Cold-resistant cable and manufacturing process thereof

Abstract

The invention relates to the technical field of cold-resistant cables, and discloses a cold-resistant cable and a manufacturing process thereof, and the cold-resistant cable comprises a conductor which is formed by attaching a layer of plating silver to the outside of a tinned copper wire and twisting the tinned copper wire; the outer side of the conductor is provided with an aluminum foil shielding layer, and the aluminum foil shielding layer is formed by spirally winding an aluminum foil tape on the conductor through a filter tape and a wrapping device; an insulating layer II is arranged on the outer side of the heat insulating layer, the insulating layer II is made of a modified polyethylene insulating material, and a cold-resistant plasticizer and an anti-aging agent are added during manufacturing; an outer sheath layer is arranged on the outer side of the second insulating layer, the outer sheath layer is made of low-temperature-resistant silicone rubber, and an ultraviolet light absorber and an anti-rat-bite additive are added in the manufacturing process. The cable can adapt to various severe environments and low-temperature, humid and electromagnetic interference environments, various auxiliaries are added into the protective layer, good mechanical strength and protective performance are achieved, fire resistance and ultraviolet resistance are achieved, and damage caused by rat disasters is effectively avoided by adding the rat-bite-proof additive.

Description

Technical Field

[0001] The invention relates to the technical field of cold-resistant cables, in particular to a cold-resistant cable and a manufacturing process thereof. Background Art

[0002] Cold-resistant cables are cables designed to maintain stable performance in low-temperature environments. They can still maintain flexibility and electrical insulation properties at low temperatures. Cold-resistant cables are widely used in power systems, buildings and equipment in cold areas to ensure reliable operation under extreme weather conditions.

[0003] Cold-resistant cables use a special manufacturing process to ensure their reliability in low-temperature environments. Low temperatures affect the flexibility and insulation properties of the materials, so specific insulation and sheath materials are required. These materials are precisely selected and processed during the manufacturing process to ensure that the cables can still work effectively in cold conditions. At the same time, the manufacturing process includes strict testing and quality control to ensure that the cables will not fail or have safety issues caused by low temperatures in actual use.

[0004] In the production of cables in the prior art, due to cost considerations, most of the materials used during production are non-cold-resistant materials, which cause the cables to become hard and brittle in low temperature environments, resulting in reduced flexibility, affecting the normal use and installation of the cables. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a cold-resistant cable and a manufacturing process thereof, which solves the problem that the cable becomes hard and brittle in a low temperature environment, resulting in reduced flexibility and affecting the normal use and installation of the cable.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A cold-resistant cable, comprising:

[0008] Conductor, the conductor is made of tinned copper wire with a layer of silver coating attached to the outside;

[0009] An aluminum foil shielding layer, the aluminum foil shielding layer is arranged on the outside of the conductor, the aluminum foil shielding layer is made by spirally winding the aluminum foil tape on the conductor through a filter tape wrapping device, and an aluminum-magnesium wire braided mesh is arranged on the outside of the aluminum foil shielding layer, and the aluminum-magnesium wire braiding is braided by a mesh braiding device to braid the aluminum-magnesium alloy wire according to a certain braiding angle and rule;

[0010] Insulation layer one, the insulation layer one is arranged on the outside of the aluminum-magnesium wire woven mesh, the insulation layer one is made of polytetrafluoroethylene and cold-resistant rubber composite insulation material, and nano-silicon dioxide is added during the composite process, the insulation layer one is arranged on the outside of the insulation layer, the insulation layer material is aerogel felt, and a flame retardant is added during the manufacture, the insulation layer two is arranged on the outside of the insulation layer, the insulation layer two material is modified polyethylene insulation material, and a cold-resistant plasticizer and an anti-aging agent are added during the manufacture, the insulation layer two is arranged on the outside of the insulation layer, the outer sheath layer material is low-temperature resistant silicone rubber, and an ultraviolet absorber and a rat-proof additive are added during the manufacture.

[0011] Preferably, the outer diameter of the conductor is 1.5-2mm, the thickness of the silver plating is not less than 1-2 microns, the thickness of the aluminum foil shielding layer is 0.5-1mm, the thickness of the aluminum-magnesium wire woven mesh is 0.5-1.5mm, the thickness of the insulating layer one is 1-2mm, the amount of nano-silicon dioxide is 5-20 parts, the thickness of the thermal insulation layer is 1-2mm, the amount of the flame retardant is 10-30 parts, the thickness of the insulating layer two is 1.5-2.5mm, the amounts of the added cold-resistant plasticizer and anti-aging agent are 10-30 parts of cold-resistant plasticizer and 5-20 parts of anti-aging agent respectively, the outer sheath layer is 2-4mm, and the amounts of the ultraviolet absorber and the anti-rat bite additive are 0.3-0.8 parts of ultraviolet absorber and 5-15 parts of anti-rat bite additive respectively.

[0012] A manufacturing process for a cold-resistant cable comprises the following steps:

[0013] S1: Material processing, preparing the required conductor materials, insulation materials, sheath materials and other auxiliary materials, first by putting the conductor into the stranding device for stranding, and then mixing the other materials with the insulation materials and sheath materials separately during production through the mixing device;

[0014] S2: Conductor processing, preparing copper rod raw materials, sending them to the wire drawing device, the wire drawing device uses dies with different apertures to draw the thick copper rod into a single copper wire of the required diameter, the drawn copper wire enters the tinning device, the tinning time is determined according to the diameter of the copper wire and the production speed, and a uniform tin layer is formed on the surface of the copper wire. The tinned copper wire then enters the chemical silver plating equipment, and the silver ions are reduced to silver metal on the surface of the tinned copper wire through the prepared silver plating solution to form a layer of silver plating. Finally, multiple tinned and silver-plated copper wires are sent to the conductor twisting device to twist the copper wires together;

