A polygonal double-wall corrugated pipe with high rigidity and high flexibility

Abstract

The invention discloses a polygonal double-wall corrugated pipe with high rigidity and high flexibility, comprising a pipe body, wherein the outer wall of the pipe body is provided with a polygonal outer wall and a circular outer wall; the polygonal outer wall and the circular outer wall are arranged alternately. The invention not only has the characteristics of high rigidity, but also has the characteristics of high flexibility, and at the same time, it also has the characteristics of easy installation and easy production, and is suitable for wide promotion and use.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipes, in particular to a polygonal double-wall corrugated pipe with high rigidity and high flexibility. Background Art

[0002] Double-wall plastic corrugated pipe has an annular outer wall and a smooth cylindrical inner wall. With its excellent performance, it is widely used in buried drainage pipes, etc. It was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, the promotion and application of double-wall corrugated pipes are on the rise. However, due to the structural characteristics of the pipe-the circular shape, it has installation difficulties and safety hazards in terms of installation and durability. In order to solve the above problems, patent number: CN207421550U proposes an outer octagonal inner circle double-wall corrugated pipe, and the inner wall is a cylindrical structure of the double-wall corrugated pipe, which is characterized in that the outer wall of the conventional annular structure is changed to a polygonal structure to increase the contact area between the outer surface of the pipe and the foundation, so as to solve the above problems. However, the full polygonal outer wall corrugated pipe structure proposed in the patent will cause the flexibility of the pipe to be reduced relative to the annular outer wall corrugated pipe, and cannot solve the safety problem. Summary of the invention

[0003] The purpose of the present invention is to provide a polygonal double-wall corrugated pipe with high rigidity and high flexibility. The present invention not only has the characteristics of high rigidity, but also has the characteristics of high flexibility, and at the same time, it is easy to install and produce, and is suitable for wide promotion and use.

[0004] The technical solution of the present invention is a polygonal double-wall corrugated pipe with high rigidity and high flexibility, comprising a pipe body, the outer wall of which is provided with a polygonal outer wall and a circular outer wall; the polygonal outer wall and the circular outer wall are arranged alternately.

[0005] The aforementioned polygonal double-wall corrugated tube with high rigidity and high flexibility has an outer dimension of the outer wall of the polygonal structure that is larger than that of the outer wall of the circular ring structure.

[0006] The aforementioned polygonal double-wall corrugated tube with high rigidity and high flexibility has an outer wall of the polygonal structure having an even-numbered polygonal structure.

[0007] The aforementioned polygonal double-wall corrugated pipe with high rigidity and high flexibility has an outer wall of the polygonal structure having a shape of a quadrilateral, hexagon, octagon, decagon or dodecagon.

[0008] The aforementioned polygonal double-wall corrugated pipe with high rigidity and high flexibility has an outer wall of the circular ring structure having a rectangular cross-section.

[0009] The aforementioned polygonal double-wall corrugated tube with high rigidity and high flexibility has at least one groove trough arranged on the outer peripheral surface of the outer wall of the polygonal structure.

[0010] The aforementioned polygonal double-wall corrugated tube with high rigidity and high flexibility, the cross-sectional shape of the groove trough is U-shaped.

[0011] The aforementioned polygonal double-wall corrugated pipe with high rigidity and high flexibility, wherein the pipe body, the polygonal structure outer wall and the annular structure outer wall are integrally formed by melt extrusion.

[0012] Beneficial Effects of the Invention

[0013] 1. The present invention simultaneously arranges a polygonal outer wall and a circular ring outer wall on the outer wall of the pipeline body, and arranges the polygonal outer wall and the circular ring outer wall alternately, which not only improves the ring stiffness but also has higher flexibility; in addition, compared with conventional circular ring double-wall corrugated pipes, the contact area between the pipeline and the foundation and the covering soil is increased, which is beneficial to the installation of the pipeline and the safety of its later use.

[0014] 2. The present invention further improves the rigidity and pressure resistance of the pipeline by arranging groove troughs on the outer wall of the polygonal structure of the pipeline, and at the same time, the size of the outer wall of the polygonal structure is larger than the size of the outer wall of the adjacent circular ring structure, and at the same time, further gives the pipeline better flexibility.

