A deep-sea hybrid TMS umbilical and a method of manufacturing the same

Abstract

The application discloses a deep-sea mixed-armored TMS umbilical cable and a preparation method thereof. The cable comprises a cable core, an UHMWPE armored layer, an inner sheath, an aramid armored layer and a glass bead / TPE buoyancy sheath. The cable core comprises a drainage wire, a power supply wire, a power wire, an optical unit and water-blocking glue. Each cable unit is twisted and integrated, and the twisted gap is filled with water-blocking glue. The UHMWPE armored layer is coated on the outside of the cable core and serves as an inner layer load-bearing armored layer. The inner sheath is coated on the outside of the cable core. The aramid armored layer is coated on the outside of the UHMWPE armored layer. The glass bead / TPE buoyancy sheath serves as an outermost sheath and is coated on the outside of the aramid armored layer. The preparation process of the application adds a high-temperature moisture removal process to solve the problem of sheath blistering caused by aramid moisture absorption. The finished product has the advantages of light weight, repeated winding resistance, anti-creep performance and is suitable for signal and power transmission between a 6000-meter deep-sea mining TMS system and an ROV.

Description

Technical Field

[0001] This invention relates to the technical field of underwater umbilical cable equipment, and in particular to a deep-sea hybrid armored TMS umbilical cable and its preparation method. Background Technology

[0002] TMS, or Tether Management System, is the core underwater relay station for 6,000-meter-class deep-sea polymetallic nodules and cobalt-rich crust mining systems. It is located between the main umbilical cable of the mother ship and the mining ROV / collector, and is mainly used to solve three major engineering pain points in deep-sea mining: long cable tension, ship disturbance, and operating radius limitations.

[0003] The TMS relay system possesses core functions such as vibration isolation and decoupling, extending the mining operation radius, graded tension protection, and underwater photoelectric signal relay amplification. It isolates the mother ship from hull rise and fall and swaying disturbances caused by waves through the dynamic deployment and retraction of the neutral cable via rollers, preventing cable fatigue and breakage. Relying on the built-in 1000-2000m neutral cable, it increases the mining coverage of a single station by 3-5 times, reducing the frequency of mother ship relocation. It achieves load grading, with the main umbilical cable bearing the TMS's own weight and the buoyancy of the entire section of water, while the TMS umbilical cable only bears the short-distance towing load of the ROV, extending the overall service life of the umbilical cable system. The TMS also carries an optical amplification module to compensate for long-distance fiber optic signal attenuation, ensuring real-time transmission of data such as mining camera footage, equipment control, and slurry flow.

[0004] As an intermediate cable connecting the TMS and the mining ROV, the TMS umbilical cable operates under harsh conditions, requiring a water depth of over 6000 meters. It must be able to withstand repeated deployment and retrieval by the underwater winch mechanism, possess excellent small bending radius performance, and the cable body must achieve neutral / microgravity with a density close to that of seawater.

[0005] In existing technologies, to achieve zero buoyancy underwater, if a conventional foamed buoyancy structure is used, the structure will collapse under the high pressure environment of a 6000-meter deep sea, resulting in a smaller outer diameter, reduced buoyancy, and difficulties in winch cable deployment. Therefore, in deep-water environments, only glass microspheres can be used as buoyancy fillers. Glass microspheres have a density of approximately 0.60 g / cm³, and when blended with polymers, they are subject to enormous shear forces during production, making them prone to breakage and increasing the overall material production difficulty. Composite materials prepared using TPE as the base material still have a density in the range of 0.75-0.8 g / cm³. Simply relying on a buoyancy sheath to achieve neutral buoyancy would significantly increase the cable's outer diameter, contradicting the requirement for a small bending radius.

