Corrosion-resistant glass fiber reinforced plastic pipeline with sealing joints

Abstract

The utility model provides a corrosion-resistant glass fiber reinforced plastic pipeline with sealing joints, and belongs to the technical field of glass fiber reinforced plastic pipelines. Comprising a glass fiber reinforced plastic pipeline body, the glass fiber reinforced plastic pipeline body is divided into a first pipeline body and a second pipeline body, the opposite faces of the first pipeline body and the second pipeline body are each provided with a butt joint flange, the two butt joint flanges are connected through bolts, and sealing rings are arranged in the butt joint flanges. According to the utility model, the butt-joint assembly is additionally arranged at the joint of the glass fiber reinforced plastic pipeline, and particularly, the butt-joint sleeve and the butt-joint groove between the first butt-joint piece and the second butt-joint piece and the design of the internal glue injection cavity and the drainage groove are utilized, so that sealant can be injected in the connection process, and a connection gap is effectively filled up; and the sealing performance of the pipeline joint is greatly enhanced. By means of the design, the risk of medium leakage caused by aging of the sealing gasket is remarkably reduced, and the overall safety and reliability of a pipeline system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass fiber reinforced plastic pipelines, in particular to a corrosion-resistant glass fiber reinforced plastic pipeline with a sealing joint. Background Art

[0002] Glass fiber reinforced plastic pipes, also known as FRP pipes, are made of glass fibers with a resin matrix wound layer by layer on a rotating core mold according to process requirements, and quartz sand is evenly spread between the fibers at a long distance as a sand layer.

[0003] Utility model patent publication number CN202852218U proposes a corrosion-resistant fiberglass reinforced plastic (FRP) pipe comprising a base pipe, a composite layer, and a FRP casing. The base pipe is a 40-50mm thick steel pipe lined with a corrosion-resistant ceramic layer on its inner wall. The composite layer is sandwiched between the base pipe and the FRP casing, bonded together using hot-melt adhesive. The composite layer comprises an insulation layer and a corrosion-resistant layer. The insulation layer adheres closely to the base pipe, while the corrosion-resistant layer adheres to the outer wall of the insulation layer and is bonded to the FRP casing. The insulation layer is made of a foamed polyurethane insulation material, while the corrosion-resistant layer is made of a physically uniform mixture of resin and chloroprene rubber. This utility model has simple manufacturing processes, is easy to process, and offers excellent corrosion resistance.

[0004] In the above case, in actual use, after the FRP pipes are spliced, the pipes are usually connected by a gasket and bolts. During long-term use, the aging of the gasket can easily cause internal medium leakage. Therefore, the utility model provides a corrosion-resistant FRP pipe with a sealing joint to meet the needs. Utility Model Content

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A corrosion-resistant fiberglass reinforced plastic pipe with a sealing joint includes a fiberglass reinforced plastic pipe body, the fiberglass reinforced plastic pipe body is divided into a No. 1 pipe and a No. 2 pipe, the No. 1 pipe and the No. 2 pipe having docking flanges on their opposing surfaces, the two docking flanges being connected by bolts, and sealing rings being provided inside the docking flanges; and a docking assembly, the docking assembly being used to improve the sealing performance of the connection between the No. 1 pipe and the No. 2 pipe.

[0007] Optionally, the docking assembly includes a No. 1 docking piece mounted on the outside of the No. 1 pipe connection end and a No. 2 docking piece mounted on the outside of the No. 2 pipe connection end, the No. 2 docking piece is provided with an annular docking sleeve on the side facing the No. 1 docking piece, and the No. 1 docking piece is provided with a docking groove adapted to the docking sleeve on the side facing the No. 2 docking piece.

[0008] Optionally, a glue injection cavity is provided inside the docking sleeve, a drainage groove is provided on the outer surface of the docking sleeve, a glue injection hole is provided inside the drainage groove, and the drainage groove is connected to the glue injection cavity through the glue injection hole.

