Extruded thermal insulation silicone sleeve

Abstract

The utility model belongs to pipeline technical field especially, it relates to a kind of extruded heat insulation silica gel sleeve, including the silica gel base material layer enclosed into tubular, ceramicized silicone rubber layer is provided on the silica gel base material layer outer surface, carbon black silica gel layer is provided on the ceramicized silicone rubber layer outer surface, the silica gel base material layer platinum gold vulcanization treatment, improve heat insulation performance by the above structure setting.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline technology, and in particular relates to an extruded heat-insulating silicone sleeve. Background Technology

[0002] Silicone tubing is a type of silicone material processed through an extrusion process using silicone products as the base material, applied to the protection of pipelines in equipment. With industrial development, the protection of equipment pipelines in high-temperature environments has become a critical issue. For example, in the field of new energy vehicles, the protection of liquid cooling pipes for power batteries is paramount. High temperatures or leaks can lead to thermal runaway and fires in the batteries, jeopardizing life and property.

[0003] Ordinary silicone sleeves cannot simultaneously meet the requirements of high temperature resistance and heat insulation, as well as the special environmental requirements of wear resistance, corrosion resistance, non-sticking, flame retardancy, resistance to permanent compression deformation, and resistance to high humidity. For emerging industries with high requirements such as new energy vehicles and power batteries, ordinary silicone sleeves have many limitations and safety risks in practical applications.

[0004] In view of this, the research and development of this project aims to overcome the shortcomings of ordinary silicone sleeves and develop an extruded heat-insulating silicone sleeve that, while ensuring wear resistance, corrosion resistance, good cushioning, good flexibility, long service life, compression resistance, good resilience and mechanical strength, also provides high-temperature fire protection, fire prevention, and heat insulation. In emerging industries such as new energy vehicles and power batteries, this sleeve can prevent pipeline damage and leakage caused by high temperatures or fire, which could lead to battery thermal runaway and fire, endangering life and property. Utility Model Content

[0005] The purpose of this invention is to provide an extruded heat-insulating silicone sleeve, which aims to solve the technical problem of poor heat insulation performance of silicone sleeves in the prior art and improve the heat insulation performance of the sleeve.

[0006] To achieve the above objectives, this utility model provides an extruded heat-insulating silicone sleeve, comprising a silicone substrate layer forming a tube, a ceramicized silicone rubber layer disposed on the outer surface of the silicone substrate layer, a carbon black silicone layer disposed on the outer surface of the ceramicized silicone rubber layer, and the silicone substrate layer undergoing platinum vulcanization treatment.

[0007] Preferably, the silicone substrate layer, the ceramicized silicone rubber layer, and the carbon black silicone layer are co-extruded to form a sleeve.

[0008] Preferably, the thickness of the silicone substrate layer is in the range of 0.5mm-2.0mm.

[0009] Preferably, the thickness of the ceramicized silicone rubber layer is in the range of 1.0 mm to 3.0 mm.

[0010] Preferably, the thickness of the carbon black silicone layer is in the range of 0.3mm-1.0mm.

[0011] Preferably, a high-temperature resistant polymer film is provided on the outer surface of the carbon black silicone layer.

[0012] Preferably, the thickness of the high-temperature resistant polymer film is in the range of 0.05mm-0.2mm.

[0013] Preferably, a smooth polytetrafluoroethylene film layer is provided on the inner sidewall of the silicone substrate layer.

[0014] Preferably, the thickness of the polytetrafluoroethylene film layer is in the range of 0.03 mm to 0.15 mm.

[0015] The above-mentioned technical solutions in the extruded heat-insulating silicone sleeve provided by this utility model embodiment have at least one of the following technical effects:

[0016] This utility model discloses an extruded heat-insulating silicone sleeve, which is formed by overlapping a silicone substrate layer, a ceramicized silicone rubber layer, and a carbon black silicone layer to create a tubular shape. The silicone substrate layer is located inside the tube, and the ceramicized silicone rubber layer is located between the silicone substrate layer and the carbon black silicone layer. It has the following beneficial effects:

[0017] 1. Superior performance: Through a three-layer functional design, it achieves synergistic effects of flexible sealing, ultimate heat insulation and physical protection, with comprehensive performance far exceeding that of single-layer structure products.

