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CN-121977115-A - Corrosion-resistant glass fiber reinforced plastic gas pipeline and preparation method thereof

CN121977115ACN 121977115 ACN121977115 ACN 121977115ACN-121977115-A

Abstract

The invention discloses an anti-corrosion glass fiber reinforced plastic gas pipeline and a preparation method thereof, which relate to the technical field of gas pipelines, and comprise a straight pipe main body, wherein both ends of the straight pipe main body are respectively provided with a closed flange module, the straight pipe main body is detachably provided with an elbow joint module through the closed flange module, the elbow joint module is also provided with an anti-freezing module, the straight pipe main body and the elbow pipe main body are sequentially provided with a lining anti-corrosion layer, a steel inner core pipe, a glass fiber reinforced plastic reinforcing layer and an outer protective layer from inside to outside, the glass fiber reinforced plastic reinforcing layer is made of glass fiber reinforced plastic, and the glass fiber reinforced plastic reinforcing layer is coated on the outer sides of the straight pipe main body and the bent pipe main body through a cross winding process and a heat curing process, and when the glass fiber reinforced plastic pipe is used, the four layers of composite structures of the inner lining anti-corrosion layer, the steel inner core pipe, the glass fiber reinforced plastic reinforcing layer and the outer protective layer are adopted to act cooperatively, and the adopted cross winding and heat curing process coated glass fiber reinforced plastic reinforcing layer improves the structural strength and the corrosion resistance, so that compared with a traditional single metal pipeline, metal corrosion and material aging are effectively prevented.

Inventors

  • SHAN PEILI

Assignees

  • 广东亿丰轩科技有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (9)

