Reinforced polypropylene molded drain pipe with anticorrosion function

Abstract

The utility model relates to a drainage pipe technical field especially a reinforced polypropylene mould pressing drainage pipe with anticorrosive function, including the pipe body, the pipe body includes the reinforced polypropylene drainage pipe, anticorrosive layer and protective layer that set up in turn from inside to outside, the outside of reinforced polypropylene drainage pipe is connected with anticorrosive layer and protective layer in turn through hot melting, anticorrosive layer is made of ethylene propylene rubber material, protective layer is made of high density polyethylene material, one end of pipe body is provided with annular connecting groove, the other end of pipe body is provided with annular connecting boss, the outside of annular connecting boss is provided with first sealing groove, the inside of annular connecting boss is provided with second sealing groove, the utility model discloses reinforced polypropylene drainage pipe guarantees the basic strength and drainage function of pipeline, the anticorrosive layer made of ethylene propylene rubber can effectively isolate the corrosion medium in the soil, the protective layer made of high density polyethylene further enhances the overall protection effect, effectively solved the problem that the existing drainage pipe anticorrosive performance is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of drainage pipe technology, and more specifically to a reinforced polypropylene molded drainage pipe with anti-corrosion function. Background Technology

[0002] Polypropylene molded drainage pipes are widely used in municipal drainage and industrial sewage treatment due to their advantages such as light weight, corrosion resistance, and ease of processing. However, existing technologies still have significant drawbacks when used long-term in complex soil environments (such as saline-alkali land and chemical industrial zones).

[0003] Existing polypropylene drainage pipes mostly rely on single-material modification to improve corrosion resistance, lacking a physical isolation mechanism. When microcracks appear on the outer wall of the pipe due to mechanical damage or environmental aging, corrosive media in the soil (such as salts, acids, and microorganisms) can easily directly erode the main structure of the pipe, leading to a decrease in pipe strength or even leakage. Some solutions that use external coating protection are easily damaged by scratches during transportation and installation, making it difficult to guarantee long-term corrosion protection. Utility Model Content

[0004] The purpose of this invention is to provide a reinforced polypropylene molded drainage pipe with anti-corrosion function, thereby solving the problem of insufficient anti-corrosion performance of existing drainage pipes.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A reinforced polypropylene molded drainage pipe with anti-corrosion function includes a pipe body. The pipe body includes a reinforced polypropylene drainage pipe, an anti-corrosion layer, and a protective layer arranged sequentially from the inside to the outside. The anti-corrosion layer and the protective layer are sequentially connected to the outside of the reinforced polypropylene drainage pipe by hot fusion. The anti-corrosion layer is made of EPDM rubber material, and the protective layer is made of high-density polyethylene material. An annular connecting groove is provided at one end of the pipe body, and an annular connecting boss is provided at the other end of the pipe body. A first sealing groove is provided on the outside of the annular connecting boss, and a second sealing groove is provided on the inside of the annular connecting boss.

[0007] Furthermore, the annular connecting groove has a chamfer at the opening.

[0008] Furthermore, the annular connecting boss has a first guide slope on the outer side of the end away from the tube body and a second guide slope on the inner side.

[0009] Furthermore, the outer side of the tube is provided with multiple annular reinforcing ribs at equal intervals.

[0010] Furthermore, a plurality of strip-shaped reinforcing ribs are provided on the outer side wall of the tube body. The strip-shaped reinforcing ribs are arranged along the axial direction of the tube body and are perpendicular to the annular reinforcing ribs.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This application employs a three-layer structural design to create a multi-layered protection system, effectively addressing the insufficient corrosion resistance of existing drainage pipes. The reinforced polypropylene drainage pipe serves as the main structure, ensuring the pipe's foundation strength and drainage function. The EPDM rubber anti-corrosion layer possesses excellent chemical corrosion resistance, weather resistance, and elasticity, effectively isolating corrosive media in the soil and preventing them from directly eroding the main pipe structure. The high-density polyethylene protective layer boasts high hardness and wear resistance, protecting the anti-corrosion layer from scratches and damage during transportation and installation, further enhancing the overall protective effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0016] Figure 4 This is a partial sectional view of the present invention.

[0017] 1. Pipe body; 101. Annular connecting groove; 11. Reinforced polypropylene drainage pipe; 12. Anti-corrosion layer; 13. Protective layer; 2. Annular connecting boss; 201. First sealing groove; 202. Second sealing groove; 3. Chamfer; 4. First guide slope; 5. Second guide slope; 6. Annular reinforcing rib; 7. Strip reinforcing rib. Detailed Implementation

[0018] like Figures 1 to 4 As shown, a reinforced polypropylene molded drainage pipe with anti-corrosion function includes a pipe body 1. The pipe body 1 includes a reinforced polypropylene drainage pipe 11, an anti-corrosion layer 12, and a protective layer 13 arranged sequentially from the inside to the outside. The anti-corrosion layer 12 and the protective layer 13 are sequentially connected to the outside of the reinforced polypropylene drainage pipe 11 by hot fusion. The anti-corrosion layer 12 is made of EPDM rubber, and the protective layer 13 is made of high-density polyethylene. One end of the pipe body 1 is provided with an annular connecting groove 101, and the other end of the pipe body 1 is provided with an annular connecting boss 2. The outer side of the annular connecting boss 2 is provided with a first sealing groove 201, and the inner side of the annular connecting boss 2 is provided with a second sealing groove 202.

[0019] The annular connecting groove 101 has a chamfer 3 at the opening.

