Composite submarine cables and cable production equipment

The composite submarine cable design with a hollow conductor and advanced drying process addresses the weight and moisture issues of traditional cables, enhancing transportation and installation efficiency and sheath quality.

JP3254563UActive Publication Date: 2026-02-13HENGTONG SUBMARINE POWER CABLE CO LTD
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Patent Information

Application Number
JP2025600104U
Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
Priority Date
2023-10-19
Filing Date
2024-10-17
Publication Date
2026-02-13
Estimated Expiration
2034-10-17

AI Technical Summary

Technical Problem

Submarine cables with metal clad wires are heavy and cumbersome, leading to difficulties in transportation and installation, and moisture absorption during storage affects cable sheath quality.

Method used

A composite submarine cable design with a hollow conductor, semiconductive waterproof binding tape, conductor shield and insulating layers, and a lead alloy sheath, combined with a drying process using agitators and metal balls to remove moisture from cable particles.

Benefits of technology

The design reduces cable weight and improves transportation and installation ease while ensuring high-quality cable sheath performance by effectively removing moisture.

✦ Generated by Eureka AI based on patent content.

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Abstract

A composite submarine cable, a cable production method, and a cable production device, which relate to the field of submarine cables, includes a conductor (15), the conductor (15) is hollow, a semiconductive waterproof binding tape (16) is installed on the outside of the conductor (15), a conductor shield layer (17), an insulating layer (18), and an insulating shield layer (19) are sequentially applied on the outside of the semiconductive waterproof binding tape (16), a semiconductive waterproof tape (20) is wrapped on the outside of the insulating shield layer (19), and a lead alloy sheath (21) is applied on the outside of the semiconductive waterproof tape (20). The conductor (15) is covered with a carbon fiber tube (152), and a cable sheath (22) is placed on the outside of the lead alloy sheath (21). The conductor (15) includes a plurality of conductor units, and the plurality of conductor units are twisted together in the conductor (15). The conductor units include optical units (151). The optical units (151) are covered with a carbon fiber tube (152), and the carbon fiber tube (152) is covered with a stainless steel tube (153). By replacing the clad metal layer with a carbon fiber tube, the weight of the submarine cable is reduced, and transportation and installation of the submarine cable are facilitated.
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Description

[Technical Field]

[0001] The present invention relates to the technical field of submarine cables, and in particular to composite submarine cables, cable production methods and cable production devices. [Background technology]

[0002] A submarine cable is a cable wrapped in insulating material, laid on the ocean floor, and used to transmit electrical signals.

[0003] Submarine cables generally have a multi-layer structure, consisting of, from inside to outside, optical fiber, fiber paste, stainless steel tube, inner clad wire, waterproof adhesive, steel pipe, polyethylene insulation, outer clad wire, and cable outer layer. The clad is an important component of a submarine cable, while the outer clad wire and inner clad wire ensure the strength of the cable, provide mechanical protection and tensile stability, and can prevent external threats from fishing gear and anchors.

[0004] However, since both the outer clad wire and the inner clad wire are made of metal, and the submarine cable is very long and the overall weight of the submarine cable is relatively heavy, both transportation and installation of the submarine cable are very troublesome. The cable sheath is formed by wrapping the outer surface of the insulation layer with cable particles using an extruder. The cable particles generally contain several polar material components depending on their performance. During transportation and storage of the cable particles, these components cause the cable particles to easily absorb moisture and become damp. If the damp cable particles are directly used to form the cable sheath during cable extrusion, the cable sheath will have a poor appearance and poor performance. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the technical problem that the present invention aims to solve is to overcome any one of the above problems in the prior art. [Means for solving the problem]

[0006] In order to solve the above technical problems, the composite submarine cable of the present invention comprises a conductor, the interior of the conductor is hollow, a semiconductive waterproof binding tape is installed on the exterior of the conductor, a conductor shield layer, an insulating layer and an insulating shield layer are sequentially coated on the exterior of the semiconductive waterproof binding tape, the exterior of the insulating shield layer is wrapped with semiconductive waterproof tape, a lead alloy sheath is coated on the exterior of the semiconductive waterproof tape, and a cable sheath is coated on the exterior of the lead alloy sheath.

