Modified polypropylene pipe for protecting high-voltage power cable

Abstract

The utility model discloses a modified polypropylene pipe for protecting a high-voltage power cable, which is characterized in that a polypropylene material is divided into three layers, namely an outer layer, a middle layer and an inner layer, a polyurethane coating is painted on the outer circle wall of the polypropylene material on the outer layer, glass fibers are fixedly mounted on the inner circle wall of the polypropylene material on the outer layer, and the inner circle wall of the polypropylene material on the middle layer is coated with a polyurethane coating. The three layers are arranged so that the whole material of the pipe can be better observed, meanwhile, the polypropylene material is arranged so that the pipe can bear large impact force and is not prone to being broken or damaged, the polyurethane coating has excellent elasticity and flexibility, and the coating requirements of various shapes and curved surfaces can be met; meanwhile, completeness and attractiveness of the coating are kept, excellent weather resistance and corrosion resistance are achieved, weather change, ultraviolet radiation and erosion of chemical substances can be resisted, and the service life of the pipe is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of protective pipe technology, specifically to a modified polypropylene pipe for the protection of high-voltage power cables. Background Technology

[0002] Currently, there are two types of trenchless power cable conduits on the market: PE and MPP. These two materials have different advantages and disadvantages in different application areas. Compared to MPP, PE power cable conduits have better resistance to low-temperature brittleness and higher weldability. They also have better toughness, a wider range of applications, strong applicability, and a service life of up to 50 years. The cost of conduits of the same specifications and grade is relatively lower. In contrast, MPP power cable conduits have better high-temperature resistance due to their higher melting point, larger elastic modulus, and higher coefficient of friction. Their physical and mechanical properties are better than PE, making them suitable for use as protective conduits for high-voltage and high-temperature power cables.

[0003] Power cable protection pipes are important components in the power industry. However, modified polypropylene power cable protection pipes still have shortcomings in terms of impact resistance, flame retardancy, electrical insulation, acid and alkali corrosion resistance, sliding properties, and thermal stability. Therefore, improving the comprehensive performance of polypropylene power cable protection pipes through filler modification or blending modification to obtain power cable protection pipes with strong impact resistance, good electrical insulation, high mechanical strength, low friction coefficient, flame retardancy, smoke suppression, heat resistance, cold resistance, long service life, convenient construction, and superior performance-price ratio is currently a hot research topic.

[0004] Therefore, the high-voltage power protection pipes used in the market are basically modified polypropylene pipes, but they also have disadvantages such as insufficient hardness, low compressive strength, and the need to further improve their corrosion resistance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a modified polypropylene pipe for high-voltage power cable protection, which solves the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A modified polypropylene pipe for high-voltage power cable protection includes: polypropylene material, characterized in that the pipe is divided into three layers: an outer layer, a middle layer and an inner layer, wherein the outer circular wall of the polypropylene material in the outer layer is coated with a polyurethane coating.

[0008] By adopting the above technical solution, the three-layer design allows for better observation of the overall material composition of the pipe. The polypropylene material is designed to withstand greater impact without easily breaking or being damaged. The polyurethane coating provides excellent elasticity and flexibility, adapting to the coating requirements of various shapes and curved surfaces while maintaining the integrity and aesthetics of the coating. It also offers excellent weather resistance and corrosion resistance, resisting climate change, ultraviolet radiation, and chemical corrosion, thus extending the service life of the pipe.

[0009] Preferably, glass fiber is fixedly installed on the inner circular wall of the outer polypropylene material.

[0010] By adopting the above technical solution and incorporating glass fiber, the pipeline exhibits high tensile strength and can absorb significant impact energy within its elastic limits. This significantly enhances the pipeline's rigidity, enabling it to withstand damage caused by external pressure and foundation settlement. This high-strength characteristic ensures the pipeline's stability and safety in complex environments.

[0011] Preferably, an aluminum mesh is fixedly installed on the inner circular wall of the outer layer of glass fiber.

