Corrosion-resistant enhanced HDPE (high-density polyethylene) pipe

Abstract

The utility model relates to the technical field of HDPE (High-Density Polyethylene) pipes, and discloses a corrosion-resistant enhanced HDPE pipe which comprises a pipe body, the pipe body comprises an HDPE core body layer, a steel rib pipe frame, a PVDF layer, an anti-corrosion layer and an anti-corrosion coating. The HDPE core body layer is arranged on the steel rib pipe frame in an injection molding mode through a high polyvinyl chloride material so as to wrap the steel rib pipe frame to form an integrally-formed pipe body layer structure. The PVDF layer is adaptively arranged on the inner wall of the HDPE core body layer; the surface of the anti-corrosion layer is net-shaped; the inner wall of the anti-corrosion layer is connected with the outer wall of the HDPE core body layer in a matched mode. And the corrosion-resistant coating is coated on the outer wall of the corrosion-resistant layer. According to the corrosion-resistant enhanced HDPE pipe, under the action of the multi-layer corrosion-resistant structure, the corrosion resistance of a pipeline is effectively improved, the overall strength of the pipeline is enhanced, the corrosion-resistant enhanced HDPE pipe is more stable and reliable under high-pressure or complex geological conditions, the corrosion resistance and the structural strength are both improved, and the service life of the pipeline is prolonged. And the high requirements on pipeline materials in complex and changeable environments can be better met.

Description

TECHNICAL FIELD

[0001] The utility model relates to HDPE pipe technical field especially is related to a kind of corrosion-resistant reinforced HDPE pipe. BACKGROUND

[0002] Although the traditional HDPE pipeline has certain corrosion resistance and light weight, high strength and other characteristics, when facing extreme environment, such as strong acid, strong alkali or high salinity and other corrosive media, its service life and performance are often severely affected. In addition, the pipeline of single material also has limitations in bearing pressure, and it is difficult to meet the needs of some special application scenarios.

[0003] The Chinese patent with patent number CN214618243U discloses an HDPE pipe with good corrosion resistance, which includes a pipe body. The pipe body includes a corrosion-resistant layer, an LDPE resin layer is fixedly connected to the outer side of the corrosion-resistant layer, a water stop layer is fixedly connected to the outer side of the LDPE resin layer, an HDPE resin layer is fixedly connected to the outer side of the water stop layer, a plurality of connecting blocks are fixedly connected between the LDPE resin layer and the HDPE resin layer, and a carbon fiber layer is fixedly connected to the outer side of the HDPE resin layer. However, the HDPE pipe with good corrosion resistance adopts a combination of a corrosion-resistant layer, an LDPE resin layer, a water stop layer and a carbon fiber layer to form a pipe body. The corrosion resistance and strength of the pipe body are still not good, and the design needs to be enhanced to meet the high requirements of pipeline materials in complex and variable environments. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the problems of the prior art and providing a corrosion-resistant reinforced HDPE pipe.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following scheme:

[0006] A corrosion-resistant reinforced HDPE pipe includes a pipe body. The pipe body includes:

[0007] An HDPE core layer and a steel skeleton pipe frame. The HDPE core layer is injection molded on the steel skeleton pipe frame by high polyvinyl chloride material to cover the steel skeleton pipe frame and form an integrally formed pipe body layer structure. The design of the pipe body layer structure formed by the combination of the HDPE core layer and the steel skeleton pipe frame not only improves the corrosion resistance of the pipeline, but also utilizes the excellent toughness and impact resistance of the HDPE material to improve the breaking resistance of the pipeline. At the same time, the design of the steel skeleton pipe frame can further provide additional support for the pipeline, making it more stable and reliable when facing high pressure or complex geological conditions. The structure is stable and reliable.

[0008] The PVDF layer is arranged on the inner wall of the HDPE core layer; the PVDF layer not only has excellent corrosion resistance to most chemicals and solvents, including strong acids, strong bases, oxidizing agents and organic solvents, but also has high strength, high hardness and good toughness, good tensile strength, effectively isolates the erosion of the internal medium of the pipeline to the HDPE core layer, and further prolongs the service life of the pipeline.