[0006] Traditional TMS umbilical cables commonly use aramid fiber as the load-bearing armor material. Aramid fiber has a high modulus and small deformation under stress, but a large amount of aramid fiber is required to meet the load-bearing requirements, resulting in a large cable weight. Therefore, there is an urgent need to develop a TMS umbilical cable that balances lightweight, small outer diameter, resistance to repeated bending, and adaptability to deep-sea high pressure. Ultra-high molecular weight polyethylene fiber (UHMWPE) has low density, high strength, and excellent abrasion resistance, making it suitable for repeated bending conditions; however, its creep resistance is relatively poor, and it melts and softens at processing temperatures reaching 130-150℃, resulting in a loss of strength, making it unsuitable as a standalone load-bearing armor layer for umbilical cables. This paper proposes combining the advantages of UHMWPE and aramid fiber for hybrid use to develop an underwater TMS cable that balances weight and creep performance, addressing the current industry pain points. Summary of the Invention

[0007] The main technical problem solved by this invention is to provide a deep-sea hybrid armored TMS umbilical cable, comprising: a cable core, an inner sheath, a UHMWPE armor layer, an aramid armor layer, and a glass microsphere / TPE buoyancy sheath;

[0008] The cable core includes a lead wire, a power wire, a power line, an optical unit, and a water-blocking adhesive. Each cable unit is twisted together, and the twisted gaps are filled with water-blocking adhesive.

[0009] The UHMWPE armor layer covers the outside of the inner sheath and serves as the inner load-bearing armor layer.

[0010] The aramid armor layer covers the outside of the UHMWPE armor layer, serving as the outer load-bearing armor layer;

[0011] The glass microsphere / TPE buoyancy sheath serves as the outermost sheath, covering the outside of the aramid armor layer.

[0012] In a preferred embodiment of the present invention, the UHMWPE armor layer is formed by twisting ultra-high molecular weight polyethylene fibers at a twist angle of 15°-20°, and after the armoring is completed, the armor structure is tightly wrapped and tied with a single strand of UHMWPE fiber.

[0013] In a preferred embodiment of the present invention, the aramid armor layer is formed by aramid fibers twisted at a 15°-20° angle, and the aramid fibers completely cover the inner sheath.

[0014] In a preferred embodiment of the present invention, the UHMWPE armor layer utilizes the low density, high specific strength, bending fatigue resistance, and wear resistance of UHMWPE to achieve cable weight reduction and bending resistance; the aramid armor layer utilizes the high strength and creep resistance of aramid to suppress long-term load creep elongation of UHMWPE.

[0015] In a preferred embodiment of the present invention, the glass microsphere / TPE buoyancy sheath is filled with hollow glass microspheres with TPE as the matrix, so as to achieve non-collapse under the high pressure environment of the deep sea at a depth of 6000 meters.

[0016] A method for preparing a deep-sea hybrid armored TMS umbilical cable includes the following steps:

[0017] S1. Cable core preparation: The lead wire, power wire, power line and optical unit are twisted together, and the twisting gaps are filled with water-blocking adhesive to prepare a complete cable core.

[0018] S2, Extruded Inner Sheath: An inner sheath is extruded onto the outside of the cable core;

[0019] S3, Inner UHMWPE Armor: An armoring machine is used to wrap ultra-high molecular weight polyethylene fibers at a twisting angle of 15°-20° around the outer sheath, controlling the tension of the armoring thread release; after the armoring is completed, a wrapping machine is used to tightly wrap and bind the armoring layer with single strands of UHMWPE fibers to fix the armoring structure.

[0020] S4. Outer Aramid Armor: Using an armoring machine, aramid fibers are twisted at an angle of 15°-20° and wrapped around the outside of the inner sheath. The tension of the yarn is controlled, and the aramid fibers are completely covered to form the outer aramid armor layer.

[0021] S5. Outer Sheath Extrusion Molding: A high-temperature heating jacket with a length of 1~2m and a temperature of 500-550℃ is set at the front end of the extruder head. The aramid armor layer passes through the high-temperature heating jacket to remove the moisture adsorbed by the aramid fibers. Then, glass microspheres / TPE buoyancy sheath is extruded. After extrusion, it is immediately cooled with water to prevent bubbling inside the sheath, and the finished mixed armor TMS umbilical cable is obtained.

[0022] In a preferred embodiment of the present invention, in step S3, the twisting angle of the ultra-high molecular weight polyethylene fiber is 19.2 degrees, and in step S4, the twisting angle of the aramid fiber is 19.2 degrees.

[0023] In a preferred embodiment of the present invention, the length of the high-temperature heating jacket is 1~2m and the temperature is set to 520℃.