[0015] S3: Insulation extrusion, by drying the insulating material to remove moisture and impurities, start preheating to heat the barrel and die to the set extrusion temperature, and at the same time, preheat the mold to ensure that the insulating material can flow and form smoothly in the mold. Add the dried insulating material into the hopper of the extruder. The screw rotates under the drive of the motor to push, compact and plasticize the insulating material. The molten insulating material passes through the die and mold and is evenly coated on the conductor to form an insulating layer. Adjust the extrusion speed and pressure to ensure that the thickness of the insulating layer is uniform and the surface is smooth, and then cool it;

[0016] S4: Sheath extrusion, drying the insulating material to remove moisture and impurities, starting the preheating of the sheath extrusion device, heating the barrel, die head and die to the extrusion temperature, introducing the prepared insulated cable into the sheath extruder, ensuring that the cable is accurately and stably positioned when entering the extruder, starting the sheath extruder, and the screw rotating to push the sheath material forward. After being heated and melted, it is evenly coated on the insulated cable to form a sheath layer, and then cooled;

[0017] S5: Cooling, smoothly lead out the newly extruded cable with sheath from the extruder head, ensure that the cable is not twisted or bent during the leading-out process, and cool it down through an air cooling device or a water cooling device. Let the cable stay in the cooling device for a sufficient time to allow the sheath to be fully cooled and solidified. During the cooling process, keep the flow of the cooling medium uniform and stable. When the sheath is cooled to a suitable temperature, lead the cable out of the cooling device.

[0018] Preferably, in S1, the rotation speed of the mixing device is 200-500 rpm, the temperature is 15-30 degrees Celsius, and the humidity is 40-60%. The twisting device includes a twisting machine, and the rotation speed of the twisting machine is 10-30 rpm, the traction force is 10-20kN, the traction speed is 10-30 m / min, and the tension adjustment range is 50-200N.

[0019] Preferably, in S2, the wire drawing device includes a wire drawing machine, the speed of the wire drawing machine is 5-20 m / min, the tinning device includes a tinning machine, the temperature of the tinning machine is 200-300 degrees Celsius, the rotation speed of the conductor twisting device is 50-300 rpm, and the silver plating solution includes 1-2 g / L of silver ions, 5-30 g / L of copper ion complexing agent, 0.5-1.8 g / L of bithiazole compounds, 0.5-1.5 g / L of nitrogen-containing indole compounds, 0.05-0.075 g / L of benzotriazole, 40-60 ml / L of methanesulfonic acid, 0.5-1.3 g / L of polyphthalamide diphenylimide, 1-80 g / L of purine ligands, and 1-20 g / L of supporting electrolyte.

[0020] Preferably, in S3, the temperature of the extruder is 100-300 degrees Celsius, the preheating time is 30-60 minutes, the rotation speed is 10-150 rpm, the extrusion pressure is 5-30 MPa, and the die pressure is 2-10 MPa.

[0021] Preferably, in S4, the preheating time of the sheath extrusion device is 30-60 minutes, the temperature is 200-240 degrees Celsius, the extrusion speed is 5-100 rpm, the extrusion pressure is 8-35 MPa, and the die pressure is 3-12 MPa.

[0022] Preferably, in S5, the water flow of the cold water device is 8-20 cubic meters per hour, the water flow temperature is 10-30 degrees Celsius, the cooling time is 2-5 minutes, the wind speed of the air cooling device is 5-15 meters per second, and the cooling time is 5-15 minutes.

[0023] Preferably, the cold water device comprises a shell, the inner wall of the shell is fixedly connected to a motor 1, the output end of the motor 1 is fixedly provided with a worm 1, the tooth end of the worm 1 is meshed with a worm wheel 1, the inner wall of the worm wheel 1 is fixedly connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to the inner wall of the shell, the outer wall of the rotating shaft is fixedly connected to a gear 1, the tooth end of the gear 1 is meshed with a gear 2, the inner wall of the gear 2 is fixedly connected to a rotating rod, the outer wall of the rotating rod is rotatably connected to the inner wall of the shell, the outer wall of the rotating rod is fixedly connected to a fan gear, the inner wall of the fan gear is fixedly connected to the outer wall of the rotating shaft, the outer wall of the fan gear is meshed with a rack 1, the rear outer wall of the rack 1 is fixedly connected to a slider, the inner wall of the slider is slidably connected to a slide rail, the lower surface of the slide rail is fixedly connected to the upper surface of the shell, and the outer wall of the shell is provided with a cooling assembly; the cooling assembly comprises a cooling groove, the inner wall of the cooling groove is fixedly connected to the outer wall of the shell, and the front side of the shell The outer wall is fixedly connected with a bracket one, and the outer wall of the bracket one is fixedly connected with a motor two; a winding roller is fixedly provided at the output end of the motor two, a bracket two is provided on the upper surface of the cooling groove, a fan is provided on the inner wall of the bracket two, and a bearing block is fixedly connected to the upper surface of the slider; a rotating column is rotatably connected to the lower surface of the bearing block, and the lower surface of the rotating column is rotatably connected to the upper surface of the slider, and a motor three is fixedly connected to the upper surface of the slider, and a worm two is fixedly provided at the output end of the motor three; a worm gear two is meshingly connected with a worm wheel two at the tooth end of the worm wheel two, and the inner part of the worm wheel two is fixedly connected to the outer wall of the rotating column; a gear three is fixedly connected to the outer wall of the rotating column, and a rack two is meshingly connected with the tooth end of the gear three, and the upper surface of the rack two is slidably connected to the lower surface of the bearing block; a spring rod is fixedly connected to the outer wall of the rack two, and the outer wall of the spring rod is slidably connected to the inner wall of the bearing block; the outer wall of the spring rod is fixedly connected to a support block, and a spring baffle is provided on the inner wall of the support block.

