PPH modified pipe with good compression resistance

Abstract

The utility model relates to the technical field of plastic pipeline, disclose a PPH modified pipe with good compression resistance effect, including the pipe body, the body material of pipe body includes multifunctional structure layer subassembly, the multifunctional structure layer subassembly is by inside to outside in proper order and is abrasion -resistant sublayer, corrosion -resistant sublayer, inner transition adhesive layer, middle layer main compression resistance layer, outer transition adhesive layer and impact resistance weather layer, the impact resistance weather layer includes UV modified PPH sublayer and basalt fiber modified PPH outer layer, UV modified PPH sublayer sets up at the outside of outer transition adhesive layer, the basalt fiber modified PPH outer layer sets up at the outside of UV modified PPH sublayer. In the utility model, the PPH modified pipe is through " inner layer double protection, middle layer core compression resistance, outer layer barrier guarantee + transition layer strong connection " multilayer synergic design, improves the overall compression resistance performance simultaneously, and weather resistance, abrasion resistance and structural stability are taken into account, and the application scope is wider and the long -term use reliability is higher.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe technology, and in particular to a PPH modified pipe with good pressure resistance. Background Technology

[0002] PPH (homopolymer polypropylene) pipes are widely used in water supply, chemical media transportation, and mine wastewater discharge due to their corrosion resistance, lightweight, and ease of processing. With the increasing complexity of engineering scenarios (such as deep burial, transportation of particulate matter, and long-term outdoor exposure), higher requirements are being placed on the compressive strength of PPH pipes. They must not only withstand soil pressure and construction impacts during deep burial, but also maintain structural stability over long periods in complex media or outdoor environments to prevent compressive strength degradation.

[0003] Existing PPH pipes fail to meet these requirements and exhibit significant technical deficiencies: On the one hand, most adopt a single-layer structure or a simple multi-layer mixed material structure, limiting their compressive strength to the characteristics of a single material and making them unsuitable for high-pressure scenarios. On the other hand, the inner layer relies on a single material, failing to simultaneously ensure wear resistance and corrosion resistance. When transporting media containing particles or corrosive substances, the inner wall is prone to wear and corrosion, leading to thinning of the wall thickness and further weakening the compressive strength. In addition, the outer layer offers limited protection, lacking sufficient impact resistance and weather resistance. When exposed to outdoor conditions for extended periods or subjected to construction collisions, it is susceptible to aging and damage, compromising the overall structural stability and ultimately causing a rapid decline in compressive strength, making it difficult to meet the long-term usage requirements of complex engineering scenarios.

[0004] Therefore, those skilled in the art have provided a PPH modified pipe with good pressure resistance to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies and provide a PPH modified pipe with good pressure resistance. This PPH modified pipe effectively solves the problem of insufficient pressure resistance caused by the single structure of traditional PPH pipes through a multi-layer collaborative design of "inner double protection, middle core pressure resistance, outer barrier protection + strong connection of transition layer". At the same time, it also takes into account weather resistance, wear resistance and structural stability, and has a wider range of applications and higher reliability in long-term use.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A PPH modified pipe with good pressure resistance includes a pipe body. The body material of the pipe body includes a multifunctional structural layer assembly. The multifunctional structural layer assembly consists of, from the inside out, a wear-resistant sublayer, a corrosion-resistant sublayer, an inner transition bonding layer, a middle main pressure-resistant layer, an outer transition bonding layer, and an impact-resistant and weather-resistant layer. The impact-resistant and weather-resistant layer includes a UV-resistant modified PPH sublayer and a basalt fiber modified PPH outer layer. The UV-resistant modified PPH sublayer is disposed outside the outer transition bonding layer, and the basalt fiber modified PPH outer layer is disposed outside the UV-resistant modified PPH sublayer.