[0018] 2. Safe and reliable: The interlayer is chemically bonded through co-extrusion and simultaneous vulcanization, resulting in strong bonding and no risk of delamination, thus ensuring the structural integrity and reliability of the product during long-term use.

[0019] 3. Environmentally friendly and durable: The platinum vulcanization system is environmentally friendly and non-toxic, and the outer carbon black silicone layer significantly improves the product's environmental resistance and service life.

[0020] 4. Advanced technology: Co-extrusion process can achieve one-time molding, with high production efficiency, controllable cost, and is suitable for large-scale industrial production. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0022] Figure 1 A cross-sectional view of an extruded heat-insulating silicone sleeve provided for an embodiment of this utility model.

[0023] The following are the labeling elements in the figure:

[0024] 10—Silicone substrate layer; 20—Ceramicized silicone rubber layer; 30—Carbon black silicone layer

[0025] 40—High-temperature resistant polymer film; 50—Polytetrafluoroethylene film layer. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below, with examples of the embodiments shown in the appendix. Figure 1 As shown, the same or similar reference numerals throughout denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0030] In one embodiment of this utility model, such as Figure 1As shown, an extruded heat-insulating silicone sleeve is provided, including a silicone substrate layer 10 formed into a tube shape, a ceramicized silicone rubber layer 20 disposed on the outer surface of the silicone substrate layer 10, a carbon black silicone rubber layer 30 disposed on the outer surface of the ceramicized silicone rubber layer 20, and the silicone substrate layer 10 undergoes platinum vulcanization treatment.

[0031] The extruded heat-insulating silicone sleeve of this utility model is formed into a tube by overlapping silicone substrate layer 10, ceramicized silicone rubber layer 20 and carbon black silicone layer 30. The silicone substrate layer 10 is located inside the tube, and the ceramicized silicone rubber layer 20 is located between the silicone substrate layer 10 and the carbon black silicone layer 30. It has the following beneficial effects:

[0032] 1. Superior performance: Through a three-layer functional design, it achieves synergistic effects of flexible sealing, ultimate heat insulation and physical protection, with comprehensive performance far exceeding that of single-layer structure products.

[0033] 2. Safe and reliable: The interlayer is chemically bonded through co-extrusion and simultaneous vulcanization, resulting in strong bonding and no risk of delamination, thus ensuring the structural integrity and reliability of the product during long-term use.

[0034] 3. Environmentally friendly and durable: The platinum vulcanization system is environmentally friendly and non-toxic, and the outer carbon black silicone layer 30 significantly improves the product's environmental resistance and service life.

[0035] 4. Advanced technology: Co-extrusion process can achieve one-time molding, with high production efficiency, controllable cost, and is suitable for large-scale industrial production.

[0036] In another embodiment of this utility model, such as Figure 1 As shown, the silicone substrate layer 10, the ceramicized silicone rubber layer 20, and the carbon black silicone layer 30 are co-extruded to form a sleeve. The functionality of each layer is determined at the initial design stage and precisely integrated into the final product through co-extrusion. No layer's performance is compromised by subsequent processing, ensuring the product achieves the optimal overall performance designed in theory. For example, the flexible intermediate insulation layer will not collapse under subsequent processing, the smooth inner film will not be damaged, and the thickness and uniformity of each layer can be precisely controlled.