[0024] The present invention provides a cold-resistant cable and a manufacturing process thereof, which has the following beneficial effects:

[0025] 1. The cold-resistant cable produced by the present invention can adapt to various harsh environments, such as low temperature, high temperature, humidity, and electromagnetic interference environment. By adding various additives in the protective layer, it can not only have good mechanical strength and protective performance when used, but also have fire resistance and UV resistance. The addition of anti-rat bite additives can effectively avoid damage caused by rat disasters when used.

[0026] 2. After the zinc plating liquid of the present invention forms a uniform tin layer on the surface of the copper wire, the silver plating liquid is used to reduce the surface of the tinned copper wire to form a silver metal plating layer. In this process, the zinc plating liquid achieves a preliminary protective effect on the conductor and improves the oxidation resistance of the copper wire. The tin layer can effectively prevent the copper wire from oxidizing in the air, prolong the service life of the conductor, ensure that the cable maintains good conductivity during long-term use, improve the welding quality, ensure the reliability of the connection, and reduce the effect of electrical failures caused by poor welding.

[0027] 3. The present invention adopts tinned copper wire with silver coating and twisted conductor to enhance the conductivity and oxidation resistance, ensure the stable signal transmission of the cable in long-term use, the aluminum foil and aluminum-magnesium wire braided mesh of the shielding layer effectively shield electromagnetic interference, protect the internal signal of the cable from the influence of external electromagnetic field, and improve the mechanical strength of the cable at the same time, the insulating layer adopts composite insulating material and modified polyethylene, and adds a variety of additives to improve the insulation performance, cold resistance and stability, so that the cable can still work normally in low temperature environment, the outer sheath layer is low temperature resistant silicone rubber, and ultraviolet absorber and anti-rat bite additive are added to protect the cable from external mechanical damage, chemical corrosion, ultraviolet radiation and rat bite damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a flow chart of the present invention;

[0029] Figure 2 is a three-dimensional diagram of the cold water device of the present invention;

[0030] Figure 3 It is a schematic diagram of a partial structure of a worm gear of a water chiller of the present invention;

[0031] Figure 4 It is a schematic diagram of the partial structure of the winding roller of the cold water device of the present invention;

[0032] Figure 5 It is a schematic diagram of the local structure of the spring rod of the cold water device of the present invention. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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.

[0034] Embodiment 1:

[0035] Please refer to the attached Figure 1 , an embodiment of the present invention provides a cold-resistant cable, comprising:

[0036] Conductor, the conductor is made of tinned copper wire with a layer of silver coating attached to the outside;

[0037] An aluminum foil shielding layer, the aluminum foil shielding layer is arranged on the outside of the conductor, the aluminum foil shielding layer is made by spirally winding the aluminum foil tape on the conductor through a filter tape wrapping device, and an aluminum-magnesium wire braided mesh is arranged on the outside of the aluminum foil shielding layer, and the aluminum-magnesium wire braiding is braided by a mesh braiding device to braid the aluminum-magnesium alloy wire according to a certain braiding angle and rule;

[0038] Insulation layer one, the insulation layer one is arranged on the outside of the aluminum-magnesium wire woven mesh, the insulation layer one is made of polytetrafluoroethylene and cold-resistant rubber composite insulation material, and nano-silicon dioxide is added during the composite process, the insulation layer one is arranged on the outside of the insulation layer, the insulation layer material is aerogel felt, and a flame retardant is added during the manufacture, the insulation layer two is arranged on the outside of the insulation layer, the insulation layer two material is modified polyethylene insulation material, and a cold-resistant plasticizer and an anti-aging agent are added during the manufacture, the insulation layer two is arranged on the outside of the insulation layer, the outer sheath layer material is low-temperature resistant silicone rubber, and an ultraviolet absorber and a rat-proof additive are added during the manufacture.

[0039] The outer diameter of the conductor is 1.5mm, the thickness of the silver plating is not less than 1 micron, the thickness of the aluminum foil shielding layer is 0.5mm, the thickness of the aluminum-magnesium wire braided mesh is 0.5mm, the thickness of the insulating layer one is 1mm, the amount of nano-silicon dioxide is 5 parts, the thickness of the thermal insulation layer is 1mm, the amount of flame retardant is 10 parts, the thickness of the insulating layer two is 1.5mm, the amounts of cold-resistant plasticizer and anti-aging agent added are 10 parts of cold-resistant plasticizer and 5 parts of anti-aging agent respectively, the outer sheath layer is 2mm, the amounts of ultraviolet absorber and anti-rat bite additive are 0.3 parts of ultraviolet absorber and 5 parts of anti-rat bite additive respectively.

[0040] The silver plating layer improves the conductivity and oxidation resistance of the conductor, reduces the contact resistance and prolongs the service life of the cable;

[0041] The aluminum foil shielding layer can shield electromagnetic interference, prevent the external electromagnetic field from interfering with the internal signal of the cable, and also reduce the radiation of the internal signal of the cable to the outside world.

[0042] The aluminum-magnesium wire braided mesh enhances the mechanical strength of the cable and protects the internal structure from external damage. At the same time, it works together with the aluminum foil shielding layer to further improve the shielding effect.

[0043] The insulation layer is made of polytetrafluoroethylene and cold-resistant rubber to isolate the conductor from the outside world, prevent current leakage, and ensure the safe operation of the cable;

[0044] The second insulation layer further enhances the insulation performance, provides double protection, and improves the voltage resistance and safety of the cable;

[0045] Nano-silicon dioxide enhances the mechanical strength and heat resistance of the insulation layer, improving the stability and reliability of the cable;

[0046] The thermal insulation layer reduces the heat transfer between the inside of the cable and the external environment, reduces the temperature rise of the cable in a high temperature environment, and protects the internal conductor and insulation layer;

[0047] Flame retardants give cables flame retardant properties, which can prevent the spread of fire and reduce fire losses in the event of a fire;

[0048] The outer sheath layer protects the internal structure of the cable from external mechanical damage, chemical corrosion and moisture intrusion. At the same time, adding cold-resistant plasticizers and anti-aging agents can improve the cold resistance and anti-aging properties of the cable and extend the service life of the cable.