[0009] The anticorrosion layer has a mesh surface; the inner wall of the anticorrosion layer is connected with the outer wall of the HDPE core layer; the mesh design of the anticorrosion layer not only increases the contact area between the anticorrosion layer and the HDPE core layer, improves the bonding strength, but also increases the surface area of the anticorrosion layer through the mesh structure on the surface of the anticorrosion layer, which is beneficial to better adsorption and dispersion of corrosive medium, can more effectively block the invasion of corrosive medium, thereby improving the corrosion resistance of the material, further slowing down the corrosion speed, and the mesh structure can provide better protection when bearing external impact and wear. In addition, the inner wall of the anticorrosion layer is connected with the outer wall of the HDPE core layer, which ensures the tightness and stability of the structure.

[0010] The corrosion-resistant coating is coated on the outer wall of the anticorrosion layer; it is made of high-performance corrosion-resistant material and has excellent chemical corrosion resistance, providing an additional protective barrier for the pipeline, so that it can maintain excellent performance in various harsh environments.

[0011] Further, the corrosion-resistant coating is a polytetrafluoroethylene coating or a polyethylene coating, which has excellent corrosion resistance and provides an additional protective barrier for the pipeline, so that it can maintain excellent performance in various harsh environments.

[0012] Further, the anticorrosion layer is a glass fiber layer, which makes the pipeline have good mechanical properties, corrosion resistance and light weight.

[0013] Further, the steel skeleton pipe frame includes steel skeleton bars and steel ring bodies; the steel skeleton bars are evenly arranged around the central axis of the pipe body and connected with each other through the steel ring bodies; the steel ring bodies are arranged along the length direction of the steel skeleton bars, which have good strength and stiffness, and are beneficial to enhance the stability of the structure.

[0014] Further, the number of steel skeleton bars is 3, 4, 5 or 6.

[0015] Further, the thickness of the HDPE core layer is greater than the sum of the thicknesses of the PVDF layer and the anticorrosion layer.

[0016] Further, the outer wall of the HDPE core layer is provided with a plurality of first protruding strips arranged along the length direction and around the central axis of the pipe body; the inner wall of the corrosion-resistant layer is provided with a plurality of first long groove slots corresponding to the first protruding strips.

[0017] Further, the outer wall of the PVDF layer is provided with a plurality of second protruding strips arranged along the length direction and around the central axis of the pipe body; the inner wall of the HDPE core layer is provided with a plurality of second long groove slots corresponding to the second protruding strips.

[0018] Further, the first protruding strips and the second protruding strips are in the shape of semicylindrical strips or square columnar strips.

[0019] Compared with the prior art, the utility model has the advantages of:

[0020] The utility model discloses a HDPE core layer, steel skeleton pipe frame, PVDF layer, corrosion-resistant layer and corrosion-resistant coating are combined to form the pipe body, and the multi-layer structure design is adopted, the HDPE core layer is used as the basic layer, and then the PVDF layer, the corrosion-resistant layer and the corrosion-resistant coating are introduced, and the high polyvinyl chloride material is injection molded on the steel skeleton pipe frame to form the HDPE core layer, which is used for covering the steel skeleton pipe frame to form the integrally-formed pipe body layer structure, the corrosion-resistant performance of the pipeline is effectively improved under the action of the multi-layer corrosion-resistant structure, and the overall strength of the pipeline is enhanced, and the pipeline is more stable and reliable when facing high pressure or complex geological conditions, realizes the double promotion of corrosion-resistant performance and structural strength, and better meets the high requirements of the pipeline material in the complex and changeable environment. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be described in further detail below in combination with the drawings and specific embodiments.

[0022] Fig. 1 It is the three-dimensional structure schematic diagram of the corrosion-resistant reinforced HDPE pipe of the utility model.

[0023] Fig. 2 It is the three-dimensional structure schematic diagram of the corrosion-resistant reinforced HDPE pipe of the utility model.

[0024] Fig. 3 It is the front view structure schematic diagram of the corrosion-resistant reinforced HDPE pipe of the utility model.

