High-temperature-resistant and pressure-resistant optical cable

Abstract

The utility model relates to the field of optical cable discloses a kind of high-temperature-resistant pressure-resistant optical cable, including cable core, cable core outside from inside to outside is equipped with mica tape heat insulation layer, stainless steel hose and outer sheath;Mica tape heat insulation layer and stainless steel hose between being equipped with inner foam layer, the outer side of stainless steel hose is equipped with stainless steel braid, and stainless steel braid and stainless steel hose between being equipped with kevlar layer, the outer side of kevlar layer is equipped with outer foam layer;The cable core includes core body, the outer side of core body is equipped with inner sheath, the outer side of inner sheath is equipped with coating layer.The utility model improves the temperature range of optical cable, and improves the tensile resistance of optical cable, can resist the impact of instantaneous high temperature simultaneously, prevent the interference of external electromagnetic field to optical cable inner signal transmission, and practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of optical cables, specifically a high-temperature resistant and pressure-resistant optical cable. Background Technology

[0002] With the continuous development of fiber optic cable technology, fiber optic cables have been widely used in fields beyond communications, including military, power, engineering monitoring (sensing), petrochemical, and medical fields. Especially in some specialized fields, fiber optic cables are receiving increasing attention and favor due to their advantages such as large information transmission capacity and strong resistance to electromagnetic interference.

[0003] Utility model patent application number 2018220113538 discloses a high-temperature and pressure-resistant optical cable, comprising an outer sheath and a tightly packed fiber core. The tightly packed fiber core includes an optical communication unit, which is wrapped with mica tape. The tightly packed fiber core is housed within a stainless steel corrugated tube, and the stainless steel corrugated tube is covered by an outer sheath, which is a high-temperature resistant outer sheath. This utility model's PFA tightly packed optical fiber significantly enhances the high-temperature resistance of the optical fiber. Simultaneously, the tight-buffered fiber is covered with mica tape, which has fire-resistant, high-temperature resistant, and heat-insulating flame-retardant functions, further improving the high-temperature resistance of the tightly packed fiber core. The stainless steel corrugated tube allows the optical cable to withstand high temperatures while possessing excellent lateral pressure resistance and bending performance, capable of withstanding repeated bending. The outer sheath uses high-temperature resistant PEEK material, forming multi-layer thermal insulation, further enhancing the optical cable's high-temperature resistance. It can withstand temperatures up to 200℃, is suitable for long-term high-temperature conditions, and is suitable for working environments from -50℃ to 200℃, making it suitable for signal connection lines of testing instruments in high-temperature environments.

[0004] However, in practical applications, the optical cable has poor tensile and compressive strength, is prone to breakage causing signal loss, and is susceptible to external electromagnetic interference, so improvements are needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a high-temperature resistant and pressure-resistant optical cable.

[0006] To solve the above problems, the technical solution of this utility model is: a high temperature and pressure resistant optical cable, including a cable core, wherein the cable core is provided with a mica tape heat insulation layer, a stainless steel flexible tube and an outer sheath from the inside to the outside;

[0007] An inner foaming layer is provided between the mica tape insulation layer and the stainless steel hose. A stainless steel braided mesh is provided on the outside of the stainless steel hose, and a Kevlar layer is provided between the stainless steel braided mesh and the stainless steel hose. An outer foaming layer is provided on the outside of the Kevlar layer.

[0008] The cable core includes a core body, an inner sheath is provided on the outside of the core body, and a coating layer is provided on the outside of the inner sheath.

[0009] Furthermore, the inner sheath is a silicone resin layer, and the coating layer is a PI coating.

[0010] Furthermore, the cable core is filled with photosensitive resin inside the mica tape insulation layer.

[0011] Furthermore, the inner foam layer is formed by extruding a blend of polypropylene and a foaming agent onto the outside of the mica tape insulation layer, and the outer foam layer has the same design as the inner foam layer.

[0012] Furthermore, the stainless steel hose is located in the middle of the outer foam layer.

[0013] Furthermore, the outer sheath is a PEEK sheath.

[0014] The advantages of this invention compared with existing technologies are: this invention improves the temperature resistance range of optical cables, enhances their compressive and tensile strength, and can withstand the impact of instantaneous high temperatures, preventing external electromagnetic fields from interfering with signal transmission within the optical cable, making it highly practical. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention.