[0049] Cold-resistant plasticizers keep the outer sheath layer flexible in low-temperature environments, preventing the cable from becoming hard, brittle and damaged in cold conditions;

[0050] Anti-aging agent delays the aging process of the outer sheath layer, so that it maintains good performance in long-term use;

[0051] UV absorbers absorb UV radiation, reduce UV damage to the outer sheath layer, and prevent the cable from aging and cracking due to UV exposure;

[0052] The anti-rodent additive makes the cable anti-rodent, thus preventing the cable from being damaged by animals such as rats and ensuring the safe operation of the cable.

[0053] A manufacturing process for a cold-resistant cable comprises the following steps:

[0054] S1: Material processing, preparing the required conductor materials, insulation materials, sheath materials and other auxiliary materials, first by putting the conductor into the stranding device for stranding, and then mixing the other materials with the insulation materials and sheath materials separately during production through the mixing device;

[0055] S2: Conductor processing, preparing copper rod raw materials, sending them to the wire drawing device, the wire drawing device uses dies with different apertures to draw the thick copper rod into a single copper wire of the required diameter, the drawn copper wire enters the tinning device, the tinning time is determined according to the diameter of the copper wire and the production speed, and a uniform tin layer is formed on the surface of the copper wire. The tinned copper wire then enters the chemical silver plating equipment, and the silver ions are reduced to silver metal on the surface of the tinned copper wire through the prepared silver plating solution to form a layer of silver plating. Finally, multiple tinned and silver-plated copper wires are sent to the conductor twisting device to twist the copper wires together;

[0056] S3: Insulation extrusion, by drying the insulating material to remove moisture and impurities, start preheating to heat the barrel and die to the set extrusion temperature, and at the same time, preheat the mold to ensure that the insulating material can flow and form smoothly in the mold. Add the dried insulating material into the hopper of the extruder. The screw rotates under the drive of the motor to push, compact and plasticize the insulating material. The molten insulating material passes through the die and mold and is evenly coated on the conductor to form an insulating layer. Adjust the extrusion speed and pressure to ensure that the thickness of the insulating layer is uniform and the surface is smooth, and then cool it;

[0057] S4: Sheath extrusion, drying the insulating material to remove moisture and impurities, starting the preheating of the sheath extrusion device, heating the barrel, die head and die to the extrusion temperature, introducing the prepared insulated cable into the sheath extruder, ensuring that the cable is accurately and stably positioned when entering the extruder, starting the sheath extruder, and the screw rotating to push the sheath material forward. After being heated and melted, it is evenly coated on the insulated cable to form a sheath layer, and then cooled;

[0058] S5: Cooling, smoothly lead out the newly extruded cable with sheath from the extruder head, ensure that the cable is not twisted or bent during the leading-out process, and cool it down through an air cooling device or a water cooling device. Let the cable stay in the cooling device for a sufficient time to allow the sheath to be fully cooled and solidified. During the cooling process, keep the flow of the cooling medium uniform and stable. When the sheath is cooled to a suitable temperature, lead the cable out of the cooling device.

[0059] In S1, the rotation speed of the mixing device is 200 rpm, the temperature is 15 degrees Celsius, the humidity is 40%, and the twisting device includes a twisting machine. The rotation speed of the twisting machine is 10 rpm, the traction force is 10 kN, the traction speed is 10 m / min, and the tension adjustment range is 50N.

[0060] The speed of the mixing device at 200 rpm can mix the materials quickly and evenly, ensuring that various additives (such as nano-silicon dioxide, flame retardants, etc.) are evenly distributed in the main material, improving the consistency and stability of the cable material performance. The temperature of 15°C and the humidity of 40% can ensure that the materials are in a more suitable environment during the mixing process, avoiding adverse effects of excessive temperature or humidity on material properties; the low speed of the twisting machine at 10 rpm can ensure that the twisting process is tight and stable, avoiding looseness or unevenness caused by too fast a speed. The twisted conductor has good integrity and mechanical strength. The 50N tension adjustment range can flexibly control the tension during the twisting process, so that the conductor structure after twisting is tight and the performance is stable, and it can also adapt to the twisting requirements of conductors of different specifications.

[0061] In S2, the wire drawing device includes a wire drawing machine, the speed of the wire drawing machine is 5 m / min, the tinning device includes a tinning machine, the temperature of the tinning machine is 200 degrees Celsius, the rotation speed of the conductor twisting device is 50 rpm, and the silver plating solution includes 1 g / L silver ions, 5 g / L copper ion complexing agent, 0.5 g / L bithiazole compounds, 0.5 g / L nitrogen-containing indole compounds, 0.05 g / L benzotriazole, 40 ml / L methane sulfonic acid, 0.5 g / L polyphthalamide diphenylimide, 1 g / L purine ligand, and 1 g / L supporting electrolyte.