[0009] Optionally, the top of the No. 2 docking piece is fixedly connected with a glue injection tube, the output end of the glue injection tube is located inside the docking groove, and after the No. 2 docking piece is spliced ​​with the No. 1 docking piece, the output end of the glue injection tube is connected to the inside of the drainage groove.

[0010] Optionally, the No. 1 docking piece and the No. 2 docking piece are located outside the docking flange.

[0011] Optionally, the inner wall of the FRP pipe body is sprayed with epoxy FRP paint.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] In this solution, by adding a docking assembly to the FRP pipe joint, specifically utilizing the docking sleeve and docking groove structure between the No. 1 and No. 2 docking pieces, as well as the internal glue injection cavity and drainage groove design, sealant can be injected during the connection process, effectively filling the joint gap and greatly enhancing the sealing of the pipe joint. This design significantly reduces the risk of media leakage caused by aging gaskets and improves the overall safety and reliability of the pipeline system.

[0014] In this solution, the design of the injection tube and injection hole allows for convenient injection of new sealant into the injection cavity inside the butt joint when needed, enabling maintenance and repair of the seal without disassembling the entire pipe connection. This design not only simplifies the maintenance process but also reduces maintenance costs and time.

[0015] In this solution, the FRP pipe itself possesses excellent corrosion resistance, and the epoxy FRP coating applied to the inner wall further enhances this resistance, making it resistant to a variety of chemical media and extending the pipe's service life. Furthermore, the thermal insulation and corrosion-resistant layers within the composite layer provide additional protection, ensuring stable operation in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and enable those skilled in the relevant art to make and use the invention.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a corrosion-resistant fiberglass reinforced plastic pipeline with a sealed joint;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the FRP pipe;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the FRP pipe;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of .

[0021] [Reference Signs]

[0022] 1. Pipe No. 1; 2. Pipe No. 2; 3. Docking assembly; 301. Docking piece No. 1; 3011. Docking groove; 3012. Glue injection pipe; 302. Docking piece No. 2; 303. Docking sleeve; 304. Glue injection cavity; 305. Drainage groove; 306. Glue injection hole; 4. Docking flange.

