A high flexibility multi-layer composite bellows

Abstract

This utility model discloses a highly flexible multilayer composite corrugated pipe, relating to the field of corrugated pipe technology. The highly flexible multilayer composite corrugated pipe includes a corrugated pipe with an inner lining layer on its inner wall. A toughness component for enhancing overall toughness is disposed on the outer surface of the inner lining layer. The toughness component includes a flexibility layer disposed on the inner wall of the corrugated pipe. An interlocking tube is disposed on the inner wall of the flexibility layer, and a locking block is disposed on the inner wall of the interlocking tube. A steel strip is disposed on the outer surface of the locking block. This utility model restricts the axial sliding of the steel strip through the interlocking structure, allowing the steel strip to deform synchronously with the corrugated pipe during bending, thus avoiding stress concentration-induced fracture. This highly flexible multilayer composite corrugated pipe achieves a balance between flexibility, strength, and durability through the synergistic design of the interlocking tube, steel strip, and steel mesh.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe technology, specifically a highly flexible multilayer composite corrugated pipe. Background Technology

[0002] High-flexibility multilayer composite corrugated pipe is a pipe product made through special structural design and material composite process. Its core advantage lies in the combination of high flexibility and the performance characteristics of multilayer composite materials, which can adapt to complex working conditions.

[0003] Traditional corrugated pipes typically increase the thickness of the steel strip or the winding density to improve strength, but this leads to a decrease in pipe flexibility, making it difficult to adapt to small-radius bends or uneven foundation settlement, which can easily cause joint separation or pipe body breakage. Multi-layer corrugated pipes often experience interlayer peeling due to direct contact between the inner lining and the reinforcing layer under thermal expansion and contraction or chemical corrosion, resulting in corrosion failure or structural instability. Utility Model Content

[0004] This invention provides a high-flexibility multi-layer composite corrugated pipe that combines high strength with toughness to protect the pipe body. It solves the problem that traditional corrugated pipes often increase the thickness of the steel strip or the winding density to improve strength, but this leads to a decrease in pipe flexibility, making it difficult to adapt to small-radius bends or uneven foundation settlement, which can easily cause joint separation or pipe body breakage. Multi-layer corrugated pipes often suffer from interlayer delamination due to direct contact between the inner lining and the reinforcing layer under thermal expansion and contraction or chemical corrosion, resulting in corrosion failure or structural instability.

[0005] To achieve both high strength and toughness in protecting the pipe body, this utility model provides the following technical solution: a highly flexible multi-layer composite corrugated pipe, comprising a corrugated pipe, wherein an inner lining layer is provided on the inner wall of the corrugated pipe, and a toughness component for enhancing overall toughness is provided on the outer surface of the inner lining layer, wherein:

[0006] The toughness component includes a flexible layer disposed on the inner wall of the bellows, an interlocking tube disposed on the inner wall of the flexible layer, and a locking block disposed on the inner wall of the interlocking tube.

[0007] The outer surface of the card block is provided with a steel strip, the outer surface of the steel strip is provided with a fitting groove, and the outer surface of the flexible layer is provided with a steel mesh.

[0008] As a preferred technical solution of this utility model, the material of the soft layer is polyethylene, and the inner wall of the inner lining layer is sprayed with an anti-corrosion coating.

[0009] As a preferred embodiment of this utility model, the flexible layer is disposed between the inner lining layer and the corrugated pipe, and a plurality of interlocking pipes are equidistantly arranged on the inner wall of the flexible layer.

[0010] As a preferred embodiment of this utility model, the outer surface of the interlocking tube is fixedly connected to the inner wall of the soft layer, and two locking blocks are installed at equal intervals on the inner wall of each interlocking tube.

[0011] As a preferred technical solution of this utility model, the card block is fixedly connected to the inner wall of the fitting tube, and a steel strip is provided on the inner wall of each fitting tube to enhance the strength and toughness of the corrugated pipe.