[0062] The wire drawing device draws the thicker copper rod raw material into a single copper wire of the required diameter through a wire drawing machine, and accurately controls the diameter of the copper wire to meet the subsequent processing requirements. The speed of 5 meters / minute can ensure the stability of the wire drawing process and avoid the copper wire being broken or uneven due to excessive speed. The tinning device uses a tinning machine to plate a layer of tin on the surface of the copper wire. The temperature of 200 degrees Celsius ensures that the tin can adhere well to the surface of the copper wire, improve the oxidation resistance and weldability of the copper wire, extend the service life of the copper wire, and facilitate subsequent welding operations. The conductor twisting device twists multiple tinned copper wires together according to certain rules to form a conductor, ensuring that the conductor is tight The conductor after twisting has better flexibility and mechanical strength, and can reduce the skin effect and improve the conductivity. The silver plating solution attaches a layer of silver plating on the surface of the copper wire after tinning. The various components of silver ions work together to form a brighter white silver plating layer, which makes the silver plating layer have outstanding bonding strength and corrosion resistance. No pre-plating is required, which shortens the process flow and improves the reliability and service life of the circuit board. Benzotriazole enhances corrosion resistance, bithiazole compounds and nitrogen-containing indole compounds help to improve bonding strength and stability, and methanesulfonic acid and other ingredients adjust the plating solution environment to ensure the smooth progress of the silver plating reaction.

[0063] In S3, the temperature of the extruder is 100 degrees Celsius, the preheating time is 30 minutes, the rotation speed is 10 rpm, the extrusion pressure is 5 MPa, and the die pressure is 2 MPa.

[0064] The temperature is 100 degrees Celsius to make the insulating material reach a molten state, which can avoid defects such as decomposition or bubbles caused by overheating of the material; the preheating time is 30 minutes to ensure that the barrel, head and mold of the extruder reach the set working temperature, so that the material can start the normal extrusion process immediately after entering the extruder, reducing the impact of temperature fluctuations on the extrusion quality, avoiding cold spots and uneven thickness of the material during the extrusion process, and improving the consistency and quality stability of the product. By adjusting the extrusion amount and extrusion speed of the material by speed, the material can be fully plasticized and mixed in the barrel to ensure the uniform quality of the extruded material. At the same time, it also helps to control the stability of the extrusion process, avoiding large fluctuations in extrusion pressure and uneven thickness of the extrusion layer due to excessive speed. The molten material is pushed through the head and mold by the extrusion pressure to form the required shape and size. The head pressure ensures that the material can be evenly distributed in the mold to ensure the quality of the extrusion layer, which can improve the mechanical strength, insulation performance and environmental resistance of the extrusion layer and ensure the reliability of the cable during use.

[0065] In S4, the preheating time of the sheath extrusion device is 30 minutes, the temperature is 200 degrees Celsius, the extrusion speed is 5 rpm, the extrusion pressure is 8 MPa, and the die pressure is 3 MPa.

[0066] The preheating time of 30 minutes ensures that all parts of the sheath extrusion device, including the barrel, die, and mold, reach the set working temperature, prepare for the smooth extrusion of the sheath material, and enable the sheath material to start the normal extrusion process immediately after entering the extruder, thereby improving production efficiency and product quality stability. The temperature is 200 degrees Celsius to fully melt the sheath material and reach a flow state suitable for extrusion. At this temperature, the sheath material has good fluidity and can be evenly coated on the insulation layer or other structures of the cable to form a sheath layer with uniform thickness and smooth surface, thereby adjusting the extrusion amount and extrusion speed of the sheath material. A lower speed can make the material more fully plasticized and mixed in the barrel. A speed of 5 rpm can ensure a smooth extrusion process and avoid problems such as large fluctuations in extrusion pressure and uneven thickness of the sheath layer due to excessively fast speed. At the same time, it also helps to improve the quality of the sheath layer, making it more dense and uniform;

[0067] The extrusion pressure is 8MPa and the die pressure is 3MPa. The extrusion pressure pushes the molten sheath material through the die and the die to form the required sheath shape and size. The die pressure ensures that the material can be evenly distributed in the die, ensuring the quality of the sheath layer.

[0068] In S5, the water flow of the cold water device is 8 cubic meters per hour, the water flow temperature is 10 degrees Celsius, and the cooling time is 2 minutes.

[0069] The water flow of the cold water device provides enough water at 8 cubic meters per hour to quickly remove the heat generated by the jacket after extrusion, achieving efficient cooling. The water flow can absorb a large amount of heat in a short time to prevent the jacket from deformation, blistering and other quality problems due to untimely cooling. The water temperature of 10 degrees Celsius forms a large temperature difference with the high temperature of the jacket after extrusion, so that the heat is quickly transferred to the water flow, so that the jacket is quickly cooled to a temperature close to the water temperature. This ensures that the jacket is solidified in a short time, improving production efficiency and product quality.

[0070] Reference Figure 2 and Figure 3The cold water device includes a shell 1, the inner wall of the shell 1 is fixedly connected with a motor 101, the output end of the motor 101 is fixedly provided with a worm 102, the tooth end of the worm 102 is meshed with a worm wheel 103, the inner wall of the worm wheel 103 is fixedly connected with a rotating shaft 104, the outer wall of the rotating shaft 104 is fixedly connected to the inner wall of the shell 1, the outer wall of the rotating shaft 104 is fixedly connected with a gear 105, the tooth end of the gear 105 is meshed with a gear 2 106, the inner wall of the gear 2 106 is fixedly connected with a rotating rod 107, and the outer wall of the rotating rod 107 is rotatably connected to the inner wall of the shell 1, The outer wall of the rotating rod 107 is fixedly connected with a fan gear 108, the inner wall of the fan gear 108 is fixedly connected to the outer wall of the rotating shaft 104, the outer wall of the fan gear 108 is meshedly connected with a rack 109, the rear outer wall of the rack 109 is fixedly connected with a slider 110, the inner wall of the slider 110 is slidably connected with a slide rail 111, the lower surface of the slide rail 111 is fixedly connected to the upper surface of the shell 1, and the outer wall of the shell 1 is provided with a cooling assembly; the cooling assembly includes a cooling groove 2, the inner wall of the cooling groove 2 is fixedly connected to the outer wall of the shell 1, the front outer wall of the shell 1 is fixedly connected with a bracket 201, and the bracket 201 The outer wall of the housing 1 is fixedly connected to a motor 202; a winding roller 203 is fixedly provided at the output end of the motor 202, a bracket 204 is provided on the upper surface of the cooling tank 2, a fan 205 is provided on the inner wall of the bracket 204, and a bearing block 3 is fixedly connected to the upper surface of the slider 110; the motor 101 fixed to the inner wall of the housing 1 is started to drive the worm 102 to rotate so that the worm gear 103 rotates, the worm gear 103 drives the rotating shaft 104 to rotate so that the gear 105 rotates synchronously, the gear 105 drives the gear 2 106 to rotate so that the rotating rod 107 drives the fan gear 108 to rotate, and the rotating shaft 1 04 drives the fan gear 108 to rotate, so that the rack 109 drives the slider 110 to slide on the inner wall of the slide rail 111 to make reciprocating motion, thereby achieving the effect of making the cable evenly wound on the outer wall of the winding roller 203, and the cable can be cooled by passing the cable through the outer shell 1, and a fan 205 is provided in the bracket 204 fixed on the cooling groove 2. By starting the fan 205, the water attached to the cable can be blown away, and starting the motor 202 can make the winding roller 203 rotate on the inner wall of the bracket 201, so as to achieve the effect of making the cable wound on the winding roller 203.