[0012] By adopting the above technical solution, an aluminum mesh can be used as a shielding layer to effectively reduce signal attenuation and interference, ensuring stable signal transmission. At the same time, a dense aluminum oxide film can easily form on the aluminum surface, which can protect the aluminum from external environmental corrosion, improve the corrosion resistance of the pipe, and enhance its durability in humid, acidic, or alkaline environments. Moreover, due to the high durability and corrosion resistance of aluminum, its failure rate is relatively low, reducing maintenance costs.

[0013] Preferably, a polyethylene material is fixedly installed on the inner circular wall of the aluminum mesh, and the polyethylene material is the middle layer.

[0014] By adopting the above technical solution, the use of polyethylene material is intended to resist the erosion of natural factors such as ultraviolet radiation, maintain long-term stable performance, and at the same time have good insulation properties, effectively isolating current and preventing current leakage and loss. It can also withstand certain tensile, compressive and bending forces. These characteristics ensure stability and reliability during installation and operation, and reduce damage caused by external forces.

[0015] Preferably, a modified polypropylene material is fixedly installed on the inner circular wall of the polyethylene material, and the modified polypropylene material is the inner layer.

[0016] By adopting the above technical solution and setting the modified polypropylene material, the pipe has higher stability and durability when subjected to external pressure and impact, extending the service life of the pipe. At the same time, the dielectric loss is also lower, which helps to reduce signal loss during transmission and improve signal transmission efficiency and quality.

[0017] Preferably, the inner circular wall of the modified polypropylene material is coated with an insulating coating, which is an inner layer.

[0018] By adopting the above technical solution, the insulating coating is set as an insulating layer for the pipe, providing additional insulation protection. This insulating layer can effectively isolate current, prevent current leakage and loss, and improve the electrical performance and safety of the pipe.

[0019] In summary, the present invention has the following main advantages:

[0020] By employing a three-layer design, not only is the structural strength of the pipe enhanced, but the ease of observation of its internal materials is also improved, ensuring the overall quality of the materials used. Polypropylene serves as the primary load-bearing layer; its high strength and toughness allow the pipe to withstand significant impact without easily breaking or being damaged, extending its service life. The polyurethane coating provides excellent elasticity and flexibility, ensuring a perfect fit to pipe surfaces of various shapes and curves while maintaining the coating's integrity and aesthetics. Its outstanding weather resistance and corrosion resistance also enhance the pipe's environmental adaptability. Glass fiber significantly improves the pipe's rigidity and strength, effectively resisting external pressure and foundation settlement, ensuring the pipeline's stability and safety in complex environments. In terms of safety, aluminum mesh, as a crucial component of signal transmission, effectively reduces signal attenuation and interference, ensuring stable signal transmission. Simultaneously, aluminum's corrosion resistance and low failure rate lower maintenance costs. Polyethylene material protects against erosion from natural factors such as ultraviolet radiation, maintaining long-term stable performance. Its excellent insulation properties prevent current leakage, ensuring electrical safety. Modified polypropylene material further optimizes the pipe's performance, exhibiting higher stability and durability under external pressure and impact, while reducing signal loss during transmission and improving signal quality. As an insulation and protective layer, the insulating coating not only enhances aesthetics but also strengthens insulation, further guaranteeing electrical safety and signal transmission quality. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the layered structure of this utility model.

[0023] Reference numerals: 1. Polypropylene material; 2. Polyethylene material; 3. Aluminum mesh; 4. Modified polypropylene material; 5. Glass fiber; 6. Polyurethane coating; 7. Insulating coating. Detailed Implementation

[0024] 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.

