PE pipe for underground communication pipeline

Abstract

The utility model relates to communication pipeline technical field, concretely is a kind of PE pipe for underground communication pipeline. The PE pipe includes outer protective layer, reinforcing layer, inner layer, waterproof filling layer and built-in passage in proper order from outside to inside, the built-in passage is porous structure, for laying communication cable, and shielding layer is equipped outside each communication cable. Outer protective layer has good voltage resistance and corrosion resistance, reinforcing layer improves overall mechanical strength, waterproof filling layer effectively prevents groundwater infiltration, and shielding layer can shield electromagnetic interference signal. The pipe structure is reasonable, sealing is strong, communication stability is high, suitable for multi-strand optical cable or data line parallel laying, with good construction adaptability and use reliability.

Description

Technical Field

[0001] This utility model relates to the field of communication cable protection, and more specifically to a PE pipe for underground communication pipelines. Background Technology

[0002] With the rapid development of information and communication technologies, the coverage of communication networks is constantly expanding. As an important channel for laying communication cables, the structural performance of underground communication pipelines directly affects the operational stability and maintenance convenience of communication systems. Especially in areas with increasingly dense infrastructure such as urban construction, smart cities, rail transit, highways, and industrial parks, communication pipelines need to simultaneously meet multiple functions such as pressure resistance, waterproofing, corrosion resistance, and interference resistance in order to adapt to the complex and ever-changing underground environment.

[0003] Existing communication pipelines are typically made of polyethylene (PE) or polyvinyl chloride (PVC). While they possess certain mechanical strength and corrosion resistance, the following shortcomings have been exposed during long-term underground use: First, the single-layer structure cannot effectively disperse or mitigate damage caused by soil pressure, geological subsidence, or external impacts, easily leading to pipe deformation, cracking, or breakage. Second, poor waterproofing performance; groundwater infiltration or damp environments may cause cables to become damp, short-circuit, or experience signal attenuation. Third, the lack of effective spatial isolation between communication cables results in mutual interference, wear, or disordered arrangement. Fourth, in some complex electromagnetic environments, the pipelines lack necessary electromagnetic shielding structures, easily leading to unstable signal transmission or increased interference.

[0004] To address these issues, some communication conduits have attempted to incorporate reinforcing layers, waterproofing layers, or multi-channel structures in their design. However, these often suffer from increased costs, low processing efficiency, or insufficient lifespan due to unreasonable structural design, inappropriate material selection, or complex manufacturing processes, limiting their application and promotion in large-scale projects. Furthermore, traditional communication conduits largely lack modular and integrated design, which is detrimental to conduit construction, cabling management, and subsequent maintenance.

[0005] Therefore, there is an urgent need to develop a multi-layered composite underground communication pipeline with a reasonable structure, excellent performance, and controllable manufacturing process to improve its adaptability in underground laying environments, enhance cable protection and communication stability, and balance economy and practicality. Based on this, this utility model provides a PE pipe material for underground communication pipelines. Through a multi-functional layered design, it integrates protection, waterproofing, reinforcement, and anti-interference functions, providing a reliable, efficient, and durable physical infrastructure guarantee for communication systems. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a PE pipe for underground communication pipelines. Through a multi-layer composite structure and embedded channel design, it enhances the mechanical strength, waterproofness, and electromagnetic shielding performance, ensuring the stable operation of communication cables in complex underground environments.

[0007] To achieve the above objectives, this utility model provides a PE pipe for underground communication pipelines, comprising, from the outside to the inside: an outer protective layer, a reinforcing layer, an inner layer, a waterproof filling layer, an internal channel, and a shielding layer; wherein:

[0008] The outer protective layer has a ring structure and is made of high-strength polyethylene material. It is used for impact resistance, corrosion protection, and to disperse external pressure.

[0009] The reinforcing layer is located between the outer protective layer and the inner layer, tightly wrapping the inner layer. It is made of high-strength polyethylene and reinforcing fiber composite material and is used to improve the pipe's bending resistance and pressure resistance.

[0010] The inner layer is made of polyethylene and has a smooth tube wall structure to support the communication cable and reduce friction.

[0011] The waterproof filler layer is filled in the gap between the inner layer and the outer protective layer. It has a ring-shaped filling structure and is made of waterproof material to block external moisture.

[0012] The built-in channel is located in the center of the pipe and includes multiple channel cavities evenly arranged along the pipe axis. The channel has a hexagonal cross-section and is used to accommodate communication cables.

[0013] The shielding layer, made of metal or high-density polymer material, wraps around the communication cable inside each built-in channel to shield against electromagnetic interference.