[0012] As a preferred technical solution of this utility model, two matching grooves are equally spaced on the outer surface of each steel strip, and the inner wall of the matching groove is engaged with the outer surface of the locking block.

[0013] As a preferred embodiment of this utility model, a steel mesh is provided on the outer surface of the flexible layer, the steel mesh is disposed between the corrugated pipe and the flexible layer, and the interlocking pipe is used to enhance the toughness of the corrugated pipe.

[0014] Compared with the prior art, this utility model provides a highly flexible multilayer composite corrugated pipe with the following advantages:

[0015] This highly flexible multi-layer composite corrugated pipe restricts the axial sliding of the steel strip through an interlocking structure. During bending, the steel strip deforms synchronously with the corrugated pipe, preventing stress concentration-induced fracture. Through the synergistic design of the interlocking pipe, steel strip, and steel mesh, this highly flexible multi-layer composite corrugated pipe achieves a balance between flexibility, strength, and durability, significantly improving construction efficiency and overall life-cycle cost-effectiveness. It is particularly suitable for complex geological and highly corrosive environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0019] Figure 4 This is a partial structural diagram of the toughness component of this utility model;

[0020] Figure 5 This utility model provides Figure 4 Enlarged schematic diagram of part A in the middle.

[0021] In the figure: 1. Corrugated pipe; 2. Inner lining; 20. Anti-corrosion coating; 3. Toughness component; 310. Soft layer; 311. Polyethylene; 320. Embedded pipe; 321. Clamping block; 322. Steel strip; 323. Fitting groove; 324. Steel mesh. Detailed Implementation

[0022] 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. Example 1

[0023] Please see Figures 1-5 This utility model discloses a highly flexible multilayer composite corrugated pipe, including a corrugated pipe 1, an inner lining layer 2 disposed on the inner wall of the corrugated pipe 1, and a toughness component 3 for enhancing the overall toughness disposed on the outer surface of the inner lining layer 2, wherein:

[0024] The toughness component 3 includes a flexible layer 310, which is disposed on the inner wall of the bellows 1. The inner wall of the flexible layer 310 is provided with a fitting tube 320, and the inner wall of the fitting tube 320 is provided with a locking block 321.

[0025] The outer surface of the card block 321 is provided with a steel strip 322, and the outer surface of the steel strip 322 is provided with a fitting groove 323. The outer surface of the flexible layer 310 is provided with a steel mesh 324.

[0026] The material of the soft layer 310 is polyethylene 311, and the inner wall of the inner lining layer 2 is coated with an anti-corrosion coating 20.

[0027] The soft layer 310 is disposed between the inner lining layer 2 and the corrugated pipe 1, and a number of interlocking pipes 320 are equidistantly arranged on the inner wall of the soft layer 310.

[0028] The locking block 321 is fixedly connected to the inner wall of the fitting tube 320. Each fitting tube 320 has a steel strip 322 on its inner wall. The steel strip 322 is used to strengthen the strength and toughness of the corrugated pipe 1.

[0029] Each steel strip 322 has two equally spaced mating grooves 323 on its outer surface, and the inner wall of the mating groove 323 engages with the outer surface of the locking block 321.

[0030] A steel mesh 324 is provided on the outer surface of the flexible layer 310. The steel mesh 324 is disposed between the corrugated pipe 1 and the flexible layer 310. The interlocking pipe 320 is used to enhance the toughness of the corrugated pipe 1.

[0031] Select appropriate connectors such as electrofusion sleeves and rubber sealing rings according to the pipe specifications to ensure no interference with the locking block 321 of the fitting pipe 320 and the mating groove 323 of the steel strip 322. Remove impurities from the pipe ends to avoid damaging the anti-corrosion coating 20 or the surface of the fitting pipe 320.