[0007] In one embodiment of the present invention, the conductor includes a plurality of conductor units, the plurality of conductor units are twisted together, the conductor units include an optical unit, a carbon fiber tube is sheathed on the outside of the optical unit, and a stainless steel tube is sheathed on the outside of the carbon fiber tube.

[0008] The cable production method is Step S1: extruding carbon fiber by a carbon fiber extruder to coat the optical unit, thereby producing a carbon fiber tube; Step S2: using a tube arc welding machine to cover and mold a stainless steel tape onto the carbon fiber tube, and then welding the stainless steel tape to cover the carbon fiber tube, thereby producing a stainless steel tube; Step S3: twisting the drawn filaments into a conductor using a frame-type twisting machine, and inserting a semiconductive waterproof tape every time one layer of the filaments is twisted, thereby ensuring the waterproof performance of the conductor; Step S4: wrapping the outermost layer of the waterproof conductor stranded wire with a semiconductive waterproof binding tape using a high-speed wrapping machine; Step S5: extruding a conductor shield layer, an insulating layer, and an insulating shield layer through a three-layer co-extrusion production line to cover the waterproof conductor, thereby producing an insulated core wire; Step S6: wrapping the insulating core wire with a semiconductive waterproof tape using a high-speed wrapping machine; Step S7: extruding a lead alloy sheath onto the outer surface of the semiconductive waterproof tape wrapped around the insulating core wire by a lead extruder; Step S8: coating the outer surface of the lead alloy sheath uniformly with the cable pitch; Step S9: removing moisture from the cable particles by a drying device; Step S10 includes putting the cable particles into an extruder and extruding the cable sheath out of the lead alloy sheath by the extruder.

[0009] In one embodiment of the present invention, the insulated core wire is made of cross-linked polyethylene or polypropylene. Before step S6, the insulated core wire is sent to a degassing chamber for degassing.

[0010] A cable production apparatus applicable to the cable production method described in any one of claims 3 and 4 is characterized in that the drying device includes a drying box, an inlet is installed at the top of the drying box, two agitators are installed inside the drying box, a base is fixedly connected below the drying box, a first empty cavity and a second empty cavity are provided in the base, the first empty cavity and the second empty cavity are arranged parallel to each other above and below, two belt pulleys are rotatably connected inside the first empty cavity, the two belt pulleys are transmission-connected to each other by a belt, a first motor is fixedly connected inside the second empty cavity, the output end of the first motor is fixedly connected to one of the belt pulleys by a shaft, and an intake pipe and an exhaust pipe are respectively connected to both sides of the drying box.

[0011] In one embodiment of the present invention, the agitator includes a stirring shaft, the stirring shaft is fixedly connected to a belt pulley, the stirring shaft is rotatably connected to a drying box and a base, a plurality of stirring blades are fixedly connected to the stirring shaft, the stirring blades are arranged crosswise one above the other, a metal ball is fixedly connected to each stirring blade, two No. 1 magnets are fixedly connected to the top of the drying box, the two No. 1 magnets are respectively located on both sides of the inlet, and a No. 2 magnet is fixedly connected in the first empty cavity, the No. 2 magnet corresponds to the No. 1 magnet, and the No. 2 magnet is located in the center of the two belt pulleys.

[0012] In one embodiment of the present invention, an inversion assembly is installed in the dry box, and the inversion assembly is used to invert the cable particles at the lower end of the dry box to a position at the upper end of the dry box; In one embodiment of the present invention, the inverting assembly includes an inverting plate, the inverting plate being slidably connected to the agitator shaft, a sliding groove being formed on the agitator shaft to be engaged with and slidably connected to the inverting plate, a spring being fixedly connected between the inverting plate and the sliding groove, a limiting plate being fixedly connected to a side wall of the drying box, both ends of the limiting plate having different horizontal heights, and the end of the inverting plate away from the agitator shaft being located at the upper end of the limiting plate, In one embodiment of the present invention, the stirring blade has an inverted T-shaped groove; In one embodiment of the present invention, a supply pipe is provided in the base, the supply pipe is connected to the dry box, and a baffle is fixedly connected to the stirring shaft, and the baffle contacts the upper surface of the bottom of the dry box. [Effects of the Invention]