[0023] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, devices and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0024] The following describes in detail a corrosion-resistant fiberglass reinforced plastic pipe with a sealed joint provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0025] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0026] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0027] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0028] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0029] like Figures 1 to 4As shown, the embodiment of the present invention provides a corrosion-resistant glass fiber reinforced plastic pipe with a sealing joint, including a glass fiber reinforced plastic pipe body, the glass fiber reinforced plastic pipe body is divided into a No. 1 pipe 1 and a No. 2 pipe 2, and the opposite surfaces of the No. 1 pipe 1 and the No. 2 pipe 2 are provided with a docking flange 4, the two docking flanges 4 are connected by bolts, and the interior of the docking flange 4 is provided with a sealing ring, a docking assembly 3, and the docking assembly 3 is used to improve the sealing of the connection between the No. 1 pipe 1 and the No. 2 pipe 2. The docking assembly 3 includes a No. 1 docking piece 301 sleeved on the outside of the connecting end of the No. 1 pipe 1 and a No. 2 docking piece 302 sleeved on the outside of the connecting end of the No. 2 pipe 2, the No. 2 docking piece 302 is provided with an annular docking sleeve 303 on the side facing the No. 1 docking piece 301, and the No. 1 docking piece 301 is opened on the side facing the No. 2 docking piece 302. There is a docking groove 3011 that is compatible with the docking sleeve 303, and a glue injection cavity 304 is opened inside the docking sleeve 303. A drainage groove 305 begins to be formed on the outer surface of the docking sleeve 303, and a glue injection hole 306 is opened inside the drainage groove 305. The drainage groove 305 is connected to the glue injection cavity 304 through the glue injection hole 306. The top of the No. 2 docking piece 302 is fixedly connected with a glue injection tube 3012, and the output end of the glue injection tube 3012 is located inside the docking groove 3011, and after the No. 2 docking piece 302 is spliced ​​with the No. 1 docking piece 301, the output end of the glue injection tube 3012 is at the same level as the inside of the drainage groove 305, and the No. 1 docking piece 301 and the No. 2 docking piece 302 are located outside the docking flange 4. First, ensure that the docking end faces of the No. 1 pipeline 1 and the No. 2 pipeline 2 are flat, clean, and free of impurities and oil stains. The No. 1 docking piece 301 and the No. 2 docking piece 302 are respectively placed on the outside of the connecting ends of the No. 1 pipe 1 and the No. 2 pipe 2, ensuring that they fit tightly and are correctly positioned. The two docking flanges 4 are initially connected using bolts. At this point, the sealing ring inside the docking flange 4 will provide a certain sealing effect, but it has not yet reached the optimal state. Sealant is injected into the injection cavity 304 inside the docking sleeve 303 through the injection tube 3012 at the top of the No. 2 docking piece 302. The sealant enters the drainage groove 305 through the injection hole 306 and is distributed along the drainage groove 305, ensuring that the sealant can evenly fill the gap between the docking sleeve 303 and the docking groove 3011. As the sealant is injected, it will form a continuous sealing layer between the docking sleeve 303 and the docking groove 3011.After the sealant is completely cured, the connection between pipe No. 1 and pipe No. 2 will achieve extremely high sealing, effectively preventing leakage of the internal medium. After the sealant is cured, a final inspection and test is carried out to ensure that there is no leakage at the connection and that it complies with relevant engineering standards and requirements. By adding a docking component 3 and injecting sealant into it, a continuous sealing layer is formed, which significantly improves the sealing of the pipe connection and reduces the risk of leakage. The FRP pipe body itself has excellent corrosion resistance, and the addition of the docking component 3 does not weaken this performance. On the contrary, it further protects the inside of the pipe from corrosion by enhancing the sealing. When maintenance and repair are required, it is only necessary to re-inject the sealant through the injection pipe 3012 without disassembling the entire connection part, reducing maintenance costs and time. The design of the docking component 3 makes pipe No. 1 and pipe No. 2 more stable at the connection, improving the structural stability and safety of the entire pipeline system. This design can be widely used in various pipeline systems that require high sealing and corrosion resistance, such as chemical, petroleum, pharmaceutical and other industries.

[0030] In this embodiment, if Figures 1 to 4 As shown, the inner wall of the FRP pipe body is spray-coated with epoxy FRP coating, a coating made from a mixture of epoxy resin and fiberglass cloth. Epoxy FRP coating offers excellent corrosion resistance. It resists acids, alkalis, salts, seawater, untreated sewage, and a variety of chemical fluids. This property enables FRP pipes to maintain long-term stable operation in harsh operating environments, extending their service life. Epoxy FRP coating is not only corrosion-resistant but also has excellent wear resistance. During fluid transportation, the inner wall of the pipe may be subject to erosion and wear. Epoxy FRP coating effectively reduces this wear and tear, protecting the integrity of the pipe wall. Epoxy FRP coating can withstand high temperatures, which is particularly important for piping systems operating in high-temperature environments. It maintains stable performance within a certain temperature range and will not fail or deform due to high temperatures. Epoxy FRP coating strongly bonds to the inner wall of the FRP pipe, forming a durable coating. This coating not only effectively prevents direct contact between the medium and the inner wall of the pipe, but also provides support and protection when the pipe is subjected to external forces. Due to its excellent corrosion resistance, wear resistance, and high-temperature resistance, epoxy FRP coatings can significantly extend the maintenance cycle of FRP pipes. This reduces maintenance costs and improves the economic efficiency of the pipeline system. Epoxy FRP coatings do not produce any harmful substances during use, making them environmentally friendly. Furthermore, waste coatings can be properly disposed of in accordance with environmental protection requirements, without causing any pollution.

