High-flexibility PE pipe

Abstract

The utility model discloses a high-flexibility PE pipe which comprises an inner core pipe, annular supporting ribs are embedded in the outer wall of the inner core pipe at equal intervals in the axial direction, elastic supporting layers are arranged on the outer wall of the inner core pipe at equal intervals in the axial direction, an outer core pipe is wrapped outside the inner core pipe and the elastic supporting layers, and a mesh belt layer is wrapped on the surface of the outer core pipe. An outer sheath is arranged outside the mesh belt layer, and reinforcing straight ribs parallel to the central axis are arranged on the outer wall of the outer sheath at equal intervals in the circumferential direction. According to the utility model, the annular supporting ribs are additionally arranged in the inner core tube, the effect of radially supporting the inner core tube and the elastic supporting layer is directly achieved, the strength and flexibility of the internal supporting structure are enhanced, in addition, the mesh belt layer and the outer core tube are additionally arranged between the elastic supporting layer and the outer sheath, and the mesh belt layer is mutually pulled and restrained by fibers in the axial direction and the circumferential direction, so that the tensile strength of the cable is improved. The effects of preventing deformation and promoting recovery after deformation are achieved, and the flexibility of the pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply and drainage pipes, in particular to a highly flexible PE pipe. Background Art

[0002] PE (Polyethylene) pipes are commonly used water supply and drainage pipes, which are divided into medium-density polyethylene pipes and high-density polyethylene pipes. According to different usage scenarios, PE pipes have different specifications and models. At present, most of the common PE pipes on the market have similar materials and layer structures, mostly one to three-layer structures. PE pipes with different specifications and diameters only have different wall thicknesses. Among them, for PE pipes with smaller diameters, the one to three-layer structures can fully ensure the structural strength and flexibility. However, as the diameter size increases, simply increasing the wall thickness is difficult to achieve the structural and flexible strength of radial support, the pressure-bearing effect weakens, it is easy to deform under pressure, and the recovery effect after deformation is poor, which has deficiencies. Content of the Utility Model

[0003] Aiming at the deficiencies existing in the prior art, the utility model provides a highly flexible PE pipe, which is used to solve the problem that the radial support structure and flexible strength of common large-diameter PE pipes on the market are relatively insufficient.

[0004] To solve the above technical problems, the utility model provides the following technical solutions:

[0005] A highly flexible PE pipe includes an inner core pipe. Ring-shaped support ribs are axially and equidistantly inlaid on the outer wall of the inner core pipe. An elastic support layer is axially and equidistantly arranged on the outer wall of the inner core pipe. An outer core pipe is wrapped outside the inner core pipe and the elastic support layer. A mesh belt layer is wrapped on the surface of the outer core pipe. An outer sheath is arranged outside the mesh belt layer. Strengthening straight ribs parallel to the central axis are axially and equidistantly arranged on the outer wall of the outer sheath.

[0006] Preferably, the ring-shaped support ribs are coaxially arranged with the inner core pipe, and the ring-shaped support ribs are circular or regular polygons with more than five sides.

[0007] Preferably, the ring-shaped support ribs are spring support ribs arranged on the cross-section of the inner core pipe, and the elastic support layer is a spring sheet welded pipe.

[0008] Preferably, the inner wall of the elastic support layer corresponding to the position of the ring-shaped support ribs supports the outer wall of the ring-shaped support ribs.

[0009] Preferably, the mesh belt layer is a continuous cross-fiber braided layer.

[0010] Preferably, four to six strengthening straight ribs are provided, and the strengthening straight ribs and the outer sheath are of an integral structure.

[0011] Preferably, the inner core pipe, the outer core pipe, and the outer sheath are all polyethylene pipes.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] On the basis of increasing the wall thickness of the inner core pipe, the outer core pipe, and the outer sheath, the utility model additionally provides annular support ribs inside the inner core pipe, which directly play a role in radially supporting the inner core pipe and the elastic support layer, enhancing the strength and flexibility of the internal support structure. In addition, a mesh belt layer and an outer core pipe are added between the elastic support layer and the outer sheath. The mesh belt layer is formed by fibers pulling and restraining each other axially and circumferentially, which can prevent deformation and promote recovery after deformation, improving the flexibility of the pipe, effectively enhancing the radial support structure strength and flexibility of the large-diameter PE pipe, and improving the pressure-bearing effect and the deformation structure recovery effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 is a cross-sectional view of the corresponding position of the annular support ribs of the utility model.