[0013] Compared with the prior art, the above technical solution of the present invention has the following advantages: In order to remove moisture from the cable particles, the present invention starts the first motor, and the output end of the first motor drives and rotates the two agitators via the belt pulley and belt. The cable particles enter the drying box through the inlet and gather directly below the inlet. The agitators then move the cable particles gathered directly below the inlet to other positions in the drying box, dispersing the cable particles evenly within the drying box and increasing the contact area between the heated air and the cable particles. When the moisture in the cable particles is heated, it evaporates, and the water vapor is discharged from the drying box through the exhaust pipe. In this invention, to remove moisture from the cable particles more quickly, the stirring shaft drives the stirring blade to rotate the metal ball, and a magnetic field is formed between the first and second magnets, causing the metal ball to form a closed circuit through the electric wire. As the metal ball rotates, it cuts the magnetic flux lines and generates an induced current in the closed circuit. The induced current generates heat energy, and the metal ball's high thermal conductivity causes the temperature of the metal ball to rise quickly. As the metal ball rotates along the stirring shaft, it comes into contact with the cable particles, increasing the heat between the cable particles and accelerating the evaporation of moisture between the cable particles. At the same time, as the moisture evaporates, it absorbs heat into the drying box, allowing the metal ball to continuously supply heat energy to the drying box and speed up the removal of moisture from the cable particles. [Brief explanation of the drawings]

[0014] In order to make the present invention easier and clearer to understand, the present invention will be further described in detail below by way of specific embodiments of the present invention with reference to the drawings. [Figure 1] 1 is a schematic diagram of the structure of a submarine cable according to the present invention; [Figure 2] 1 is a schematic diagram of a main body structure according to an embodiment of the present invention; [Figure 3] 1 is a first cross-sectional view of a main body structure according to an embodiment of the present invention. [Figure 4] 1 is a structural diagram of a mixer according to an embodiment of the present invention; [Figure 5] 1 is a structural schematic diagram of a stirring blade according to an embodiment of the present invention; [Figure 6] FIG. 2 is a second cross-sectional view of the main body structure according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] In order to enable those skilled in the art to better understand and practice the present invention, the present invention will be further described below by means of specific embodiments with reference to the drawings, but the listed embodiments are not intended to limit the present invention.

[0016] Referring to FIG. 1, the composite submarine cable includes a conductor 15, the conductor 15 is hollow, a semiconductive waterproof binding tape 16 is installed on the outside of the conductor 15, a conductor shield layer 17, an insulating layer 18 and an insulating shield layer 19 are sequentially coated on the outside of the semiconductive waterproof binding tape 16, a semiconductive waterproof tape 20 is wrapped on the outside of the insulating shield layer 19, a lead alloy sheath 21 is coated on the outside of the semiconductive waterproof tape 20, and a cable sheath 22 is coated on the outside of the lead alloy sheath 21.

[0017] The conductor 15 includes a plurality of conductor units, which are twisted together to form the conductor 15, and the conductor unit includes an optical unit 151, a carbon fiber tube 152 is fitted around the outside of the optical unit 151, and a stainless steel tube 153 is fitted around the outside of the carbon fiber tube 152.

