Cable tube for easy installation in a fluid environment

Abstract

The utility model discloses cable pipe body convenient to install in fluid environment, including inner insulating layer, middle water -resisting layer and outer sheath layer, the outer sheath layer includes weather -resistant halogen -free flame -retardant polyolefin layer, weather -resistant halogen -free flame -retardant polyolefin layer outside is provided with sharkskin bionic micro -groove texture. The utility model has the advantages and effects that: through setting up sharkskin bionic micro -groove structure in the outer wall of cable pipe body, for cable in the air erection or underwater laying reduces the traction and the cable resistance of pulling, and the cable is convenient to carry out the stretch in above -mentioned scene, significantly reduced fluid resistance, enhanced anti -vibration ability, promoted laying efficiency and safety, prolonged system life and reduced the whole life -cycle cost.

Description

Technical Field

[0001] This utility model relates to the field of cable conduit technology, and in particular to a cable conduit that is convenient for installation in fluid environments. Background Technology

[0002] Fluid resistance is a key engineering challenge when cable conduits are installed across fluid environments (air or water). It directly affects the safety, stability, and lifespan of the structure.

[0003] Traditionally, the resistance problem of cable ducts installed in fluids has been addressed through experimental, empirical methods and conservative static design. However, accurately predicting complex environmental loads and designing structural systems capable of withstanding these loads is affected by various factors, making it difficult to guarantee stability and reducing the reliability of cable duct installation. Utility Model Content

[0004] The purpose of this invention is to provide a cable conduit that is easy to install in a fluid environment.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a cable conduit body that is convenient for installation in a fluid environment, characterized in that: it includes an inner insulation layer, a middle water-blocking layer and an outer sheath layer, wherein the outer sheath layer includes a weather-resistant halogen-free flame-retardant polyolefin layer, and the weather-resistant halogen-free flame-retardant polyolefin layer is provided with a sharkskin biomimetic microgroove texture.

[0006] Further configured as follows: the sharkskin biomimetic microgroove texture includes a substrate, on which multiple sets of repeating parallel and equally spaced convex ribs and grooves are provided, the convex ribs and grooves together constituting the microgroove texture.

[0007] The rib is further configured to extend in the same direction as the main flow direction of the fluid.

[0008] Further configuration: the lateral distance of the rib cross section extends from large to small, the upper edge of the rib is arc-shaped on both sides, and the cross section of the groove is U-shaped.

[0009] The inner insulating layer is further configured as a nano-ceramicized silicone rubber layer.

[0010] The further configuration is as follows: the intermediate water-blocking layer is a halogen-free flame-retardant polyolefin layer, and the halogen-free flame-retardant polyolefin layer is wrapped with a completely dry water-blocking layer.

[0011] Further configured as follows: the weather-resistant halogen-free flame-retardant polyolefin layer includes a polyethylene fiber woven mesh, a polyurethane elastic layer is disposed outside the polyethylene fiber woven mesh, and the "sharkskin" biomimetic microgroove texture is disposed outside the polyurethane elastic layer.

[0012] In summary, this utility model has the following beneficial effects: by setting a sharkskin-inspired microgroove structure on the outer wall of the cable conduit, the traction force and cable pulling resistance are reduced when the cable is laid in the air or underwater, making it easier for the cable to stretch in the above scenarios, significantly reducing fluid resistance, enhancing vibration resistance, improving laying efficiency and safety, extending system life and reducing total life cycle cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the cross-sectional structure of the cable conduit. Figure 2 This is a schematic diagram of the biomimetic microgroove texture of shark skin.

[0014] In the diagram: 1. Inner insulation layer; 11. Nano-ceramicized silicone rubber layer; 2. Middle water-blocking layer; 21. Halogen-free flame-retardant polyolefin layer; 22. Fully dry water-blocking layer; 3. Outer sheath layer; 31. Weather-resistant halogen-free flame-retardant polyolefin layer; 311. Polyethylene fiber woven mesh; 312. Polyurethane elastic layer; 32. Shark skin biomimetic microgroove texture; 321. Substrate; 322. Raised ribs; 323. Groove. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] A cable conduit for easy installation in fluid environments, comprising an inner insulation layer 1, a middle water-blocking layer 2, and an outer sheath layer 3.

[0017] The inner insulation layer 1 is a nano-ceramicized silicone rubber layer 11, which covers the outside of the inner core. At room temperature, it exhibits similar softness, elasticity, and insulation properties to ordinary silicone rubber. However, when exposed to flames or temperatures above 500 degrees Celsius, it undergoes a dramatic change in chemical and physical state, transforming from an elastomer into a hard, dense ceramic-like protective layer, thereby preventing further erosion from flames or high temperatures.

[0018] The intermediate water-blocking layer 2 is a halogen-free flame-retardant polyolefin layer 21, which is disposed outside the nano-ceramicized silicone rubber layer 11. This halogen-free flame-retardant polyolefin layer 21 uses polyethylene or polypropylene resin as a matrix, does not contain halogen elements such as chlorine or bromine, and can inhibit, delay, or terminate the spread of flames, providing initial mechanical protection and flame retardancy, offering additional protection for life and property in a fire.