[0025] The drawings include:

[0026] Pipe body 10, corrosion-resistant coating 1, corrosion-resistant layer 2, HDPE core layer 3, steel skeleton pipe frame 4, steel skeleton support 41, steel ring body 42, PVDF layer 5, first protruding strip 6, second protruding strip 7, first long groove 8, second long groove 9. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0028] As shown in the drawings, Figs. 1 to 3 A corrosion-resistant reinforced HDPE pipe includes a pipe body 10. The pipe body 10 includes a corrosion-resistant coating 1, a corrosion-resistant layer 2, an HDPE core layer 3, a steel skeleton pipe frame 4, and a PVDF layer 5. The HDPE core layer 3 is a high-density polyethylene core layer 3. The HDPE core layer 3 is injection molded on the steel skeleton pipe frame 4 by high polyvinyl chloride material to cover the steel skeleton pipe frame 4 to form an integrally formed pipe body layer 5 structure. The design of the pipe body layer 5 structure formed by the combination of the HDPE core layer 3 and the steel skeleton pipe frame 4 not only improves the corrosion resistance of the pipe, but also takes advantage of the excellent toughness and impact resistance of the HDPE material to improve the pipe's breaking resistance. At the same time, the design of the steel skeleton pipe frame 4 can further provide additional support for the pipe, making it more stable and reliable when facing high pressure or complex geological conditions. The PVDF layer 5 is a polyvinylidene fluoride layer 5. The PVDF layer 5 is appropriately arranged on the inner wall of the HDPE core layer 3. The PVDF layer 5 not only exhibits excellent corrosion resistance to most chemicals and solvents, including strong acids, strong bases, oxidizing agents, and organic solvents, but also has high strength, high hardness, and good toughness, and good tensile strength, effectively isolating the erosion of the HDPE core layer 3 by the internal medium of the pipe, further prolonging the service life of the pipe. The surface of the corrosion-resistant layer 2 is net-like. The inner wall of the corrosion-resistant layer 2 is connected with the outer wall of the HDPE core layer 3. This unique design not only increases the contact area between the corrosion-resistant layer 2 and the HDPE core layer 3, improves the bonding strength, but also increases the surface area of the corrosion-resistant layer 2 by designing a net-like structure on the surface of the corrosion-resistant layer 2, which is beneficial to better adsorption and dispersion of corrosive medium, can more effectively block the invasion of corrosive medium, thereby improving the corrosion resistance of the material, and further slowing down the corrosion rate, and the net-like structure can provide better protection when bearing external impact and wear. In addition, the inner wall of the corrosion-resistant layer 2 is connected with the outer wall of the HDPE core layer 3, ensuring the tightness and stability of the structure. The corrosion-resistant coating 1 is coated on the outer wall of the corrosion-resistant layer 2, made of high-performance corrosion-resistant material, has excellent chemical corrosion resistance, provides an additional protective barrier for the pipe, so that it can maintain excellent performance in various harsh environments.

[0029] The corrosion-resistant reinforced HDPE pipe is formed by combining the HDPE core layer 3, the steel skeleton pipe frame 4, the PVDF layer 5, the corrosion-resistant layer 2 and the corrosion-resistant coating 1 to form the pipe body 10. Through the multi-layer 5 structure design, the HDPE core layer 3 is used as the base layer 5, and the PVDF layer 5, the corrosion-resistant layer 2 and the corrosion-resistant coating 1 are introduced, and the high polyvinyl chloride material is injected on the steel skeleton pipe frame 4 to form the HDPE core layer 3 for covering the steel skeleton pipe frame 4 to form an integrally formed pipe body layer 5 structure. Under the action of the multi-layer 5 corrosion-resistant structure, the corrosion-resistant performance of the pipe is effectively improved, and the overall strength of the pipe is enhanced, which is more stable and reliable in the face of high pressure or complex geological conditions, realizes the double improvement of corrosion-resistant performance and structural strength, and better meets the high requirements for pipe materials in complex and variable environments.

[0030] In the present embodiment, the corrosion-resistant coating 1 and the corrosion-resistant layer 2 are outside the HDPE core layer 3. Preferably, the corrosion-resistant coating 1 is a polytetrafluoroethylene coating 5 or a polyethylene coating 5, which has excellent corrosion-resistant performance and provides an additional protective barrier for the pipe, enabling it to maintain excellent performance in various harsh environments. For the corrosion-resistant layer 2, preferably, the corrosion-resistant layer 2 is a glass fiber layer 5, which enables the pipe to have good mechanical properties, corrosion-resistant performance and lightweight characteristics.

