Preparation process and preparation system of photoelectric composite gravity ribbon towing cable

Abstract

The invention discloses a preparation process and a preparation system of a photoelectric composite gravity ribbon towing cable. The photoelectric composite gravity ribbon towing cable sequentially comprises a central framework, a twisted pair layer, an aramid fiber braid layer A, an inner sheath, an aramid fiber armor layer, an aramid fiber braid layer B and an outer sheath from inside to outside. Nine pairs of twisted-pair power units are uniformly distributed around the central cable core to form a twisted-pair layer, and the twisted-pair pitch is 235 mm; the lead wires are filled in the twisted-pair power units and in the gaps between the two adjacent twisted-pair power units, so that the lead wires are uniformly arranged. The high-density flexible lead wire is introduced as a filling material, so that the density and roundness of the towing cable are optimized; the problem of optical fiber additional attenuation in a dynamic environment is solved through an optical fiber excess length accurate control technology; the aramid fiber bearing layer with reverse torque balance design is adopted, so that high breaking force and anti-fatigue performance are provided; optimized balance among high strength, small outer diameter, high density and photoelectric property stability is realized through the layout of the skeleton type central cable core.

Description

Technical Field

[0001] The invention belongs to the field of marine engineering and communication technology, and in particular relates to a preparation process and a preparation system of a photoelectric composite gravity streamer tow cable. Background Art

[0002] Optical-electric composite streamer is a composite cable that integrates optical fiber communication and power transmission functions. It is widely used in fields such as ocean exploration, seabed monitoring, deep-sea resource exploration, and national defense communications. Its core functions include data transmission, energy supply, and bearing complex mechanical loads. However, modern deep-sea operations have placed higher requirements on the performance of streamers, requiring them to maintain structural stability and performance reliability for a long time in complex environments.

[0003] Existing technology and its shortcomings: 1) Conflict between high-strength and high-density design: In order to meet the requirements of high tension, existing optoelectronic composite tow cables often increase the thickness of the sheath or use steel wire armor to enhance the mechanical properties. However, this design often leads to an increase in the outer diameter of the tow cable and insufficient density, which affects the stability of deployment in deep-sea environments. An excessively large outer diameter of the tow cable will significantly increase the resistance of underwater laying and reduce the efficiency of the winch. Although the use of lightweight materials can reduce weight, insufficient density will lead to floating problems during deployment and increase the risk of tow cable instability.

[0004] 2) Fiber transmission performance is affected by dynamic environment: The fiber signal of the optoelectronic composite cable is susceptible to additional attenuation during dynamic stretching, temperature changes, and repeated retraction and extension. Under long-term stretching, the fiber may produce microbend loss and additional attenuation due to improper excess length design, which directly affects the communication quality. The existing technology fails to effectively control the fiber excess length ratio, and the dynamic performance is insufficient; the problem of additional fiber attenuation in a dynamic environment.

[0005] 3) Insufficient balance in mechanical design: In order to enhance the tensile strength of the tow cable, some designs use multi-layer steel wire armor. Although this improves the tensile strength, the steel wire is relatively rigid and easily squeezes the optical fiber and power unit, affecting the overall structural stability. High modulus synthetic fibers have advantages between tensile strength and flexibility, but how to achieve mechanical balance with other components of the tow cable is still a design problem.

[0006] 4) Lack of density-optimized materials: Traditional tow cables are usually filled with lightweight plastic or rubber, which has a low density and is difficult to meet the requirements of high-density design. The introduction of high-density flexible materials can help improve density and mechanical stability, but their dynamic performance matching and corrosion protection capabilities still need further research. Summary of the invention

[0007] The purpose of the present invention is to provide a preparation process and a preparation system of an optoelectronic composite gravity streamer towline. The present invention optimizes the density and roundness of the towline by introducing high-density flexible lead wire as a filling material; solves the problem of additional optical fiber attenuation in a dynamic environment through precise control technology of optical fiber excess length; adopts an aramid fiber bearing layer with a reverse torque balance design to provide high breaking force and anti-fatigue performance; and achieves an optimized balance between high strength, small outer diameter, high density and optoelectronic performance stability through a skeleton-type central cable core layout.

[0008] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a preparation process of a photoelectric composite gravity streamer cable, wherein the photoelectric composite gravity streamer cable comprises, from inside to outside, a central skeleton, a twisted pair layer, an aramid braided layer A, an inner sheath, an aramid armor layer, an aramid braided layer B and an outer sheath: The preparation process of the photoelectric composite gravity streamer cable comprises: Step 1: Evenly twist four power units and two optical fiber units at a pitch of 110 mm, fill the gaps between the center and the power units with lead wire to form a central skeleton; use flexible watertight glue to fill the gaps in the central skeleton; Step 2: Evenly distribute 9 pairs of twisted-pair power units around the central cable core to form a twisted-pair layer, with a twisted-pair pitch of 235 mm; fill lead wires inside the twisted-pair power units and in the gaps between two adjacent twisted-pair power units to ensure that the lead wires are evenly arranged; Step 3: Use 24 twisted aramid yarns to braid the cable core at a pitch of 100 mm on the outside of the twisted pair layer to form an aramid braided layer A, and the central skeleton, the twisted pair layer and the aramid braided layer A form a middle-layer cable core; Step 4: Cover the middle cable core with an inner sheath by TPU extrusion process, the inner sheath wall thickness is 1.5±0.1 mm, and after extrusion, cool it in a water cooling tank at 20℃-30℃; Step 5, winding an aramid armor layer on the outside of the inner sheath, wherein the aramid armor layer adopts a four-layer winding structure; Step 6: Use 24 twisted aramid yarns to braid the cable core at a pitch of 150 mm on the outside of the aramid armor layer to form an aramid braided layer B; Step 7: Extrude an outer sheath on the outside of the aramid braided layer B through a TPU extrusion process. The wall thickness of the outer sheath is 2.1±0.1 mm. After extrusion, it is cooled in a water cooling tank at 20°C-30°C.

[0009] Furthermore, the power unit uses annealed tinned copper wire as raw material and is coated with fluoroplastic through an insulation extrusion process; the extrusion equipment heats the fluoroplastic to a molten state, extrudes it through a die head and coats it on the surface of the conductor, and the extrusion wall thickness is controlled within the range of 0.425 mm±0.025 mm.