[0071] Reference Figure 2 and Figure 4The lower surface of the supporting block 3 is rotatably connected to a rotating column 304, and the lower surface of the rotating column 304 is rotatably connected to the upper surface of the slider 110. The upper surface of the slider 110 is fixedly connected to a motor 301, and a worm 2 302 is fixedly provided at the output end of the motor 301; the tooth end of the worm 2 302 is meshingly connected to a worm wheel 2 303, and the inner wall of the worm wheel 2 303 is fixedly connected to the outer wall of the rotating column 304; the motor 301 fixed on the slider 110 is started to drive the worm 2 302 to rotate so that the worm wheel 2 303 rotates synchronously, and the rotation of the worm wheel 2 303 can drive the rotating column 304 to rotate while causing the gear 3 305 to rotate, thereby providing power for the rack 2 306 to drive the spring rod 307 to move.

[0072] Reference Figure 2 and Figure 5 The outer wall of the rotating column 304 is fixedly connected with a gear three 305, and the tooth end of the gear three 305 is meshingly connected with a rack two 306, and the upper surface of the rack two 306 is slidably connected to the lower surface of the bearing block 3; the outer wall of the rack two 306 is fixedly connected with a spring rod 307, and the outer wall of the spring rod 307 is slidably connected to the inner wall of the bearing block 3; the outer wall of the spring rod 307 is fixedly connected with a support block 308, and the inner wall of the support block 308 is provided with a spring baffle 309; the rotation of the gear three 305 can drive the rack two 306 to move so that the spring rod 307 slides on the inner wall of the bearing block 3, and the spring part thereon will provide power for the spring rod 307 to reset, and the spring baffle 309 on the support block 308 can scrape off the remaining water stains on the cable, thereby achieving the effect of ensuring the dryness of the cable.

[0073] When the device is needed, the cable is pulled out from the housing 1, and the motor three 301 is started to drive the worm two 302 to rotate so that the worm gear two 303 rotates synchronously. The rotation of the worm gear two 303 drives the rotating column 304 to rotate on the upper surface of the slider 110 so that the gear three 305 rotates further. The rotation of the gear three 305 can drive the rack two 306 to slide so that the spring rod 307 moves on the inner wall of the bearing block 3. The spring part on the spring rod 307 can provide power for the reset of the support block 308. A spring baffle 309 is provided on the inner wall of the support block 308 to scrape off the water stains on the wire, or a sponge block is fixed on the outer wall of the spring baffle 309 to absorb the water stains, thereby achieving the effect of keeping the cable dry. The motor two 202 fixed on the bracket one 201 is started to drive the winding roller 203 to rotate, thereby The cable is wound up, and the fan 205 arranged on the bracket 204 can blow off some water stains on the cable. The motor 101 fixed on the inner wall of the shell 1 is started to drive the worm 102 to rotate, so that the worm wheel 103 rotates stably and drives the rotating shaft 104 to drive the gear 105 and the fan gear 108 fixed thereon to rotate. The rotation of the gear 105 drives the gear 2 106 to rotate, which can make the fan gear 108 fixed on the rotating rod 107 rotate. The two fan gears 108 can drive the rack 109 to drive the slider 110 to slide on the inner wall of the slide rail 111. On the one hand, the device can achieve the effect of evenly winding the cable around the outer wall of the winding roller 203 by reciprocating motion. On the other hand, it can achieve the effect of being suitable for cables of different diameters and keeping the cable dry.

[0074] Embodiment 2:

[0075] The outer diameter of the conductor is 2mm, the thickness of the silver plating is not less than 2 microns, the thickness of the aluminum foil shielding layer is 1mm, the thickness of the aluminum-magnesium wire braided mesh is 1.5mm, the thickness of the insulating layer one is 2mm, the amount of nano-silicon dioxide is 20 parts, the thickness of the thermal insulation layer is 2mm, the amount of flame retardant is 30 parts, the thickness of the insulating layer two is 2.5mm, the amounts of cold-resistant plasticizer and anti-aging agent added are 30 parts of cold-resistant plasticizer, 20 parts of anti-aging agent, the outer sheath layer is 4mm, the amounts of ultraviolet absorber and anti-rat bite additive are 0.8 parts of ultraviolet absorber and 15 parts of anti-rat bite additive respectively.

[0076] In S1, the rotation speed of the mixing device is 500 rpm, the temperature is 30 degrees Celsius, the humidity is 60%, and the twisting device includes a twisting machine. The rotation speed of the twisting machine is 30 rpm, the traction force is 20 kN, the traction speed is 30 m / min, and the tension adjustment range is 200N.