[0037] In another embodiment of this utility model, such as Figure 1 As shown, the thickness of the silicone substrate layer 10 ranges from 0.5mm to 2.0mm, wherein the thickness of the silicone substrate layer 10 can be:

[0038] With an ultra-thin 0.5mm wall, the sleeve boasts superior flexibility and bending performance, making it the lightest and cheapest in terms of material cost. However, its compression resistance and mechanical strength are relatively weak, requiring extremely high precision in extrusion and coating processes. It is mainly used in applications where space is extremely limited and a very small bending radius is required, or in lightweight applications with stringent weight requirements, such as wire harness protection inside precision electronic equipment and micro-pipelines in the power systems of small drones.

[0039] At 0.8mm, it achieves a good balance between flexibility and mechanical strength, maintaining good softness and elasticity while providing considerable compressive strength and abrasion resistance. Its manufacturing feasibility is better than the 0.5mm design, making it suitable for liquid cooling pipelines in most new energy vehicle battery packs, electric drive system wiring harnesses, and fluid pipelines in industrial robot articulated arms, balancing performance and cost.

[0040] With a thickness of 1.2mm, mechanical strength, resistance to permanent compression deformation, and abrasion resistance are significantly improved, providing more reliable cushioning and sealing effects. Flexibility is slightly reduced, requiring a larger bending radius. It is suitable for environments with slight friction risks or requiring stronger structural support, such as pipeline protection located at the bottom of battery packs or with relatively moving parts, equipment pipelines in outdoor communication base stations, and ground cable sheaths that need to withstand some trampling.

[0041] With a thickness of 1.6mm, this heavy-duty protective sleeve boasts excellent mechanical strength and resistance to impact and compression, effectively resisting external mechanical damage. Its high rigidity and low flexibility make it ideal for harsh industrial environments or locations with high-frequency vibration and high mechanical stress risks, such as hydraulic lines in construction machinery, conveying pipelines in mining equipment, and pipelines on the chassis of new energy vehicles susceptible to stone impacts.

[0042] With an ultra-thick protective design of 2.0mm, it provides maximum mechanical protection and cushioning sealing effect, with excellent durability. However, the casing is very rigid, difficult to bend, and has the highest weight and material cost. It is used for pipeline protection under extremely harsh working conditions and is the preferred solution to cope with strong impacts, abrasion, and compression. For example, pipelines on oil drilling platforms, air brake lines of heavy trucks, and exposed pipelines of equipment that need to cross complex terrain.

[0043] In another embodiment of this utility model, such as Figure 1 As shown, the thickness of the ceramicized silicone rubber layer 20 ranges from 1.0 mm to 3.0 mm. The thickness of the ceramicized silicone rubber layer 20 can be:

[0044] With a thickness of 1.0mm, it can quickly form a ceramic protective layer under the impact of open flame, effectively blocking the short-term transfer of heat. This thickness maintains the good overall flexibility and lightweight characteristics of the sleeve, and the cost is relatively low. It is mainly used in occasions where the expected thermal risk is low or space is strictly limited, such as fireproof wrapping of wiring harnesses inside consumer electronics products, short-term heat insulation of heating elements in household appliances, and protection of secondary circuits inside aerospace vehicles where weight is sensitive.

[0045] At 1.5mm, it achieves an excellent balance between thermal insulation performance and flexibility, significantly improving fire resistance and thermal barrier effect, and can more effectively delay thermal shock. At the same time, the sleeve still has good bending performance and is not too rigid. It is suitable for liquid cooling pipelines and high-voltage wiring harnesses in most new energy vehicle battery packs, insulation protection of battery module connection pieces inside energy storage cabinets, and pipe insulation in industrial equipment.

[0046] With a thickness of 2.0mm, it provides reliable and durable thermal and fire-resistant protection. The insulation layer formed after ceramicization is thicker and stronger, which can greatly delay the spread of thermal runaway. The mechanical compressive strength is further improved, but the rigidity of the sleeve begins to increase significantly. It is suitable for scenarios with clear thermal runaway risks and a certain protection time required, such as commercial electric vehicle battery packs, data center server coolant pipelines, and pipelines in chemical equipment that require both thermal insulation and fire protection.