[0008] Through the above technical solution, the multifunctional structural layer component adopts a hierarchical design of "inner layer protection - middle layer pressure resistance - outer layer protection". Each layer has a clear division of labor and works synergistically. The wear-resistant sublayer and corrosion-resistant sublayer form a double inner layer of protection to resist the wear and corrosion of the transported medium and avoid the failure of the pressure resistance foundation due to damage to the inner layer structure. The inner and outer transition bonding layers strengthen the interlayer bonding through material homology, eliminate interface gaps, and ensure that each layer bears the load synchronously when stressed. The middle main pressure-resistant layer, as the core load-bearing layer, uses the properties of high-strength materials to bear the main external pressure. The impact-resistant and weather-resistant layer resists the impact and aging of the external environment, and the UV-resistant modified PPH sublayer can effectively absorb the stress. Ultraviolet radiation is used to prevent the pipe's internal structure (especially the middle main pressure-resistant layer) from aging and damage. The basalt fiber modified PPH outer layer, with its high toughness, resists external impacts such as construction collisions and soil friction. The two layers form a double outer layer protection of "internal anti-aging - external impact resistance," which not only extends the service life of the pipe but also prevents external impacts from being directly transmitted to the middle pressure-resistant structure, thus avoiding local stress concentration and further ensuring the stability of the overall pressure resistance. The layers are connected by co-extrusion melt molding, which significantly improves the overall pressure resistance of the pipe and solves the problem of insufficient pressure resistance caused by the simple structure or poor interlayer bonding of traditional PPH pipes.

[0009] Furthermore, the wear-resistant sublayer is made of silicon carbide modified PPH material;

[0010] Through the above technical solution, silicon carbide, as a high-hardness wear-resistant particle, is uniformly dispersed in the PPH substrate, which can significantly improve the wear resistance of the inner surface. It is especially suitable for conveying media containing mud, sand, particles and other media, reducing the wear of the inner wall of the pipe due to long-term scouring of the media, avoiding the decrease in compressive strength caused by the reduction of wall thickness, and protecting the structural integrity of the pipe from the source.

[0011] Furthermore, the corrosion-resistant sublayer is made of glass fiber modified PPH material;

[0012] Through the above technical solutions, glass fiber can not only enhance the structural strength of PPH, but its chemical stability can also improve the sublayer's resistance to corrosive media such as water and weak acids and alkalis, preventing the media from penetrating and eroding the inner layer structure. At the same time, it works in synergy with the wear-resistant sublayer to form a composite protection of "wear resistance + corrosion resistance", ensuring that the inner layer can still provide stable support for the overall compressive structure in complex media environments.

[0013] Furthermore, the inner transition adhesive layer and the outer transition adhesive layer are made of PPH-based hot melt adhesive material;

[0014] Through the above technical solution, the PPH-based hot melt adhesive has good molecular compatibility with the PPH substrate of the adjacent layer. During co-extrusion molding, it can melt and fuse with the adjacent layer to form a tight molecular-level connection, which greatly improves the interlayer peel strength.

[0015] Furthermore, the intermediate main compressive layer is made of carbon fiber modified PPH material;

[0016] Through the above technical solutions, carbon fiber has high strength and high modulus characteristics. When combined with PPH substrate, it can significantly improve the ring pressure resistance of the middle layer. As the core pressure-resistant structure of the pipe, it can effectively disperse and bear the main stresses such as external soil pressure and impact load, and avoid failure of the pipe due to excessive deformation or rupture.

[0017] This utility model has the following beneficial effects:

[0018] This utility model proposes a PPH modified pipe with good pressure resistance. Through a multi-layer collaborative design of "inner double protection, middle core pressure resistance, outer barrier protection + strong connection of transition layer", the PPH modified pipe effectively solves the problem of insufficient pressure resistance caused by the single structure of traditional PPH pipe. Its inner wear-resistant and corrosion-resistant properties are suitable for complex media transportation scenarios, avoiding damage to the pressure-resistant foundation caused by wall wear or corrosion. The high-strength material of the middle layer efficiently bears external pressure, and the UV-resistant and impact-resistant design of the outer layer extends the service life. Ultimately, while improving the overall pressure resistance, it also takes into account weather resistance, wear resistance and structural stability, making it more widely applicable and more reliable in long-term use. Attached Figure Description