  1. 1. The anti-corrosion glass fiber reinforced plastic gas pipeline is characterized by comprising a straight pipe main body (1), wherein both ends of the straight pipe main body (1) are respectively provided with a closed flange module (2), the closed flange modules (2) are distributed along the axial direction of the straight pipe main body (1), two ends of the straight pipe main body (1) are detachably provided with an elbow joint module (3) through the closed flange modules (2), the straight pipe main body (1) is communicated with an elbow main body (4) through the elbow joint module (3), and an anti-freezing module (5) for reducing the heat conduction efficiency of the elbow main body (4) is further arranged in the elbow joint module (3); The novel glass fiber reinforced plastic pipe comprises a straight pipe main body (1) and an elbow main body (4), wherein the straight pipe main body (1) and the elbow main body (4) are made of the same material, a lining anti-corrosion layer (6), a steel inner core pipe (7), a glass fiber reinforced plastic reinforcing layer (8) and an outer protective layer (9) are sequentially arranged from inside to outside, the glass fiber reinforced plastic reinforcing layer (8) is made of glass fiber reinforced plastic, and the glass fiber reinforced plastic reinforcing layer (8) is coated on the outer sides of the straight pipe main body (1) and the elbow main body (4) through a cross winding process and a heat curing process.
  2. 2. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 1, wherein the elbow joint module (3) comprises an anti-freezing joint body (31) detachably connected with the straight pipe body (1), one end of the anti-freezing joint body (31) extending into the straight pipe body (1) is provided with a straight pipe threaded end (32) connected with the straight pipe body (1) in a threaded fit manner, and one end of the anti-freezing joint body (31) close to the straight pipe threaded end (32) is tightly attached to the sealing gasket (211).
  3. 3. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 2, wherein a filling cavity (311) for filling an anti-freezing medium is formed in the anti-freezing joint main body (31), a pouring port (3111) communicated with the filling cavity (311) is formed in the anti-freezing joint main body (31), and the bent pipe main body (4) penetrates through one end of the filling cavity (311) and extends out of the straight pipe threaded end (32); the one end that straight tube screw thread end (32) was kept away from to anti-freezing joint main part (31) is equipped with and overhauls screw thread end (33) that link to each other with return bend main part (4) screw thread fit, and return bend main part (4) dismantles through overhauling screw thread end (33) and installs in anti-freezing joint main part (31).
  4. 4. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 1, wherein the sealing flange module (2) comprises straight pipe flanges (21) fixedly installed at two ends of the straight pipe main body (1), and one end of each straight pipe flange (21) far away from the straight pipe main body (1) is further provided with a sealing gasket (211) in an embedded mode.
  5. 5. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 4, wherein the sealing flange module (2) further comprises a joint flange plate (22) fixedly installed on the outer side of the anti-freezing joint main body (31), the straight pipe flange plate (21) and the joint flange plate (22) are connected through bolt fastening, and the sealing gasket (211) is used for filling a gap between the straight pipe flange plate (21) and the joint flange plate (22).
  6. 6. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 1, wherein the anti-freezing module (5) comprises a first check ring (51) and a second check ring (52) which are sleeved outside the pipe bending main body (4) and are in clearance fit with the filling cavity (311), a spiral supporting unit (53) is sleeved between the first check ring (51) and the second check ring (52) and is positioned outside the pipe bending main body (4), and the spiral supporting unit (53) is used for dispersing load between the anti-freezing joint main body (31) and the pipe bending main body (4); Still fixed mounting has race (511) in first retaining ring (51), just return bend main part (4) are connected in anti-freezing joint main part (31) through race (511) rotation, the one end that first retaining ring (51) was kept away from to second retaining ring (52) and maintenance screw thread end (33) are located the one end butt that anti-freezing joint main part (31) and link to each other.
  7. 7. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 1, wherein the lining anti-corrosion layer (6) is a medium corrosion resistant coating or lining pipe for isolating the corrosive medium from direct contact with the steel inner core pipe (7).
  8. 8. The anti-corrosion glass fiber reinforced plastic gas pipeline according to claim 1, wherein the outer protective layer (9) consists of a resin-rich outer layer and a color paste identification layer and is used for blocking ultraviolet rays from directly irradiating the steel inner core pipe (7).
  9. 9. The preparation method of the anti-corrosion glass fiber reinforced plastic gas pipeline is applied to the anti-corrosion glass fiber reinforced plastic gas pipeline in claim 8, and is characterized by comprising the following steps: Firstly, selecting a qualified seamless steel pipe as a steel inner core pipe (7), performing sand blasting rust removal, cleaning and drying pretreatment on the inner and outer surfaces of the steel inner core pipe, ensuring that the surfaces are free of impurities and rust, and laying a foundation for subsequent coating lamination; secondly, preparing an inner lining anti-corrosion layer (6) on the inner wall of the steel inner core pipe (7) through electrostatic spraying or heating lamination process, ensuring that the inner lining is pore-free and crack-free, and tightly laminating the steel inner core pipe (7) to realize anti-corrosion isolation; Step three, placing the treated steel inner core pipe (7) on winding equipment, coating a glass fiber reinforced plastic material on the outer side of the steel inner core pipe by adopting a cross winding process, and performing heat curing treatment synchronously to form a glass fiber reinforced plastic reinforcing layer (8) so as to ensure uniform winding and tight bonding; Coating a resin-rich material containing a UV stabilizer on the outer side of the glass fiber reinforced plastic reinforcing layer (8), and adding a color paste marking layer after curing to form an outer protective layer (9) so as to finish the body preparation of the straight pipe main body (1) and the bent pipe main body (4); Step five, assembling all the components according to the field condition, installing an elbow joint module (3) with an anti-freezing module (5) through threaded fit, fastening flange connection and installing a sealing gasket (211), injecting anti-freezing medium into a filling cavity (311) and sealing, and enabling the anti-freezing medium to be located in a limit area formed by a first check ring (51) and a second check ring (52), so that an elbow main body (4) is firmly fixed in the anti-freezing joint main body (31), and then completing whole pipeline preparation and subsequent detection. .

