Manufacturing method of airtight cable for ship

Abstract

The invention relates to the technical field of cable preparation, and discloses a manufacturing method of an airtight cable for ships, the cable is characterized in that a wrapping layer, a water-blocking buffer layer, a middle reinforcing layer and an external protective layer are sequentially arranged outside a cable core, the cable core is formed by twisting a plurality of wire cores, and glass fiber filling ropes are filled in gaps of the wire cores; the wrapping layer is a protective layer wrapping the periphery of the conductor in the cable structure, is made of an insulating material, and can prevent current leakage and improve the electrical performance of the cable; the water-blocking buffer layer wraps the wrapping layer, is made of water-blocking powder, and is used for preventing water from permeating into the cable and providing mechanical protection and buffer effects at the same time; the middle reinforcing layer is usually made of fibers, copper wires or steel wires and can provide additional mechanical protection and electrical performance; the external protection layer is made of polyvinyl chloride and polyethylene materials and is used for protecting the cable from being damaged by external physical, chemical and environmental factors.

Description

Technical Field

[0001] The invention relates to the technical field of cable preparation, in particular to a method for preparing an airtight cable for ships. Background Art

[0002] In the design and manufacture of ship cables, cables are usually composed of conductors, insulation layers, shielding layers and sheaths. The conductor is used to transmit current and is usually made of metal materials such as copper or aluminum; the insulation layer is used to prevent current leakage and is usually made of materials such as plastic or rubber; the shielding layer is used to prevent electromagnetic interference and is usually made of materials such as metal wire or metal foil; the sheath is used to protect the entire cable structure and is usually made of wear-resistant and corrosion-resistant materials.

[0003] Airtightness technology mainly refers to the technology of how to prevent gas from penetrating into the inside of the cable. This usually involves the selection of materials, control of manufacturing processes, design of structures, etc. For example, the prior art discloses CN206639599U airtight cable, which includes a copper conductor, which is composed of a plurality of oxygen-free copper strands twisted together, and the twisted gap is filled with special liquid silicone to solidify to form an airtight structure, the copper conductor is coated with a cross-linked polyethylene insulation layer, and the cross-linked polyethylene insulation layer is sealed and filled with special liquid silicone, the cross-linked polyethylene insulation layer is coated with a halogen-free low-smoke flame-retardant inner sheath layer, and a water-blocking buffer layer is provided in the halogen-free low-smoke flame-retardant inner sheath layer, and the water-blocking buffer layer is a mixture of water-blocking paste and water-blocking powder; the halogen-free low-smoke flame-retardant inner sheath layer is coated with a halogen-free low-smoke flame-retardant outer sheath layer, and an aluminum-polyethylene bonding layer is provided between the halogen-free low-smoke flame-retardant outer sheath layer and the halogen-free low-smoke flame-retardant inner sheath layer. The utility model is provided with multiple airtight and waterproof structures, and adopts special liquid silica gel to solidify to form an airtight overall structure.

[0004] In the prior art, fillers are used to achieve the purpose of blocking water and preventing gas penetration. However, during the filling process, the fillers may not be fully filled, resulting in insufficient airtightness. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a method for manufacturing an airtight cable for ships.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing an airtight cable for ships, wherein the cable is provided with a wrapping layer, a water-blocking buffer layer, an intermediate reinforcement layer and an outer protective layer in sequence outside the cable core, the cable core is twisted by multiple cores, and the gaps between the cores are filled with glass fiber filling ropes; The sheath is a protective layer wrapped around the conductor in the cable structure. It is made of insulating material and can prevent current leakage and improve the electrical performance of the cable. The water-blocking buffer layer is wrapped outside the wrapping layer and is made of water-blocking powder. It is used to prevent moisture from penetrating into the cable while providing mechanical protection and buffering effects. The middle reinforcement layer is often made of fiber, copper wire or steel wire materials, which can provide additional mechanical protection and electrical performance; The outer protective layer is made of polyvinyl chloride and polyethylene materials to protect the cable from damage by external physical, chemical and environmental factors.

[0007] Preferably, the wrapping layer comprises an inner layer, a middle layer and an outer layer; The inner layer uses plastic materials with high insulation performance, providing higher resistivity, which can effectively prevent current leakage, resist corrosion from various chemicals, extend the service life of the cable, improve tensile strength and compressive strength, and withstand greater mechanical stress; The middle layer uses a rubber material with high elasticity and flexibility, which provides elasticity, can withstand greater deformation without breaking, and provides aging resistance and flexibility; The outer layer uses a metal material with high mechanical strength and shielding properties, which provides tensile strength and compressive strength, has conductivity, can effectively shield external electromagnetic interference, and provides corrosion resistance.

