A composite reinforced flexible polyethylene composite pipe

Abstract

This utility model discloses a composite reinforced flexible polyethylene composite pipe, relating to the field of composite pipes. It includes an outer polyethylene pipe and an inner polyethylene pipe, with the inner pipe located inside the outer polyethylene pipe. Multiple skeleton structures are fixedly installed between the outer and inner polyethylene pipes, and connecting rings are provided between each skeleton structure. This utility model can form a radially uniformly distributed rigid support, effectively suppressing radial deformation of the pipe. The steel frame plates are movably connected by flexible connecting frames, allowing the steel frame plates to deform collaboratively when the pipe bends. While ensuring the strength of the rigid support, it also improves the bending deformation capacity of the composite pipe. It allows the skeleton to slip slightly axially when the pipe is under pressure, dispersing local stress and avoiding brittle fracture. While increasing the support rigidity of the steel frame plates, it also allows the composite pipe to undergo local torsion, enabling the polyethylene composite pipe to form a dynamic balance mechanism between controllable deformation and rigid support.

Description

Technical Field

[0001] This utility model relates to the field of composite pipes, and in particular to a composite reinforced flexible polyethylene composite pipe. Background Technology

[0002] Polyethylene composite pipe is a functional pipe made by plasticizing high-density and low-density polyethylene resins separately with two extruders and then melting them together with a composite mold. It combines the pressure resistance of high-density polyethylene with the corrosion resistance of low-density polyethylene and is widely used in industrial fields such as oil and gas transportation and mine ventilation.

[0003] However, when using composite pipes, existing composite pipes often employ continuous steel strip spiral winding or an integral metal mesh structure for internal reinforcement to enhance their rigidity. These structures are prone to radial deformation during high-pressure transportation, especially in geological subsidence areas where excessive ellipticity is likely to occur. Although axial strength is improved, this results in redundant pipe bending stiffness. Furthermore, after adding metal reinforcement inside the pipe, the pipe's flexible bending capacity is significantly reduced, failing to achieve a dynamic balance between controllable deformation and rigid support. This makes it unsuitable for adapting to terrain undulations, especially under combined high-pressure transportation and geological changes, where excessive deformation, joint leakage, and brittle fracture are common failure risks, severely restricting its application in demanding scenarios such as long-distance oil transportation and mining slurry transportation. Utility Model Content

[0004] The main objective of this invention is to provide a composite reinforced flexible polyethylene composite pipe, which can effectively solve the technical problems mentioned in the background art.

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

[0006] A composite reinforced flexible polyethylene composite pipe includes a polyethylene outer pipe and a polyethylene inner pipe. The polyethylene inner pipe is located inside the polyethylene outer pipe. Multiple skeleton structures are fixedly installed between the polyethylene outer pipe and the polyethylene inner pipe. Each of the multiple skeleton structures is provided with a docking ring. The upper and lower ends of the docking rings are provided with docking slots. A support grid is fixedly installed between two docking rings.

[0007] As a further embodiment of this utility model, the skeleton structure includes steel frame plates, steel mesh channels, and flexible connecting frames. Multiple steel frame plates are fixedly installed between the polyethylene outer tube and the polyethylene inner tube, multiple steel mesh channels are opened on the inner side of the steel frame plates, and multiple flexible connecting frames are fixedly installed between the multiple steel frame plates.

[0008] As a further embodiment of this utility model, the polyethylene outer tube and the polyethylene inner tube are integrally formed and connected through the steel plate mesh groove, and multiple steel frame plates are arranged in a circle around the center of the polyethylene outer tube and the polyethylene inner tube.

[0009] As a further embodiment of this utility model, the docking ring and the supporting mesh frame are located between and fixedly connected to the polyethylene outer tube and the polyethylene inner tube, and the steel frame plate is inserted into the docking slots at the top and bottom of the docking ring for movable connection.

[0010] As a further embodiment of this utility model, a pipe joint is fixedly installed at the lower end of the polyethylene outer pipe and the polyethylene inner pipe, and the interior of the pipe joint is connected to the interior of the polyethylene inner pipe.

[0011] Compared with existing technologies, this utility model has the following advantages: It constitutes a ring-shaped skeleton support system, with multiple steel frame plates arranged in a ring around the center of the pipe body, forming a radially uniformly distributed rigid support, which effectively suppresses radial deformation of the pipe. The steel frame plates are movably connected by flexible connecting frames, allowing the steel frame plates to deform in tandem when the pipe bends. While ensuring the strength of the rigid support, it also improves the bending deformation capacity of the composite pipe. Furthermore, the movable connection design of the steel frame plates inserting into the butt ring groove allows the skeleton to slide slightly along the axial direction when the pipe is under pressure, dispersing local stress and avoiding brittle fracture. At the same time, it retains some of the settings of traditional support grids. While increasing the support rigidity of the steel frame plates, it also allows the composite pipe to undergo local torsion, further improving the flexible bending capacity of the composite pipe. This enables the polyethylene composite pipe to form a dynamic balance mechanism between controllable deformation and rigid support, solving the industry problem of easy deformation and leakage of traditional composite pipes under high pressure and bending conditions, and making it more suitable for the use of composite pipes in different occasions. Attached Figure Description

[0012] Figure 1 This is an overall structural diagram of a composite reinforced flexible polyethylene composite pipe according to the present invention;

[0013] Figure 2 This is an enlarged view of the steel frame plate and the butt ring in a composite reinforced flexible polyethylene composite pipe according to this utility model;

[0014] Figure 3 This is an enlarged view of the steel frame plate in a composite reinforced flexible polyethylene composite pipe according to this utility model;

[0015] Figure 4 This is an enlarged view of the butt ring in a composite reinforced flexible polyethylene composite pipe according to this utility model.