[0018] The cable production method is Step S1: extruding carbon fiber by a carbon fiber extruder to coat the optical unit 151, thereby producing a carbon fiber tube 152; Step S2: a stainless steel tape is covered and molded with a mold by a tube arc welding machine, and then welded to cover the carbon fiber tube 152, thereby producing a stainless steel tube 153; Step S3: twisting the drawn filaments into a conductor 15 using a frame-type twisting machine, and inserting a semiconductive waterproof tape every time one layer of the filaments is twisted, thereby ensuring the waterproof performance of the conductor 15; Step S4: wrapping the outermost layer of the waterproof conductor stranded wire with a semiconductive waterproof binding tape 16 using a high-speed wrapping machine; Step S5: extruding a conductor shield layer 17, an insulating layer 18, and an insulating shield layer 19 through a three-layer co-extrusion production line to cover the waterproof conductor, thereby producing an insulated core wire; Step S6: wrapping the insulating core wire with the semiconductive waterproof tape 20 using a high-speed wrapping machine; Step S7: extruding a lead alloy sheath 21 onto the outer surface of the semiconductive waterproof tape wrapped around the insulating core wire by a lead extruder; Step S8: coating the outer surface of the lead alloy sheath uniformly with the cable pitch; Step S9: removing moisture from the cable particles by a drying device; Step S10: feeding the cable particles into an extruder and extruding the cable sheath 22 out of the lead alloy sheath by the extruder; If the insulating core wire has a cross-linked polyethylene structure, the insulating core wire is sent to a degassing chamber to be degassed before step S6; if the insulating core wire has a polypropylene structure, there is no need to send it to a degassing chamber to be degassed.

[0019] 2 to 4, a cable producing apparatus is applicable to the cable producing method of claim 3, the drying apparatus including a drying box 1, an inlet 2 installed at the top of the drying box 1, two agitators 3 installed inside the drying box 1, a base 4 fixedly connected below the drying box 1, a first empty cavity 5 and a second empty cavity 6 provided inside the base 4, the first empty cavity 5 and the second empty cavity 6 arranged parallel to each other above and below, two belt pulleys 7 rotatably connected inside the first empty cavity 5, the two belt pulleys 7 connected to each other by a belt transmission, a first motor 8 fixedly connected inside the second empty cavity 6, an output end of the first motor 8 fixedly connected to one of the belt pulleys 7 by a shaft, and an intake pipe 9 and an exhaust pipe 10 communicating with both sides of the drying box 1, respectively.

[0020] To remove moisture from the cable particles, the cable particles are introduced into the drying box 1 through the inlet 2. Heated air is then drawn in through the intake pipe 9. The first motor 8, fixed in the second empty cavity 6 of the base 4, is started, and the output end of the first motor 8 drives the two agitators 3 via the belt pulley 7 and belt, both fixed in the first empty cavity 5. The cable particles enter the drying box 1 through the inlet 2 and gather directly below the inlet 2. The agitators 3 then move the cable particles to other positions in the drying box 1, dispersing them evenly within the drying box 1 and increasing the contact area between the heated air and the cable particles. The moisture in the cable particles is heated and evaporated, and the water vapor is exhausted from the drying box 1 through the exhaust pipe 10.

[0021] Referring to FIG. 6, in one embodiment of the present invention, the agitator 3 includes a stirring shaft 31, which is fixedly connected to a belt pulley 7, which is rotatably connected to the drying box 1 and the base 4, respectively, and a plurality of stirring blades 32 fixedly connected to the stirring shaft 31, which are arranged crosswise one above the other, and each stirring blade 32 has a metal ball 33 fixedly connected thereto. Two No. 1 magnets 11 are fixedly connected to the top of the drying box 1, and the two No. 1 magnets 11 are respectively located on both sides of the inlet 2. A No. 2 magnet 12 is fixedly connected in the first empty cavity 5, and the No. 2 magnet 12 corresponds to the No. 1 magnet 11, and the No. 2 magnet 12 is located in the center of the two belt pulleys 7.

[0022] To remove moisture from the cable particles more quickly, the output end of the first motor 8 drives the agitator shaft 31 via the belt pulley 7 and the belt, which then drives the metal ball 33 via the agitator blade 32. A magnetic field is formed between the first magnet 11 and the second magnet 12, and the metal ball 33 forms a closed circuit through the electric wire. As the metal ball 33 rotates, it cuts the magnetic flux lines, generating an induced current in the closed circuit, which generates heat energy. Due to the high thermal conductivity of the metal ball 33, its temperature rises quickly. As the metal ball 33 rotates along the agitator shaft 31, it comes into contact with the cable particles, increasing the heat between the cable particles and accelerating the evaporation of moisture between the cable particles. At the same time, as the moisture evaporates, it absorbs heat from the drying box 1. The metal ball 33 continuously supplies heat energy to the drying box 1, accelerating the removal of moisture from the cable particles.