[0015] 3. The double-wall corrugated pipe of the present invention is integrally formed by melt extrusion and can be produced using existing equipment and production lines. It is easy to produce and suitable for wide promotion.

[0016] The ring stiffness and flexibility of the bellows of the present invention are compared with those of the traditional bellows and the bellows described in the background art as follows:

[0017] BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the pipeline of the present invention;

[0019] Figure 2 is a plan view of the pipeline of the present invention;

[0020] Figure 3 is a cross-sectional view of the pipeline of the present invention;

[0021] Figure 4 It is a partially enlarged schematic diagram of the pipeline of the present invention.

[0022] Figure numerals: 1- pipe body, 2- annular structure outer wall, 3- polygonal structure outer wall, 4- groove trough. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment: A polygonal double-wall corrugated pipe with high rigidity and high flexibility, as shown in the attached Figure 1-4 As shown, it includes a pipeline body 1, and the outer wall of the pipeline body 1 is provided with a polygonal structure outer wall 3 and a circular ring structure outer wall 2; the polygonal structure outer wall 3 and the circular ring structure outer wall 2 are alternately arranged.

[0025] Working principle: The outer wall of the pipeline of the present invention is formed by alternating the polygonal structure outer wall 3 and the circular ring structure outer wall 2 to form a double-wall corrugated pipe outer wall, which gives the pipeline the characteristics of both rigidity and flexibility.

[0026] Preferably, the outer dimensions of the polygonal structure outer wall 3 are larger than those of the annular structure outer wall 2. When the pipeline is installed and placed, the larger polygonal structure outer wall 3 first contacts the foundation and fill over a large area to ensure the rigidity of the pipeline, which is beneficial to the installation of the pipeline and the safety of its later use.

[0027] Preferably, the outer shape of the polygonal structure outer wall 3 is an even-numbered polygonal structure.

[0028] Preferably, the outer shape of the polygonal structure outer wall 3 is a quadrilateral, a hexagon, an octagon, a decagon or a dodecagon.

[0029] Preferably, the outer wall 2 of the annular structure has a rectangular cross-section.

[0030] Preferably, at least one groove trough 4 is arranged on the outer peripheral surface of the polygonal structure outer wall 3. The existence of the groove trough 4 further improves the ring stiffness of the corrugated pipe of the present invention.

[0031] Preferably, the cross-sectional shape of the groove trough 4 is U-shaped.

[0032] Preferably, the pipe body 1, the polygonal outer wall 3 and the annular outer wall 2 are integrally formed by melt extrusion. The forming equipment is consistent with the existing equipment and production line, and is easy to implement and produce.

Claims

1. A polygonal double-wall corrugated pipe with high rigidity and high flexibility, characterized in that: The invention comprises a pipeline body (1), wherein the outer wall of the pipeline body (1) is provided with a polygonal outer wall (3) and a circular ring outer wall (2); the polygonal outer wall (3) and the circular ring outer wall (2) are arranged alternately; The outer wall (2) of the circular ring structure has a rectangular cross section; The outer shape of the polygonal structure outer wall (3) is an even-numbered polygonal structure; The diameter of the outer wall (2) of the circular structure is smaller than the distance between the parallel sides of the outer wall (3) of the polygonal structure; At least one groove trough (4) is provided on the outer peripheral surface of the polygonal structure outer wall (3); The cross-sectional shape of the groove trough (4) is U-shaped; The outer dimensions of the polygonal structure outer wall (3) are greater than the outer dimensions of the annular structure outer wall (2).

2. The polygonal double-wall corrugated pipe with high rigidity and high flexibility according to claim 1, characterized in that: The outer shape of the polygonal structure outer wall (3) is a quadrilateral, a hexagon, an octagon, a decagon or a dodecagon.

3. The polygonal double-wall corrugated pipe with high rigidity and high flexibility according to claim 1, characterized in that: The pipe body (1), the polygonal structure outer wall (3) and the annular structure outer wall (2) are integrally formed by melt extrusion.

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