[0010] Furthermore, the optical fiber unit is composed of two 6-core multi-mode spiral steel tube optical fibers with an outer diameter of 2.7±0.1 mm, and the optical fiber excess length is precisely controlled at 3.772‰.

[0011] Furthermore, the twisted pair power unit is composed of two tinned copper conductors and two lead wires twisted together at a pitch of 75 mm.

[0012] Furthermore, the lead wire adopts high-density flexible lead with a purity of 99.99%, and a layer of fluoroplastic is extruded on the surface through a coating process to form the lead wire; the coated lead wire is cooled in a cooling tank at 20°C±5°C in turn.

[0013] Furthermore, the first and fourth layers of the aramid armor layer are wound in the same direction, with winding pitches of 450 mm and 525 mm respectively; the second and third layers are wound in the opposite direction to the first and fourth layers, with winding pitches of 475 mm and 500 mm respectively.

[0014] A photoelectric composite gravity streamer cable preparation system, comprising: A cabling machine A for forming a central skeleton; a cabling machine B for forming a twisted pair power unit; a cabling machine C for assembling the central skeleton and the twisted pair power unit; a braiding machine A for braiding an aramid braided layer A by twisting aramid yarn on the outside of the twisted pair layer; an extruder A for forming an inner sheath on the outside of the aramid braided layer A; an aramid stranding machine for braiding an aramid armored layer by twisting aramid yarn on the outside of the inner sheath; a braiding machine B for forming an aramid braided layer B on the outside of the aramid armored layer; and an extruder B for forming an outer sheath on the outside of the aramid braided layer B; and also includes a winder A for winding up the central skeleton led out from the cabling machine A, a winder C for winding up the cable led out from the cabling machine C, a winder B for winding up the optoelectronic composite gravity streamer towline led out from the extruder B and cooled and formed, and a curing chamber for curing the semi-finished towline products wound up on the winder A and the winder C respectively.

[0015] Furthermore, after the extruder A and the extruder B lead out the cables, a cooling water trough A and a cooling water trough B are respectively provided for cooling and drying the lead-out cables; the cooling water trough A and the cooling water trough B have the same structure and both include a rectangular trough body, and the rectangular trough body is divided into N cooling troughs and a drying trough by N partitions; any of the cooling troughs is filled with coolant, and a guide roller assembly is provided for controlling the cables to be led out from below the coolant liquid surface and above the coolant liquid surface; the guide roller assembly includes two first guide rollers below the coolant liquid surface, and two second guide rollers whose top ends are higher than the top ends of the partitions; two third guide rollers whose top ends are higher than the top ends of the second guide rollers are provided inside the drying trough; a temperature detection mechanism for detecting the temperature of the cables led out from the inside is provided at the end of any of the cooling troughs; a dewatering mechanism for dewatering the cables in an inclined state, and a drying mechanism for drying the cables in a horizontal state are provided above the drying trough.

[0016] Furthermore, the temperature detection mechanism includes a tube body fixed to the inner wall of the cooling tank by a connecting rod A, and an infrared temperature detection sensor facing the cable is arranged on an inner wall of the tube body; the water removal mechanism includes a ring body B fixed to the upper inner wall of the drying tank by a connecting rod, and the inner wall of the ring body B is provided with a wiper ring made of rubber or plastic material, and the wall thickness of the wiper ring gradually increases from the inside to the outside; the drying mechanism includes a rectangular tube, and the bottom side and top side of the rectangular tube are respectively provided with a plurality of air outlets and air inlets along the length direction thereof; the air inlet is connected to a hot air source.

[0017] Furthermore, any of the cooling troughs is also provided with a water replenishment component that can move up and down, and a plurality of drainage pipes are penetrated on the bottom side of any of the cooling troughs; the water replenishment component comprises a U-shaped frame A fixed to an inner wall of the cooling trough by a fixing rod, and the end of the U-shaped frame A is connected to a U-shaped frame B through two groups of elastic telescopic parts, and the U-shaped frame A, the elastic telescopic parts and the U-shaped frame B cooperate to form a rectangular frame, and the end of the U-shaped frame B is connected to a vertical water replenishment bell mouth, one end of the water replenishment bell mouth is connected to the water replenishment pipe, a mesh plate is provided at the port of the water replenishment bell mouth, and a float is provided in the water replenishment bell mouth; the bottom side of the cooling trough is connected to a movable A movable frame, wherein a plurality of plugging heads matching with the drain pipes are arranged on the bottom side of the movable frame, the plugging heads are in a cylindrical structure, and the cross-sectional radius of the plugging heads gradually decreases from top to bottom; and the bottom ends of the plurality of drain pipes are connected with a drain pipe through a hose, a valve is arranged on the drain pipe, and the drain pipe is connected with a cooling tower, and a water pump connected with the water supply pipe is arranged in the cooling tower; a support rod is also connected between the two opposite inner walls of the cooling trough, a control rod is hinged above the support rod, and one end of the control rod passes through the rectangular frame; a vertical rod is fixed on the upper surface of the movable frame, and the end of the vertical rod is connected with a rectangular frame for the other end of the control rod to pass through.

[0018] Furthermore, the winding machine C and the winding machine A have the same structure; both comprise a frame, a motor is fixed on the frame via a mounting seat, a circular side plate is mounted on the output shaft of the motor, one side of the circular side plate is connected to a main fixing rod, a secondary fixing rod is fixed to the circular side plate located at the main fixing rod, the ends of the main fixing rod and the secondary fixing rod are both connected to one side of a "cross"-shaped bracket; a supporting ring is connected to the peripheral side of the "cross"-shaped bracket, and a tubular sleeve is connected between the supporting ring and the circular side plate; When in use, an "I"-shaped winding drum is sleeved on the tubular sleeve, and at least two rectangular through holes arranged along the radial direction are opened on the circular side plate; a block penetrating the rectangular through hole is arranged on the side wall of one end of the winding drum; the four ends of the "cross"-shaped bracket are provided with baffles, and the baffles are extended and abut against the other end face of the winding drum; a pair of T-shaped columns are fixed to the four ends of the "cross"-shaped bracket, and rectangular openings for the T-shaped columns to pass through are arranged on the baffles; four groups of telescopic devices are arranged in the middle of the "cross"-shaped bracket, which respectively drive the four baffles to move along their length directions; a "cross"-shaped protrusion is arranged in the middle of the "cross"-shaped bracket, and a rectangular cavity is arranged in the protrusion. The telescopic device is installed in the rectangular cavity and is connected to a rectangular rod that moves along the axial direction of the rectangular cavity at its end. A T-slot is arranged at the end of the rectangular rod, and a T-shaped plug block that cooperates with the T-slot is arranged at one end of the baffle. The axial directions of the T-slot and the T-shaped plug block are the same as the axial direction of the main fixed rod; a pair of guide rails are arranged directly below the winding drum, and a pair of guide rails are cooperated with a movable seat that moves back and forth along its length direction, and two rows of pillars are arranged on the upper surface of the movable seat, and any row of the pillars is connected to a supporting drag rod for supporting the winding drum, and one end of the supporting drag rod is provided with two limiting rings with gap settings, and the two limiting rings form a gap for inserting the wire-blocking drum at one end of the winding drum.