[0016] In the figure: 1, inner core pipe; 2, elastic support layer; 3, outer sheath; 4, annular support ribs; 5, outer core pipe; 6, mesh belt layer; 7, reinforcing straight ribs. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] As Figure 1-2 shown, the present utility model provides a technical solution: a highly flexible PE pipe, including an inner core pipe 1, on the outer wall of which annular support ribs 4 are equidistantly inlaid axially. The annular support ribs 4 are spring support ribs arranged on the cross-section of the inner core pipe 1. The annular support ribs 4 are coaxially arranged with the inner core pipe 1, and the annular support ribs 4 are circular or regular polygons with more than five sides.

[0019] On the outer wall of the inner core pipe 1, an elastic support layer 2 is equidistantly arranged axially. The elastic support layer 2 is a spring sheet welded pipe. The inner wall of the elastic support layer 2 corresponding to the position of the annular support ribs 4 mutually supports the outer wall of the annular support ribs 4. The outer core pipe 5 is covered on the outside of the inner core pipe 1 and the elastic support layer 2. A mesh belt layer 6 is covered on the surface of the outer core pipe 5. The mesh belt layer 6 is a continuous cross-fiber woven layer.

[0020] An outer sheath 3 is provided outside the mesh belt layer 6. The inner core tube 1, the outer core tube 5 and the outer sheath 3 are all polyethylene tubes. The inner core tube 1 is a high-density polyethylene tube. The densities of the inner core tube 1, the outer core tube 5 and the outer sheath 3 decrease in sequence. Along the circumferential direction of the outer wall of the outer sheath 3, strengthening straight ribs 7 parallel to the central axis are equidistantly arranged. There are four to six strengthening straight ribs 7, and the strengthening straight ribs 7 and the outer sheath 3 are of an integral structure.

[0021] Working principle:

[0022] On the basis of increasing the wall thicknesses of the inner core tube 1, the outer core tube 5 and the outer sheath 3, an annular support rib 4 is additionally arranged inside the inner core tube 1, which directly plays a role in radially supporting the inner core tube 1 and elastically supporting the elastic support layer 2, enhancing the strength and flexibility of the internal support structure. In addition, a mesh belt layer 6 and an outer core tube 5 are added between the elastic support layer 2 and the outer sheath 3. The mesh belt layer 6 plays a role in preventing deformation and promoting recovery after deformation by the mutual pulling and restraint between fibers in the axial and circumferential directions, improving the flexibility of the pipe, effectively improving the radial support structure strength and flexibility of the large-diameter PE pipe, and enhancing the pressure-bearing effect and the deformation structure recovery effect.

[0023] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0024] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly flexible PE pipe, comprising an inner core pipe (1), characterized in that: Annular support ribs (4) are embedded on the outer wall of the inner core pipe (1) at equal intervals along the axial direction. An elastic support layer (2) is arranged on the outer wall of the inner core pipe (1) at equal intervals along the axial direction. The inner core pipe (1) and the elastic support layer (2) are covered with an outer core pipe (5) on the outside. A mesh belt layer (6) is arranged on the surface of the outer core pipe (5). An outer sheath (3) is arranged outside the mesh belt layer (6). Reinforcing straight ribs (7) parallel to the central axis are arranged on the outer wall of the outer sheath (3) at equal intervals along the circumferential direction.

2. A highly flexible PE pipe according to claim 1, characterized in that: The annular support ribs (4) are coaxially arranged with the inner core pipe (1), and the annular support ribs (4) are circular or regular polygons with the number of sides greater than five.

3. A highly flexible PE pipe according to claim 1, characterized in that: The annular support ribs (4) are spring support ribs arranged on the cross-section of the inner core pipe (1), and the elastic support layer (2) is a spring piece welded pipe.

4. A highly flexible PE pipe according to claim 1, characterized in that: The inner wall of the elastic support layer (2) corresponding to the position of the annular support ribs (4) and the outer wall of the annular support ribs (4) support each other.

5. A highly flexible PE pipe according to claim 1, characterized in that: The mesh belt layer (6) is a continuous cross-fiber braided layer.

6. A highly flexible PE pipe according to claim 1, characterized in that: Four to six reinforcing straight ribs (7) are arranged, and the reinforcing straight ribs (7) and the outer sheath (3) are of an integral structure.

7. A highly flexible PE pipe according to claim 1, characterized in that: The inner core pipe (1), the outer core pipe (5) and the outer sheath (3) are all polyethylene pipes.

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