[0020] The annular connecting boss 2 has a first guide slope 4 on the outer side of the end away from the tube body 1, and a second guide slope 5 on the inner side.

[0021] Multiple annular reinforcing ribs 6 are provided at equal intervals on the outer side of the pipe body 1. The annular reinforcing ribs 6 can significantly improve the circumferential stiffness and compressive strength of the pipe body 1, making the pipe less prone to deformation when subjected to soil pressure and external loads, enhancing the structural stability of the pipe, and extending its service life. It is especially suitable for working conditions with greater burial depth or higher soil pressure.

[0022] Multiple strip-shaped reinforcing ribs 7 are provided on the outer wall of the pipe body 1. The strip-shaped reinforcing ribs 7 are arranged along the axial direction of the pipe body 1 and are perpendicular to the annular reinforcing ribs 6. The strip-shaped reinforcing ribs 7 and the annular reinforcing ribs 6 form a crisscross reinforcing structure, which can not only improve the axial strength and tensile performance of the pipe body 1, but also further enhance the circumferential stiffness, so that the pipeline can maintain good structural stability under various stress conditions (such as axial tension, bending force, etc.) and comprehensively improve the mechanical performance of the pipeline.

[0023] Working principle:

[0024] During operation, the reinforced polypropylene drainage pipe 11 serves as the core drainage channel, responsible for transporting media such as sewage and rainwater. The three-layer structure of the pipe body 1 works synergistically from the inside out: the reinforced polypropylene drainage pipe 11 provides basic support and drainage function; the middle EPDM rubber anti-corrosion layer 12 is tightly attached to the outside of the reinforced polypropylene drainage pipe 11, and with its excellent corrosion resistance and sealing properties, it blocks the contact between corrosive media in the soil and the reinforced polypropylene drainage pipe 11, preventing the main body of the pipe body 1 from being corroded; the outer high-density polyethylene (HDPE) protective layer 13 effectively protects the anti-corrosion layer 12, preventing the anti-corrosion layer 12 from being damaged by friction and collision in the external environment, and ensuring the long-term effectiveness of the anti-corrosion layer 12.

[0025] During pipe connection, the annular connecting boss 2 of one pipe is inserted into the annular connecting groove 101 of another pipe. Through the chamfer 3 at the opening of the annular connecting groove 101 and the coordinated guiding action of the first guide slope 4 and the second guide slope 5 of the annular connecting boss 2, the annular connecting boss 2 smoothly enters the annular connecting groove 101 and achieves precise alignment. At this time, sealing rings (such as nitrile rubber sealing rings, silicone rubber sealing rings, etc.) are installed in the first sealing groove 201 and the second sealing groove 202. Under the connecting pressure, the sealing rings undergo elastic deformation, tightly filling the gap between the sealing groove and the annular connecting boss 2 or the annular connecting groove 101, forming a double seal and effectively preventing media leakage.

[0026] In addition, the annular reinforcing ribs 6 and strip reinforcing ribs 7 on the outside of the pipe body 1 together enhance the structural strength of the pipe body 1, enabling the pipe to withstand external forces such as soil pressure and ground load in the buried environment, maintain the stability of the pipe body shape, and ensure unobstructed drainage channels.

[0027] In terms of corrosion resistance, this utility model features a three-layer structure (reinforced polypropylene drainage pipe, EPDM rubber anti-corrosion layer, and high-density polyethylene protective layer) that forms a corrosion protection system that combines physical isolation with material protection. This significantly improves the corrosion resistance and service life of pipelines in complex soil environments (such as saline-alkali land and chemical industrial zones), and solves the problems of limited anti-corrosion effect of single-material modification and easy damage of external coatings in existing technologies.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A reinforced polypropylene molded drainage pipe with corrosion-resistant function, characterized in that: The device includes a pipe body (1), which includes a reinforced polypropylene drainage pipe (11), an anti-corrosion layer (12), and a protective layer (13) arranged sequentially from the inside to the outside. The reinforced polypropylene drainage pipe (11) is connected to the anti-corrosion layer (12) and the protective layer (13) sequentially by hot-melt. The anti-corrosion layer (12) is made of EPDM rubber, and the protective layer (13) is made of high-density polyethylene. One end of the pipe body (1) is provided with an annular connecting groove (101), and the other end of the pipe body (1) is provided with an annular connecting boss (2). The outer side of the annular connecting boss (2) is provided with a first sealing groove (201), and the inner side of the annular connecting boss (2) is provided with a second sealing groove (202).

2. The reinforced polypropylene molded drainage pipe with anti-corrosion function as described in claim 1, characterized in that: The annular connecting groove (101) has a chamfer (3) at the opening.

3. The reinforced polypropylene molded drainage pipe with anti-corrosion function as described in claim 2, characterized in that: The annular connecting boss (2) has a first guide slope (4) on the outer side of the end away from the tube body (1) and a second guide slope (5) on the inner side.

4. The reinforced polypropylene molded drainage pipe with anti-corrosion function as described in claim 1, characterized in that: The outer side of the tube (1) is provided with multiple annular reinforcing ribs (6) at equal intervals.

5. The reinforced polypropylene molded drainage pipe with anti-corrosion function as described in claim 4, characterized in that: Multiple strip-shaped reinforcing ribs (7) are provided on the outer side wall of the tube body (1). The strip-shaped reinforcing ribs (7) are arranged along the axial direction of the tube body (1) and are arranged perpendicular to the annular reinforcing ribs (6).

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