An impact-resistant PE water supply pipe

Abstract

This utility model discloses an impact-resistant PE water supply pipe, including a water supply pipe body. The water supply pipe body includes an inner pipe and an outer pipe concentrically distributed. The inner wall of the inner pipe is provided with reinforcing rings arranged in an array, forming an annular pressure-resistant cavity between the inner pipe and the outer pipe. An arched pressure-resistant component is arranged axially within the annular pressure-resistant cavity, which includes an arched pressure-resistant plate, an upper positioning block, and a lower positioning block. The arched pressure-resistant plate has arched feet at both ends. The arched top of the arched pressure-resistant plate contacts the inner wall of the outer pipe, and the arched feet slide in contact with the outer wall of the inner pipe. The upper positioning block is fixedly disposed between the outer arc of the arched pressure-resistant plate and the inner wall of the outer pipe. One end of the lower positioning block is fixedly disposed at the arched bottom of the arched pressure-resistant plate, and the other end is slidably connected to the outer wall of the inner pipe. This utility model belongs to the field of water supply pipeline technology, specifically providing a solution for improving the adaptability of PE water supply pipes to high-frequency water hammer impacts without significantly increasing pipe wall thickness and material costs, and for overcoming the limitations of buffer structure effectiveness.

Description

Technical Field

[0001] This utility model belongs to the field of water supply pipeline technology, specifically referring to an impact-resistant PE water supply pipe. Background Technology

[0002] Polyethylene (PE) material is widely used in building water supply, drainage, buried drainage pipes, gas pipelines, electrical and telecommunications protective conduits, industrial pipes, and agricultural pipes due to its high strength, corrosion resistance, and non-toxicity. However, existing PE water supply pipes still have significant defects under high-pressure impact conditions. For example, utility model patent CN218992617U discloses a pressure- and crack-resistant solid-wall PE pipe that can absorb energy during initial impact, but is prone to plastic deformation and failure under cyclic loading. Furthermore, while the carbon fiber layer provides stiffness, it reduces the pipe's flexibility, leading to an increased risk of low-temperature brittleness.

[0003] In addition, the water hammer shock wave generated when the water flow velocity changes suddenly can easily cause the pipe to expand and deform, especially at the pipe joints, which can cause stress concentration, leading to leakage or pipe burst. The traditional solution is to increase the pipe wall thickness, but increasing the pipe wall thickness will not only lead to flow loss, but also significantly increase material costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to improve the adaptability of PE water supply pipes to high-frequency water hammer impact without significantly increasing pipe wall thickness and material cost, and to solve the limitations of buffer structure effectiveness.

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

[0006] This utility model proposes an impact-resistant PE water supply pipe, including a water supply pipe body;

[0007] The water supply pipe body includes an inner pipe and an outer pipe that are concentrically distributed inside and outside. The inner wall of the inner pipe is provided with reinforcing rings arranged in an array, and an annular pressure-resistant cavity is formed between the inner pipe and the outer pipe.

[0008] An arched pressure-resistant assembly is arranged axially within the annular pressure-resistant cavity. The assembly includes an arched pressure-resistant plate, an upper positioning block, and a lower positioning block. The arched pressure-resistant plate is arched and has arched feet at both ends. The arched top of the arched pressure-resistant plate contacts the inner wall of the outer tube, and the arched feet slide in contact with the outer wall of the inner tube. The upper positioning block is fixedly located between the outer arc of the arched pressure-resistant plate and the inner wall of the outer tube. One end of the lower positioning block is fixedly located at the arched bottom of the arched pressure-resistant plate, and the other end is slidably connected to the outer wall of the inner tube, allowing radial displacement.

[0009] Preferably, the upper positioning block is arranged along the entire length of the outer arc surface of the arched anti-pressure plate, the arched anti-pressure plate is symmetrically distributed about the outer periphery of the inner tube, and multiple pairs of arched anti-pressure plates are arranged along the axial direction inside the annular anti-pressure cavity.

[0010] Preferably, the arched pressure-resistant assembly further includes an airbag disposed in the annular pressure-resistant cavity. The airbag is arched and distributed in a cross shape with the arched pressure-resistant plate. Its arched curved surface is orthogonal to the arched pressure-resistant plate. The airbag is filled with nitrogen gas at a pressure of 0.2-0.5 MPa.

[0011] Preferably, the annular pressure-resistant cavity is sealed on the outside and filled with a shear thickening fluid, the viscosity of which increases stepwise with the increase of impact rate. The shear thickening fluid is a polyethylene glycol-based nano-silica suspension with SiO2 particle size of 150-250 nm and mass fraction of 35%-40%.