Description

Corrosion-resistant glass fiber reinforced plastic gas pipeline and preparation method thereof Technical Field The invention relates to the technical field of gas pipelines, in particular to an anti-corrosion glass fiber reinforced plastic gas pipeline and a preparation method thereof. Background The safety, corrosion resistance and durability of gas delivery pipelines as a core infrastructure for energy delivery are directly related to the stability and public safety of energy supply. The traditional gas conveying pipeline is often a pure metal pipeline, is widely applied to high-pressure gas conveying by virtue of excellent pressure-bearing performance, is a traditional main flow pipeline type in the current gas conveying field, and is also required to be subjected to electroplating or paint spraying treatment in order to improve the service life of the traditional gas conveying pipeline, and the pure glass fiber reinforced plastic pipeline has excellent corrosion resistance without complex corrosion resistance treatment, but has the defects of high brittleness, poor impact resistance, insufficient axial strength and the like. Because of the metal characteristics of the pure metal pipelines, under the action of corrosive media such as hydrogen sulfide, carbon dioxide and the like contained in soil, underground water, moist air and fuel gas, electrochemical corrosion and stress corrosion cracking are easy to occur, fuel gas leakage is easy to occur due to corrosion perforation, and because the pipelines often adopt a single thread or flange structure design, the pipelines are in direct contact with each other, the heat conduction efficiency is extremely high, and frosting and icing are extremely easy to occur at low temperature. Disclosure of Invention The present invention has been made in view of the above-mentioned problems occurring in the prior art. Therefore, the invention aims to provide an anti-corrosion glass fiber reinforced plastic gas pipeline and a preparation method thereof, and aims to solve the problems that a pure metal pipeline is easily corroded by corrosive media such as soil, underground water, hydrogen sulfide in gas and the like due to the metal characteristics of the pure metal pipeline, electrochemical and stress corrosion cracking is generated and leakage is caused, the pipeline is directly contacted by single threads or flange connection, the heat conduction efficiency is high, and frost and ice are easy to form at low temperature. In order to achieve the aim, the invention provides the technical scheme that the anti-corrosion glass fiber reinforced plastic gas pipeline comprises a straight pipe main body, wherein both ends of the straight pipe main body are provided with closed flange modules, the closed flange modules are distributed along the axial direction of the straight pipe main body, both ends of the straight pipe main body are detachably provided with elbow joint modules through the closed flange modules, the straight pipe main body is communicated with an elbow pipe main body through the elbow joint modules, and an anti-freezing module for reducing the heat conduction efficiency of the elbow pipe main body is further arranged in the elbow joint modules; The straight pipe body and the bent pipe body are the same in material, the straight pipe body and the bent pipe body are sequentially provided with an inner lining anti-corrosion layer, a steel inner core pipe, a glass fiber reinforced plastic reinforcing layer and an outer protective layer from inside to outside, the glass fiber reinforced plastic reinforcing layer is made of glass fiber reinforced plastic, and the glass fiber reinforced plastic reinforcing layer is coated on the outer sides of the straight pipe body and the bent pipe body through a cross winding process and a heat curing process. As a preferable scheme of the anti-corrosion glass fiber reinforced plastic gas pipeline, the elbow joint module comprises an anti-freezing joint main body detachably connected with a straight pipe main body, one end of the anti-freezing joint main body extending into the straight pipe main body is provided with a straight pipe threaded end in threaded fit connection with the straight pipe main body, and one end of the anti-freezing joint main body, which is close to the straight pipe threaded end, is tightly attached to a sealing gasket. As a preferable scheme of the anti-corrosion glass fiber reinforced plastic gas pipeline, a filling cavity for filling an anti-freezing medium is formed in the anti-freezing joint main body, a pouring port communicated with the filling cavity is also formed in the anti-freezing joint main body, and the bent pipe main body penetrates through one end of the filling cavity and extends out of a straight pipe threaded end; the one end that straight tube screw thread end was kept away from to the anti-freezing joint main part is equipped with the maintenance screw thread end that links to each ot