Composite plastic-coated steel pipe with high impact resistance

Abstract

The utility model discloses a composite plastic-coated steel pipe with strong impact resistance, which comprises a steel pipe body, a plastic-coated layer is coated on the inner wall of the circumference of the steel pipe body, an anti-corrosion layer is coated on the outer wall of the circumference of the steel pipe body, a wear-resistant layer is sprayed on the outer side of the anti-corrosion layer, and an anti-impact layer is sprayed on the outer side of the wear-resistant layer. The plastic-coated layer and the anticorrosive layer are respectively a polyurethane coating and a polypropylene coating, the impact-resistant layer is an RJ impact-resistant wear-resistant coating or a POM material, the wear-resistant layer is an epoxy resin coating or a ceramic coating, lifting lugs are fixedly connected to the outer wall of the top and the outer wall of the bottom of the steel pipe body, and flanges are fixedly connected to the two ends of the steel pipe body. According to the wear-resistant steel pipe, the anti-impact layer and the wear-resistant layer are matched for use, so that the steel pipe body has excellent anti-impact performance and is more wear-resistant, and the corrosion layer of the steel pipe body is prevented from being easily damaged.

Description

Technical Field

[0001] This utility model relates to the field of plastic-coated steel pipe technology, and in particular to a composite plastic-coated steel pipe with strong impact resistance. Background Technology

[0002] Plastic-coated steel pipe, also known as plastic-coated composite steel pipe or steel-plastic composite pipe, is a new type of steel pipe material that combines the strength of steel pipe with the corrosion resistance of plastic. It is widely used in many industries.

[0003] However, the following defects still exist: when subjected to severe impact, the coating of existing composite plastic-coated steel pipes may crack or peel off, thereby destroying its anti-corrosion function and making the steel pipe substrate susceptible to corrosion by corrosive substances in sewage, which in turn causes damage to the steel pipe. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a composite plastic-coated steel pipe with high impact resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A composite plastic-coated steel pipe with high impact resistance includes a steel pipe body, the inner circumference of which is coated with a plastic coating layer, the outer circumference of which is coated with an anti-corrosion layer, a wear-resistant layer is sprayed on the outside of the anti-corrosion layer, and an impact-resistant layer is sprayed on the outside of the wear-resistant layer.

[0007] As a further embodiment of this invention, the plastic coating layer and the anti-corrosion layer are respectively a polyurethane coating and a polypropylene coating.

[0008] As a further embodiment of this invention, the impact-resistant layer is an RJ impact-resistant and wear-resistant coating or POM material.

[0009] As a further embodiment of this invention, the wear-resistant layer is an epoxy resin coating or a ceramic coating.

[0010] As a further embodiment of this utility model, lifting lugs are fixedly connected to both the top and bottom outer walls of the steel pipe body.

[0011] As a further embodiment of this utility model, flanges are fixedly connected to both ends of the steel pipe body.

[0012] As a further embodiment of this invention, a sealing ring is fixedly connected to the inner circumferential wall of the flange.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By combining the impact-resistant layer and the wear-resistant layer, this utility model not only gives the steel pipe body excellent impact resistance, but also makes the steel pipe body more wear-resistant, preventing the anti-corrosion layer of the steel pipe body from being easily damaged, which would lead to corrosion and damage to the steel pipe body, thus improving the durability of the device.

[0015] 2. By coating the inside of the steel pipe with a polyurethane coating, the steel pipe body has extremely high wear resistance, effectively resisting friction and scratches, and also has good chemical resistance and weather resistance.

[0016] 3. By coating the outside of the steel pipe body with a polypropylene coating, the polypropylene coating not only has good adhesion, which can adhere tightly to the surface of the steel pipe body and is not easy to fall off, but also has excellent chemical resistance, which can resist the erosion of various chemical media, protect the steel pipe from corrosion, and effectively prevent moisture penetration, protecting the outside of the steel pipe from corrosion. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front three-dimensional structure of a composite plastic-coated steel pipe with high impact resistance proposed in this utility model.