[0023] Referring to FIG. 3, an inversion assembly 13 is installed in the dry box 1, and the inversion assembly 13 is used to invert the cable particles at the lower end of the dry box 1 to a position at the upper end of the dry box 1.

[0024] 3 and 4, the reversing assembly 13 includes a reversing plate 131, which is slidably connected to the agitator shaft 31, a sliding groove formed in the agitator shaft 31 for engaging with and slidably connecting the reversing plate 131, a spring 132 fixedly connected between the reversing plate 131 and the sliding groove, and a limiting plate 133 fixedly connected to a side wall of the drying box 1. Both ends of the limiting plate 133 have different horizontal heights, and the end of the reversing plate 131 away from the agitator shaft 31 is located at the upper end of the limiting plate 133.

[0025] The output end of the first motor 8 drives the agitator shaft 31 via the belt pulley 7 and the belt, rotating the reversing plate 131. The end of the reversing plate 131 away from the agitator shaft 31 rotates from the center of the drying box 1 toward one end of the drying box 1. During the rotation process, the end of the reversing plate 131 away from the agitator shaft 31 first contacts the lower end of the limiting plate 133. As the agitator shaft 31 rotates, the end of the reversing plate 131 away from the agitator shaft 31 gradually rises along with the limiting plate 133, stretching the spring 132 and forcing the cable particles at the lower end of the drying box 1 to the upper end of the drying box 1. During the rotation, the gap between the cable particles increases, increasing the contact area between the hot air and the cable particles and accelerating the evaporation rate. When the reversing plate 131 separates from the higher end of the limiting plate 133, the traction force exerted by the spring 132 on the limiting plate 133 is directed downward, lowering the height of the limiting plate 133.

[0026] 4 and 5, the stirring blade 32 is provided with an inverted T-shaped through groove 34 .

[0027] When the cable particles are put into the drying box 1, the cable particles pass through an inverted T-shaped through-groove 34, but since the upper end of the inverted T-shaped through-groove 34 is relatively large and the lower end is relatively small, the cable particles that have entered the inverted T-shaped through-groove 34 slowly flow out of the inverted T-shaped through-groove 34, and the stirring blade 32 rotates along the stirring shaft 31, so that the cable particles do not gather directly below the feed port 2 but are dispersed within the drying box 1.

[0028] Referring to Figures 3 to 6, a supply pipe 14 is provided in the base 4, the supply pipe 14 is connected to the drying box 1, a baffle 35 is fixedly connected to the stirring shaft 31, and the baffle 35 contacts the upper surface of the bottom of the drying box 1.

[0029] In order to facilitate the supply of the cable particles after drying, corresponding covers are provided on the supply pipe 14 and the inlet 2. After the moisture in the cable particles in the drying box 1 has completely evaporated, the cover on the supply pipe 14 is opened and the cable particles in the drying box 1 are supplied from the supply pipe 14. The baffle 35 rotates along the stirring shaft 31. During supply, the baffle 35 pushes the cable particles at both ends of the bottom of the drying box 1 around the supply pipe 14, allowing the cable particles to be supplied from the supply pipe 14.