[0031] In the present embodiment, the steel skeleton pipe frame 4 includes steel skeleton bars 41 and steel ring bodies 42; a plurality of steel skeleton bars 41 are uniformly arranged around the central axis of the pipe body 10 and connected to each other through the steel ring bodies 42; and a plurality of steel ring bodies 42 are arranged along the length direction of the steel skeleton bars 41. By arranging the steel skeleton bars 41 and the steel ring bodies 42 and designing the number and position, the steel skeleton pipe frame 4 is formed, which has good strength and rigidity and is beneficial to enhance the stability of the structure. Therefore, the high polyvinyl chloride material is injected on the steel skeleton pipe frame 4 to form the HDPE core layer 3 for covering the steel skeleton pipe frame 4 to form an integrally formed pipe body layer 5 structure. Under the action of the multi-layer 5 corrosion-resistant structure, the corrosion-resistant performance of the pipe is effectively improved, and the overall strength of the pipe is enhanced, which is more stable and reliable in the face of high pressure or complex geological conditions, realizes the double improvement of corrosion-resistant performance and structural strength, and better meets the high requirements for pipe materials in complex and variable environments.

[0032] As for the number of steel skeleton bars 41, the number of steel skeleton bars 41 can be 3, 4, 5 or 6. The number of steel skeleton bars 41 is reasonably designed according to the requirements, which is beneficial to enhance the rigidity and strength of the HDPE core layer 3, and is beneficial to realize the double improvement of corrosion-resistant performance and structural strength, and better meet the high requirements for pipe materials in complex and variable environments. Of course, the number of steel skeleton bars 41 is not limited to this, and other numbers of steel skeleton bars 41 can be reasonably designed according to the requirements.

[0033] In the embodiment, the thickness of the HDPE core layer 3 is greater than the sum of the thicknesses of the PVDF layer 5 and the corrosion-resistant layer 2. The HDPE core layer 3 serves as the main structure of the pipeline, and its thickness is greater than the sum of the thicknesses of the PVDF layer 5 and the corrosion-resistant layer 2. In terms of mechanical properties, the HDPE core layer 3 can better withstand external pressure and more effectively disperse pressure, reducing the possibility of pipeline deformation and ensuring normal use of the pipeline. In addition, the thicker HDPE core layer 3 has better buffering capacity when subjected to accidental impact, such as being hit by tools on the construction site or being hit during transportation, and can absorb and disperse impact energy, reducing the risk of pipeline damage. In terms of durability, the thicker HDPE core layer 3 has good chemical corrosion resistance, providing more durable corrosion-resistant protection for the pipeline, while other thinner structural layers 5 may not provide such durable corrosion-resistant protection, which is beneficial to improving the overall safety of the corrosion-resistant reinforced HDPE pipe.

[0034] In the embodiment, the outer wall of the HDPE core layer 3 is provided with a plurality of first protruding strips 6 arranged along the length direction and around the central axis of the pipe body 10; the inner wall of the corrosion-resistant layer 2 is provided with a plurality of first long groove 8 corresponding to the number of the first protruding strips 6. The outer wall of the PVDF layer 5 is provided with a plurality of second protruding strips 7 arranged along the length direction and around the central axis of the pipe body 10; the inner wall of the HDPE core layer 3 is provided with a plurality of second long grooves 9 corresponding to the number of the second protruding strips 7. By arranging the first protruding strips 6 and the second long grooves 9 on the outer wall and the inner wall of the HDPE core layer 3, the first long grooves 8 on the inner wall of the corrosion-resistant layer 2, and the second protruding strips 7 on the outer wall of the PVDF layer 5, the first protruding strips 6 and the first long grooves 8, the second protruding strips 7 and the second long grooves 9 are matched, realizing the close composite connection of the corrosion-resistant layer 2, the HDPE core layer 3 and the PVDF layer 5, and the structure is more stable and reliable.