[0019] Figure 1 This is an isometric view of a PPH modified pipe with good compressive strength proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of a PPH modified pipe with good pressure resistance proposed in this utility model;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Pipe body; 2. Multifunctional structural layer assembly; 3. Wear-resistant sub-layer; 4. Corrosion-resistant sub-layer; 5. Inner transition bonding layer; 6. Middle main compressive strength layer; 7. Outer transition bonding layer; 8. Impact-resistant and weather-resistant layer; 9. UV-resistant modified PPH sub-layer; 10. Basalt fiber modified PPH outer layer. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Reference Figure 1-3This utility model provides a specific embodiment: a PPH modified pipe with good pressure resistance, including a pipe body 1. The main body material of the pipe body 1 includes a multi-functional structural layer assembly 2. The multi-functional structural layer assembly 2 consists of, from the inside out, a wear-resistant sub-layer 3, a corrosion-resistant sub-layer 4, an inner transition bonding layer 5, a middle main pressure-resistant layer 6, an outer transition bonding layer 7, and an impact-resistant and weather-resistant layer 8. The impact-resistant and weather-resistant layer 8 includes a UV-resistant modified PPH sub-layer 9 and a basalt fiber modified PPH outer layer 10. The UV-resistant modified PPH sub-layer 9 is located outside the outer transition bonding layer 7, and the basalt fiber modified PPH outer layer 10 is located outside the UV-resistant modified PPH sub-layer 9. The multi-functional structural layer assembly 2 adopts a hierarchical design of "inner layer protection - middle layer pressure resistance - outer layer protection". Each layer has a clear division of labor and works synergistically. The wear-resistant sub-layer 3 and the corrosion-resistant sub-layer 4 form a double inner layer protection to resist the wear and corrosion of the transported medium and avoid the failure of the pressure-resistant foundation caused by damage to the inner layer structure. The inner transition bonding layer 5 and the outer transition bonding layer 7... By strengthening the interlayer bonding through material homogeneity and eliminating interface gaps, the layers are ensured to bear load synchronously under stress. The middle main compressive layer 6 serves as the core load-bearing layer, utilizing the high-strength material properties to bear the main external pressure. The impact-resistant and weather-resistant layer 8 resists external environmental impacts and aging. The UV-resistant modified PPH sublayer 9 can effectively absorb ultraviolet rays, preventing ultraviolet rays from aging and damaging the internal structure of the pipe body 1 (especially the middle main compressive layer 6). The basalt fiber modified PPH outer layer 10, with the high toughness of basalt fiber, resists external impacts such as construction collisions and soil friction. The two form a double outer layer protection of "internal anti-aging - external impact resistance", which not only extends the service life of the pipe body 1, but also avoids the local stress concentration caused by the direct transmission of external impacts to the middle compressive structure, further ensuring the stability of the overall compressive performance. The layers are connected by co-extrusion melt molding, which significantly improves the overall compressive performance of the pipe body 1 and solves the problem of insufficient compressive strength of traditional PPH pipes due to simple structure or poor interlayer bonding.

[0026] The wear-resistant sublayer 3 is made of silicon carbide modified PPH material. Silicon carbide, as a high-hardness wear-resistant particle, is uniformly dispersed in the PPH substrate, which can significantly improve the wear resistance of the inner surface. It is especially suitable for conveying media containing mud, sand, particles and other media, reducing the wear of the inner wall of the pipe body 1 caused by long-term media scouring, avoiding the decrease in compressive strength due to thinning of the wall thickness, and protecting the structural integrity of the pipe body 1 from the source.

[0027] The corrosion-resistant sublayer 4 is made of glass fiber modified PPH material. Glass fiber can not only enhance the structural strength of PPH, but its chemical stability can also improve the sublayer's resistance to corrosive media such as water and weak acids and alkalis, preventing the media from penetrating and eroding the inner layer structure. At the same time, it works together with the wear-resistant sublayer 3 to form a composite protection of "wear resistance + corrosion resistance", ensuring that the inner layer can still provide stable support for the overall compressive structure in complex media environments.