[0008] Preferably, the water-blocking buffer layer is made of water-blocking powder, plastic and rubber. The water-blocking powder expands rapidly after contacting water to form a gel-like substance to block the water seepage channel. Plastic provides insulating properties and mechanical strength; rubber provides elasticity and flexibility.

[0009] Preferably, the intermediate reinforcement layer includes a fiber braided layer, a copper wire braided layer and a steel wire braided layer; The fiber braided layer is usually made of cotton yarn and linen materials, which improves the tear resistance of the cable and protects the insulation layer from erosion by various light, heat, moisture, low temperature, acid and alkali gases and damage by external mechanical forces, ensuring the reliable operation of the cable; The copper wire braided layer can provide electromagnetic shielding, prevent electromagnetic interference, eliminate the surface potential of the power cable, and play the role of binding the power line and eliminating induced electricity; The steel wire braid layer can provide mechanical protection, prevent the cable from mechanical damage, and bear the longitudinal tensile force.

[0010] Preferably, the outer protective layer includes a plastic wrapping layer, a rubber wrapping layer and a metal wrapping layer; The plastic wrapping layer is made of polyvinyl chloride, polyethylene and polypropylene, has good physical properties and chemical stability, and can provide good protection effect; The rubber wrapping layer has excellent elasticity, tensile strength, elongation, wear resistance, tear resistance and compression permanent deformation performance, and good electrical insulation; The metal wrapping layer has good mechanical properties and corrosion resistance and can provide extremely high protection effect.

[0011] Preferably, the preparation method of each of the above-mentioned protective layers is: It includes the following steps: Material preparation: Mix the materials of each protective layer evenly in a certain proportion; Heating and melting: heating the mixed materials to a molten state for subsequent processing; Extrusion molding: The molten material is extruded through an extruder to form a protective layer with a certain thickness and width; Cooling and solidification: The extruded water-blocking buffer layer is cooled and solidified by a cooling device to form a solid protective layer; Quality inspection: Carry out quality inspection on the prepared water-blocking buffer layer to ensure that its various performance indicators meet the requirements.

[0012] Preferably, the specific steps include: Manufacturing of wire core conductor: Take metal monofilament and use stranding machine to manufacture; Wrap manufacturing: extruding the wrap on the conductor and wrapping the wrap on the conductor; Water-blocking buffer layer manufacturing: wrapping the water-blocking buffer layer on the wrapping layer; Filling: twist multiple prepared wire cores and glass fiber filling ropes together to form a cable core, and use a back-twisting cabling machine for twisting; Manufacturing of the intermediate reinforcement layer: Fiber, copper wire and steel wire are used to weave the water-blocking buffer layer, with a weaving coverage rate of not less than 90%, and a weaving machine is used to manufacture the weaving layer; External protective layer manufacturing: Add a sheath outside the braided intermediate reinforcement layer to protect the entire cable structure Compared with the prior art, the present invention provides a method for manufacturing an airtight cable for ships, which has the following beneficial effects: 1. The manufacturing method of the airtight cable for ships is as follows: a wrapping layer, a water-blocking buffer layer, an intermediate reinforcement layer and an external protective layer are sequentially arranged outside the cable core, and a glass fiber filling rope is filled. The core and the filling rope are combined by twisting to make the filler fit the core more closely. At the same time, each protective layer has the effects of protection and barrier, so as to achieve better waterproof effect and higher air tightness.

[0013] 2. The manufacturing method of the ship's airtight cable provides multiple functions such as physical protection, prevention of moisture intrusion, and prevention of chemical corrosion by providing a wrapping layer on the outside of the wire core. The wrapping layer can prevent the cable from being mechanically damaged, prevent moisture from intruding into the interior of the cable, thereby preventing the degradation of the cable's electrical performance, prevent the cable from being chemically corroded, and prevent the cable from short circuiting and other electrical faults, thereby improving the safety of the cable.

[0014] 3. The manufacturing method of the airtight cable for ships, the wrapping layer includes an inner layer, a middle layer and an outer layer, the inner layer uses a plastic material with high insulation performance, the middle layer uses a rubber material with high elasticity and flexibility, and the outer layer uses a metal material with high mechanical strength and shielding performance. The combination of the three provides higher resistivity, can effectively prevent current leakage, resist corrosion from various chemicals, extend the service life of the cable, improve tensile strength and compressive strength, can withstand greater mechanical stress, provide elasticity, can withstand greater deformation without breaking, provide aging resistance and flexibility, provide tensile strength and compressive strength, have conductivity, can effectively shield external electromagnetic interference, provide corrosion resistance, and better improve the airtightness of the cable.