[0077] In S2, the wire drawing device includes a wire drawing machine, the speed of the wire drawing machine is 20 meters / minute, the tinning device includes a tinning machine, the temperature of the tinning machine is 300 degrees Celsius, the rotation speed of the conductor twisting device is 300 revolutions / minute, and the silver plating solution includes 2g / L silver ions, 30g / L copper ion complexing agent, 1.8g / L bithiazole compounds, 1.5g / L nitrogen-containing indole compounds, 0.075g / L benzotriazole, 60ml / L methanesulfonic acid, 1.3g / L polyphthalamide diphenylimide, 80g / L purine ligands, and 20g / L supporting electrolyte.

[0078] In S3, the temperature of the extruder is 300 degrees Celsius, the preheating time is 60 minutes, the rotation speed is 150 rpm, the extrusion pressure is 30 MPa, and the die pressure is 10 MPa.

[0079] In S4, the preheating time of the sheath extrusion device is 60 minutes, the temperature is 240 degrees Celsius, the extrusion speed is 100 rpm, the extrusion pressure is 35 MPa, and the die pressure is 12 MPa.

[0080] In S5, the wind speed of the air cooling device is 15 m / s and the cooling time is 15 minutes.

[0081] The air cooling device has a wind speed of 15 m / s. The high-speed air flow takes away the heat on the surface of the jacket to achieve a cooling effect. It can form a strong airflow on the surface of the jacket to accelerate the heat dissipation. Compared with natural cooling, air cooling can reduce the temperature of the jacket more quickly and improve production efficiency. At the same time, air cooling can prevent the jacket from contacting with water, reducing quality problems caused by residual moisture, and cooling for 15 minutes. During this time, the jacket can fully dissipate heat, making its performance more stable.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold-resistant cable, characterized in that: include: Conductor, the conductor is made of tinned copper wire with a layer of silver coating attached to the outside; An aluminum foil shielding layer, the aluminum foil shielding layer is arranged on the outside of the conductor, the aluminum foil shielding layer is made by spirally winding the aluminum foil tape on the conductor through a filter tape wrapping device, and an aluminum-magnesium wire braided mesh is arranged on the outside of the aluminum foil shielding layer, and the aluminum-magnesium wire braiding is braided by a mesh braiding device to braid the aluminum-magnesium alloy wire according to a certain braiding angle and rule; Insulation layer one, the insulation layer one is arranged on the outside of the aluminum-magnesium wire woven mesh, the insulation layer one is made of polytetrafluoroethylene and cold-resistant rubber composite insulation material, and nano-silicon dioxide is added during the composite process, the insulation layer one is arranged on the outside of the insulation layer, the insulation layer material is aerogel felt, and a flame retardant is added during the manufacture, the insulation layer two is arranged on the outside of the insulation layer, the insulation layer two material is modified polyethylene insulation material, and a cold-resistant plasticizer and an anti-aging agent are added during the manufacture, the insulation layer two is arranged on the outside of the insulation layer, the outer sheath layer material is low-temperature resistant silicone rubber, and an ultraviolet absorber and a rat-proof additive are added during the manufacture.

2. A cold-resistant cable according to claim 1, characterized in that: The outer diameter of the conductor is 1.5-2mm, the thickness of the silver plating is not less than 1-2 microns, the thickness of the aluminum foil shielding layer is 0.5-1mm, the thickness of the aluminum-magnesium wire braided mesh is 0.5-1.5mm, the thickness of the insulating layer one is 1-2mm, the amount of nano-silicon dioxide is 5-20 parts, the thickness of the thermal insulation layer is 1-2mm, the amount of the flame retardant is 10-30 parts, the thickness of the insulating layer two is 1.5-2.5mm, the amounts of the added cold-resistant plasticizer and anti-aging agent are 10-30 parts of the cold-resistant plasticizer and 5-20 parts of the anti-aging agent, the outer sheath layer is 2-4mm, and the amounts of the ultraviolet absorber and the anti-rat bite additive are 0.3-0.8 parts of the ultraviolet absorber and 5-15 parts of the anti-rat bite additive.

3. A manufacturing process for a cold-resistant cable, characterized in that: A cold-resistant cable according to any one of claims 1 to 2, comprising the following steps: S1: Material processing, preparing the required conductor materials, insulation materials, sheath materials and other auxiliary materials, first by putting the conductor into the stranding device for stranding, and then mixing the other materials with the insulation materials and sheath materials separately during production through the mixing device; S2: Conductor processing, preparing copper rod raw materials, sending them to the wire drawing device, the wire drawing device uses dies with different apertures to draw the thick copper rod into a single copper wire of the required diameter, the drawn copper wire enters the tinning device, the tinning time is determined according to the diameter of the copper wire and the production speed, and a uniform tin layer is formed on the surface of the copper wire. The tinned copper wire then enters the chemical silver plating equipment, and the silver ions are reduced to silver metal on the surface of the tinned copper wire through the prepared silver plating solution to form a layer of silver plating. Finally, multiple tinned and silver-plated copper wires are sent to the conductor twisting device to twist the copper wires together; S3: Insulation extrusion, by drying the insulating material to remove moisture and impurities, start preheating to heat the barrel and die to the set extrusion temperature, and at the same time, preheat the mold to ensure that the insulating material can flow and form smoothly in the mold. Add the dried insulating material into the hopper of the extruder. The screw rotates under the drive of the motor to push, compact and plasticize the insulating material. The molten insulating material passes through the die and mold and is evenly coated on the conductor to form an insulating layer. Adjust the extrusion speed and pressure to ensure that the thickness of the insulating layer is uniform and the surface is smooth, and then cool it; S4: Sheath extrusion, drying the insulating material to remove moisture and impurities, starting the preheating of the sheath extrusion device, heating the barrel, die head and die to the extrusion temperature, introducing the prepared insulated cable into the sheath extruder, ensuring that the cable is accurately and stably positioned when entering the extruder, starting the sheath extruder, and the screw rotating to push the sheath material forward. After being heated and melted, it is evenly coated on the insulated cable to form a sheath layer, and then cooled; S5: Cooling, smoothly lead out the newly extruded cable with sheath from the extruder head, ensure that the cable is not twisted or bent during the leading-out process, and cool it down through an air cooling device or a water cooling device. Let the cable stay in the cooling device for a sufficient time to allow the sheath to be fully cooled and solidified. During the cooling process, keep the flow of the cooling medium uniform and stable. When the sheath is cooled to a suitable temperature, lead the cable out of the cooling device.