[0035] Preferably, the first protruding strips 6 and the second protruding strips 7 are in the shape of half-cylindrical strips or square columnar strips. The corresponding first long grooves 8 and the second long grooves 9 also have the same corresponding shapes as the first protruding strips 6 and the second protruding strips 7, and the structure design is simple and convenient for production. Of course, the first protruding strips 6 and the second protruding strips 7 can also be designed in other shapes according to requirements, such as T-shaped columnar strips.

[0036] In conclusion, the utility model discloses a kind of corrosion-resistant reinforced HDPE pipe, wherein, the corrosion-resistant reinforced HDPE pipe is combined by setting HDPE core layer 3, steel skeleton pipe frame 4, PVDF layer 5, corrosion-resistant layer 2 and corrosion-resistant coating 1, to form pipe body 10;Such through multilayer 5 structure design, using HDPE core layer 3 as base layer 5, then introduce is PVDF layer 5, corrosion-resistant layer 2 and corrosion-resistant coating 1, and high polyvinyl chloride material injection molding is formed HDPE core layer 3 on the steel skeleton pipe frame 4, for covering steel skeleton pipe frame 4 to form integrally formed pipe body layer 5 structure, under the action of multilayer 5 corrosion-resistant structure, effectively improve the corrosion resistance of pipeline, and strengthen the overall strength of pipeline, when facing high pressure or complex geological conditions, more stable and reliable, realize the double promotion of corrosion-resistant performance and structural strength, better satisfy the high requirement of pipeline material in complex environment.

[0037] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, several improvements and substitutions can also be made, and these improvements and substitutions should be considered as the protection scope of the present application.

Claims

1. A corrosion resistant reinforced HDPE pipe comprising a pipe body; characterized in that, The pipe body comprises: an HDPE core layer, a steel skeleton pipe frame; the HDPE core layer is injection molded on the steel skeleton pipe frame by high polyvinyl chloride material to coat the steel skeleton pipe frame to form an integrally formed pipe body layer structure; a PVDF layer, which is adaptively arranged on the inner wall of the HDPE core layer; a corrosion-resistant layer, the surface of which is reticular; the inner wall of the corrosion-resistant layer is adaptively connected with the outer wall of the HDPE core layer; a corrosion-resistant coating, which is coated on the outer wall of the corrosion-resistant layer.

2. The corrosion resistant reinforced HDPE pipe according to claim 1, characterized in that, The corrosion-resistant coating is a polytetrafluoroethylene coating or a polyethylene coating.

3. The corrosion resistant reinforced HDPE pipe according to claim 1, characterized in that, The corrosion-resistant layer is a glass fiber layer.

4. The corrosion resistant reinforced HDPE pipe according to claim 1, wherein, The steel skeleton pipe frame comprises steel skeleton bars and steel ring bodies; a plurality of steel skeleton bars are uniformly arranged around the central axis of the pipe body and connected with each other through the steel ring bodies; a plurality of steel ring bodies are arranged along the length direction of the steel skeleton bars.

5. The corrosion-resistant reinforced HDPE pipe according to claim 4, characterized in that, The number of the steel skeleton bars is 3, 4, 5 or 6.

6. The corrosion resistant reinforced HDPE pipe according to claim 1 or 4, characterized in that, The thickness of the HDPE core layer is greater than the sum of the thicknesses of the PVDF layer and the corrosion-resistant layer.

7. The corrosion resistant reinforced HDPE pipe according to claim 1, wherein, The outer wall of the HDPE core layer is provided with a plurality of first protruding strips arranged along the length direction thereof and around the central axis of the pipe body; the inner wall of the corrosion-resistant layer is provided with a plurality of first long groove strips which are the same in number as the first protruding strips and adaptively connected one by one.

8. The corrosion-resistant reinforced HDPE pipe according to claim 7, characterized in that, The outer wall of the PVDF layer is provided with a plurality of second protruding strips arranged along the length direction thereof and around the central axis of the pipe body; the inner wall of the HDPE core layer is provided with a plurality of second long groove strips which are the same in number as the second protruding strips and adaptively connected one by one.

9. The corrosion-resistant reinforced HDPE pipe according to claim 8, characterized in that, The first protruding strips and the second protruding strips are in the shape of half-cylindrical strips or square columnar strips.

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