[0015] 4. The manufacturing method of the airtight cable for ships is that the water-blocking powder of the water-blocking buffer layer can absorb deionized water that is hundreds or thousands of times heavier than itself, and becomes a gel after absorbing water. It is difficult to squeeze out water even under pressure, so that the water-blocking buffer layer can effectively prevent moisture from invading the interior of the cable, which can effectively improve the airtightness of the cable, thereby extending the service life of the cable and improving the safety of the cable.

[0016] 5. The manufacturing method of the airtight cable for ships, the middle reinforcement layer includes a fiber braided layer, a copper wire braided layer and a steel wire braided layer. The fiber braided layer is usually made of cotton yarn and linen material to improve the tearing strength of the cable, protect the insulating layer from various light, heat, moisture, low temperature, acid and alkali gas erosion and external mechanical force damage, and ensure the reliable operation of the cable; the copper wire braided layer can provide electromagnetic shielding, prevent electromagnetic interference, eliminate the surface potential of the power cable, and play a role in binding the power line and eliminating induced electricity; the steel wire braided layer can provide mechanical protection, prevent the cable from mechanical damage, bear the longitudinal breaking force, and better improve the airtightness.

[0017] 6. The manufacturing method of the airtight cable for ships, the outer protective layer includes a plastic wrapping layer, a rubber wrapping layer and a metal wrapping layer, has good physical properties and chemical stability, can provide good protection effect, has excellent elasticity, tensile strength, elongation, wear resistance, tear resistance and compression permanent deformation performance, good electrical insulation, good mechanical properties and corrosion resistance, and can provide extremely high protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cable structure of the present invention. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1 , a method for making a gas-tight cable for ships, the specific steps include: Manufacturing of wire core conductor: Take metal monofilament and use stranding machine to manufacture; Wrap manufacturing: extruding the wrap on the conductor and wrapping the wrap on the conductor; Water-blocking buffer layer manufacturing: wrapping the water-blocking buffer layer on the wrapping layer; Filling: twist multiple prepared wire cores and glass fiber filling ropes together to form a cable core, and use a back-twisting cabling machine for twisting; Manufacturing of the intermediate reinforcement layer: Fiber, copper wire and steel wire are used to weave the water-blocking buffer layer, with a weaving coverage rate of not less than 90%, and a weaving machine is used to manufacture the weaving layer; Outer protective layer manufacturing: A sheath is added outside the braided intermediate reinforcement layer to protect the entire cable structure.

[0021] The cable is provided with a wrapping layer, a water-blocking buffer layer, an intermediate reinforcement layer and an external protective layer in sequence outside the cable core. The cable core is twisted by multiple cores, and the gaps between the cores are filled with glass fiber filling ropes. The sheath is a protective layer wrapped around the conductor in the cable structure. It is made of insulating material and can prevent current leakage and improve the electrical performance of the cable. The sheath includes an inner layer, a middle layer and an outer layer. The inner layer uses plastic materials with high insulation performance, providing higher resistivity, which can effectively prevent current leakage, resist corrosion from various chemicals, extend the service life of the cable, improve tensile strength and compressive strength, and withstand greater mechanical stress; The middle layer uses a rubber material with high elasticity and flexibility, which provides elasticity, can withstand greater deformation without breaking, and provides aging resistance and flexibility; The outer layer uses a metal material with high mechanical strength and shielding properties, which provides tensile strength and compressive strength, has conductivity, can effectively shield external electromagnetic interference, and provides corrosion resistance.

[0022] 4. The water-blocking buffer layer is wrapped outside the wrapping layer and is made of water-blocking powder. It is used to prevent moisture from penetrating into the cable and provide mechanical protection and buffering effects. The water-blocking buffer layer is made of water-blocking powder, plastic and rubber. The water-blocking powder expands rapidly after contacting with moisture to form a gel-like substance, blocking the water seepage channel. Plastic provides insulating properties and mechanical strength; rubber provides elasticity and flexibility.

[0023] The middle reinforcement layer is usually made of fiber, copper wire or steel wire materials, which can provide additional mechanical protection and electrical performance; the middle reinforcement layer includes fiber braided layer, copper wire braided layer and steel wire braided layer; The fiber braided layer is usually made of cotton yarn and linen materials, which improves the tear resistance of the cable and protects the insulation layer from erosion by various light, heat, moisture, low temperature, acid and alkali gases and damage by external mechanical forces, ensuring the reliable operation of the cable; The copper wire braided layer can provide electromagnetic shielding, prevent electromagnetic interference, eliminate the surface potential of the power cable, and play a role in binding the power lines and eliminating induced electricity; The steel wire braid layer can provide mechanical protection, prevent the cable from mechanical damage, and bear the longitudinal tensile force.

