Corrosion-resistant water supply pipe lining

Abstract

This utility model discloses an anti-corrosion water supply pipeline lining, including a pipe body with connecting ends at both ends. The outer surface of the pipe body is coated with an external anti-corrosion layer, and the inside of the pipe body is provided with an anti-corrosion lining. Two threaded connection grooves are formed on the inner circumference of the pipe body, and sealing bushings are threaded onto the inner walls of both grooves. The anti-corrosion lining comprises an epoxy resin coating, a glass fiber reinforced plastic layer, and a food-grade polyethylene layer. This utility model, through the external anti-corrosion layer on the pipe body surface, can resist corrosion from soil and the external environment, extending the overall service life of the pipeline. The anti-corrosion lining, composed of an epoxy resin coating, a glass fiber reinforced plastic layer, and a food-grade polyethylene layer, ensures the anti-corrosion effect of the pipeline inner wall compared to traditional single-coat or thin lining materials. Furthermore, when the anti-corrosion lining is damaged, the old anti-corrosion lining can be easily removed, allowing for flexible replacement of the internal anti-corrosion lining of the pipe body.

Description

Technical Field

[0001] This utility model relates to the field of water supply pipelines, and in particular to corrosion-resistant water supply pipeline linings. Background Technology

[0002] Water supply pipelines are a core component of urban water supply and drainage systems, playing a vital role in delivering water to residents, industrial production, and public facilities. Their materials include metals such as steel pipes, cast iron pipes, and composite pipes, while the corrosion resistance of the inner lining structure directly determines the service life of the pipeline and the safety of water delivery.

[0003] Currently, the lining structure of water supply pipelines mostly uses a single coating or thin lining material, which is difficult to adapt to complex corrosive environments. In addition, traditional linings are mostly fixedly connected to the pipeline body, and when the lining is damaged and replaced, the entire pipeline needs to be replaced, which increases the water supply cost. To address these issues, we propose an anti-corrosion water supply pipeline lining. Utility Model Content

[0004] The purpose of this invention is to provide a corrosion-resistant water supply pipe lining to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The anti-corrosion water supply pipe lining includes a pipe body with connecting ends at both ends. The outer surface of the pipe body is coated with an external anti-corrosion layer, and the inside of the pipe body is provided with an anti-corrosion lining. The inner ring of the pipe body has two threaded connection grooves, and the inner walls of the two threaded connection grooves are threaded with sealing bushings. The anti-corrosion lining includes an epoxy resin coating, a glass fiber reinforced plastic layer, and a food-grade polyethylene layer.

[0007] In a further embodiment, the inner ring of the epoxy resin coating is fixedly connected to the outer surface of the glass fiber reinforced plastic layer, and the inner ring of the glass fiber reinforced plastic layer is fixedly connected to the outer surface of the food-grade polyethylene layer.

[0008] In a further embodiment, each of the two threaded connection grooves is provided with annular sealing gaskets, and the ends of the two sealing bushings that are close to each other are in contact with the sides of the two annular sealing gaskets that are far from each other.

[0009] In a further embodiment, a plurality of connecting holes are provided on the side of the two connecting ends that are far apart from each other, and an annular groove is provided on the side of the two connecting ends that are far apart from each other.

[0010] In a further embodiment, the outer surfaces of both sealing bushings are in contact with the inner ring of the anti-corrosion liner, the outer surface of the anti-corrosion liner is in contact with the inner ring of the pipe body, and multiple disassembly grooves are provided on the outer surfaces of both sealing bushings.

[0011] In a further embodiment, the annular sealing gasket is made of nitrile rubber, and the thickness of the annular sealing gasket is 2-5mm.

[0012] In a further embodiment, the thickness of the outer anti-corrosion layer is 0.5-1.5 mm, and the outer anti-corrosion layer is made by spraying polyurethane anti-corrosion coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes an external anti-corrosion layer on the pipe surface to resist corrosion from soil and the external environment, extending the overall service life of the pipeline. The anti-corrosion lining is composed of an epoxy resin coating, a glass fiber reinforced plastic layer, and a food-grade polyethylene layer. Compared with traditional single coatings or thin lining materials, it ensures the anti-corrosion effect of the inner wall of the pipeline and also ensures the hygiene and safety of water supply. In addition, when the anti-corrosion lining is damaged, the sealing bushing can be rotated out from the threaded connection groove using the disassembly groove on the outer surface of the sealing bushing, making it easy to remove the old anti-corrosion lining. This allows for flexible replacement of the internal anti-corrosion lining of the pipe without replacing the entire water supply pipeline, reducing the cost of the water supply pipeline. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the inner lining of a corrosion-resistant water supply pipeline.