[0025] refer to Figure 1 and Figure 2 A modified polypropylene pipe for high-voltage power cable protection comprises: a polypropylene material 1, characterized in that the pipe is divided into three layers: an outer layer, a middle layer, and an inner layer. The outer circular wall of the polypropylene material 1 is coated with a polyurethane coating 6. The three layers allow for better observation of the overall material composition of the pipe. The polypropylene material 1 is designed to withstand greater impact forces without easily breaking or being damaged. The polyurethane coating 6 provides excellent elasticity and flexibility, adapting to various shapes and curved surfaces while maintaining the integrity and aesthetics of the coating. It also exhibits excellent weather resistance and corrosion resistance, resisting climate change, ultraviolet radiation, and chemical corrosion, thus extending the service life of the pipe. Glass fiber 5 is fixedly installed on the inner circular wall of the outer polypropylene material 1. By incorporating glass fiber 5, the pipe exhibits high tensile strength and can absorb significant impact energy within its elastic limit, thereby greatly enhancing its rigidity and enabling it to withstand damage caused by external pressure and foundation settlement. This high-strength characteristic ensures the stability and safety of the pipe in complex environments. An aluminum mesh 3 is fixedly installed on the inner circular wall of the outer glass fiber 5. This aluminum mesh 3 serves as a shielding layer, effectively reducing signal attenuation and interference, ensuring stable signal transmission. Simultaneously, a dense aluminum oxide film easily forms on the aluminum surface, protecting it from external environmental corrosion and improving the pipe's corrosion resistance and durability in humid, acidic, or alkaline environments. Furthermore, due to aluminum's high durability and corrosion resistance, its failure rate is relatively low, reducing maintenance costs.

[0026] refer to Figure 1 and Figure 2Preferably, a polyethylene material 2 is fixedly installed on the inner circular wall of the aluminum mesh 3. The polyethylene material 2 serves as the middle layer. The polyethylene material 2 is used to resist the erosion of natural factors such as ultraviolet radiation, maintaining long-term stable performance. It also has good insulation properties, effectively isolating current and preventing current leakage and loss. Furthermore, it can withstand certain tensile, compressive, and bending forces. These characteristics ensure stability and reliability during installation and operation, reducing damage caused by external forces. A modified polypropylene material 4 is fixedly installed on the inner circular wall of the polyethylene material 2. Material 4 is the inner layer. The modified polypropylene material 4 is used to make the pipe more stable and durable when subjected to external pressure and impact, extending the service life of the pipe. At the same time, the dielectric loss is also smaller, which helps to reduce signal loss during transmission and improve signal transmission efficiency and quality. The inner circular wall of the modified polypropylene material 4 is coated with an insulating coating 7. The insulating coating 7 is an inner layer. The insulating coating 7 is set as an insulating layer of the pipe to provide additional insulation protection. This insulating layer can effectively isolate current, prevent current leakage and loss, and improve the electrical performance and safety of the pipe.

[0027] Working principle: Please refer to Figures 1-2 As shown, during use, the glass fiber 5 and aluminum mesh 3 in the pipe have high hardness and strength, and can withstand greater external forces and pressures. This means that during the laying process, the pipe can resist soil pressure, vehicle loads and possible construction damage, and be protected from physical wear and compression. At the same time, the polyurethane coating 6 and the insulating coating 7 have good electrical insulation properties, which can effectively isolate the cable from electrical contact with the external environment and prevent electrical faults such as current leakage or short circuits. This is crucial for ensuring the stable operation of power and communication systems.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modified polypropylene pipe for high-voltage power cable protection, comprising: The polypropylene material (1) is characterized in that the pipe is divided into three layers: an outer layer, a middle layer and an inner layer, and the outer circular wall of the polypropylene material (1) is coated with a polyurethane coating (6).

2. The modified polypropylene pipe for high-voltage power cable protection according to claim 1, characterized in that, Glass fiber (5) is fixedly installed on the inner circular wall of the outer polypropylene material (1).

3. The modified polypropylene pipe for high-voltage power cable protection according to claim 2, characterized in that, An aluminum mesh (3) is fixedly installed on the inner circular wall of the outer layer of glass fiber (5).

4. The modified polypropylene pipe for high-voltage power cable protection according to claim 3, characterized in that, The inner circular wall of the aluminum mesh (3) is fixedly installed with polyethylene material (2), and the polyethylene material (2) is the middle layer.

5. A modified polypropylene pipe for high-voltage power cable protection according to claim 4, characterized in that, The inner wall of the polyethylene material (2) is fixedly fitted with a modified polypropylene material (4), which is the inner layer.

6. A modified polypropylene pipe for high-voltage power cable protection according to claim 5, characterized in that, The inner wall of the modified polypropylene material (4) is coated with an insulating coating (7), which is the inner layer.

Images