[0024] The beneficial effects of this invention are:

[0025] 1. This invention adopts a layered mixed armor structure. The inner layer is made of UHMWPE armor layer, which utilizes its advantages of low density, high specific strength, resistance to repeated bending and high wear resistance to reduce the weight of the cable and improve the cable's resistance to bending fatigue. The outer layer is made of aramid armor layer, which leverages the advantages of aramid's high strength, creep resistance and long-term load dimensional stability. The two layers work together to balance load-bearing capacity, creep resistance and bending fatigue resistance.

[0026] 2. The mixed-armor composite load-bearing structure reduces the amount of overall fiber material used, effectively reducing the overall outer diameter and weight of the umbilical cable, solving the problem of large outer diameter of the sheath relying solely on buoyancy, and meeting the requirements for deployment and retraction under small bending radii.

[0027] 3. The outer layer adopts a glass microsphere / TPE composite buoyancy sheath. The sheath structure will not collapse under the high pressure environment of 6000 meters deep sea, and the dimensions are stable, achieving neutral buoyancy of the cable body, which is suitable for repeated deployment and retrieval operations of deep-sea mining TMS system.

[0028] 4. The manufacturing process includes a high-temperature heating jacket to remove moisture absorbed by the aramid fibers, followed by extrusion of a buoyancy sheath and water cooling for shaping. This effectively solves the problem of bubbling defects in the outer sheath caused by moisture absorption by the aramid fibers, ensuring the quality of the sheath molding and the sealing performance of the cable. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, wherein:

[0030] Figure 1 This is a schematic diagram of a preferred embodiment of a deep-sea hybrid armored TMS umbilical cable of the present invention. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1:

[0033] Please see Figure 1 A deep-sea hybrid-armored TMS umbilical cable includes 1 a guide wire, 2 a power wire, 3 a UHMWPE armor layer, 4 a glass microsphere / TPE sheath, 5 an optical unit, 6 a power wire, 7 an inner sheath, and 8 an aramid armor layer. The cable core is made of the guide wire, power wire, power wire, and optical unit twisted together, with water-blocking adhesive filling the twisted gaps. The cable core is covered from the inside out with the inner sheath, UHMWPE armor layer, aramid armor layer, and glass microsphere / TPE buoyancy sheath. The hybrid armor structure makes the cable lighter, and the excellent bending and low friction properties of UHMWPE enhance the bending performance of the umbilical cable, achieving the purpose of weight reduction and outer diameter reduction.

[0034] Material and parameter configuration for each layer:

[0035] 1) Cable core: includes a guide wire, a power wire, a power line, and a core optical unit; the twisting pitch of all units is controlled to be 10-14 times the outer diameter of the twisting; the twisting gaps are all filled with water-swellable water-blocking adhesive to achieve longitudinal water blocking and prevent deep-sea seawater from seeping into the inside of the cable core.

[0036] 2) UHMWPE armor layer: High-strength ultra-high molecular weight polyethylene fiber is selected, with a single fiber linear density of 1600 dtex; the armor twisting angle is 19.2°. After the armor is completed, 1200 dtex single-strand UHMWPE fiber is tightly wrapped and tied to restrain the armor fiber and prevent the fiber from loosening or shifting during the winding process.

[0037] 3) Inner sheath: Made of modified TPU material by extrusion molding, with a thickness of 1.2mm; the inner sheath serves to isolate the inner UHMWPE armor layer from the outer aramid armor layer, reducing the reciprocating friction and wear between the two layers of fibers, and at the same time providing initial sealing protection.

[0038] 4) Aramid armor layer: Aramid fibers are selected to ensure the linear density of the monofilaments and the twisting angle is 19.2°; the aramid fibers completely cover the surface of the UHMWPE fibers without any exposed gaps.

[0039] 5) Glass microsphere / TPE buoyancy sheath: The matrix is ​​high-elastic TPE, filled with hollow glass microspheres, with a total sheath thickness of 4.5mm. The overall composite material density is controlled at 0.78g / cm. Combined with the overall cable structure, it achieves near-neutral buoyancy of the cable in seawater. The sheath does not collapse or show significant volume compression under 60MPa hydrostatic pressure (corresponding to a water depth of about 6000 meters).

[0040] A method for preparing a deep-sea hybrid armored TMS umbilical cable includes the following steps:

[0041] Step 1: Cable Core Preparation: According to the requirements of the deep-sea mining TMS system, select the corresponding specifications of the diversion line, power line, power line, and optical unit. Strand multiple cable units into a cable with a stranding pitch of 13 times the outer diameter of the cable. The stranding gaps are continuously filled with water-blocking adhesive. After cabling, the outer diameter and roundness of the cable core are inspected. The tolerance of the outer diameter of the cable core is controlled within ±0.3mm.