[0047] With a thickness of 2.5mm, it offers outstanding thermal insulation performance, providing fire resistance for tens of minutes, thus buying valuable time for safe escape and activation of fire extinguishing measures. The casing is relatively rigid with a large bending radius, making it suitable for critical components with extremely high safety requirements, such as power battery systems in public transportation vehicles (e.g., electric buses, subways), fire barriers inside battery compartments of large energy storage power stations, and pipeline protection in high-risk areas of oil platforms.

[0048] At 3.0mm, it provides the maximum achievable thermal insulation and the longest fire resistance. The ceramization process creates an extremely effective barrier, maximizing the protection of internal pipes and cables. The sleeve is extremely rigid, virtually inflexible, and the heaviest and most expensive type, designed for static installations in the most extreme thermal disaster scenarios, such as fireproof partitions between modules within battery packs, emergency wiring protection within nuclear power plant containment structures, and any life safety system requiring the maximum time window for evacuation.

[0049] In another embodiment of this utility model, such as Figure 1 As shown, the thickness of the carbon black silicone layer 30 ranges from 0.3mm to 1.0mm, wherein the thickness of the carbon black silicone layer 30 can be:

[0050] The 0.3mm ultra-thin protective layer maximizes the overall flexibility of the sleeve while ensuring basic wear resistance and weather resistance. It has minimal impact on the performance of the intermediate heat insulation layer and has the lowest cost. However, its ability to resist scratches from sharp objects and continuous wear is limited. It is suitable for indoor or sealed environments where the main concern is environmental aging (such as ultraviolet rays and ozone) and the risk of mechanical wear is extremely low. For example, it is used for the organization and protection of wire harnesses in server racks and the wrapping of static cables inside precision instruments.

[0051] With a thickness of 0.5mm, it provides excellent all-around protection, exhibiting significant wear resistance, tear resistance, and weather resistance, while maintaining satisfactory flexibility for easy installation and wiring. It is widely used in applications such as internal wiring harnesses and conduits of new energy vehicle battery packs, sheathing of movable cables for industrial robots, and wiring for outdoor communication equipment, where there are risks of normal friction and environmental aging.

[0052] With a thickness of 0.7mm, the wear resistance and mechanical strength are significantly enhanced, effectively resisting frequent friction, minor scratches, and stress tearing. The rigidity of the sleeve is increased, while its bending flexibility is reduced, making it suitable for working conditions with a clear risk of mechanical wear, such as pipeline protection on automobile chassis near moving parts or susceptible to stone impacts, cable sheathing on drag chains in automated production lines, and wire harness protection for structural components with relative movement in mining equipment.

[0053] With a thickness of 0.9mm, this ultra-wear-resistant design provides exceptional wear resistance and resistance to physical damage, resulting in outstanding durability. The hardened casing requires a large bending radius and is suitable for extremely harsh abrasion environments, such as hydraulic lines and external cables in construction machinery (e.g., excavators, cranes), component protection in dusty environments for agricultural machinery, and pipelines in material handling systems subject to continuous friction.

[0054] 1.0mm, the maximum protection level thickness, is the maximum physical protection that can be provided after balancing flexibility. Its resistance to abrasion, cut and tear is at its peak, but the sleeve is very rigid and has very poor flexibility. It is used to deal with extreme mechanical abuse, such as air brake lines on heavy trucks that come into contact with cargo, pipelines in port machinery that may be impacted or dragged, and cable sheaths for exploration equipment that need to cross rough rock surfaces.

[0055] In another embodiment of this utility model, such as Figure 1 As shown, a high-temperature resistant polymer film 40 is provided on the outer surface of the carbon black silicone layer 30. When exposed to open flame or extremely high-temperature sputtering, the high-temperature resistant polymer film 40 can withstand long-term working temperatures of up to 400°C and short-term high temperatures of up to 800°C, providing crucial buffer time for the internal carbon black silicone layer 30 and greatly delaying the transmission of thermal shock.