[0016] Figure 2 A frontal sectional view of the inner lining of a corrosion-resistant water supply pipe.

[0017] Figure 3 A schematic diagram showing the exploded structure of the pipe body and sealing bushing in the inner lining of a corrosion-resistant water supply pipeline.

[0018] Figure 4 A frontal sectional view of the anti-corrosion lining in the inner lining of a water supply pipeline.

[0019] Figure 5 For corrosion protection of water supply pipe lining Figure 2 A magnified structural diagram of part A in the middle.

[0020] In the diagram: 1. Pipe body; 2. Connecting end; 3. Outer anti-corrosion layer; 4. Threaded connection groove; 5. Sealing bushing; 6. Annular sealing gasket; 7. Anti-corrosion inner lining; 701. Epoxy resin coating; 702. Glass fiber reinforced plastic layer; 703. Food-grade polyethylene layer; 8. Connecting hole; 9. Disassembly groove; 10. Annular groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 In this utility model, the anti-corrosion water supply pipe lining includes a pipe body 1, with connecting ends 2 at both ends of the pipe body 1. The outer surface of the pipe body 1 is coated with an outer anti-corrosion layer 3, and the inside of the pipe body 1 is provided with an anti-corrosion lining 7. The inner ring of the pipe body 1 has two threaded connecting grooves 4, and the inner walls of the two threaded connecting grooves 4 are threaded with sealing bushings 5. The inner ring of the sealing bushings 5 ​​is made of food-grade polyethylene. The anti-corrosion lining 7 includes an epoxy resin coating 701, a glass fiber reinforced plastic layer 702, and a food-grade polyethylene layer 703. The epoxy resin coating 701 is mainly composed of epoxy resin and a curing agent. The epoxy resin has excellent adhesion and can adhere tightly to the inner wall of the pipe body 1 to form a solid protective barrier. The curing agent promotes the cross-linking reaction of the epoxy resin, improves the hardness and wear resistance of the coating, and enhances its anti-corrosion ability. The glass fiber reinforced plastic layer 702 uses glass fiber as the reinforcing material and thermosetting resin as the matrix. High-strength glass fiber and good chemical stability effectively enhance structural strength and resist the impact of water flow inside the pipe and external pressure. Thermosetting resin tightly bonds the glass fiber, allowing the two to work together and significantly improve the rigidity and durability of the pipe lining. The food-grade polyethylene layer 703 is made of polyethylene resin that meets food hygiene standards. Polyethylene has good chemical inertness, is resistant to acid and alkali corrosion, and will not react chemically with the drinking water being transported, ensuring water quality safety and meeting hygiene and health requirements. The outer anti-corrosion layer 3 can resist corrosion from soil and the external environment, extending the overall service life of the pipe. The anti-corrosion lining 7 is composed of an epoxy resin coating 701, a glass fiber reinforced plastic layer 702, and a food-grade polyethylene layer 703. Compared with traditional single coatings or thin lining materials, it ensures the anti-corrosion effect of the inner wall of the pipe and the hygiene and safety of water transportation.

[0023] In a further embodiment, the inner ring of the epoxy resin coating 701 is fixedly connected to the outer surface of the glass fiber reinforced plastic layer 702, and the inner ring of the glass fiber reinforced plastic layer 702 is fixedly connected to the outer surface of the food-grade polyethylene layer 703. Annular sealing gaskets 6 are provided inside both threaded connection grooves 4. The ends of the two sealing bushings 5 ​​that are close to each other contact the opposite sides of the two annular sealing gaskets 6. The annular sealing gaskets 6 are made of nitrile rubber and have a thickness of 2-5 mm. The tight connection between the epoxy resin coating 701, the glass fiber reinforced plastic layer 702, and the food-grade polyethylene layer 703 ensures the overall stability of the anti-corrosion lining 7. When the sealing bushing 5 is threadedly connected to the threaded connection groove 4, the end of the sealing bushing 5 presses against the annular sealing gasket 6, effectively enhancing the sealing performance of the pipe end and preventing leakage during water transport.