[0028] The inner transition adhesive layer 5 and the outer transition adhesive layer 7 are made of PPH-based hot melt adhesive material. The PPH-based hot melt adhesive has good molecular compatibility with the PPH substrate of the adjacent layer. During co-extrusion molding, it can melt and fuse with the adjacent layer to form a tight molecular-level connection, which greatly improves the interlayer peel strength.

[0029] The middle main compressive layer 6 is made of carbon fiber modified PPH material. Carbon fiber has high strength and high modulus characteristics. When combined with PPH substrate, it can significantly improve the ring pressure resistance of the middle layer. As the core compressive structure of pipe body 1, it can effectively disperse and bear the main stresses such as external soil pressure and impact load, and avoid failure of pipe body 1 due to excessive deformation or rupture.

[0030] Working Principle: This PPH modified pipe is based on a multi-layered structure for synergistic protection and force transmission. The inner layer of the pipe body 1, which contacts the transported medium, is protected against particle erosion by a silicon carbide-modified PPH wear-resistant sub-layer 3, while a glass fiber-modified PPH corrosion-resistant sub-layer 4 isolates it from corrosive media penetration. These two layers form a double barrier protecting the basic structure of the pipe body 1. An inner transition bonding layer 5 tightly connects the inner layer to the middle main pressure-resistant layer 6, ensuring stable force transmission from the inner layer to the middle layer. The middle main pressure-resistant layer 6, relying on the high strength properties of carbon fiber-modified PPH, serves as the core load-bearing layer, dispersing and... To withstand external pressure and avoid local stress overload, the outer transition bonding layer 7 further strengthens the connection between the middle and outer layers, ensuring overall stress coordination. In the outer layer, the UV-resistant modified PPH sublayer 9 blocks ultraviolet rays to delay the aging of the pipe body 1, and the basalt fiber modified PPH outer layer 10 resists external impact and friction, forming an external protective barrier. Each layer achieves molecular-level bonding through co-extrusion melting. Under the action of media transportation and external environment, they cooperate from the inside to the outside, protecting the structural integrity and efficiently transmitting and dispersing stress, ultimately achieving a significant improvement in overall compressive strength.

[0031] The following points should be noted in this article:

[0032] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0033] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PPH modified pipe with good pressure resistance, comprising a pipe body (1), characterized in that: The body material of the pipe (1) includes a multifunctional structural layer assembly (2). The multifunctional structural layer assembly (2) consists of a wear-resistant sublayer (3), a corrosion-resistant sublayer (4), an inner transition bonding layer (5), a middle main pressure-resistant layer (6), an outer transition bonding layer (7), and an impact-resistant and weather-resistant layer (8) from the inside to the outside. The impact-resistant and weather-resistant layer (8) includes a UV-resistant modified PPH sublayer (9) and a basalt fiber modified PPH outer layer (10). The UV-resistant modified PPH sublayer (9) is located on the outside of the outer transition bonding layer (7), and the basalt fiber modified PPH outer layer (10) is located on the outside of the UV-resistant modified PPH sublayer (9).

2. The PPH modified pipe with good pressure resistance according to claim 1, characterized in that: The wear-resistant sublayer (3) is made of silicon carbide modified PPH material.

3. The PPH modified pipe with good pressure resistance according to claim 1, characterized in that: The corrosion-resistant sublayer (4) is made of glass fiber modified PPH material.

4. The PPH modified pipe with good pressure resistance according to claim 1, characterized in that: The inner transition adhesive layer (5) and the outer transition adhesive layer (7) are made of PPH-based hot melt adhesive material.

5. The PPH modified pipe with good pressure resistance according to claim 1, characterized in that: The middle main compressive layer (6) is made of carbon fiber modified PPH material.

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