[0019] Furthermore, the winder B comprises two support frames, rollers are arranged at both ends of the support frames, and a connecting beam and a U-shaped handrail frame are connected between the two support frames; a bearing seat is arranged at the end of the support frame, and a shaft is installed at the end of the bearing seat, and a rectangular sleeve is arranged at one end of the installation shaft located on the inner side of the support frame; at least two positioning rods are arranged on the inner bottom side of the rectangular sleeve; a positioning through hole for the positioning rod to pass through is arranged along the length direction of the installation shaft; it also includes an I-shaped winding frame, the winding frame comprises a winding shaft and wire retaining frames arranged at both ends of the winding shaft; rectangular slots for inserting the rectangular sleeve are respectively arranged at both ends of the winding shaft; and the end of the installation shaft is threadedly connected to the end cover, and the inner top side surface of the end cover is against the end of the positioning rod.

[0020] The present invention has the following beneficial effects: The present invention optimizes the density and roundness of the tow cable by introducing high-density flexible lead wire as a filling material; solves the problem of additional optical fiber attenuation in a dynamic environment through precise control technology of optical fiber excess length; adopts an aramid fiber bearing layer with a reverse torque balance design to provide high breaking force and anti-fatigue performance; and achieves an optimized balance between high strength, small outer diameter, high density and photoelectric performance stability through a skeleton-type central cable core layout.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the photoelectric composite gravity streamer tow cable of the present invention; Figure 2 This is a schematic diagram of the structure of the cooling water tank A of the present invention; Figure 3 It is a schematic diagram of the structure of the temperature detection mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the water removal mechanism of the present invention; Figure 5 It is a schematic diagram of the drying mechanism structure of the present invention; Figure 6 It is a schematic diagram of the cooling tank structure of the present invention; Figure 7 This is a schematic diagram of the water replenishment bell mouth structure of the present invention; Figure 8 for Figure 6 A partial enlarged view of the middle part; Fig. 9 It is a structural schematic diagram of the winding machine A of the present invention; Fig.10 for Fig. 9 A partial enlarged view of point B in the middle; Fig.11 It is a structural schematic diagram of the winding machine part A of the present invention; Fig.12 for Fig.11 A partial enlarged view of the middle part; Fig.13 It is a structural schematic diagram of the winding machine B of the present invention; Fig.14 It is a schematic diagram of the shaft structure of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] See also Figure 1 As shown, the present invention is a photoelectric composite gravity streamer cable; the photoelectric composite gravity streamer cable comprises a central skeleton 1, a twisted pair layer 2, an aramid braided layer A3, an inner sheath 4, an aramid armor layer 5, an aramid braided layer B6 and an outer sheath 7 from the inside to the outside: At the same time, the present invention also provides a preparation process of a photoelectric composite gravity streamer cable, which comprises: Step 1. Twist 4 power units and two optical fiber units evenly at a pitch of 110 mm, and fill the gap between the center and the power unit with lead wire to form a central skeleton 1; the cabling process is completed by cabling machine A, and cabling machine A is equipped with an automatic tension adjustment device to ensure that the power unit and the optical fiber unit are arranged closely and at a uniform pitch; to enhance the sealing, a flexible watertight filling glue is evenly injected into the gap of the cable core during twisting, and the filling uniformity is strictly controlled to avoid gaps; after filling, the cable core is tightened with a polyester tape to ensure its roundness and structural stability, and placed in a constant temperature box for curing at 80°C for 4 hours to ensure that the filling glue is completely cured; the power unit uses annealed tinned copper wire as the raw material, and is coated with fluoroplastics through an insulating extrusion process; the extrusion equipment heats the fluoroplastics to a molten state, and extrudes and coats them on the conductor surface through a die head, and the extrusion wall thickness is controlled within the range of 0.425 mm±0.025 mm; the optical fiber unit consists of two 6-core multi-mode spiral steel tube optical fibers with an outer diameter of 2.7±0.1 The excess length of optical fiber is precisely controlled at 3.772‰. By precisely controlling the excess length ratio of optical fiber and dynamically buffering the loose tube and filling materials, the influence of dynamic tension on the additional attenuation of optical fiber is reduced. The arrangement of power units and optical fiber units in the central skeleton 1 is optimized to improve the compactness of the cable core and reduce the risk of structural deformation.