[0056] In another embodiment of this utility model, such as Figure 1 As shown, the thickness of the high-temperature resistant polymer film 40 ranges from 0.05 mm to 0.2 mm, wherein the thickness of the high-temperature resistant polymer film 40 can be:

[0057] At 0.05mm, it has minimal impact on the overall flexibility of the sleeve, adds almost no rigidity or weight, and has the lowest material cost. It provides basic electrical insulation, non-stick properties, and resistance to chemical solvent splashing, but its resistance to mechanical scratches and abrasion is relatively weak. It requires extremely high precision in the co-extrusion lamination process and is suitable for static installations, applications with no risk of mechanical friction but requiring protection against welding slag, chemical splashing, or excellent dielectric properties. Examples include internal insulation wrapping of precision motors and transformers, and corrosion protection for pipelines in laboratory instruments and equipment.

[0058] At 0.08mm, it achieves the best balance between flexibility and protection, significantly improving surface hardness, scratch resistance and wear resistance, while maintaining good flexibility for easy installation and wiring. It is the preferred thickness that takes into account overall performance and cost, and is the ideal thickness for the protection of liquid cooling pipes and high-voltage wiring harnesses in new energy vehicle battery packs. It is also widely used in environments with normal friction, such as industrial robot wiring harnesses and cable sheaths that require frequent slight bending.

[0059] With a thickness of 0.12mm, it boasts exceptional mechanical strength and surface durability, effectively resisting frequent friction and scratches for a longer service life. The rigidity of the sleeve begins to show a noticeable increase, requiring a larger bending radius, making it suitable for moderately harsh environments with a clear risk of mechanical wear, such as automotive chassis wiring harnesses, mobile equipment cable protection on automated production lines, and protection for outdoor cabinet terminal blocks.

[0060] With a thickness of 0.16mm, it offers excellent resistance to tearing, puncture, and continuous abrasion, and has an extremely tough surface. The sleeve exhibits significant rigidity but lower flexibility, resulting in higher cost. It is used in harsh mechanical environments, such as external cable protection for construction machinery and agricultural equipment, pipelines in mining equipment prone to collisions with rocks and gravel, and cables for heavy-duty port equipment.

[0061] At 0.20mm, it offers ultimate surface protection, peaking in abrasion resistance and resistance to physical damage, and excellent durability. However, the casing becomes extremely rigid and lacks flexibility, posing the greatest challenge to the co-extrusion process and resulting in the highest cost. It is used in situations requiring extreme mechanical abuse and strong chemical corrosion, such as gas hoses on heavy trucks that rub directly against cargo, pipeline protection in corrosive environments on oil drilling platforms, and wiring harnesses for specialized equipment requiring maximum maintenance intervals.

[0062] In another embodiment of this utility model, such as Figure 1As shown, a smooth polytetrafluoroethylene film layer 50 is provided on the inner wall of the silicone substrate layer 10 to reduce flow resistance and prevent deposition. The extremely smooth inner wall significantly reduces the resistance of fluid transport in the pipeline and effectively prevents impurities and precipitates in the coolant from depositing and scaling on the pipe wall, thus maintaining long-term pipeline unobstructed flow and heat exchange efficiency.

[0063] In another embodiment of this utility model, such as Figure 1 As shown, the thickness of the polytetrafluoroethylene (PTFE) film layer 50 ranges from 0.03 mm to 0.15 mm, wherein the thickness of the PTFE film layer 50 can be:

[0064] At 0.03mm, it offers minimal resistance to fluid flow and has a negligible impact on the overall thermal conductivity of the sleeve. It maximizes the preservation of the substrate's flexibility and has the lowest cost. However, it has the weakest physical strength, providing only basic anti-sticking and chemical protection. It is not resistant to the erosion of internal fluids or the wear of particles. It is suitable for applications requiring extremely high flow rates and thermal efficiency, where the medium is pure, free of particles, and non-corrosive liquids or gases. Examples include fluid pipelines for precision medical devices, high-purity chemical reagent delivery pipes, and lightweight pipelines for aerospace fuel systems.