4. A cold-resistant cable and a manufacturing process thereof according to claim 3, characterized in that: In S1, the rotation speed of the mixing device is 200-500 rpm, the temperature is 15-30 degrees Celsius, and the humidity is 40-60%. The twisting device includes a twisting machine, and the rotation speed of the twisting machine is 10-30 rpm, the traction force is 10-20kN, the traction speed is 10-30 m / min, and the tension adjustment range is 50-200N.

5. A cold-resistant cable and a manufacturing process thereof according to claim 3, characterized in that: In S2, the wire drawing device includes a wire drawing machine, the speed of the wire drawing machine is 5-20 m / min, the tinning device includes a tinning machine, the temperature of the tinning machine is 200-300 degrees Celsius, the rotation speed of the conductor twisting device is 50-300 rpm, and the silver plating solution includes 1-2 g / L of silver ions, 5-30 g / L of copper ion complexing agent, 0.5-1.8 g / L of bithiazole compounds, 0.5-1.5 g / L of nitrogen-containing indole compounds, 0.05-0.075 g / L of benzotriazole, 40-60 ml / L of methanesulfonic acid, 0.5-1.3 g / L of polyphthalamide diphenylimide, 1-80 g / L of purine ligands, and 1-20 g / L of supporting electrolyte.

6. A cold-resistant cable and a manufacturing process thereof according to claim 3, characterized in that: In S3, the temperature of the extruder is 100-300 degrees Celsius, the preheating time is 30-60 minutes, the rotation speed is 10-150 rpm, the extrusion pressure is 5-30 MPa, and the die pressure is 2-10 MPa.

7. A cold-resistant cable and a manufacturing process thereof according to claim 3, characterized in that: In S4, the preheating time of the sheath extrusion device is 30-60 minutes, the temperature is 200-240 degrees Celsius, the extrusion speed is 5-100 rpm, the extrusion pressure is 8-35 MPa, and the die pressure is 3-12 MPa.

8. A cold-resistant cable and a manufacturing process thereof according to claim 3, characterized in that: In S5, the water flow of the cold water device is 8-20 cubic meters per hour, the water flow temperature is 10-30 degrees Celsius, the cooling time is 2-5 minutes, the wind speed of the air cooling device is 5-15 meters per second, and the cooling time is 5-15 minutes.

9. A cold-resistant cable and a manufacturing process thereof according to claim 8, characterized in that: The cold water device comprises a shell (1), the inner wall of the shell (1) is fixedly connected to a motor 1 (101), the output end of the motor 1 (101) is fixedly provided with a worm 1 (102), the tooth end of the worm 1 (102) is meshed with a worm wheel 1 (103), the inner wall of the worm wheel 1 (103) is fixedly connected to a rotating shaft (104), the outer wall of the rotating shaft (104) is fixedly connected to the inner wall of the shell (1), the outer wall of the rotating shaft (104) is fixedly connected to a gear 1 (105), the tooth end of the gear 1 (105) is meshed with a gear 2 (106), the inner wall of the gear 2 (106) is fixedly connected to a rotating rod (107), and the outer wall of the rotating rod (107) is rotatably connected to the shell. The outer wall of the rotating rod (107) is fixedly connected to a fan gear (108), the inner wall of the fan gear (108) is fixedly connected to the outer wall of the rotating shaft (104), the outer wall of the fan gear (108) is meshingly connected to a rack (109), the rear outer wall of the rack (109) is fixedly connected to a slider (110), the inner wall of the slider (110) is slidably connected to a slide rail (111), the lower surface of the slide rail (111) is fixedly connected to the upper surface of the outer shell (1), and the outer wall of the outer shell (1) is provided with a cooling assembly; the cooling assembly includes a cooling groove (2), the inner wall of the cooling groove (2) is fixedly connected to the outer wall of the outer shell (1), and the front outer wall of the outer shell (1) is fixedly connected to A bracket (201), the outer wall of which is fixedly connected to a motor (202); a winding roller (203) is fixedly provided at the output end of the motor (202); a bracket (204) is provided on the upper surface of the cooling trough (2); a fan (205) is provided on the inner wall of the bracket (204); a bearing block (3) is fixedly connected to the upper surface of the slider (110); a rotating column (304) is rotatably connected to the lower surface of the bearing block (3); the lower surface of the rotating column (304) is rotatably connected to the upper surface of the slider (110); a motor (301) is fixedly connected to the upper surface of the slider (110); a worm (203) is fixedly provided at the output end of the motor (301); 302); the tooth end of worm gear 2 (302) is meshingly connected with worm wheel 2 (303), and the inner part of worm wheel 2 (303) is fixedly connected to the outer wall of rotating column (304); the outer wall of rotating column (304) is fixedly connected with gear 3 (305), and the tooth end of gear 3 (305) is meshingly connected with rack 2 (306), and the upper surface of rack 2 (306) is slidably connected to the lower surface of bearing block (3); the outer wall of rack 2 (306) is fixedly connected with spring rod (307), and the outer wall of spring rod (307) is slidably connected to the inner wall of bearing block (3); the outer wall of spring rod (307) is fixedly connected with supporting block (308), and the inner wall of supporting block (308) is provided with spring baffle (309).

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