[0012] Preferably, the height of the reinforcing ring is 1 / 3 of the thickness of the inner tube wall, and the reinforcing rings are arranged in a uniformly spaced array or in a spiral distribution with a spiral angle of 45°±5°.

[0013] Preferably, the arched anti-compression sheet is made of shape memory alloy, and the upper positioning block and lower positioning block are made of PEEK material.

[0014] Preferably, the inner tube is made of PE100 carbon fiber composite material with a carbon fiber content of 15%-25%, and the outer tube is made of PE80 glass fiber composite material with a glass fiber content of 10%-15%. When the pipe is subjected to bending load, the upper positioning block transmits the torque to the outer tube, which has greater rigidity.

[0015] The beneficial effects of this utility model by adopting the above structure are as follows:

[0016] 1. The axial impact is converted into radial deformation by the arched anti-compression plate with an arched structure. The shape memory alloy material recovers most of the impact energy through superelastic recovery, thereby achieving dynamic energy dissipation. In addition, the use of shear thickening fluid can still trigger abrupt changes in rheological properties under high-frequency micro-amplitude oscillation. The synergistic energy dissipation of the two causes the amplitude to decay.

[0017] 2. The inner tube is made of PE100 carbon fiber composite material and the outer tube is made of PE80 glass fiber composite material. This improves the structural rigidity and suppresses the resonance amplification phenomenon caused by high-frequency vibration. The combination of the arched anti-compression plate with the arch facing outward and the upper fixed block directs the high-frequency vibration energy to the outer tube. The lower sliding positioning block allows the inner tube to vibrate slightly at high frequency, avoiding stress wave reflection amplification caused by rigid constraints. Attached Figure Description

[0018] Figure 1A schematic diagram of the external structure of an impact-resistant PE water supply pipe provided in this application;

[0019] Figure 2 A schematic diagram of the internal structure of an impact-resistant PE water supply pipe provided in this application;

[0020] Figure 3 for Figure 1 Internal sectional view;

[0021] Figure 4 Another internal structure diagram provided in this application.

[0022] Among them, 1. Inner tube, 2. Outer tube, 3. Reinforcing ring, 4. Annular pressure-resistant cavity, 5. Arched pressure-resistant component;

[0023] 51. Arched anti-compression sheet; 52. Upper positioning block; 53. Lower positioning block; 54. Airbag; 55. Shear thickening liquid.

[0024] 501. Arch foot; 502. Arch top.

[0025] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0026] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] In this application, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Example 1

[0030] Please see Figures 1-3 As shown, this utility model proposes an impact-resistant PE water supply pipe, including a water supply pipe body. The water supply pipe body includes an inner pipe 1 and an outer pipe 2, which are concentrically distributed. An annular pressure-resistant cavity 4 is formed between the inner pipe 1 and the outer pipe 2. An arched pressure-resistant component 5 is arranged axially in the annular pressure-resistant cavity 4, which includes an arched pressure-resistant plate 51, an upper positioning block 52, and a lower positioning block 53. The arched pressure-resistant plate 51 is arched and has arch feet 501 at both ends. The arch top 502 of the arched pressure-resistant plate 51 contacts the inner wall of the outer pipe 2, and the arch feet 501 slide in contact with the outer wall of the inner pipe 1. The upper positioning block 52 is fixedly disposed between the outer arc of the arched pressure-resistant plate 51 and the inner wall of the outer pipe 2. One end of the lower positioning block 53 is fixedly disposed at the arch bottom of the arched pressure-resistant plate 51, and the other end is slidably connected to the outer wall of the inner pipe 1, allowing radial displacement.

[0031] The upper positioning block 52 is arranged along the entire length of the outer arc surface of the arched pressure-resistant plate 51. The arched pressure-resistant plates 51 are symmetrically distributed about the outer periphery of the inner tube 1. Multiple pairs of arched pressure-resistant plates 51 are arranged axially within the annular pressure-resistant cavity 4. The arched pressure-resistant plates 51 are made of shape memory alloy, while the upper positioning block 52 and lower positioning block 53 are made of PEEK material. The inner tube 1 is made of PE100 carbon fiber composite material with a carbon fiber content of 15%-25%, and the outer tube 2 is made of PE80 glass fiber composite material with a glass fiber content of 10%-15%. When the pipe is subjected to bending load, the upper positioning block 52 transmits the torque to the more rigid outer tube 2.

[0032] More precisely, the arched anti-compression sheet 51 is a Ni-Ti type shape memory alloy strip.