[0016] As shown in the figure: 1. Cable core; 1.1. Core body; 1.2. Inner sheath; 1.3. Coating layer; 2. Mica tape insulation layer; 3. Stainless steel flexible tube; 4. Outer sheath; 5. Inner foam layer; 6. Stainless steel braided mesh; 7. Kevlar layer; 8. Outer foam layer; 9. Photosensitive resin. Detailed Implementation

[0017] 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.

[0018] like Figure 1 As shown, a high-temperature and pressure-resistant optical cable includes a cable core 1. The cable core 1 is provided with a mica tape heat insulation layer 2, a stainless steel flexible tube 3 and an outer sheath 4 from the inside to the outside. The outer sheath 4 is a PEEK sheath.

[0019] The cable core 1 includes a core body 1.1, an inner sheath 1.2 on the outside of the core body 1.1, a coating layer 1.3 on the outside of the inner sheath 1.2, the inner sheath 1.2 being a silicone resin layer, and the coating layer 1.3 being a PI coating. The cable core 1 is filled with photosensitive resin 9 on the inside of the mica tape heat insulation layer 2.

[0020] An inner foam layer 5 is provided between the mica tape insulation layer 2 and the stainless steel hose 3. A stainless steel braided mesh 6 is provided on the outside of the stainless steel hose 3, and a Kevlar layer 7 is provided between the stainless steel braided mesh 6 and the stainless steel hose 3. An outer foam layer 8 is provided on the outside of the Kevlar layer 7. The inner foam layer 5 is formed by extruding a blend of polypropylene and a foaming agent on the outside of the mica tape insulation layer 2. The outer foam layer 8 has the same design as the inner foam layer. The stainless steel hose 3 is located in the middle of the outer foam layer 8.

[0021] In practical applications, the PI coating enhances the high-temperature resistance of the cable core 1, while the mica tape winding forms the first thermal insulation barrier. Combined with the high-temperature resistant layer of photosensitive resin 9, it can withstand the impact of instantaneous high temperatures of 390°C. The stainless steel flexible tube 3 provides radial compressive protection while maintaining axial flexibility. The two foam layers enhance the compressive strength of the optical cable and also provide thermal insulation. The stainless steel braided mesh 6 effectively resists external tensile forces, preventing the optical cable from breaking due to stretching during installation or use. It also forms an effective shielding layer, preventing external electromagnetic fields from interfering with signal transmission within the optical cable. The stainless steel braided mesh 6 also effectively shields against radio frequency interference, ensuring the stability and reliability of the optical cable transmission. The Kevlar layer 7 increases the tensile strength of the optical cable to over 2000N and the compressive strength to 5000N / cm². 2 .

[0022] Testing revealed that the temperature resistance range of this new type of optical cable is extended to -60℃ to +260℃, and it can withstand the impact of instantaneous high temperature of 390℃. The short-term lateral pressure of the optical cable is 2000N / 100mm, and its compressive strength reaches 5000N / cm. 2 .

[0023] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] 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.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-temperature resistant and pressure-resistant optical cable, comprising a cable core (1), wherein the cable core (1) is provided with a mica tape heat insulation layer (2), a stainless steel flexible tube (3), and an outer sheath (4) from the inside to the outside, characterized in that: An inner foam layer (5) is provided between the mica tape insulation layer (2) and the stainless steel hose (3). A stainless steel braided mesh (6) is provided on the outside of the stainless steel hose (3), and a Kevlar layer (7) is provided between the stainless steel braided mesh (6) and the stainless steel hose (3). An outer foam layer (8) is provided on the outside of the Kevlar layer (7). The cable core (1) includes a core body (1.1), an inner sheath (1.2) is provided on the outside of the core body (1.1), and a coating layer (1.3) is provided on the outside of the inner sheath (1.2).

2. The high-temperature resistant and pressure-resistant optical cable according to claim 1, characterized in that: The inner sheath (1.2) is a silicone resin layer, and the coating layer (1.3) is a PI coating.

3. The high-temperature resistant and pressure-resistant optical cable according to claim 1, characterized in that: The cable core (1) is filled with photosensitive resin (9) inside the mica tape insulation layer (2) on the outside.

4. The high-temperature resistant and pressure-resistant optical cable according to claim 1, characterized in that: The inner foam layer (5) is formed by extruding a blend of polypropylene and foaming agent onto the outside of the mica tape insulation layer (2), and the outer foam layer (8) has the same design as the inner foam layer.

5. The high-temperature resistant and pressure-resistant optical cable according to claim 1, characterized in that: The stainless steel hose (3) is located in the middle of the outer foam layer (8).

6. The high-temperature resistant and pressure-resistant optical cable according to claim 1, characterized in that: The outer sheath (4) is a PEEK sheath.

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