Silicone composite tube with a hooking braid structure

Abstract

This utility model relates to the field of silicone tube technology, specifically a silicone composite tube with a hook-and-braid structure. A silicone composite tube with a hook-and-braid structure includes an inner silicone layer, a braided fiber layer, and an outer silicone layer. The braided fiber layer is formed by hook-and-braiding high-strength fibers into several continuous braided units that surround the outer surface of the inner silicone layer. Adjacent braided units are interconnected to form a stable mesh structure. The outer silicone layer is integrally formed on the surface of the inner silicone layer and covers the braided fiber layer. The hook-and-braid structure makes the connection between the fibers more stable, and under external force, it can better disperse stress, effectively improving the overall strength and tensile strength of the silicone composite tube.

Description

Technical Field

[0001] This utility model relates to the field of silicone tube technology, specifically a silicone composite tube with a hook-and-braid structure. Background Technology

[0002] In modern industrial and civilian applications, silicone composite pipes are widely used in food and beverage transportation, medical equipment, and chemical fluid transmission due to their excellent flexibility and chemical stability. However, the braided structure of traditional silicone composite pipes has significant defects, making it difficult to meet increasingly stringent usage requirements. Existing silicone composite pipes often use plain or twill braiding processes for their fiber braided layers, with the fibers simply interlaced for fixation, resulting in a loose connection. When the pipe is subjected to pressure, tension, or bending, stress concentrates at the fiber intersections and cannot be effectively dispersed. For example, in high-pressure filling processes for food and beverages, internal pressure can easily cause localized deformation of the braided layer. Over long-term use, the fibers loosen, leading to interlayer separation. Furthermore, frequent thermal expansion and contraction and external tensile forces accelerate the damage to the braided structure, causing a rapid decrease in pipe strength and even rupture and leakage. In addition, ordinary braided structures cannot effectively enhance material properties. Even with high-strength fibers, unstable connections prevent the full utilization of material advantages, severely limiting the reliability and service life of silicone composite pipes under complex operating conditions. Utility Model Content

[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0004] A silicone composite tube with a hook-and-stretch structure includes an inner silicone layer, a braided fiber layer, and an outer silicone layer. The braided fiber layer is formed by hook-and-stretching high-strength fiber threads into several continuous braided units that surround the outer surface of the inner silicone layer. Adjacent braided units are interlocked to form a stable mesh structure. The outer silicone layer is integrally formed on the surface of the inner silicone layer and covers the braided fiber layer.

[0005] Furthermore, the fiber yarn is selected from one of aramid fiber yarn, glass fiber yarn, or carbon fiber yarn.

[0006] Furthermore, the outer surface of the inner silicone layer is provided with several uniformly distributed protrusions that match the shape of the braided unit, and the braided fiber layer is tightly attached to the outer surface of the inner silicone layer and embedded in the groove formed between adjacent protrusions.

[0007] Furthermore, the unit shape is rectangular or prismatic.

[0008] Furthermore, the inner silicone layer has several anti-torsional reinforcing ribs arranged along its length.

[0009] Furthermore, the inner surface of the inner silicone layer and the outer surface of the outer silicone layer are each provided with an anti-corrosion coating.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the hook-and-loop braid structure makes the connection between the fiber threads more stable, and can better disperse stress when subjected to external force, effectively improving the overall strength and tensile properties of the silicone composite tube.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the inner silicone layer in this utility model. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Please see Figures 1-2 A hook-and-loop braided silicone composite tube includes an inner silicone layer 1, a braided fiber layer 2, and an outer silicone layer 3. The braided fiber layer 2 is formed by hook-and-loop braiding high-strength fibers into several continuous braided units that surround the outer surface of the inner silicone layer 1. Adjacent braided units are interconnected to form a stable mesh structure. The outer silicone layer 3 is integrally molded onto the surface of the inner silicone layer 1 and covers the braided fiber layer 2. The hook-and-loop braided structure makes the connection between the fibers more stable and can better disperse stress when subjected to external forces, effectively improving the overall strength and tensile properties of the silicone composite tube. The outer silicone layer 3 is integrally molded onto the surface of the inner silicone layer 1 through a molding process, completely covering the braided fiber layer 2. This not only protects the braided fiber layer 2 but also further enhances the structural stability of the composite tube.

[0017] Furthermore, the fiber thread is selected from aramid fiber, glass fiber, or carbon fiber. Aramid fiber thread possesses high strength, low density, high temperature resistance (can be used for extended periods at 260℃), and flame retardancy, making it suitable for high-temperature applications requiring high strength and flame retardancy, such as industrial high-temperature fluid transportation. Glass fiber thread exhibits good chemical stability and excellent resistance to corrosion from acids, alkalis, and salts, making it suitable for transporting corrosive fluids in the chemical industry. Carbon fiber thread combines high strength and lightweight advantages, and is often used in scenarios where weight is strictly limited while high strength support is required, such as fluid transportation in aerospace equipment. Those skilled in the art can flexibly select appropriate fiber thread materials based on specific application scenarios and performance requirements to meet the requirements of different working conditions.