[0018] Figure 2 This is a partial cross-sectional view of a composite plastic-coated steel pipe with high impact resistance proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the overall cross-sectional structure of a composite plastic-coated steel pipe with high impact resistance proposed in this utility model.

[0020] In the diagram: 1. Flange; 2. Lifting lug; 3. Sealing ring; 4. Steel pipe body; 5. Impact-resistant layer; 6. Plastic coating layer; 7. Anti-corrosion layer; 8. Wear-resistant layer. Detailed Implementation

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Therefore, all other embodiments of this application described herein, and all embodiments obtained by those skilled in the art without creative effort based on the embodiments in this application, should fall within the scope of protection of this application.

[0022] Example 1

[0023] Reference Figures 1-3A composite plastic-coated steel pipe with high impact resistance includes a steel pipe body 4. The inner circumference of the steel pipe body 4 is coated with a plastic coating layer 6, which is a polyurethane coating. The polyurethane coating has extremely high wear resistance, effectively resisting friction and scratches, and also has good chemical resistance and weather resistance. The outer circumference of the steel pipe body 4 is coated with an anti-corrosion layer 7, which is a polypropylene coating. The polypropylene coating not only has good adhesion, adhering tightly to the surface of the steel pipe and not easily peeling off, but also has excellent resistance to chemical media, resisting the erosion of various chemical media, protecting the steel pipe from corrosion, and effectively preventing moisture penetration, protecting the exterior of the steel pipe from corrosion. The outer side of the corrosion layer 7 is coated with a wear-resistant layer 8, which is an epoxy resin coating. The epoxy resin coating can not only form a dense protective layer to isolate moisture, oxygen and other harmful substances and effectively prevent corrosion of the steel pipe body 4, but also has high hardness and toughness and good resistance to acid, alkali and organic solvents, so that the steel pipe body 4 can remain stable in various harsh environments. The outer side of the wear-resistant layer 8 is coated with an impact-resistant layer 5, which is an RJ impact-resistant wear-resistant coating. The RJ impact-resistant wear-resistant coating has excellent impact resistance, can withstand the scouring and wear of large particles, and has high adhesion strength, with excellent bonding strength with the metal substrate.

[0024] In this utility model, it should be noted that the top outer wall and bottom outer wall of the steel pipe body 4 are both welded with lifting lugs 2, and both ends of the steel pipe body 4 are welded with flanges 1, and the inner circumference of the flanges 1 is bonded with sealing rings 3.

[0025] Working Principle: When a high-impact-resistant composite plastic-coated steel pipe is required, the interior of the steel pipe body 4 is coated with a polyurethane coating, which has extremely high wear resistance, effectively resisting friction and scratches, and also has good chemical resistance and weather resistance. The exterior of the steel pipe body 4 is coated with a polypropylene coating. The polypropylene coating not only has good adhesion, adhering tightly to the surface of the steel pipe body 4 and not easily peeling off, but also has excellent chemical resistance, resisting the erosion of various chemical media, protecting the steel pipe from corrosion, and effectively preventing moisture penetration, protecting the exterior of the steel pipe from corrosion. The epoxy resin coating forms a dense protective layer, isolating moisture, oxygen, and other harmful substances, effectively preventing corrosion of the steel pipe body 4. It also has high hardness and toughness, as well as good resistance to acids, alkalis, and organic solvents, enabling the steel pipe body 4 to remain stable in various harsh environments. The excellent impact resistance of the RJ impact-resistant and wear-resistant coating allows the steel pipe body 4 to withstand the scouring and abrasion of large particles, exhibiting excellent impact resistance and high adhesion strength, with excellent bonding strength to the metal substrate.

[0026] Example 2

[0027] Reference Figures 1-3A composite plastic-coated steel pipe with high impact resistance includes a steel pipe body 4, a plastic coating layer 6 on the inner circumference of the steel pipe body 4, an anti-corrosion layer 7 on the outer circumference of the steel pipe body 4, a wear-resistant layer 8 sprayed on the outer side of the anti-corrosion layer 7, and an impact-resistant layer 5 sprayed on the outer side of the wear-resistant layer 8.