[0019] A halogen-free flame-retardant polyolefin layer 21 is wrapped with a fully dry water-blocking layer 22. The core of the water-blocking effect of the water-blocking yarn lies in its water-swelling property. Once water penetrates, superabsorbent polymer (SAP) will rapidly absorb the water, expanding its volume by tens or even hundreds of times in a short period of time. The expanded SAP forms a dense gel-like substance, which can effectively block all longitudinal gaps and pores inside the cable, thereby preventing water from spreading further along the axial and radial directions of the cable.

[0020] Compared to the traditional "grout-filled" water-blocking method, which involves filling gaps in traditional cables with grout to physically block water, this method is effective but suffers from drawbacks such as heavy weight, cumbersome installation (requiring grout cleaning), and poor environmental performance. The heavy weight of traditional grout-filled cables also affects their placement in fluid environments.

[0021] The outer sheath layer 3 includes a weather-resistant halogen-free flame-retardant polyolefin layer 3121, which comprises a polyethylene fiber woven mesh 311. A polyurethane elastic layer 312 is disposed outside the polyethylene fiber woven mesh 311. In this structure, the polyethylene fiber woven mesh 311 is first disposed outside the fully dry water-blocking layer 22. After the polyethylene fiber woven mesh 311 is disposed, the polyurethane material of the polyurethane elastic layer 312 is extruded through an extruder, thereby realizing the outer sheath layer 3. The polyethylene fiber woven mesh 311 has excellent abrasion resistance, forming the backbone of the outer sheath layer 3, responsible for resisting cutting, tearing, and continuous friction. The polyurethane elastomer acts as the muscle and skin filling, providing excellent cushioning, weather resistance, oil resistance, and flexibility.

[0022] A sharkskin-inspired microgroove texture 32 is provided on the outside of the polyurethane elastic layer 312. The sharkskin-inspired microgroove texture 32 includes a substrate 321, which is the outside of the polyurethane elastic layer 312.

[0023] The substrate 321 is provided with multiple sets of repeating, parallel, and equally spaced protruding ribs 322 and grooves 323, which together form a microgroove texture. The lateral distance of the cross-section of the protruding ribs 322 extends from large to small, and the upper edges of the protruding ribs 322 are arc-shaped. The cross-section of the grooves 323 is U-shaped. This structure can reduce the frictional force when dragging and laying in fluid, thereby achieving the purpose of stretching the cable conduit.

[0024] The sharkskin-inspired microgroove texture 32 structure is formed by pressing the extruded smooth sheath with a roller bearing the corresponding texture before it has completely cooled. During the pressing process, the extension direction of the ribs 322 is configured to align with the mainstream direction of the fluid, primarily in the lateral and vertical directions. Alternatively, a film with the sharkskin-inspired microgroove texture 32 can be used for covering to achieve the same function.

[0025] In the vertical embossing type, the extension direction of the rib 322 is the same as the extension direction of the tube body. In the lateral type, the sharkskin microgroove texture surrounds the tube body, and the extension direction of the rib 322 is perpendicular to the extension direction of the tube body.

[0026] It should be noted that, in the traditional industry terminology, sharkskin refers to defects caused by unstable extrusion processes, resulting in rough and irregular surfaces that can impair product performance; however, the sharkskin-inspired microgroove structure in this application is meticulously designed, and there is a fundamental difference between the two.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A cable conduit body that is convenient for installation in fluid environments, characterized in that: It includes an inner insulation layer, a middle water-blocking layer, and an outer sheath layer. The outer sheath layer includes a weather-resistant halogen-free flame-retardant polyolefin layer. The weather-resistant halogen-free flame-retardant polyolefin layer is provided with a sharkskin-inspired microgroove texture. The sharkskin-inspired microgroove texture includes a substrate on which multiple sets of repeating parallel and equally spaced ribs and grooves are provided. The ribs and grooves together constitute the microgroove texture.

2. The cable conduit body for convenient installation in a fluid environment according to claim 1, characterized in that: The extension direction of the rib is configured to be consistent with the mainstream direction of the fluid.

3. The cable conduit body for convenient installation in a fluid environment according to claim 1, characterized in that: The lateral distance of the rib cross section extends from large to small, the upper edge of the rib is arc-shaped on both sides, and the cross section of the groove is U-shaped.

4. The cable conduit body for convenient installation in a fluid environment according to claim 1, characterized in that: The inner insulating layer is a nano-ceramicized silicone rubber layer.

5. The cable conduit body for convenient installation in a fluid environment according to claim 1, characterized in that: The intermediate water-blocking layer is a halogen-free flame-retardant polyolefin layer, and the halogen-free flame-retardant polyolefin layer is wrapped with a completely dry water-blocking layer.

6. The cable conduit body for convenient installation in a fluid environment according to claim 1, characterized in that: The weather-resistant, halogen-free, flame-retardant polyolefin layer includes a polyethylene fiber woven mesh, with a polyurethane elastic layer disposed outside the polyethylene fiber woven mesh, and the sharkskin biomimetic microgroove texture disposed outside the polyurethane elastic layer.

Images