O-shaped double-rubber-ring large-diameter plastic-coated composite steel pipe

Abstract

The utility model relates to the technical field of composite steel pipes, and discloses an O-shaped double-rubber-ring large-caliber plastic-coated composite steel pipe which comprises a steel pipe, an isolation buffer layer and an anti-corrosion layer, the isolation buffer layer is fixedly arranged on the outer side of the anti-corrosion layer in a sleeved mode, and the steel pipe is fixedly arranged on the outer side of the isolation buffer layer in a sleeved mode. The inner walls of the two ends of the anti-corrosion layer are fixedly connected with O-shaped sealing rings correspondingly. When the two composite steel pipes provided by the utility model are in butt joint, the O-shaped sealing ring has excellent weather resistance, oil resistance and sealing performance, and when a pipeline connecting part is extruded, the O-shaped sealing ring elastically deforms and tightly fills a gap at a pipeline joint, so that fluid is prevented from leaking from the joint, and the sealing performance of a pipeline system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of composite steel pipe technology, and in particular to a large-diameter plastic-coated composite steel pipe with O-ring double rubber rings. Background Technology

[0002] Composite steel pipes are pipes made by combining two or more different materials through a specific process. They combine the advantages of different materials, including the high strength of steel pipes and the corrosion resistance and wear resistance of plastic coatings. They are widely used in construction, chemical, petroleum, water treatment and other fields.

[0003] In the existing technology, during the use of composite steel pipes, the lack of stable sealing connection treatment at the connection points at both ends of the steel pipe will affect the tightness of the connection between the steel pipe end and the connector, thus affecting the subsequent use of the composite steel pipe. Summary of the Invention

[0004] The purpose of this utility model is to solve the problem that in the use of composite steel pipes, the lack of stable sealing connection treatment at the connection between the two ends of the steel pipe affects the tightness of the connection between the end of the steel pipe and the connector, thus affecting the subsequent use of the composite steel pipe. Therefore, this utility model proposes an O-ring double rubber ring large-diameter plastic-coated composite steel pipe.

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

[0006] A large-diameter plastic-coated composite steel pipe with O-ring double rubber rings includes a steel pipe, an isolation buffer layer, and an anti-corrosion layer. The isolation buffer layer is fixedly sleeved on the outside of the anti-corrosion layer, and the steel pipe is fixedly sleeved on the outside of the isolation buffer layer. O-rings are fixedly connected to the inner walls of both ends of the anti-corrosion layer.

[0007] Preferably, the isolation buffer layer is made of epoxy resin coating.

[0008] Preferably, the anti-corrosion layer is made of polyethylene coating.

[0009] Preferably, the O-ring is made of neoprene rubber.

[0010] Preferably, the inner wall of the O-ring is fixedly connected with multiple anti-slip rubber particles.

[0011] Preferably, the two ends of the steel pipe are respectively provided with chamfers.

[0012] Compared with the prior art, this utility model provides a large-diameter plastic-coated composite steel pipe with O-ring double rubber rings, which has the following beneficial effects:

[0013] 1. This O-ring double rubber ring large-diameter plastic-coated composite steel pipe, when connected by two composite steel pipes, the O-ring has excellent weather resistance, oil resistance and sealing performance. When the pipe connection is squeezed, it undergoes elastic deformation, tightly filling the gap at the pipe joint, preventing fluid from leaking from the joint, and ensuring the sealing performance of the pipeline system.

[0014] 2. This O-ring double rubber ring large-diameter plastic-coated composite steel pipe uses steel pipe as the main structural body of the composite steel pipe to ensure the structural strength of the composite steel pipe. The anti-corrosion layer is made of polyethylene plastic coating. Polyethylene has good chemical stability and extends the service life of the pipe. The isolation buffer layer is made of epoxy resin plastic coating. Epoxy resin material has high hardness and good toughness, which can absorb some energy and buffer the direct action of external forces on the steel pipe, reducing the deformation or damage of the steel pipe caused by external forces.

[0015] 3. This large-diameter plastic-coated composite steel pipe with double O-rings increases the friction between the O-ring and the inner wall of the pipe through multiple anti-slip rubber particles on the inner wall of the O-ring. Under the action of fluid pressure inside the pipe, the anti-slip rubber particles tightly adhere to the inner wall of the pipe, preventing the O-ring from sliding and shifting inside the pipe, further enhancing the sealing effect and avoiding leakage problems caused by the displacement of the O-ring. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a large-diameter plastic-coated composite steel pipe with O-ring double rubber rings proposed in this utility model;

[0017] Figure 2 A partial structural cross-sectional view of a large-diameter plastic-coated composite steel pipe with O-ring double rubber rings proposed in this utility model;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle section.