[0042] Step 2: Extrusion of inner sheath: TPU inner sheath is extruded on the outside of the cable core at an extrusion temperature range of 170-210℃, with a thickness of 1.2mm. After extrusion, it is cooled and shaped by water cooling, resulting in a smooth surface without pores.

[0043] Step 3: UHMWPE Inner Armoring: Using an armoring machine, the twisting angle of the ultra-high molecular weight polyethylene fibers is controlled at 19.2°; the tension of the wire feeding is uniformly set to 85N to ensure that the fibers tightly and evenly cover the cable core, without excessive tightness damaging the cable core or excessive looseness causing floating wires; after the armoring process, a wrapping machine is used to tightly wrap and bind 1200dtex single-strand UHMWPE fibers with a 50% overlap rate to fix the armor layer and prevent the fibers from loosening and shifting. After the armoring is completed, the cable body is visually inspected, and the armor layer is free of skipped or broken wires.

[0044] Step 4: Aramid Outer Armoring: The armoring machine is set with a stranding angle of 19.2° and a single strand aramid tension of 90N. The aramid fibers completely cover the outside of the UHMWPE, with no exposed substrate and no gaps, forming the outer aramid armor layer. After armoring, an inspection is conducted to ensure there are no broken fibers or fuzzing. Because aramid fibers are highly hygroscopic, a moisture-proof wrapping film is used to temporarily wrap the cable during subsequent cable transport to reduce environmental moisture absorption.

[0045] Step 5: Extruded Glass Microspheres / TPE Buoyancy Outer Sheath: A 1-meter-long high-temperature heating jacket is placed at the front end of the extruder head, with the temperature set to 520℃; the aramid armored cable core passes through the high-temperature heating jacket at a uniform speed, and the high-temperature heat radiation fully evaporates the ambient moisture adsorbed by the aramid fibers; then it enters the extruder head to extrude glass microspheres to fill the TPE buoyancy sheath; the extruder barrel temperature is 160-180℃; after extrusion, the cable body immediately enters the circulating water cooling tank for cooling and shaping to prevent air bubbles and bulging defects inside the sheath due to moisture; after winding, the finished deep-sea hybrid armored TMS umbilical cable is obtained.

[0046] Finished product performance test results

[0047] Sampling and testing of the TMS umbilical cable prepared in this embodiment:

[0048] 1) Applicable water depth: 6000m, 66MPa pressure immersion test, the buoyancy sheath showed no collapse or cracking;

[0049] 2) Bending performance: The minimum bending radius is 13 times the outer diameter of the cable. After completing 100,000 cycles of repeated winding and unwinding fatigue test, there are no broken wires in the armor layer and no cracks in the sheath.

[0050] 3) Buoyancy characteristics: The cable exhibits near-neutral buoyancy in seawater;

[0051] 4) Photoelectric transmission: The optical unit's optical loss and the DC resistance of the power conductor meet the control and data transmission requirements of deep-sea mining ROVs.

[0052] Example 2

[0053] This embodiment has the same basic structure as Embodiment 1, the difference being that the process parameter range is selected with boundary conditions, the UHMWPE armor stranding angle is 18.3°, the aramid armor stranding angle is 18.3°, and the high-temperature heating jacket temperature is set to 550°.

[0054] Preparation process steps: Step 1: Cable core preparation. The composition of the cable unit is consistent with that in Example 1. The cable pitch is 12 times the outer diameter of the cable. The stranding gap is filled with water-blocking adhesive to complete the cable core preparation.

[0055] Step 2: Extrusion of the inner sheath, modified TPV inner sheath thickness 1.2mm, extrusion temperature 170-210℃, water cooling for setting.

[0056] Step 3: UHMWPE inner armor, bidirectional armor of ultra-high molecular weight polyethylene fiber, twist angle 18.3°, and wire tension 80N; after the armor is completed, the armor layer is fixed by wrapping and binding with a single strand of UHMWPE fiber with an overlap rate of ≥30%.