[0027] Step 2: Evenly distribute 9 pairs of twisted pair power units around the central cable core and twist them at a pitch of 235 mm to form a twisted pair layer 2. During the twisting process, fill the gaps with flexible watertight glue again to ensure the roundness and sealing of the cable core structure. After the filling is completed, use the same curing process as the central cable core and cure at 80°C for 4 hours to ensure the mechanical strength and watertightness of the filling glue. Fill the inside of the twisted pair power unit and the gap between two adjacent twisted pair power units with lead wire to ensure that the lead wire is evenly arranged. The twisted pair power unit is twisted by two tinned copper conductors and two lead wires at a pitch of 75 mm. Step 3: Use 24 twisted aramid yarns to braid the cable core at a pitch of 100 mm on the outside of the twisted pair layer 2 to form an aramid braided layer A3, and the central skeleton 1, the twisted pair layer 2 and the aramid braided layer A3 form a middle-layer cable core; Step 4: Cover the middle cable core with an inner sheath 4 by TPU extrusion process, the inner sheath wall thickness is 1.5±0.1 mm, and after extrusion, it is cooled in a water cooling tank at 20°C-30°C; Step 5, winding an aramid armor layer 5 on the outside of the inner sheath, wherein the aramid armor layer 5 adopts a four-layer winding structure; the first layer and the fourth layer are wound in the same direction, the second layer and the third layer are wound in the same direction, and the winding directions of the first layer and the second layer are opposite, and the winding pitches of the first layer and the fourth layer are 450 mm and 525 mm respectively; the winding pitches of the second layer and the third layer are 475 mm and 500 mm respectively; the dynamic torque is effectively offset by the reverse torque balancing load-bearing layer, and the tensile strength and fatigue resistance are improved; and the tension is maintained at 5 N to ensure the uniformity and stability of the winding layer to meet the design requirements of high breaking tension; Step 6: Use 24 twisted aramid yarns to weave the cable core at a pitch of 150 mm on the outside of the aramid armor layer 5 to form an aramid braided layer B6, so as to further enhance the load-bearing performance of the armor layer and the overall stability of the cable core; Step 7: Extrude a layer of outer sheath 7 on the outside of the aramid braided layer B6 through TPU extrusion process. The wall thickness of the outer sheath 7 is 2.1±0.1 mm. After extrusion, it is cooled in a water cooling tank at 20°C-30°C.

[0028] In the present invention, the aramid braided layer A3, the aramid armor layer 5 and the aramid braided layer B6 are all made of Technora T2006680dtex / Z40 high modulus aramid with an average breaking strength of 1510N; the aramid fiber density is 1.39g / cm 3 , and a lubricant is coated on the high modulus aramid to prevent inter-fiber wear during winding.

[0029] In the above, the lead wire adopts high-density flexible lead with a purity of 99.99%, the density of the lead wire is 11.34 g / cm³, and a layer of fluoroplastic is extruded on the surface through a coating process to form the lead wire, wherein the coating thickness of the 1.3 mm lead wire is 0.1±0.025 mm, and the coating thickness of the 2.0 mm lead wire is 0.375±0.025 mm; the coated lead wire is cooled in a cooling tank at 20℃±5℃ in turn, and the coating thickness and uniformity are detected using an optical thickness gauge.

[0030] The present invention optimizes the overall density of the tow cable by filling high-density lead wire between the central skeleton 1 and the twisted pair layer 2, avoids the floating problem caused by traditional low-density materials, and avoids extrusion and damage to the photoelectric unit through the flexible characteristics of the lead wire; by introducing high-density flexible filling materials: by filling lead wire between the twisted pair unit and the cable core, the specific gravity and structural stability of the tow cable are optimized.

[0031] In the present invention, except for the central area formed by the four power units and the two optical fiber units which is filled with lead wires with a diameter of 2 mm, the remaining positions are filled with lead wires with a diameter of 1.3 mm.

[0032] In order to meet the requirements of high breaking force and fatigue resistance, the existing tow cables usually increase the thickness of the sheath or bearing layer, resulting in a loose cable core layout, an increase in the outer diameter, and even the risk of stress concentration leading to deformation of the cable core structure. The present invention adopts a skeleton-type central cable core structure and a lead wire filling design, which not only optimizes the compactness of the cable core, but also achieves a high breaking force of ≥24 tons and fatigue resistance performance of ≥18 tons after 1,800 bends through the aramid bearing layer with reverse torque balance.

[0033] The present invention extrude a layer of fluoroplastic FEP on the surface of the lead wire, which significantly improves the comprehensive performance of the lead wire in marine environments and complex dynamic working conditions. On the one hand, the FEP layer has excellent corrosion resistance and can form a dense protective layer in deep-sea high-salt and high-humidity environments, effectively resisting chemical erosion and extending the service life of the tow cable; on the other hand, the low friction coefficient of the FEP material makes the surface of the lead wire smooth, reducing friction with other materials during the tow cable cabling process, while enhancing the damping effect in a dynamic environment. In addition, the FEP coating also provides reliable mechanical protection for the lead wire, making it more adaptable under extrusion and bending conditions, and avoiding performance degradation or surface damage due to repeated dynamic loads.

[0034] It can be known that the size of the tinned copper wire provided by the present invention is 19×0.37 mm.

[0035] The photoelectric composite gravity streamer tow cable of the present invention has been verified by performance tests and experimental data, and has demonstrated excellent technical advantages and practical effects. The main performance and effects are described one by one in combination with the performance data and its test method.

[0036] a. Compatibility of high density and small outer diameter: Performance effect: High-density flexible lead wire filling material is used to meet the requirements of deep-sea environment for the stability of towline deployment. The overall density of the towline reaches 2.2±0.2 g / cm³, and the outer diameter is controlled within the range of 30±0.5 mm, taking into account the design requirements of high density and small outer diameter.

[0037] Density test: Cut the towline sample into small sections with a length of 10 cm, test the density using the immersion method, and calculate the average value.

[0038] Outer diameter test: Use a vernier caliper or micrometer to measure the outer diameter of the towline. Randomly measure the outer diameter dimensions of 10 locations on the towline and record the maximum, minimum and average values.

[0039] b. Long-term stability of optical fiber transmission performance: Performance effect: By precisely controlling the excess fiber length ratio of 3.772‰, under a pulling force of 6 tons, the additional attenuation of the optical fiber is 2.97 dB / km wavelength, and there is no increase in microbending loss.

[0040] Dynamic tensile test: The streamer sample is fixed to the tensioning device, and the tension is gradually increased until the optical fiber breaks; The additional attenuation of the optical fiber transmission signal is monitored in real time using an optical time domain reflectometer (OTDR) at a wavelength of 1300 nm. Record the change in optical fiber attenuation during dynamic stretching.

[0041] Fiber excess length verification: Cut the fiber unit, use a precision length measuring instrument to measure the length of the fiber and the sleeve respectively, and calculate the excess length ratio.

[0042] 3. Comprehensive improvement test of mechanical properties: Performance effect: By optimizing the reverse torque balance design of the aramid fiber bearing layer, the tensile test results of the streamer cable are as follows: The initial towline test breaking force is 26.61T After the bending test, the tow cable was slightly twisted and the breaking force was 19.84T.