[0065] At 0.05mm, it achieves the optimal balance between functionality and system impact. It provides significant and lasting anti-sticking, anti-scaling, and chemical corrosion resistance while maintaining excellent inner wall smoothness to reduce flow resistance. Its mechanical strength is sufficient to withstand long-term erosion by common fluids. As a versatile and efficient option, it is the ideal thickness for liquid cooling pipes in new energy vehicle battery packs. It is also widely used in the transportation of high-purity chemicals in semiconductor manufacturing, process pipelines in the food and pharmaceutical industries, and the protection of pressure measurement pipelines for industrial sensors.

[0066] With a thickness of 0.08mm, mechanical strength and wear resistance are significantly improved, effectively resisting long-term erosion and friction from tiny particles in the medium, providing a longer service life and more reliable protection. It begins to have a slight impact on the flexibility and thermal conductivity of the sleeve, making it suitable for working conditions where the medium contains slightly abrasive particles or where anti-scaling requirements are extremely strict, such as industrial cooling circulating water systems, slurry conveying pipelines in chemical production, and ink supply pipelines for printer printheads.

[0067] With a thickness of 0.12mm, it offers excellent impermeability and tear resistance. The film layer is extremely tough and effectively blocks highly corrosive media from eroding the internal silicone matrix. The increased rigidity and decreased flexibility of the inner wall of the sleeve make it suitable for conveying highly corrosive and highly permeable chemical media.

[0068] 0.15mm provides ultimate chemical protection and mechanical barrier, almost completely isolating the silicone matrix from the effects of any chemical media. It has excellent durability, but significantly increases pipe wall rigidity and thermal resistance, as well as fluid resistance and cost. It is used to deal with extreme chemical corrosion and abuse, such as laboratory concentrated acid and strong alkali waste liquid discharge pipes, chemical injection pipes on oil platforms, and special industrial pipelines that need to cope with a variety of unknown highly corrosive media mixtures.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. An extruded heat-insulating silicone sleeve, characterized in that: It includes a tubular silicone substrate layer, a ceramicized silicone rubber layer disposed on the outer surface of the silicone substrate layer, a carbon black silicone layer disposed on the outer surface of the ceramicized silicone rubber layer, and the silicone substrate layer undergoing platinum vulcanization treatment.

2. The extruded heat-insulating silicone sleeve according to claim 1, characterized in that: The silicone substrate layer, the ceramicized silicone rubber layer, and the carbon black silicone layer are all processed together by an extrusion process to form a sleeve.

3. The extruded heat-insulating silicone sleeve according to claim 1, characterized in that: The thickness of the silicone substrate layer ranges from 0.5mm to 2.0mm.

4. The extruded heat-insulating silicone sleeve according to claim 1, characterized in that: The thickness of the ceramicized silicone rubber layer ranges from 1.0 mm to 3.0 mm.

5. The extruded heat-insulating silicone sleeve according to claim 1, characterized in that: The thickness of the carbon black silicone layer ranges from 0.3 mm to 1.0 mm.

6. The extruded heat-insulating silicone sleeve according to claim 1, characterized in that: A high-temperature resistant polymer film is provided on the outer surface of the carbon black silicone layer.

7. The extruded heat-insulating silicone sleeve according to claim 6, characterized in that: The thickness of the high-temperature resistant polymer film ranges from 0.05 mm to 0.2 mm.

8. The extruded heat-insulating silicone sleeve according to claim 1, characterized in that: A smooth polytetrafluoroethylene film layer is provided on the inner wall of the silicone substrate layer.

9. The extruded heat-insulating silicone sleeve according to claim 8, characterized in that: The thickness of the polytetrafluoroethylene film layer ranges from 0.03 mm to 0.15 mm.

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