[0057] Step 4: Aramid outer layer armor, armor angle 18.3°, unwinding tension 85N, to achieve complete encapsulation of the inner UHMWPE.

[0058] Step 5: Extruding buoyancy sleeve, the high temperature heating sleeve at 500℃ is installed 1~2m at the front end of the die head to remove moisture adsorbed by aramid; extruding glass microspheres / TPE buoyancy sleeve, water cooling and shaping are performed immediately after extrusion.

[0059] Finished product testing: The tensile load-bearing capacity of the cable body meets the design specifications; the repeated bending fatigue performance is qualified; the sheath has no blistering defects; however, compared with Example 1, the cable elongation is slightly larger under the same load, which is suitable for deep-sea mining TMS working conditions with a shorter operating radius and a relatively lower frequency of retrieval and deployment.

[0060] Example 3

[0061] This embodiment has the same basic structure as Embodiment 1, with the UHMWPE armor stranding angle set at 20° and the aramid armor stranding angle set at 20°; the high-temperature heating jacket temperature is set at 550°.

[0062] Preparation process steps: Step 1: Cable core preparation, the composition of the cable unit remains unchanged, the cable pitch is 8.5 times the pitch, and water-blocking adhesive is filled.

[0063] Step 2: Extrusion of inner sheath, inner sheath thickness 1.2mm, extrusion-water cooling and shaping.

[0064] Step 3: UHMWPE inner layer armoring, bidirectional armoring with ultra-high molecular weight polyethylene fiber, twisting angle 20°, and wire tension 90N; after armoring, wrap and bind with single strand UHMWPE fiber with 45% overlap.

[0065] Step 4: Aramid outer armor, bidirectional armor of aramid fibers, twist angle 20°, unwinding tension 95N, completely covering UHMWPE.

[0066] Step 5: Extruding buoyancy sleeve, the high-temperature heating sleeve at 550℃ is installed 1~2m from the front of the die head to remove moisture from the aramid; extruding glass microspheres / TPE buoyancy sleeve, water cooling and shaping after extrusion.

[0067] Finished product test results: The cable has better radial structural stability and improved resistance to lateral pressure; however, the armor angle is increased, resulting in better bending performance; suitable for repeated winding and unwinding conditions of TMS system winches.

[0068] Comparative Example 1 (Traditional all-aramid armored TMS umbilical cable)

[0069] The traditional all-aramid single-layer armored structure is adopted. The internal cable unit of the cable core is exactly the same as that in Example 1. The load-bearing layer is entirely armored with aramid fibers, and the outer layer is also made of glass microspheres / TPE buoyancy sheath. Test comparison: Under the same tensile load conditions, the outer diameter of the cable increases by 12%, and the weight per unit length increases by about 21%. After repeated bending fatigue 30,000 times, the aramid armor layer shows powdering and local fiber breakage. The bending fatigue performance is significantly worse than that of Examples 1-3 of the present invention.

[0070] Comparative Example 2 (Pure UHMWPE Armored TMS Umbilical Cable)

[0071] The load-bearing layer is entirely armored with UHMWPE fiber, without an outer aramid armor layer. The remaining cable core and sheath structures are consistent with those in Example 1. During the extrusion of the outer sheath, the outer fibers melt due to heat, lose strength, and cause some of the fiber's function to disappear.

[0072] The above embodiments 1-3 are preferred and boundary process implementation examples of the present invention. The comparative examples are used to intuitively demonstrate the performance advantages brought by the hybrid armor structure of the present invention. Those skilled in the art can make adaptive adjustments to the number of cable cores, fiber specifications, sheath thickness, and armor tension under the technical concept of the present invention; these adjustments all fall within the protection scope of the present invention.