[0043] The breaking tensile force of the tow cable reaches 26.61 tons, and the residual strength is maintained at 19.84 tons after 1,800 bending times, demonstrating excellent anti-fatigue performance and meeting the needs of high dynamic load environments in the deep sea.

[0044] Breaking tensile test: Cut a sufficient length of towline sample and use a fatigue testing machine to perform a breaking tensile test.

[0045] Flexure fatigue test: Arrange the tow cable sample on the fatigue testing machine and apply 2 tons of tension; Simulate the towline retraction and release in forward and reverse directions, winding 1800 times, and the driving wheel speed ≥ 0.6 m / s; The appearance, electrical characteristics, optical fiber transmission characteristics and breaking strength of the streamer were recorded before and after the test.

[0046] d. Structural stability under dynamic environment: Performance effect: The tow cable has no structural looseness or displacement during vibration and bending tests, and the optoelectronic performance remains stable.

[0047] Vibration test: Fix the streamer sample on a high-frequency vibration test bench, set the vibration frequency to 10 Hz-100 Hz, the amplitude to 1 mm-5 mm, and the test time to 2 hours. Observe the changes in the optical fiber signal.

[0048] Bending test: Use a bending fatigue tester to simulate the bending process at a fixed bending radius and frequency to monitor changes in optoelectronic performance and cable core compactness.

[0049] e. Functional optimization of FEP extruded on lead wire surface: Performance Effect: Lead wire coating exhibits excellent corrosion resistance, low friction and mechanical protection properties.

[0050] Corrosion resistance test: The FEP coated lead wire samples were immersed in a simulated seawater solution with a salt concentration of 3.5% for 120 hours to observe the coating integrity and the corrosion of the lead wire surface.

[0051] Mechanical protection test: The lead wire samples are subjected to bending tests on a bending test device, and the cracking or shedding of the coating is recorded, while the strength changes of the lead wire are detected.

[0052] Based on the requirements of the preparation of the optoelectronic composite gravity streamer tow cable of the present invention, a system for preparing the optoelectronic composite gravity streamer tow cable is provided as follows, the preparation system comprises a cabling machine A for forming a central skeleton 1, a cabling machine B for forming a twisted pair power unit, a cabling machine C for assembling the central skeleton 1 and the twisted pair power unit, a braiding machine A for braiding an aramid braided layer A3 with twisted aramid yarn on the outside of the twisted pair layer 2, an extruder A for forming an inner sheath 4 on the outside of the aramid braided layer A3, and an extruder A for forming an inner sheath 4 with twisted aramid yarn on the outside of the inner sheath 4. The invention also comprises an aramid stranding machine for weaving aramid yarn to form an aramid armor layer 5, a braiding machine B for forming an aramid braided layer B6 on the outside of the aramid armor layer 5, and an extruder B for forming an outer sheath 7 on the outside of the aramid braided layer B6; it also includes a winder A for winding up the central skeleton 1 led out from the cabling machine A, a winder C for winding up the cable led out from the cabling machine C, a winder B for winding up the optoelectronic composite gravity streamer towline led out from the extruder B and cooled and formed, and a curing chamber for curing the semi-finished towline wound on the winder A and the winder C respectively.

[0053] Based on the actual needs of preparing the optoelectronic composite gravity streamer cable, after the cables are drawn out from the extruder A and the extruder B, the obtained cables need to be cooled and dried, and cooling water tanks A and B are respectively provided at the discharge ends of the extruder A and the extruder B; Figure 2, and the cooling water tank A and the cooling water tank B have the same structure, both including a rectangular tank body 8, and the rectangular tank body 8 is divided into three cooling tanks 810 and a drying tank 811 by three partitions 81; any cooling tank 810 is filled with coolant, and a guide roller assembly is provided for controlling the cable to be introduced below the coolant liquid level and led out from above the coolant liquid level; the guide roller assembly includes two first guide rollers 82 below the coolant liquid level, and two second guide rollers 82 with top ends higher than the top ends of the partitions 81; two third guide rollers 82 with top ends higher than the top ends of the second guide rollers 82 are provided inside the drying tank 811; a device for detecting the temperature of the cable led out from the inside is provided at the end of any cooling tank 810 a temperature detecting mechanism 85; a dewatering mechanism 86 for dewatering the cables in an inclined state, and a drying mechanism 87 for drying the cables in a horizontal state are arranged above the drying groove 811; based on the above arrangement, when in use, the guide roller assembly is used to control the cables to be introduced below the coolant surface for cooling, and the cables are led out from above the coolant surface after the cooling is completed; in actual use, coolants of different temperatures and depths are injected into the three cooling grooves 810 according to needs, and after the cables are cooled by the three cooling grooves 810, the cables are controlled to be led out from the cooling groove 810 at the end, and after being led out, the dewatering mechanism 86 is used to dewater the cables in an inclined state, and then the drying mechanism 87 is used to dry the cables in a horizontal state.

[0054] In the above, the setting of the temperature detection mechanism 85 is convenient for detecting the cooling effect of the cooling groove 810 located at the front side of the corresponding temperature detection mechanism 85, so as to adjust the cooling capacity of the corresponding cooling groove 810 by controlling and adjusting the coolant level height and the coolant temperature of the cooling groove 810 according to needs; when the temperature detection mechanism 85 detects a temperature higher than the preset value, the coolant level height in the corresponding cooling groove 810 at the front side is increased or the coolant temperature is lowered.

[0055] Specifically, Figure 3 The temperature detection mechanism 85 provided includes a tube body 851 fixed to the inner wall of the cooling tank 810 through a connecting rod A850, and an infrared temperature detection sensor 852 facing the cable is arranged on an inner wall of the tube body 851.

[0056] Specifically, Figure 4 The dewatering mechanism 86 includes a ring body B860 fixed to the inner wall above the drying tank 811 through a connecting rod. The inner wall of the ring body B860 is provided with a wiper ring 861 made of rubber or plastic material, and the wall thickness of the wiper ring 861 gradually increases from the inside to the outside.

[0057] Specifically, Figure 5The drying mechanism 87 includes a rectangular tube 870, and the bottom side and the top side of the rectangular tube 870 are respectively provided with a plurality of air outlets 871 and air inlets 872 along the length direction thereof; the air inlet 872 is connected to a hot air source.