[0024] In a further embodiment, multiple connection holes 8 are provided on the side of the two connecting ends 2 that are far apart from each other, and annular grooves 10 are provided on the side of the two connecting ends 2 that are far apart from each other. The outer surfaces of the two sealing bushings 5 ​​are in contact with the inner ring of the anti-corrosion liner 7, and the outer surface of the anti-corrosion liner 7 is in contact with the inner ring of the pipe body 1. Multiple disassembly grooves 9 are provided on the outer surfaces of the two sealing bushings 5. The thickness of the outer anti-corrosion layer 3 is 0.5-1.5mm, and the outer anti-corrosion layer 3 is made of polyurethane anti-corrosion coating. Multiple connection holes 8 are used for bolt fixing connection between pipes. The annular grooves 10 can cooperate with the seal to improve the sealing performance of the pipe connection. Multiple disassembly grooves 9 can provide a force application point for tools, making it easy to rotate and operate the sealing bushings 5.

[0025] The working principle of this utility model is as follows: First, the pipe body 1 can resist the corrosion of soil or external environment through the outer anti-corrosion layer 3, while the inner anti-corrosion lining 7 is composed of epoxy resin coating 701, glass fiber reinforced plastic layer 702 and food-grade polyethylene layer 703, which can perform anti-corrosion treatment on the inner wall of the pipe body 1. When the lining needs to be replaced, it can be rotated out from the threaded connection groove 4 by using the disassembly groove 9 on the outer surface of the sealing bushing 5, which makes it easy to remove the old anti-corrosion lining 7, and then the anti-corrosion lining 7 inside the pipe body 1 can be flexibly replaced.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Corrosion-resistant water supply pipe lining, characterized in that: The tube includes a pipe body (1), with connecting ends (2) at both ends of the pipe body (1). The outer surface of the pipe body (1) is coated with an outer anti-corrosion layer (3). The inside of the pipe body (1) is provided with an anti-corrosion liner (7). The inner ring of the pipe body (1) has two threaded connection grooves (4). The inner walls of the two threaded connection grooves (4) are threaded with sealing bushings (5). The anti-corrosion liner (7) includes an epoxy resin coating (701), a glass fiber reinforced plastic layer (702), and a food-grade polyethylene layer (703).

2. The anti-corrosion water supply pipeline lining according to claim 1, characterized in that: The inner ring of the epoxy resin coating (701) is fixedly connected to the outer surface of the glass fiber reinforced plastic layer (702), and the inner ring of the glass fiber reinforced plastic layer (702) is fixedly connected to the outer surface of the food-grade polyethylene layer (703).

3. The anti-corrosion water supply pipeline lining according to claim 1, characterized in that: Both of the threaded connection grooves (4) are provided with annular sealing gaskets (6), and the two sealing bushings (5) are respectively in contact with the two annular sealing gaskets (6) on opposite sides.

4. The anti-corrosion water supply pipeline lining according to claim 1, characterized in that: Multiple connecting holes (8) are provided on the side of the two connecting ends (2) that are far apart from each other, and an annular groove (10) is provided on the side of the two connecting ends (2) that are far apart from each other.

5. The anti-corrosion water supply pipeline lining according to claim 1, characterized in that: The outer surfaces of both sealing bushings (5) are in contact with the inner ring of the anti-corrosion liner (7), and the outer surface of the anti-corrosion liner (7) is in contact with the inner ring of the pipe body (1). Multiple disassembly grooves (9) are provided on the outer surfaces of both sealing bushings (5).

6. The anti-corrosion water supply pipeline lining according to claim 3, characterized in that: The annular sealing gasket (6) is made of nitrile rubber and has a thickness of 2-5 mm.

7. The anti-corrosion water supply pipeline lining according to claim 1, characterized in that: The thickness of the outer anti-corrosion layer (3) is 0.5-1.5 mm, and the outer anti-corrosion layer (3) is made by spraying polyurethane anti-corrosion coating.

Images