[0030] The operating principle is as follows: To remove moisture from the cable particles, the cable particles are introduced into the drying box 1 through the inlet 2, heated air is drawn in through the intake pipe 9, and the first motor 8, fixed in the second empty cavity 6 of the base 4, is started. The output end of the first motor 8 drives the two agitators 3 via the belt pulley 7 and the belt, both fixed in the first empty cavity 5. When the cable particles are introduced into the drying box 1, they pass through the inverted T-shaped groove 34. Because the upper end of the inverted T-shaped groove 34 is relatively large and the lower end is relatively small, the cable particles entering the inverted T-shaped groove 34 slowly flow out of the groove 34. The agitating blade 32 rotates along the agitating shaft 31, so that the cable particles do not gather directly below the inlet 2 but are dispersed throughout the drying box 1, increasing the contact area between the heated air and the cable particles. The moisture in the cable particles is heated and evaporated, and the resulting water vapor is exhausted from the drying box 1 through the exhaust pipe 10. The stirring shaft 31 drives the stirring blade 32 to rotate the metal ball 33. A magnetic field is formed between the first magnet 11 and the second magnet 12, and the metal ball 33 forms a closed circuit through the electric wire. As the metal ball 33 rotates, it cuts the magnetic flux lines, generating an induced current in the closed circuit, which generates heat energy. Due to the high thermal conductivity of the metal ball 33, its temperature rises quickly. As the metal ball 33 rotates along the stirring shaft 31, it comes into contact with the cable particles, increasing the heat between the cable particles and accelerating the evaporation of the moisture between the cable particles. At the same time, as the moisture evaporates, it absorbs heat from the drying box 1. The metal ball 33 can continuously supply heat energy to the drying box 1, accelerating the removal of the moisture from the cable particles. The reversing plate 131 rotates along with the agitation shaft 31 , and the end of the reversing plate 131 away from the agitation shaft 31 rotates from the center of the drying box 1 toward one end of the drying box 1 .During the rotation process, the end of the reversing plate 131 away from the agitator shaft 31 first contacts the relatively low end of the limiting plate 133, and as the agitator shaft 31 rotates, the end of the reversing plate 131 away from the agitator shaft 31 gradually rises along with the limiting plate 133, stretching the spring 132 to revert the cable particles at the lower end of the drying box 1 to the upper end of the drying box 1. At the same time, the gaps between the cable particles increase, increasing the contact area between the hot air and the cable particles and accelerating the evaporation rate. When the reversing plate 131 separates from the relatively high end of the limiting plate 133, the traction force applied by the spring 132 to the limiting plate 133 is directed downward, lowering the height of the limiting plate 133.

[0031] It is clear that the above examples are merely provided for clarity and are not intended to limit the scope of the present invention. Those skilled in the art may make other modifications or variations based on the above description. It is not possible or necessary to list all the embodiments herein. Any obvious modifications or variations resulting therefrom are still within the scope of protection of the present invention. [Explanation of symbols]

[0032] 1 drying box 2 Inlet 3. Mixer 31 Agitator shaft 32 stirring blade 33 Metal Ball 34 Inverted T-shaped through groove 35 Baffle 4 Pedestal 5. First empty cavity 6 Second empty cavity 7 Belt pulley 8. First motor 9 Intake pipe 10 exhaust pipe 11 Magnet No. 1 12 Magnet No. 2 13 Inverted Assembly 131 Reversal Plate 132 Spring 133 Restriction Board 14 Supply pipe 15 Conductors 151 Optical Unit 152 carbon fiber tube 153 Stainless steel tube 16 Semi-conductive waterproof binding tape 17 Conductor shield layer 18 Insulating layer 19 Insulation shield layer 20 Semi-conductive waterproof tape 21 Lead alloy sheath 22 Cable sheath

Claims

1. A composite submarine cable, 1. A composite submarine cable comprising a conductor (15), the interior of which is hollow, a semiconductive waterproof binding tape (16) installed on the exterior of the conductor (15), the exterior of which is covered in turn with a conductor shield layer (17), an insulating layer (18) and an insulating shield layer (19), the exterior of which is covered with a semiconductive waterproof tape (20), the exterior of which is covered with a lead alloy sheath (21), and the exterior of which is covered with a cable sheath (22).

2. 2. The composite submarine cable according to claim 1, wherein the conductor (15) includes a plurality of conductor units, the plurality of conductor units being twisted together in the conductor (15), the conductor units including optical units (151), the optical units (151) being covered with a carbon fiber tube (152), and the carbon fiber tube (152) being covered with a stainless steel tube (153).