[0058] It is known that if Figure 6 In order to facilitate the adjustment of the liquid level and the coolant temperature in the cooling tank 810 during use, the present invention further provides a water replenishment component 89 that can move up and down in any cooling tank 810, and a plurality of drain pipes 812 are arranged through the bottom side of any cooling tank 810; and the bottom ends of the plurality of drain pipes 812 are connected to a drain pipe 884 through a hose, a valve 885 is arranged on the drain pipe 884, and the drain pipe 884 is connected to the cooling tower, and a water pump connected to the water replenishment pipe is arranged in the cooling tower; and then, after using, by opening the valve 885 and starting the water pump, it is convenient to control the discharge of the coolant in the cooling tank 810 and control the water pump to inject coolant with a lower temperature into the cooling tank 810 during use, thereby keeping the coolant temperature in the cooling tank 810 relatively stable.

[0059] When in use, in order to control the liquid level in the cooling tank 810 to change according to demand, such as Figure 6-8 The provided water replenishment assembly 89 includes a U-shaped frame A891 fixed on an inner wall of a cooling tank 810 through a fixing rod 890, and the end of the U-shaped frame A891 is connected to a U-shaped frame B893 through two sets of elastic telescopic members 892. The U-shaped frame A891, the elastic telescopic members 892 and the U-shaped frame B893 cooperate to form a rectangular frame, and the end of the U-shaped frame B893 is connected to a vertical water replenishment bell mouth 894, one end of the water replenishment bell mouth 894 is connected to the water replenishment pipe, a mesh plate 895 is arranged at the port of the water replenishment bell mouth 894, and a floating ball 896 is arranged in the water replenishment bell mouth 894; the cooling tank 810 The bottom side is connected to a movable frame 880 through a telescopic cylinder 88, and the bottom side of the movable frame 880 is provided with a plurality of sealing heads 881 that match the drain pipe 812 one by one. The sealing heads 881 are cylindrical in structure, and the cross-sectional radius of the sealing heads 881 gradually decreases from top to bottom; a support rod 813 is also connected between the two opposite inner walls of the cooling groove 810, and a control rod 814 is hinged above the support rod 813, and one end of the control rod 814 passes through the rectangular frame; a vertical rod 882 is fixed on the upper surface of the movable frame 880, and the end of the vertical rod 882 is connected to a rectangular frame 883 for the other end of the control rod 814 to pass through.

[0060] Based on the above arrangement, when it is necessary to control the liquid level in the cooling tank 810 to drop, the telescopic cylinder 88 is first controlled to extend to drive the movable frame 880 to move upward, and then the U-shaped frame B893 is driven downward by the control rod 814, thereby driving the water replenishment bell mouth 894 to move downward. At this time, the liquid level in the cooling tank 810 is adjusted.

[0061] like Figure 9-12 The winding machine C has the same structure as the winding machine A; both of them include a frame 90, on which a motor 902 is fixed through a mounting seat 901, a circular side plate 91 is mounted on the output shaft of the motor 902, one side of the circular side plate 91 is connected to a main fixing rod 910, and a secondary fixing rod 92 is fixed on the circular side plate 91 located at the main fixing rod 910, and the ends of the main fixing rod 910 and the secondary fixing rod 92 are both connected to one side of a "cross"-shaped bracket 93; a supporting ring 931 is connected to the peripheral side of the "cross"-shaped bracket 93, and the supporting ring 931 and the circular side plate 91 are connected to the main fixing rod 910. The tubular sleeve 930 is connected between the side plates 91; when in use, an "I"-shaped winding drum 96 is sleeved on the tubular sleeve 930, and at least two rectangular through holes 911 arranged along the radial direction are opened on the circular side plate 91; a stopper penetrating the rectangular through hole 911 is provided on the side wall at one end of the winding drum 96; a baffle 94 is provided at the four ends of the "cross"-shaped bracket 93, and the baffle 94 is extended and abuts against the other end surface of the winding drum 96; a pair of T-shaped columns 932 are fixed to the four ends of the "cross"-shaped bracket 93, and a baffle 94 is provided for the T-shaped The column 932 passes through a rectangular opening 941; the middle part of the "cross"-shaped bracket 93 is provided with four groups of telescopic devices that respectively drive the four baffles 94 to move along the length direction thereof; the middle part of the "cross"-shaped bracket 93 is provided with a "cross"-shaped protrusion 95, a rectangular cavity is provided in the protrusion 95, the telescopic device is installed in the rectangular cavity, and a rectangular rod 951 that moves along the axial direction of the rectangular cavity is connected to the end thereof, a T-shaped slot 942 is provided at the end of the rectangular rod 951, and a T-shaped plug block 942 that cooperates with the T-shaped slot 942 is provided at one end of the baffle 94, and the T-shaped plug The axial directions of the groove 942 and the T-shaped plug block 942 are the same as the axial direction of the main fixed rod 910; a pair of guide rails 97 are arranged directly below the winding drum 96, and a movable seat 971 that can move back and forth along its length direction is arranged on the pair of guide rails 97. Two rows of pillars 98 are arranged on the upper surface of the movable seat 971. Any row of pillars 98 is connected to a supporting drag rod 99 for supporting the winding drum 96. One end of the supporting drag rod 99 is provided with two gap-set limit rings 991, and the two limit rings 991 form a gap for inserting the wire drum at one end of the winding drum 96.