[0028] In this invention, it should be noted that the plastic coating layer 6 and the anti-corrosion layer 7 are respectively a polyurethane coating and a polypropylene coating. The polyurethane coating has extremely high wear resistance, effectively resisting friction and scratches, and also has good chemical resistance and weather resistance. The polypropylene coating not only has good adhesion, adhering tightly to the surface of the steel pipe and not easily peeling off, but also has excellent resistance to chemical media, resisting the erosion of various chemical media, protecting the steel pipe from corrosion, and effectively preventing moisture penetration, protecting the exterior of the steel pipe from corrosion. The impact-resistant layer 5 is made of POM material, which has high crystallinity. It has high tensile strength, fatigue strength and stiffness, and excellent wear resistance and fatigue resistance. It can maintain stable performance during long-term use. The wear-resistant layer 8 is a ceramic coating. The ceramic coating can not only withstand extremely high temperatures, but also has strong corrosion resistance, making it suitable for protection in chemical environments. It also has high hardness and can resist wear and impact. The top and bottom outer walls of the steel pipe body 4 are welded with lifting lugs 2, and the two ends of the steel pipe body 4 are welded with flanges 1. The inner circumference of the flange 1 is bonded with a sealing ring 3, which makes the connection between the steel pipe bodies 4 tighter.

[0029] Working Principle: When a composite plastic-coated steel pipe with high impact resistance is required, a polyurethane coating is applied to the inside of the steel pipe body 4. This coating has extremely high wear resistance, effectively resisting friction and scratches, and also has good chemical resistance and weather resistance. The outside of the steel pipe body 4 is coated with a polypropylene coating. The polypropylene coating not only has good adhesion, adhering tightly to the surface of the steel pipe body 4 and not easily peeling off, but also has excellent chemical resistance, resisting the erosion of various chemical media, protecting the steel pipe from corrosion, and effectively preventing moisture penetration, protecting the exterior of the steel pipe from corrosion. By incorporating POM material, the tensile strength, fatigue strength, and stiffness of the steel pipe body 4 are very high, and it also has excellent wear resistance and fatigue resistance, enabling the steel pipe body 4 to maintain stable performance during long-term use. By incorporating a ceramic coating as the wear-resistant layer 8, the steel pipe body 4 can not only withstand extremely high temperatures, but also has strong corrosion resistance, making it suitable for protection in chemical environments, and also has high hardness, resisting wear and impact.

[0030] This utility model has been described through the above embodiments. Those skilled in the art will understand that this utility model is not limited to the above embodiments. Many more modifications can be made based on the teachings of this utility model, and all such modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite plastic-coated steel pipe with high impact resistance, comprising a steel pipe body (4), wherein the inner circumferential wall of the steel pipe body (4) is coated with a plastic coating layer (6), characterized in that, The outer circumferential wall of the steel pipe body (4) is coated with an anti-corrosion layer (7), and a wear-resistant layer (8) is sprayed on the outside of the anti-corrosion layer (7), and an impact-resistant layer (5) is sprayed on the outside of the wear-resistant layer (8).

2. The impact-resistant composite plastic-coated steel pipe according to claim 1, characterized in that, The plastic coating (6) and the anti-corrosion layer (7) are respectively a polyurethane coating and a polypropylene coating.

3. The impact-resistant composite plastic-coated steel pipe according to claim 1, characterized in that, The impact-resistant layer (5) is an RJ impact-resistant and wear-resistant coating or POM material.

4. The impact-resistant composite plastic-coated steel pipe according to claim 1, characterized in that, The wear-resistant layer (8) is an epoxy resin coating or a ceramic coating.

5. The impact-resistant composite plastic-coated steel pipe according to claim 1, characterized in that, The top and bottom outer walls of the steel pipe body (4) are fixedly connected with lifting lugs (2).

6. The impact-resistant composite plastic-coated steel pipe according to claim 1, characterized in that, Flanges (1) are fixedly connected to both ends of the steel pipe body (4).

7. The impact-resistant composite plastic-coated steel pipe according to claim 6, characterized in that, A sealing ring (3) is fixedly connected to the inner circumference of the flange (1).

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