[0033] In a further embodiment, the arched pressure-resistant component 5 also includes an airbag 54 disposed within the annular pressure-resistant cavity 4. The airbag 54 is arched and distributed in a cross shape with the arched pressure-resistant plate 51. Its arched curved surface is orthogonal to the arched pressure-resistant plate 51. The airbag 54 is filled with nitrogen gas at a pressure of 0.2-0.5 MPa.

[0034] Further plans, refer to Figure 3As shown, the annular pressure-resistant cavity 4 is sealed on the outside and filled with a shear thickening fluid. Its viscosity increases stepwise with the increase of impact rate. The shear thickening fluid is a polyethylene glycol-based nano-silica suspension with SiO2 particle size of 150-250 nm and mass fraction of 35%-40%.

[0035] The principle behind this solution is as follows:

[0036] First, the axial impact is converted into radial deformation by the arched anti-compression plate 51 with an arched structure. The shape memory alloy material recovers most of the impact energy through superelastic recovery, thereby achieving dynamic energy dissipation.

[0037] Secondly, by using shear thickening fluid, a sudden change in rheological properties can still be triggered under high-frequency micro-amplitude oscillation. The synergistic energy dissipation of the arched anti-compression sheet 51 made of shape memory alloy material causes the amplitude to decay.

[0038] Furthermore, the inner tube 1 is made of PE100 carbon fiber composite material and the outer tube 2 is made of PE80 glass fiber composite material, which improves the structural rigidity and suppresses the resonance amplification phenomenon caused by high-frequency vibration, in accordance with the principle of high-frequency adaptability.

[0039] As a further example:

[0040] Combination Figure 3 and Figure 4 As shown, the inner wall of the inner tube 1 is provided with reinforcing rings 3 arranged in an array. The ring height of the reinforcing rings 3 is 1 / 3 of the wall thickness of the inner tube 1. The reinforcing rings 3 are arranged in a uniformly spaced array, which can be arranged perpendicular to the axis, inclined to the axis, or spirally distributed with a spiral angle of 45°±5°.

[0041] In this structure, the reinforcing ring 3 can disrupt standing waves and block energy accumulation when water flows, reduce the impact of water hammer, and also improve the pressure resistance of the inner tube 1.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An impact-resistant PE water supply pipe, comprising a water supply pipe body, characterized in that: The water supply pipe body includes an inner pipe (1) and an outer pipe (2) that are concentrically distributed inside and outside. The inner wall of the inner pipe (1) is provided with reinforcing rings (3) arranged in an array. An annular pressure-resistant cavity (4) is formed between the inner pipe (1) and the outer pipe (2). An arched anti-pressure assembly (5) is arranged axially inside the annular anti-pressure cavity (4), which includes an arched anti-pressure plate (51), an upper positioning block (52) and a lower positioning block (53). The arched anti-pressure plate (51) is arched and has arch feet (501) at both ends. The arch top (502) of the arched anti-pressure plate (51) is in contact with the inner wall of the outer tube (2), and the arch feet (501) are in sliding contact with the outer wall of the inner tube (1). The upper positioning block (52) is fixed between the outer arc of the arched anti-pressure plate (51) and the inner wall of the outer tube (2). One end of the lower positioning block (53) is fixed to the bottom of the arched anti-pressure plate (51), and the other end is slidably connected to the outer wall of the inner tube (1). The annular pressure-resistant cavity (4) is sealed on the outside and filled with shear thickening fluid, the viscosity of which increases stepwise with the increase of impact rate.

2. The impact resistant PE water service pipe according to claim 1, characterized in that: The upper positioning block (52) is set along the entire length of the outer arc surface of the arched anti-pressure plate (51). The arched anti-pressure plate (51) is symmetrically distributed about the outer periphery of the inner tube (1). Multiple pairs of arched anti-pressure plates (51) are arranged along the axial direction inside the annular anti-pressure cavity (4).

3. A PE impact pipe according to claim 2, characterized in that: The arched anti-compression assembly (5) also includes an airbag (54) disposed in the annular anti-compression cavity (4). The airbag (54) is arched and distributed in a cross shape with the arched anti-compression plate (51). Its arched curved surface is orthogonal to the arched anti-compression plate (51).

4. The impact resistant PE water service pipe according to claim 1, wherein: The height of the reinforcing ring (3) is 1 / 3 of the wall thickness of the inner tube (1). The reinforcing ring (3) is arranged in a uniformly spaced array or in a spiral distribution.

5. The impact resistant PE water service pipe according to claim 1, wherein: The arched anti-compression plate (51) is made of shape memory alloy, and the upper positioning block (52) and lower positioning block (53) are made of PEEK material.

6. The impact resistant PE water service pipe according to claim 1, wherein: The inner tube (1) is made of PE100 carbon fiber composite material, and the outer tube (2) is made of PE80 glass fiber composite material.

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