[0062] like Figure 13-14The winding machine B includes two support frames 101, rollers 103 are arranged at both ends of the support frames 101, and a connecting beam 102 and a U-shaped handrail frame 104 are connected between the two support frames 101; a bearing seat 105 is arranged at the end of the support frame 101, and a shaft 106 is installed at the end of the bearing seat 105, and a rectangular sleeve 107 is arranged at one end of the installation shaft 106 located on the inner side of the support frame 101; at least two positioning rods 1071 are arranged on the inner bottom side of the rectangular sleeve 107; the installation shaft 106 is provided with a positioning through hole 1061 for the positioning rod 1071 to pass through along its length direction; it also includes an I-shaped winding frame 10, the winding frame 10 includes a winding shaft and a wire stop frame arranged at both ends of the winding shaft; rectangular slots for inserting the rectangular sleeve 107 are respectively arranged at both ends of the winding shaft; and the end of the installation shaft 106 is threadedly connected to the end cover 108, and the inner top side surface of the end cover 108 is against the end of the positioning rod 1071.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A process for preparing a photoelectric composite gravity streamer cable, characterized in that: The photoelectric composite gravity streamer cable comprises, from the inside to the outside, a central skeleton (1), a twisted pair layer (2), an aramid braided layer A (3), an inner sheath (4), an aramid armor layer (5), an aramid braided layer B (6) and an outer sheath (7): The preparation process of the photoelectric composite gravity streamer cable comprises: Step 1: Evenly twist four power units and two optical fiber units at a pitch of 110 mm, fill the gaps between the center and the power units with lead wire to form a central skeleton (1); fill the gaps in the central skeleton (1) with a flexible watertight glue; Step 2: Evenly distribute 9 pairs of twisted-pair power units around the central cable core to form a twisted-pair layer (2), with a twisted-pair pitch of 235 mm; fill lead wires inside the twisted-pair power units and in the gaps between two adjacent twisted-pair power units to ensure that the lead wires are evenly arranged; Step 3: Using 24 twisted aramid yarns on the outside of the twisted pair layer (2) to braid the cable core at a pitch of 100 mm to form an aramid braided layer A (3); the central skeleton (1), the twisted pair layer (2) and the aramid braided layer A (3) form a middle-layer cable core; Step 4: Cover the middle cable core with an inner sheath (4) by TPU extrusion process, wherein the inner sheath has a wall thickness of 1.5±0.1 mm and is cooled in a water cooling tank at 20°C-30°C after extrusion; Step 5, winding an aramid armor layer (5) on the outside of the inner sheath, wherein the aramid armor layer (5) adopts a four-layer winding structure; Step 6: On the outside of the aramid armor layer (5), 24 twisted aramid yarns are used to braid the cable core at a pitch of 150 mm to form an aramid braided layer B (6); Step 7: Extrude an outer sheath (7) on the outer side of the aramid braided layer B (6) through a TPU extrusion process. The wall thickness of the outer sheath (7) is 2.1±0.1 mm. After extrusion, the outer sheath (7) is cooled in a water cooling tank at 20°C-30°C.

2. The process for preparing a photoelectric composite gravity streamer cable according to claim 1, characterized in that: The power unit uses annealed tinned copper wire as raw material and is coated with fluoroplastic through an insulation extrusion process; the extrusion equipment heats the fluoroplastic to a molten state, extrudes it through a die head and coats it on the surface of the conductor, and the extrusion wall thickness is controlled within the range of 0.425 mm±0.025 mm; the optical fiber unit is composed of two 6-core multi-mode spiral steel tube optical fibers with an outer diameter of 2.7±0.1 mm, and the optical fiber excess length is precisely controlled within 3.772‰.

3. The preparation process of a photoelectric composite gravity streamer cable according to claim 1, characterized in that: The twisted pair power unit is composed of two tinned copper conductors and two lead wires twisted together at a pitch of 75 mm.

4. The process for preparing a photoelectric composite gravity streamer cable according to claim 1, characterized in that: The lead wire is made of high-density flexible lead with a purity of 99.99%, and a layer of fluoroplastic is extruded on the surface through a coating process to form the lead wire; the coated lead wire is cooled in a cooling tank at 20°C±5°C in turn.

5. The process for preparing a photoelectric composite gravity streamer cable according to claim 1, characterized in that: The first and fourth layers of the aramid armor layer (5) are wound in the same direction, with winding pitches of 450 mm and 525 mm respectively; the second and third layers are wound in the opposite direction to the first and fourth layers, with winding pitches of 475 mm and 500 mm respectively.

6. A preparation system for a photoelectric composite gravity streamer cable, characterized in that: It is used to process the photoelectric composite gravity streamer tow cable prepared by the preparation process of the photoelectric composite gravity streamer tow cable as claimed in claim 1; The preparation system comprises: A cabling machine A for forming a central skeleton (1); A cabling machine B for forming a twisted pair power unit; A cabling machine C for assembling the central skeleton (1) and the twisted pair power unit; A braiding machine A for braiding an aramid braided layer A (3) using twisted aramid yarn on the outer side of a twisted pair layer (2); An extruder A for forming an inner sheath (4) on the outside of the aramid braided layer A (3); Aramid stranding machine for weaving an aramid armor layer (5) using twisted aramid yarn on the outer side of the inner sheath (4); A braiding machine B for forming an aramid braided layer B (6) on the outside of the aramid armor layer (5); and an extruder B for forming an outer sheath (7) on the outside of the aramid braided layer B (6); It also includes a reel A for reeling in the central skeleton (1) drawn out from the cabling machine A, a reel C for reeling in the cable drawn out from the cabling machine C, a reel B for reeling in the optoelectronic composite gravity streamer cable drawn out from the extruder B and cooled and formed, and a curing chamber for curing the semi-finished cable reeled in the reel A and the reel C respectively.

7. A preparation system according to claim 6, characterized in that: After the cables are led out from the extruders A and B, cooling water tanks A and B are respectively provided to cool and dry the led-out cables; The cooling water tank A and the cooling water tank B have the same structure, both comprising a rectangular tank body (8), wherein the rectangular tank body (8) is divided into N cooling tanks (810) and a drying tank (811) by N partitions (81); Any of the cooling grooves (810) is filled with cooling liquid, and is provided with a guide roller assembly for guiding a control cable below the cooling liquid surface and leading it out from above the cooling liquid surface; the guide roller assembly comprises two first guide rollers (82) below the cooling liquid surface, and two second guide rollers (82) with top ends higher than the top ends of the partitions (81); Two third guide rollers (82) are arranged inside the drying tank (811) and have top surfaces higher than top surfaces of the second guide rollers (82); A temperature detection mechanism (85) is provided at the end of any cooling groove (810) for detecting the temperature of a cable drawn out from the interior thereof; A dewatering mechanism (86) for dewatering cables in an inclined state and a drying mechanism (87) for drying cables in a horizontal state are arranged above the drying tank (811). The temperature detection mechanism (85) comprises a tube body (851) fixed to the inner wall of the cooling tank (810) via a connecting rod A (850), and an infrared temperature detection sensor (852) facing the cable is arranged on an inner wall of the tube body (851); The water removal mechanism (86) comprises a ring body B (860) fixed to the upper inner wall of the drying tank (811) via a connecting rod, the inner wall of the ring body B (860) is provided with a water scraper ring (861) made of rubber or plastic material, and the wall thickness of the water scraper ring (861) gradually increases from the inside to the outside; The drying mechanism (87) comprises a rectangular tube (870), and a plurality of air outlets (871) and air inlets (872) are respectively arranged on the bottom side and the top side of the rectangular tube (870) along the length direction thereof; the air inlets (872) are connected to a hot air source.