[0016] In the diagram: 1. Polyethylene outer pipe; 2. Polyethylene inner pipe; 3. Skeleton structure; 4. Steel frame plate; 5. Steel plate mesh channel; 6. Flexible connecting frame; 7. Butt ring; 8. Butt groove; 9. Supporting mesh frame; 10. Pipe joint. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] like Figures 1-4 As shown, a composite reinforced flexible polyethylene composite pipe is described; please refer to it carefully. Figures 1-4 It includes a polyethylene outer tube 1 and a polyethylene inner tube 2. The polyethylene inner tube 2 is located inside the polyethylene outer tube 1. Multiple skeleton structures 3 are fixedly installed between the polyethylene outer tube 1 and the polyethylene inner tube 2. A docking ring 7 is provided between the multiple skeleton structures 3. The upper and lower ends of the docking ring 7 are provided with docking slots 8. A support grid 9 is fixedly installed between two docking rings 7.

[0019] Please refer to this carefully. Figure 2 and Figure 3 The skeleton structure 3 includes steel frame plates 4, steel plate mesh channels 5 and flexible connecting frames 6. Multiple steel frame plates 4 are fixedly installed between the polyethylene outer tube 1 and the polyethylene inner tube 2. Multiple steel plate mesh channels 5 are opened on the inner side of the steel frame plates 4. Multiple flexible connecting frames 6 are fixedly installed between the multiple steel frame plates 4.

[0020] Please refer to this carefully. Figure 2 and Figure 3 The polyethylene outer tube 1 and the polyethylene inner tube 2 are integrally formed and connected through the steel plate mesh trough 5, and multiple steel frame plates 4 are arranged in a circle around the center of the polyethylene outer tube 1 and the polyethylene inner tube 2.

[0021] Specifically, the polyethylene outer tube 1 and the polyethylene inner tube 2 are the main structural parts of the composite pipe. The polyethylene outer tube 1 and the polyethylene inner tube 2 are connected in the steel plate mesh groove 5. The steel frame plate 4 is used to support and reinforce the polyethylene outer tube 1 and the polyethylene inner tube 2. When the polyethylene outer tube 1 and the polyethylene inner tube 2 are bent, the flexible connecting frame 6 between the multiple steel frame plates 4 bends accordingly, so that the multiple steel frame plates 4 can move to cooperate with the bending of the polyethylene outer tube 1 and the polyethylene inner tube 2.

[0022] Please refer to this carefully. Figure 2 and Figure 4 The docking ring 7 and the supporting grid 9 are located between the polyethylene outer tube 1 and the polyethylene inner tube 2 and are fixedly connected to them. The steel frame plate 4 is inserted into the docking slots 8 at the top and bottom of the docking ring 7 for movable connection.

[0023] Specifically, the docking ring 7 plays the role of movable installation of the steel frame plate 4 through the docking slot 8, so that the steel frame plate 4 can move and maintain connection within the docking slot 8 when it moves. At the same time, part of the support grid 9 is retained, so that when the polyethylene outer pipe 1 and the polyethylene inner pipe 2 are twisted, the support grid 9 twists accordingly to cooperate with the overall twisting of the composite pipe.

[0024] Please refer to this carefully. Figure 1 A pipe joint 10 is fixedly installed at the lower end of the polyethylene outer pipe 1 and the polyethylene inner pipe 2, and the interior of the pipe joint 10 is connected to the interior of the polyethylene inner pipe 2.

[0025] Specifically, when multiple composite pipes are connected, they are installed by connecting them through pipe joint 10.

[0026] 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 illustrative of the principles of this 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite reinforced flexible polyethylene composite pipe comprising a polyethylene outer pipe (1) and a polyethylene inner pipe (2) located inside the polyethylene outer pipe (1), characterized in that: Multiple skeleton structures (3) are fixedly installed between the polyethylene outer tube (1) and the polyethylene inner tube (2). A docking ring (7) is provided between each of the multiple skeleton structures (3). A docking slot (8) is provided at the upper and lower ends of the docking ring (7). A support grid (9) is fixedly installed between two docking rings (7).

2. A composite reinforced flexible polyethylene composite pipe according to claim 1, characterized in that: The skeleton structure (3) includes steel frame plates (4), steel plate mesh channels (5) and flexible connecting frames (6). Multiple steel frame plates (4) are fixedly installed between the polyethylene outer tube (1) and the polyethylene inner tube (2). Multiple steel plate mesh channels (5) are opened on the inner side of the steel frame plates (4). Multiple flexible connecting frames (6) are fixedly installed between the multiple steel frame plates (4).

3. A composite reinforced flexible polyethylene composite pipe according to claim 2, characterized in that: The polyethylene outer tube (1) and the polyethylene inner tube (2) are integrally formed and connected through the steel plate mesh groove (5), and multiple steel frame plates (4) are arranged in a circle around the center of the polyethylene outer tube (1) and the polyethylene inner tube (2).

4. The composite reinforced flexible polyethylene composite pipe according to claim 2, wherein: The docking ring (7) and the support frame (9) are located between the polyethylene outer tube (1) and the polyethylene inner tube (2) and are fixedly connected thereto. The steel frame plate (4) is inserted into the docking slots (8) at the top and bottom of the docking ring (7) for movable connection.

5. The composite reinforced flexible polyethylene composite pipe according to claim 1, wherein: The lower ends of the polyethylene outer tube (1) and the polyethylene inner tube (2) are fixedly installed with pipe joints (10), and the interior of the pipe joints (10) is connected to the interior of the polyethylene inner tube (2).

Images