[0032] The working principle and usage process of this utility model are as follows: Confirm that the corrugated pipe 1 is free of cracks, the inner lining layer 2 is undamaged, and the anti-corrosion coating 20 is intact. Select suitable connectors such as electrofusion sleeves and rubber sealing rings according to the pipe specifications, ensuring no interference with the locking block 321 of the fitting pipe 320 and the fitting groove 323 of the steel strip 322. Remove impurities from the pipe ends to avoid damaging the anti-corrosion coating 20 or the surface of the fitting pipe 320.

[0033] During installation, align the interlocking pipes 320 of adjacent pipes to ensure that the locking block 321 and the fitting groove 323 are precisely engaged, thus limiting axial displacement.

[0034] Fixed connection: An electrofusion wire is wound around the outer wall of the interlocking tube 320, and the polyethylene flexible layer 310 is melted by electric heating to form an integral seal. If a rubber sealing ring is used, the sealing ring is embedded in the gap between the locking block 321 and the mating groove 323, and torque is applied to tighten it.

[0035] Steel mesh reinforcement: After installation, check whether the steel mesh 324 is tightly attached between the flexible layer 310 and the corrugated pipe 1, ensuring there are no wrinkles or detachments. Inject the medium into the pipeline and gradually increase the pressure to 1.5 times the design pressure, observing the fitting state between the interlocking pipe 320 and the steel strip 322 to confirm there are no leaks. In complex working conditions, such as crossing soft soil foundations, monitor the stress distribution of the steel mesh 324 using strain gauges to verify its effectiveness in dispersing impact loads. Regularly inspect the anti-corrosion coating 20.

Claims

1. A highly flexible multilayer composite corrugated pipe, comprising a corrugated pipe (1), wherein the inner wall of the corrugated pipe (1) is provided with an inner lining layer (2), characterized in that: The outer surface of the inner liner (2) is provided with a toughness component (3) for enhancing overall toughness, wherein: The toughness component (3) includes a flexible layer (310), which is disposed on the inner wall of the bellows (1). The inner wall of the flexible layer (310) is provided with a fitting tube (320), and the inner wall of the fitting tube (320) is provided with a locking block (321). The outer surface of the card block (321) is provided with a steel strip (322), the outer surface of the steel strip (322) is provided with a fitting groove (323), and the outer surface of the soft layer (310) is provided with a steel mesh (324).

2. The high-flexibility multilayer composite corrugated pipe according to claim 1, characterized in that: The material of the soft layer (310) is polyethylene (311), and the inner wall of the inner lining layer (2) is sprayed with an anti-corrosion coating (20).

3. The high-flexibility multilayer composite corrugated pipe according to claim 2, characterized in that: The soft layer (310) is disposed between the inner lining layer (2) and the corrugated pipe (1), and a plurality of interlocking pipes (320) are equidistantly arranged on the inner wall of the soft layer (310).

4. The high-flexibility multilayer composite corrugated pipe according to claim 2, characterized in that: The outer surface of the interlocking tube (320) is fixedly connected to the inner wall of the soft layer (310), and two locking blocks (321) are installed at equal intervals on the inner wall of each interlocking tube (320).

5. The high-flexibility multilayer composite corrugated pipe according to claim 1, characterized in that: The card block (321) is fixedly connected to the inner wall of the fitting tube (320), and each fitting tube (320) has a steel strip (322) on its inner wall. The steel strip (322) is used to strengthen the strength and toughness of the corrugated pipe (1).

6. The high-flexibility multilayer composite corrugated pipe according to claim 5, characterized in that: Each of the steel strips (322) has two equally spaced mating grooves (323) on its outer surface, and the inner wall of the mating groove (323) engages with the outer surface of the locking block (321).

7. The high-flexibility multilayer composite corrugated pipe according to claim 5, characterized in that: The outer surface of the flexible layer (310) is provided with a steel mesh (324), which is disposed between the corrugated pipe (1) and the flexible layer (310). The interlocking pipe (320) is used to enhance the toughness of the corrugated pipe (1).

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