[0019] In the diagram: 1. Steel pipe, 2. Isolation buffer layer, 3. Anti-corrosion layer, 4. O-ring seal, 5. Anti-slip rubber granules. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A large-diameter plastic-coated composite steel pipe with O-ring double rubber rings includes a steel pipe 1, an isolation buffer layer 2 and an anti-corrosion layer 3. The isolation buffer layer 2 is fixedly sleeved on the outside of the anti-corrosion layer 3, and the steel pipe 1 is fixedly sleeved on the outside of the isolation buffer layer 2. O-rings 4 are fixedly connected to the inner walls of both ends of the anti-corrosion layer 3.

[0022] The isolation buffer layer 2 is made of epoxy resin coating, the anti-corrosion layer 3 is made of polyethylene coating, and the O-ring 4 is made of neoprene rubber.

[0023] The inner wall of the O-ring 4 is fixedly connected with multiple anti-slip rubber particles 5, and the two ends of the steel pipe 1 are respectively provided with chamfers.

[0024] Steel pipe 1, as the main structural component of the composite steel pipe, ensures the structural strength of the composite steel pipe. The anti-corrosion layer 3 is made of polyethylene coating. Polyethylene has good chemical stability and can effectively resist the corrosion of chemicals such as acids, alkalis, and salts. In scenarios such as underground water transportation and chemical fluid transportation, the anti-corrosion layer 3 isolates steel pipe 1 from external corrosive media, preventing steel pipe 1 from rusting and corroding, and extending the service life of the pipeline. The isolation buffer layer 2 is made of epoxy resin coating. Epoxy resin material has high hardness and good toughness. On the one hand, it can further isolate the external environment from the wear and damage of the anti-corrosion layer 3, protecting the integrity of the anti-corrosion layer 3. On the other hand, when the pipeline is subjected to external impact or vibration, the isolation buffer layer 2 can absorb some energy, buffer the direct action of external force on steel pipe 1, and reduce the deformation or damage of steel pipe 1 caused by external force.

[0025] During pipe connection, a bearing-type connection is used. The pipe connection section is inserted into the inner wall of the pipe and fixed. The O-ring 4 of the two composite steel pipes is made of neoprene rubber. Neoprene rubber has excellent weather resistance, oil resistance, and sealing performance. When the pipe connection is compressed, the O-ring 4 undergoes elastic deformation, tightly filling the gap at the pipe joint and preventing fluid leakage, thus ensuring the sealing of the pipe system. Multiple anti-slip rubber particles 5 on the inner wall of the O-ring 4 increase the friction with the inner wall of the pipe. Under the pressure of the fluid inside the pipe, the anti-slip rubber particles 5 adhere tightly to the inner wall of the pipe. The surface of the granules 5 is rough and elastic. When there is fluid pressure inside the pipe, the fluid pressure will generate a thrust along the pipe axis on the sealing ring 4, which may cause the sealing ring to slide and shift towards the end with lower pressure, thereby destroying the sealing effect. The anti-slip rubber granules 5 are designed with a raised structure to form a microscopic "bite" with the pipe wall of the connecting pipe, increasing the sliding resistance. Without affecting the sealing effect, it can provide a certain support and stability effect when the sealing ring 4 is subjected to thrust, ensuring that the sealing ring 4 remains in a fixed position, preventing the O-ring sealing ring 4 from sliding and shifting in the pipe, further enhancing the sealing effect, and avoiding leakage problems caused by the displacement of the sealing ring.

[0026] The chamfered design at both ends of steel pipe 1 serves as a guide during pipe connection, making it easier to align and insert the two pipes, reducing installation difficulty and improving construction efficiency. At the same time, the chamfer reduces stress concentration at the pipe connection, enhances the structural strength of the connection, and makes the pipeline system more stable.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A large-diameter plastic-coated composite steel pipe with O-ring double rubber rings, comprising a steel pipe (1), an isolation buffer layer (2), and an anti-corrosion layer (3), characterized in that: The isolation buffer layer (2) is fixedly sleeved on the outside of the anti-corrosion layer (3), the steel pipe (1) is fixedly sleeved on the outside of the isolation buffer layer (2), and O-rings (4) are fixedly connected to the inner walls of both ends of the anti-corrosion layer (3).

2. The O-ring double rubber ring large-diameter plastic-coated composite steel pipe according to claim 1, characterized in that: The isolation buffer layer (2) is made of epoxy resin coating.

3. The O-ring double rubber ring large-diameter plastic-coated composite steel pipe according to claim 1, characterized in that: The anti-corrosion layer (3) is made of polyethylene coating.

4. The O-ring double rubber ring large-diameter plastic-coated composite steel pipe according to claim 1, characterized in that: The O-ring (4) is made of chloroprene rubber.

5. The O-ring double rubber ring large-diameter plastic-coated composite steel pipe according to claim 1, characterized in that: The inner wall of the O-ring (4) is fixedly connected with multiple anti-slip rubber particles (5).

6. The O-ring double rubber ring large-diameter plastic-coated composite steel pipe according to claim 1, characterized in that: The steel pipe (1) has chamfered angles at both ends.

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