3. A cable production method applied to the composite submarine cable according to any one of claims 1 and 2, comprising: Step S1: extruding carbon fiber by a carbon fiber extruder to coat the optical unit (151), thereby producing a carbon fiber tube (152); Step S2: a stainless steel tape is molded and welded to the carbon fiber tube (152) by a tube arc welding machine, thereby producing a stainless steel tube (153); Step S3: twisting the drawn filaments into a conductor (15) using a frame-type twisting machine, and inserting a semiconductive waterproof tape every time one layer of the filaments is twisted, thereby ensuring the waterproof performance of the conductor (15); Step S4: wrapping the outermost layer of the waterproof conductor stranded wire with a semiconductive waterproof binding tape (16) using a high-speed wrapping machine; Step S5: extruding a conductor shield layer (17), an insulating layer (18) and an insulating shield layer (19) through a three-layer co-extrusion production line to cover the waterproof conductor, thereby producing an insulated core wire; Step S6: wrapping the insulating core wire with a semiconductive waterproof tape (20) using a high-speed wrapping machine; Step S7: extruding a lead alloy sheath (21) onto the outer surface of the semiconductive waterproof tape wrapped around the insulating core wire by a lead extruder; Step S8: coating the outer surface of the lead alloy sheath uniformly to the cable pitch; Step S9: removing moisture from the cable particles by a drying device; and step S10 of feeding the cable particles into an extruder and extruding a cable sheath (22) out of the lead alloy sheath by the extruder.

4. 4. The cable production method according to claim 3, wherein the insulated core wire has a cross-linked polyethylene structure or a polypropylene structure, and before step S6, the insulated core wire has a cross-linked polyethylene structure and is sent to a degassing chamber for degassing.

5. A cable production apparatus applicable to the cable production method according to any one of claims 3 to 4, comprising: The drying device includes a drying box (1), an inlet (2) installed at the top of the drying box (1), two agitators (3) installed inside the drying box (1), a base (4) fixedly connected below the drying box (1), a first empty cavity (5) and a second empty cavity (6) provided inside the base (4), the first empty cavity (5) and the second empty cavity (6) arranged parallel to each other above and below, two belt pulleys (7) rotatably connected inside the first empty cavity (5), the two belt pulleys (7) being power-transmittingly connected to each other by a belt, a first motor (8) fixedly connected inside the second empty cavity (6), an output end of the first motor (8) fixedly connected to one of the belt pulleys (7) by a shaft, and an intake pipe (9) and an exhaust pipe (10) respectively communicating with both sides of the drying box (1).

6. 6. The cable producing apparatus according to claim 5, wherein the agitator (3) comprises an agitator shaft (31), the agitator shaft (31) is fixedly connected to a belt pulley (7), the agitator shaft (31) is rotatably connected to the drying box (1) and the base (4), respectively; a plurality of agitator blades (32) are fixedly connected to the agitator shaft (31), the agitator blades (32) are arranged crosswise one above the other, and a metal ball (33) is fixedly connected to each of the agitator blades (32); two No. 1 magnets (11) are fixedly connected to the top of the drying box (1), the two No. 1 magnets (11) are respectively located on both sides of the inlet (2); a No. 2 magnet (12) is fixedly connected in the first empty cavity (5), the No. 2 magnet (12) corresponds to the No. 1 magnet (11), and the No. 2 magnet (12) is located in the center of the two belt pulleys (7).

7. 7. The cable production apparatus of claim 6, wherein an inversion assembly (13) is installed in the dry box (1), and the inversion assembly (13) is used to invert cable particles at the lower end of the dry box (1) to a position at the upper end of the dry box (1).

8. 8. The cable producing apparatus according to claim 7, wherein the reversing assembly (13) includes a reversing plate (131), the reversing plate (131) being slidably connected to the agitator shaft (31), a sliding groove being formed on the agitator shaft (31) for engaging with and slidably connecting the reversing plate (131), a spring (132) being fixedly connected between the reversing plate (131) and the sliding groove, a limiting plate (133) being fixedly connected to a side wall of the drying box (1), both ends of the limiting plate (133) having different horizontal heights, and the end of the reversing plate (131) away from the agitator shaft (31) being located at the upper end of the limiting plate (133).

9. 9. The cable production device according to claim 8, wherein the stirring blade (32) is provided with an inverted T-shaped through-groove (34).

10. 10. The cable producing apparatus according to claim 9, characterized in that a supply pipe (14) is provided in the base (4), the supply pipe (14) is connected to the drying box (1), a baffle (35) is fixedly connected to the stirring shaft (31), and the baffle (35) contacts the upper surface of the bottom of the drying box (1).