem of poor production effect of the existing process.

The technical scheme of the invention is that the preparation method of the glass fiber reinforced plastic pipeline comprises the following steps:

s1, cleaning the surface of the core mold to ensure that the surface of the core mold is smooth and free of impurities, and coating a polyester film on the surface of the core mold after cleaning;

s2, spraying wear-resistant gel coat on the surface of the polyester film;

s3, preparing an inner liner: winding a layer of glass fiber surface felt on the outer side of the wear-resistant gel coat, simultaneously uniformly coating lining resin on the core mold, winding a layer of glass fiber surface felt, uniformly coating the lining resin again, winding gridding cloth, and curing after heating;

s4, preparing an inner winding layer: preparing winding layer resin, immersing the untwisted roving into the winding layer resin, and winding the untwisted roving to the outer side of the lining layer;

s5, preparing a sand inclusion layer: mixing quartz sand and resin in proportion to form mortar, winding the mortar to the surface of the inner winding layer through a sand inclusion cloth, and then performing rolling operation;

s6, preparing an outer winding layer: immersing the twistless roving into the winding layer resin and then winding the twistless roving to the outer side of the sand inclusion layer;

s7, curing and finishing: and (4) heating and curing the pipeline obtained in the step (6), and finishing the pipeline port after curing to obtain the glass fiber reinforced plastic pipeline.

Preferably, the preparation method of the winding layer resin comprises the steps of sequentially adding methyl ethyl ketone peroxide and benzyl triethyl ammonium chloride into the epoxy resin, and then stirring to obtain the winding layer resin.

Preferably, the dosage of the methyl ethyl ketone peroxide is 1-3% of the weight of the epoxy resin, and the dosage of the benzyltriethylammonium chloride is 1-2% of the weight of the epoxy resin.

Preferably, the outer wall of the glass pipeline after the correction in step S7 is coated with a polyurethane paint.

Preferably, when the lining resin is applied in step S3, the lining resin is allowed to permeate the entire surface of the core mold without causing coating leakage.

Preferably, when winding the glass fiber surface felt, the gridding cloth and the twistless roving, a press roller is arranged at one side of the core mould to perform pressing and covering work, so that bubbles generated in the resin in the winding and coating process are eliminated.

Preferably, in steps S4 and S6, the winding method is hoop winding or cross winding.

Preferably, in step S3, the tensile strength of the mesh cloth is more than 2.5kg/cm, and the mesh diameter is 0.5-1.0 mm.

Preferably, the curing heating in step S7 is performed by far infrared heating.

Preferably, in the step S3, the content of the lining resin in the glass fiber surface felt is 90-95%.

The invention has the beneficial effects that:

1. according to the invention, the polyester film and the wear-resistant gel coat are added on the core mold, so that the inner liner is prevented from being directly contacted with the core mold, and the later-stage demolding is facilitated;

2. the outer side of the inner liner is coated with the mesh cloth, and air bubbles generated in the coating process are eliminated through press covering of the compression roller, so that the uniform integrity of the inner liner is ensured, and the pipeline strength is improved;

3. preparing winding layer resin, adding methyl ethyl ketone peroxide and benzyltriethylammonium chloride into epoxy resin, and improving the product performance through the synergistic effect of the components;

4. the polyurethane coating is coated on the outer side of the pipeline, so that the waterproof and anti-corrosion performance of the pipeline can be further improved, the overall service life of the pipeline is prolonged, and convenience is brought to people in practicability.

Detailed Description

The present invention will be further described with reference to the following examples.

A preparation method of a glass fiber reinforced plastic pipeline comprises the following steps:

s1, cleaning the surface of the core mold to ensure that the surface of the core mold is smooth and free of impurities, and coating a polyester film with the thickness of 25-35 mu m on the surface of the core mold after cleaning;

s2, spraying wear-resistant gel coat on the surface of the polyester film;

s3, preparing an inner liner: winding a layer of glass fiber surface felt on the outer side of the wear-resistant gel coat, simultaneously uniformly coating lining resin on the core mold, winding a layer of glass fiber surface felt, uniformly coating the lining resin again, enabling the lining resin to permeate the whole core mold surface without missing coating when the lining resin is coated, enabling the content of the lining resin in the glass fiber surface felt to be 90-95%, then winding gridding cloth, enabling the tensile strength of the gridding cloth to be more than 2.5kg/cm, enabling the diameter of a mesh to be 0.5-1.0 mm, and curing after heating;

s4, preparing an inner winding layer: the method comprises the steps of preparing a winding layer resin, wherein the winding layer resin is prepared by sequentially adding methyl ethyl ketone peroxide and benzyl triethyl ammonium chloride into epoxy resin and then stirring to obtain the winding layer resin, wherein the methyl ethyl ketone peroxide is used as a curing agent, the benzyl triethyl ammonium chloride is used as an accelerating agent, the dosage of the methyl ethyl ketone peroxide is 1-3% of the weight of the epoxy resin, the dosage of the benzyl triethyl ammonium chloride is 1-2% of the weight of the epoxy resin, twistless roving is immersed into the winding layer resin and then wound to the outer side of an inner liner, and the winding mode is annular winding or cross winding;

s5, preparing a sand inclusion layer: mixing quartz sand and resin in proportion to form mortar, winding the mortar to the surface of the inner winding layer through a sand inclusion cloth, and then performing rolling operation;

s6, preparing an outer winding layer: immersing the untwisted roving into the winding layer resin and then winding the untwisted roving to the outer side of the sand inclusion layer, wherein the winding mode is circumferential winding or cross winding, and when the glass fiber surface felt, the gridding cloth and the untwisted roving are wound, a press roll is required to be arranged at one side of the core mould for pressing and covering work, so that bubbles generated in the resin in the winding and coating process are eliminated;

s7, curing and finishing: and (4) heating and curing the pipeline obtained in the step (6) by adopting far infrared rays, finishing the pipeline port after curing to obtain the glass fiber reinforced plastic pipeline, and coating polyurethane paint on the outer wall of the glass fiber reinforced plastic pipeline after finishing correction.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.