[0018] Furthermore, the outer surface of the inner silicone layer 1 is provided with several uniformly distributed protrusions 4 that match the shape of the braided unit. The braided fiber layer 2 is tightly attached to the outer surface of the inner silicone layer 1 and embedded in the grooves formed between adjacent protrusions 4. Specifically, after the inner silicone layer 1 is molded and extruded, the shape of the protrusions 4 can be processed on its surface according to the shape of the braided unit by means of ring cutting, or the protrusions 4 and groove structure can be pressed out before the silicone is completely cured. The braided fiber layer 2 is embedded in the grooves between adjacent protrusions 4, and then the outer silicone layer 3 is formed on its surface by molding and extrusion. The contact area between the inner silicone layer 1 and the braided fiber layer 2 and the outer silicone layer 3 is increased by mechanical interlocking, which effectively improves the interlayer bonding force and further improves the structural stability of the composite tube.

[0019] Furthermore, the braided unit shapes are rectangular or prismatic. Rectangular braided units provide better tensile strength in the axial direction of the composite pipe, suitable for applications requiring resistance to large axial tensile forces, such as resisting axial tensile forces in long-distance pipeline transportation. Prismatic braided units, on the other hand, have better compressive strength in the circumferential direction, effectively resisting external pressure, and are suitable for scenarios requiring resistance to large external pressure, such as buried pipelines or pipeline applications in deep-sea environments. Both shapes of braided units can be used individually or alternately according to actual usage requirements. When arranged alternately, by rationally designing the arrangement order and proportion of rectangular and prismatic units, the composite pipe can possess good mechanical properties in both the axial and circumferential directions, achieving anisotropic enhancement and meeting the diverse performance requirements of pipelines under complex working conditions.

[0020] Furthermore, the inner silicone layer 1 contains several anti-torsional reinforcing ribs 6 arranged along its length. These ribs 6 are made of high-strength materials, such as 304 stainless steel wire or high-strength aramid fiber bundles, and are embedded in the inner silicone layer 1. During production, an embedding process is used, where the pre-arranged anti-torsional reinforcing ribs 6 are simultaneously embedded during silicone injection molding, ensuring accurate positioning and secure fixation. When the composite tube is subjected to torsional force, the anti-torsional reinforcing ribs 6 effectively resist torsional stress, distributing the torsional force throughout the entire composite tube structure and preventing damage due to excessive torsion.

[0021] Furthermore, both the inner surface of the inner silicone layer 1 and the outer surface of the outer silicone layer 3 are provided with anti-corrosion coatings 7. The anti-corrosion coating 7 on the inner surface of the inner silicone layer 1 is made of polytetrafluoroethylene (PTFE). During the production of the inner silicone layer 1, after it has been molded and cooled to room temperature, a PTFE dispersion is continuously injected into the inner silicone layer 1 to ensure that the PTFE is uniformly adhered to the inner wall of the inner silicone layer 1, followed by drying. PTFE has excellent chemical stability and hardly reacts with any chemical substances, effectively resisting the erosion of various corrosive transport media such as acids, alkalis, and organic solvents. This ensures that the inner silicone layer 1 is not corroded when transporting corrosive fluids, guaranteeing the purity of the fluid and the service life of the pipeline. The anti-corrosion coating 7 on the outer surface of the outer silicone layer 3 is made of graphene, applied through a spraying process. Graphene has excellent chemical stability and barrier properties, effectively blocking the penetration of corrosive media while enhancing the mechanical properties of the coating. This significantly improves the anti-corrosion performance of the outer silicone layer 3 while maintaining its flexibility.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A silicone composite tube with a hook-and-loop braid structure, comprising an inner silicone layer, a braided fiber layer, and an outer silicone layer, characterized in that, The braided fiber layer is formed by high-strength fiber threads through hook-and-loop weaving to form several continuous braided units that surround the outer surface of the inner silicone layer. Adjacent braided units are interlocked to form a stable mesh structure. The outer silicone layer is integrally formed on the surface of the inner silicone layer and covers the braided fiber layer. The inner silicone layer has several anti-torsional reinforcing ribs arranged along its length.

2. The silicone composite tube with a hook-and-braid structure according to claim 1, characterized in that, The fiber yarn is selected from aramid fiber yarn, glass fiber yarn or carbon fiber yarn.

3. The silicone composite tube with a hook-and-braid structure according to claim 1, characterized in that, The outer surface of the inner silicone layer has several uniformly distributed protrusions that match the shape of the braided unit. The braided fiber layer is tightly attached to the outer surface of the inner silicone layer and embedded in the groove formed between adjacent protrusions.

4. A silicone composite tube with a hook-and-wire braid structure according to claim 1 or 3, characterized in that, The unit shape is rectangular or rhomboid.

5. The silicone composite tube with a hook-and-braid structure according to claim 1, characterized in that, The inner surface of the inner silicone layer and the outer surface of the outer silicone layer are each provided with an anti-corrosion coating.

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