8. A preparation system according to claim 7, characterized in that: Any of the cooling grooves (810) is further provided with a water replenishment component (89) that can move up and down, and a plurality of drainage pipes (812) are provided through the bottom side surface of any of the cooling grooves (810); The water replenishment component (89) comprises a U-shaped frame A (891) fixed to an inner wall of a cooling tank (810) via a fixing rod (890); the end of the U-shaped frame A (891) is connected to a U-shaped frame B (893) via two groups of elastic telescopic parts (892); the U-shaped frame A (891), the elastic telescopic parts (892) and the U-shaped frame B (893) cooperate to form a rectangular frame; the end of the U-shaped frame B (893) is connected to a vertical water replenishment bell mouth (894); one end of the water replenishment bell mouth (894) is connected to a water replenishment pipe; a mesh plate (895) is provided at the end of the water replenishment bell mouth (894); and a floating ball (896) is provided in the water replenishment bell mouth (894); The bottom side of the cooling trough (810) is connected to a movable frame (880) via a telescopic cylinder (88); the bottom side of the movable frame (880) is provided with a plurality of plugging heads (881) matched one by one with the drainage pipes (812); the plugging heads (881) are cylindrical in structure, and the cross-sectional radius of the plugging heads (881) gradually decreases from top to bottom; the bottom ends of the plurality of drainage pipes (812) are connected to a drainage main pipe (884) via a hose; a valve (885) is provided on the drainage main pipe (884); the drainage main pipe (884) is connected to a cooling tower; a water pump connected to a water supply pipe is provided in the cooling tower; A support rod (813) is also connected between the two opposite inner walls of the cooling groove (810), and a control rod (814) is hinged on the top of the support rod (813), and one end of the control rod (814) passes through the rectangular frame; a vertical rod (882) is fixed on the upper surface of the movable frame (880), and the end of the vertical rod (882) is connected to a rectangular frame (883) for the other end of the control rod (814) to pass through.

9. A preparation system according to claim 7, characterized in that: The winding machine C has the same structure as the winding machine A; Each comprises a frame (90), a motor (902) being fixed to the frame (90) via a mounting seat (901), a circular side plate (91) being mounted on the output shaft of the motor (902), one side of the circular side plate (91) being connected to a main fixing rod (910), a secondary fixing rod (92) being fixed to the circular side plate (91) located at the main fixing rod (910), and ends of the main fixing rod (910) and the secondary fixing rod (92) being connected to one side of a "cross"-shaped bracket (93); A support ring (931) is connected to the circumferential side of the "cross"-shaped bracket (93), and a tubular sleeve (930) is connected between the support ring (931) and the circular side plate (91); When in use, an I-shaped wire winding drum (96) is sleeved on the tubular sleeve (930), and at least two rectangular through holes (911) arranged along a radial direction are opened on the circular side plate (91); a stopper penetrating the rectangular through hole (911) is arranged on a side wall at one end of the wire winding drum (96); The four ends of the "cross"-shaped bracket (93) are provided with baffles (94), and the baffles (94) are extended to abut against the other end surface of the winding drum (96); a pair of T-shaped columns (932) are fixed to the four ends of the "cross"-shaped bracket (93), and the baffles (94) are provided with rectangular openings (941) for the T-shaped columns (932) to pass through; The middle of the "cross"-shaped bracket (93) is provided with four groups of telescopic devices that respectively drive four baffles (94) to move along the length direction thereof; the middle of the "cross"-shaped bracket (93) is provided with a protrusion (95) in the shape of a "cross", a rectangular cavity is provided in the protrusion (95), the telescopic device is installed in the rectangular cavity, and a rectangular rod (951) that moves along the axial direction of the rectangular cavity is connected to the end thereof; a T-shaped slot (942) is provided at the end of the rectangular rod (951), and a T-shaped plug block (942) that cooperates with the T-shaped slot (942) is provided at one end of the baffle (94); the axial directions of the T-shaped slot (942) and the T-shaped plug block (942) are both the same as the axial direction of the main fixing rod (910); A pair of guide rails (97) are arranged directly below the wire winding drum (96); a movable seat (971) movable back and forth along the length direction thereof is arranged on the pair of guide rails (97); two rows of pillars (98) are arranged on the upper surface of the movable seat (971); a supporting rod (99) for supporting the wire winding drum (96) is connected to any row of the pillars (98); two limiting rings (991) arranged in a gap are arranged at one end of the supporting rod (99); the two limiting rings (991) form a gap for inserting a wire winding drum at one end of the wire winding drum (96).

10. A preparation system according to claim 7, characterized in that: The winding machine B comprises two support frames (101), rollers (103) are arranged at both ends of the support frames (101), and a connecting beam (102) and a U-shaped handrail frame (104) are connected between the two support frames (101); A bearing seat (105) is arranged at the end of the support frame (101); a shaft (106) is installed at the end of the bearing seat (105); a rectangular sleeve (107) is arranged at one end of the installation shaft (106) located inside the support frame (101); at least two positioning rods (1071) are arranged on the inner bottom side of the rectangular sleeve (107); and a positioning through hole (1061) for the positioning rod (1071) to pass through is arranged along the length direction of the installation shaft (106); The invention also comprises an I-shaped winding frame (10), the winding frame (10) comprising a winding shaft and wire retaining frames arranged at both ends of the winding shaft; rectangular slots for inserting a rectangular sleeve (107) are respectively arranged at both ends of the winding shaft; and the end of the mounting shaft (106) is threadedly connected to an end cover (108), and the inner top side surface of the end cover (108) abuts against the end of a positioning rod (1071).

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