[0031] The working principle provided by the present invention is as follows: first, ensure that the butt joint end surfaces of pipe No. 1 and pipe No. 2 are flat, clean, and free of impurities and oil. The butt joint piece 301 and the butt joint piece 302 are respectively placed on the outside of the connection ends of pipe No. 1 and pipe No. 2, ensuring that they fit tightly and are positioned correctly. The two butt joint flanges 4 are preliminarily connected by bolts. At this time, the sealing ring inside the butt joint flange 4 will provide a certain sealing effect, but it has not yet reached the optimal state. The sealant is injected into the injection cavity 304 inside the butt joint sleeve 303 through the injection tube 3012 at the top of the butt joint piece 302. The sealant enters the drainage groove 305 through the injection hole 306 and is distributed along the drainage groove 305 to ensure that the sealant can be evenly filled in the gap between the butt joint sleeve 303 and the butt joint groove 3011. As the sealant is injected, it will form a continuous sealing layer between the butt joint sleeve 303 and the butt joint groove 3011. After the sealant is completely cured, the connection between pipe No. 1 and pipe No. 2 will achieve extremely high sealing, effectively preventing leakage of internal media. After the sealant is cured, a final inspection and test will be carried out to ensure that there is no leakage at the connection and that it meets relevant engineering standards and requirements.

[0032] This invention encompasses any alternatives, modifications, equivalents, and solutions that do not depart from the spirit and scope of this invention. To provide a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention, but those skilled in the art will be able to fully understand this invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A corrosion-resistant glass fiber reinforced plastic pipe with a sealed joint, comprising a glass fiber reinforced plastic pipe body, characterized in that: The fiberglass reinforced plastic pipe body is divided into a No. 1 pipe (1) and a No. 2 pipe (2), and the No. 1 pipe (1) and the No. 2 pipe (2) are both provided with a docking flange (4) on their opposite surfaces, the two docking flanges (4) are connected by bolts, and a sealing ring is provided inside the docking flange (4); A docking assembly (3) is provided, wherein the docking assembly (3) is used to improve the sealing performance of the connection between the No. 1 pipeline (1) and the No. 2 pipeline (2).

2. The corrosion-resistant glass fiber reinforced plastic pipe with a sealing joint according to claim 1, characterized in that: The docking assembly (3) comprises a first docking piece (301) sleeved on the outside of the connection end of the first pipe (1) and a second docking piece (302) sleeved on the outside of the connection end of the second pipe (2); the second docking piece (302) is provided with an annular docking sleeve (303) on one side facing the first docking piece (301); and the first docking piece (301) is provided with a docking groove (3011) adapted to the docking sleeve (303) on one side facing the second docking piece (302).

3. The corrosion-resistant glass fiber reinforced plastic pipe with a sealing joint according to claim 2, characterized in that: A glue injection cavity (304) is provided inside the docking sleeve (303), a drainage groove (305) is provided on the outer surface of the docking sleeve (303), a glue injection hole (306) is provided inside the drainage groove (305), and the drainage groove (305) and the glue injection cavity (304) are communicated through the glue injection hole (306).

4. The corrosion-resistant glass fiber reinforced plastic pipe with a sealing joint according to claim 3, characterized in that: The top of the second docking piece (302) is fixedly connected to a glue injection tube (3012), the output end of the glue injection tube (3012) is located inside the docking groove (3011), and after the second docking piece (302) and the first docking piece (301) are spliced ​​together, the output end of the glue injection tube (3012) is connected to the inside of the drainage groove (305).

5. The corrosion-resistant glass fiber reinforced plastic pipe with a sealing joint according to claim 4, characterized in that: The first docking piece (301) and the second docking piece (302) are located outside the docking flange (4).

6. The corrosion-resistant glass fiber reinforced plastic pipe with a sealing joint according to claim 1, characterized in that: The inner wall of the glass fiber reinforced plastic pipe body is sprayed with epoxy glass fiber reinforced plastic paint.

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