[0073] This invention offers the following advantages: It employs a layered hybrid armor structure. The inner layer uses UHMWPE armor, leveraging its low density, high specific strength, resistance to repeated bending, and high abrasion resistance to reduce cable weight and improve its resistance to bending fatigue. The outer layer uses aramid armor, utilizing aramid's high strength, creep resistance, and long-term load-bearing dimensional stability to compensate for the high creep rate of UHMWPE fibers. The two layers work synergistically to balance load-bearing capacity, creep resistance, and bending fatigue resistance. The outer layer uses a glass microsphere / TPE composite buoyancy sheath, ensuring the sheath structure will not collapse under the high pressure of a 6000-meter deep-sea environment, achieving neutral buoyancy for the cable. This is suitable for repeated deployment and retrieval operations in deep-sea mining TMS systems. The manufacturing process includes a high-temperature heating jacket to remove moisture absorbed by the aramid, followed by extrusion of the buoyancy sheath and water cooling for shaping. This effectively solves the blistering defect in the outer sheath caused by aramid moisture absorption, ensuring the sheath molding quality and cable sealing performance.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A deep-sea hybrid-armored TMS umbilical cable, characterized in that, include: Cable core, UHMWPE armor layer, inner sheath, aramid armor layer, and glass microsphere / TPE buoyancy sheath; The cable core includes a lead wire, a power wire, a power line, an optical unit, and a water-blocking adhesive. Each cable unit is twisted together, and the twisted gaps are filled with water-blocking adhesive. The UHMWPE armor layer covers the outside of the inner sheath and serves as the inner load-bearing armor layer; the inner sheath covers the outside of the cable core. The aramid armor layer covers the outside of the UHMWPE armor layer, serving as the outer load-bearing armor layer; The glass microsphere / TPE buoyancy sheath serves as the outermost sheath, covering the outside of the aramid armor layer.

2. The deep-sea hybrid armored TMS umbilical cable according to claim 1, characterized in that, The UHMWPE armor layer is formed by twisting ultra-high molecular weight polyethylene fibers at a twist angle of 15°-20°. After the armoring is completed, the armor structure is tightly wrapped and tied with a single strand of UHMWPE fiber.

3. A deep-sea hybrid armored TMS umbilical cable according to claim 2, characterized in that, The aramid armor layer is formed by aramid fibers twisted at a 15°-20° angle, and the aramid fibers completely cover the UHMWPE armor layer.

4. A deep-sea hybrid armored TMS umbilical cable according to claim 3, characterized in that, The UHMWPE armor layer utilizes the low density, high specific strength, bending fatigue resistance, and wear resistance of UHMWPE to achieve cable weight reduction and bending resistance; the aramid armor layer utilizes the high strength and creep resistance of aramid to suppress long-term load creep elongation of UHMWPE.

5. A deep-sea hybrid armored TMS umbilical cable according to claim 1, characterized in that, The glass microsphere / TPE buoyancy sheath uses TPE as a matrix and is filled with hollow glass microspheres to prevent collapse under the high pressure environment of the deep sea at a depth of 6000 meters.

6. A method for preparing a deep-sea hybrid armored TMS umbilical cable as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Cable core preparation: The lead wire, power wire, power line and optical unit are twisted together, and the twisting gaps are filled with water-blocking adhesive to prepare a complete cable core. S2, Extruded Inner Sheath: An inner sheath is extruded onto the outside of the cable core; S3, Inner UHMWPE Armor: An armoring machine is used to wrap ultra-high molecular weight polyethylene fibers around the cable core at a twisting angle of 15°-20°, controlling the tension of the armor release; after the armoring is completed, a wrapping machine is used to tightly wrap and bind the armor layer with single strands of UHMWPE fibers to fix the armor structure. S4. Outer Aramid Armor: Using an armoring machine, aramid fibers are twisted at an angle of 15°-20° and wrapped around the outside of the inner sheath. The tension of the yarn is controlled, and the aramid fibers are completely covered to form the outer aramid armor layer. S5. Outer Sheath Extrusion Molding: A high-temperature heating jacket with a length of 1~2m and a temperature of 500-550℃ is set at the front end of the extruder head. The aramid armor layer passes through the high-temperature heating jacket to remove the moisture adsorbed by the aramid fibers. Then, glass microspheres / TPE buoyancy sheath is extruded. After extrusion, it is immediately cooled with water to prevent bubbling inside the sheath, and the finished mixed armor TMS umbilical cable is obtained.

7. The method for preparing the deep-sea hybrid armored TMS umbilical cable according to claim 6, characterized in that, In step S3, the twisting angle of the ultra-high molecular weight polyethylene fiber is 19.2 degrees, and in step S4, the twisting angle of the aramid fiber is 19.2 degrees.

8. The method for preparing the deep-sea hybrid armored TMS umbilical cable according to claim 6, characterized in that, In step S5, the length of the high-temperature heating jacket is 1~2m, and the temperature is set to 520℃.

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