[0014] Furthermore, the outer protective layer is thicker than the inner layer to enhance overall protective performance;

[0015] The reinforcing layer is a composite layer structure of glass fiber or carbon fiber and polyethylene;

[0016] The waterproof filler layer is a hot-melt waterproof colloid material that forms a closed ring-shaped package during filling.

[0017] The number of built-in channels is six, which are symmetrically distributed in a hexagonal pattern along the central axis;

[0018] The shielding layer is a copper foil layer or a high-density conductive polymer layer, forming a closed conductive ring;

[0019] The communication cable is an optical fiber cable or a multi-core communication cable, with a tensile layer and an insulating sheath outside the cable core.

[0020] As can be seen from the above technical solution, compared with the prior art, this utility model, through the reasonable arrangement of the multi-layer composite structure, not only improves the pressure resistance and impact resistance of the pipe, but also effectively blocks water vapor infiltration and electromagnetic interference through the setting of waterproof filling layer and shielding layer, thereby improving the stability and safety of the communication system operation, and is especially suitable for high-requirement urban underground communication network systems. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0023] 1-Outer protective layer, 2-Reinforcing layer, 3-Inner layer, 4-Waterproof filling layer, 5-Built-in channel, 6-Shielding layer, 7-Communication cable. 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. 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.

[0025] Example

[0026] like Figure 1 As shown, this utility model provides a PE pipe structure suitable for underground communication pipelines. The structure includes, from the outside to the inside: an outer protective layer 1, a reinforcing layer 2, an inner layer 3, a waterproof filling layer 4, an internal channel 5, and a shielding layer 6. The structural layers cooperate with each other in function to form a communication pipeline with high strength, waterproofness, and electromagnetic shielding capabilities.

[0027] The outer protective layer 1 has a ring structure and is made of high-strength polyethylene material (such as HDPE) through extrusion or molding processes. The main function of the outer protective layer 1 is to resist harsh environmental factors such as underground soil pressure, rock impact, and acid and alkali corrosion. In terms of structural design, the thickness of the outer protective layer 1 is greater than that of the inner layer 3, effectively serving as an external barrier. Its thickness is preferably 4–10 mm to meet the requirements for use at different burial depths.

[0028] To enhance its compressive strength, the surface of the outer protective layer 1 may be provided with a reinforcing rib structure, which extends along the axial or spiral direction of the pipe to improve its resistance to circumferential deformation.

[0029] The reinforcing layer 2 is tightly attached to the inner side of the outer protective layer 1 between the inner layer 3 and the outer protective layer 1, and is made of high-strength polyethylene and reinforcing fiber material. In this embodiment, the reinforcing material can be glass fiber or carbon fiber tow, which is melt-co-extruded with polyethylene or combined through a thermal composite process to form a reinforcing composite layer.

[0030] The reinforcing layer 2 primarily enhances the bending and compressive strength of the entire pipe, especially when laid underground in tortuous or uneven terrain. Reinforcing layer 2 effectively prevents the pipe from cracking or collapsing under prolonged stress. The thickness of reinforcing layer 2 is typically controlled between 1 and 3 mm, and its fiber direction can be configured as circumferential, longitudinal, or staggered woven as needed to form a three-dimensional spatial reinforcement structure.

[0031] The inner layer 3 is located inside the reinforcing layer 2 and has a smooth pipe structure, made of polyethylene material. The polyethylene material can be linear low-density polyethylene (LLDPE) or high-density polyethylene (HDPE), possessing good weather resistance and oxidation resistance. Its main function is to support the laying of the communication cable 7 and provide a low-friction operating channel.

[0032] To further reduce optical cable friction loss, the inner wall of the inner layer 3 can be made with micron-level drag-reducing textures by physical drawing or spraying methods, or a low-friction coating (such as fluoropolymer, silicone oil coating, etc.) can be applied to achieve smooth movement when the cable is pushed.

[0033] In this embodiment, the waterproof filler layer 4 is disposed between the inner layer 3 and the outer protective layer 1, filling the cavity between them, and forming an overall ring-shaped encapsulation structure. The waterproof filler layer can be made of a hot-melt waterproof adhesive material, such as polyolefin-based hot-melt adhesive, butyl rubber colloid, or other elastic sealing materials. This material softens when heated during construction, filling all tiny gaps, and forms a sealed waterproof encapsulation layer after cooling.

[0034] The main function of the waterproof filler layer 4 is to prevent surface water or groundwater from seeping into the interior of the pipe through the gaps, making it particularly suitable for buried areas in rainy, high-water-table, or saline-alkali soil environments. This structure also enhances the overall flexibility of the pipe, maintaining stable sealing even under thermal expansion and contraction.

[0035] One of the core technologies of this invention lies in the uniquely structured built-in channel 5. This channel is located in the central region of the pipe and has a porous, hollow structure composed of multiple channel cavities. In this embodiment, the built-in channel 5 comprises six independent channel units, symmetrically distributed in a regular hexagonal pattern along the central axis of the pipe.

[0036] Each channel cavity has a regular hexagonal cross-section, which is easier to process and group than a circle, and provides higher space utilization per unit area. The built-in channel 5 is integrally extruded from polyethylene material using a hollow molding process. The channel wall thickness is moderate, which ensures mechanical strength while maximizing the space for laying communication cables.

[0037] The design of this multi-channel structure allows users to flexibly lay multiple communication cables according to their needs, enabling functions such as multiple channels in the same conduit and redundancy backup, which greatly improves the construction efficiency of communication networks and the system redundancy capability.

[0038] To prevent external electromagnetic interference signals from affecting the transmission of the communication cable, this invention provides a shielding layer 6 inside each built-in channel 5 that surrounds the outside of the communication cable 7.

[0039] The shielding layer 6 can be made of metal foil (such as copper foil or aluminum foil) or high-density conductive polymer material. In this embodiment, copper foil is preferred as the shielding layer, with a thickness controlled between 0.05 and 0.2 mm, and the wrapping structure is spiral winding or 360° closed wrapping. This structure forms a closed conductive ring, which can effectively shield signals such as power frequency interference and high-frequency electromagnetic wave interference, ensuring stable transmission of communication signals.

[0040] In addition, to enhance shielding performance, an insulation layer can be installed between the copper foil shielding layer and the communication cable, and connected to the system grounding wire through a grounding structure, thereby forming a complete anti-interference path.

[0041] In practical applications, the communication cable 7 is installed by the construction unit according to the system design requirements, and can be fiber optic cable, coaxial cable, digital data cable, etc. Each communication cable is introduced through a corresponding built-in channel 5 and wrapped in its outer shielding layer 6.

[0042] The inner layer 3's support structure ensures that the cable does not directly contact the reinforcing layer and protective layer, effectively preventing signal jitter caused by changes in ambient temperature or external pressure. During construction, the communication cable 7 can be smoothly inserted using tools such as the pre-installed cable guide and cable blower in the conduit, improving efficiency and reducing losses.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. PE pipes for underground communication pipelines, characterized in that, It includes, from the outside to the inside, the following layers arranged sequentially: an outer protective layer (1), a reinforcing layer (2), an inner layer (3), a waterproof filling layer (4), an internal channel (5), and a shielding layer (6); wherein: The outer protective layer (1) has a ring structure and is made of high-strength polyethylene material. It is used for impact resistance, corrosion protection, and dispersing external pressure. The reinforcing layer (2) is located between the outer protective layer (1) and the inner layer (3), tightly wrapping the inner layer (3). It is made of high-strength polyethylene and reinforcing fiber composite material, and is used to improve the bending resistance and pressure resistance of the pipe. The inner layer (3) is made of polyethylene material and has a smooth tube wall structure to support the communication cable (7) and reduce friction; The waterproof filling layer (4) is filled in the gap between the inner layer (3) and the outer protective layer (1). It is a ring-shaped filling structure and is made of waterproof material to block external moisture. The built-in channel (5) is located at the center of the pipe and includes multiple channel cavities evenly arranged along the pipe axis. The channel cross-section is a hexagonal structure, used to accommodate the communication cable (7). The shielding layer (6) is wrapped around the communication cable (7) inside each of the built-in channels (5) and is made of metal or high-density polymer material to shield against electromagnetic interference.

2. The PE pipe for underground communication pipelines according to claim 1, characterized in that: The outer protective layer (1) is thicker than the inner layer (3) to enhance the overall protective performance.

3. The PE pipe for underground communication pipelines according to claim 1, characterized in that: The reinforcing layer (2) is a composite layer structure of glass fiber or carbon fiber and polyethylene.

4. The PE pipe for underground communication pipelines according to claim 1, characterized in that: The waterproof filler layer (4) is a hot-melt waterproof colloid material, which forms a closed ring-shaped package when filled.

5. The PE pipe for underground communication pipelines according to claim 1, characterized in that: The number of built-in channels (5) is six, which are symmetrically distributed in a hexagonal shape along the central axis.

6. The PE pipe for underground communication pipelines according to claim 1, characterized in that: The shielding layer (6) is a copper foil layer or a high-density conductive polymer layer, forming a closed conductive ring.

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