[0024] The outer protective layer is made of polyvinyl chloride and polyethylene materials to protect the cable from damage by external physical, chemical and environmental factors; The external protective layer includes a plastic wrapping layer, a rubber wrapping layer and a metal wrapping layer; The plastic wrapping layer is made of polyvinyl chloride, polyethylene and polypropylene, has good physical properties and chemical stability, and can provide good protection effect; The rubber wrapping layer has excellent elasticity, tensile strength, elongation, wear resistance, tear resistance and compression permanent deformation performance, and good electrical insulation; The metal wrapping layer has good mechanical properties and corrosion resistance and can provide extremely high protection effect.

[0025] The preparation method of each protective layer is as follows: It includes the following steps: Material preparation: Mix the materials of each protective layer evenly in a certain proportion; Heating and melting: heating the mixed materials to a molten state for subsequent processing; Extrusion molding: The molten material is extruded through an extruder to form a protective layer with a certain thickness and width; Cooling and solidification: The extruded water-blocking buffer layer is cooled and solidified by a cooling device to form a solid protective layer; Quality inspection: Carry out quality inspection on the prepared water-blocking buffer layer to ensure that its various performance indicators meet the requirements.

[0026] 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 method for manufacturing an airtight cable for ships, characterized in that: The cable is provided with a wrapping layer, a water-blocking buffer layer, an intermediate reinforcement layer and an external protective layer in sequence outside the cable core. The cable core is twisted by multiple cores, and the gaps between the cores are filled with glass fiber filling ropes. The sheath is a protective layer wrapped around the conductor in the cable structure. It is made of insulating material and can prevent current leakage and improve the electrical performance of the cable. The water-blocking buffer layer is wrapped outside the wrapping layer and is made of water-blocking powder. It is used to prevent moisture from penetrating into the cable while providing mechanical protection and buffering effects. The middle reinforcement layer is often made of fiber, copper wire or steel wire materials, which can provide additional mechanical protection and electrical performance; The outer protective layer is made of polyvinyl chloride and polyethylene materials to protect the cable from damage by external physical, chemical and environmental factors.

2. The method for manufacturing a gas-tight cable for ships according to claim 1, characterized in that: The wrapping layer includes an inner layer, a middle layer and an outer layer; The inner layer uses plastic materials with high insulation performance, providing higher resistivity, which can effectively prevent current leakage, resist corrosion from various chemicals, extend the service life of the cable, improve tensile strength and compressive strength, and withstand greater mechanical stress; The middle layer uses a rubber material with high elasticity and flexibility, which provides elasticity, can withstand greater deformation without breaking, and provides aging resistance and flexibility; The outer layer uses a metal material with high mechanical strength and shielding properties, which provides tensile strength and compressive strength, has conductivity, can effectively shield external electromagnetic interference, and provides corrosion resistance.

3. The method for manufacturing a gas-tight cable for ships according to claim 1, characterized in that: The water-blocking buffer layer is made of water-blocking powder, plastic and rubber. The water-blocking powder expands rapidly after contacting water to form a gel-like substance to block the water seepage channel. Plastic provides insulating properties and mechanical strength; rubber provides elasticity and flexibility.

4. The method for manufacturing an airtight cable for ships according to claim 1, characterized in that: The intermediate reinforcement layer includes a fiber braided layer, a copper wire braided layer and a steel wire braided layer; The fiber braided layer is usually made of cotton yarn and linen materials, which improves the tear resistance of the cable and protects the insulation layer from erosion by various light, heat, moisture, low temperature, acid and alkali gases and damage by external mechanical forces, ensuring the reliable operation of the cable; The copper wire braided layer can provide electromagnetic shielding, prevent electromagnetic interference, eliminate the surface potential of the power cable, and play a role in binding the power lines and eliminating induced electricity; The steel wire braid layer can provide mechanical protection, prevent the cable from mechanical damage, and bear the longitudinal tensile force.

5. The method for manufacturing an airtight cable for ships according to claim 1, characterized in that: The outer protective layer includes a plastic wrapping layer, a rubber wrapping layer and a metal wrapping layer; The plastic wrapping layer is made of polyvinyl chloride, polyethylene and polypropylene, has good physical properties and chemical stability, and can provide good protection effect; The rubber wrapping layer has excellent elasticity, tensile strength, elongation, wear resistance, tear resistance and compression permanent deformation performance, and good electrical insulation; The metal wrapping layer has good mechanical properties and corrosion resistance and can provide extremely high protection effect.

6. The method for manufacturing an airtight cable for ships according to claim 1, characterized in that: The preparation methods of the above-mentioned protective layers are as follows: It includes the following steps: Material preparation: Mix the materials of each protective layer evenly in a certain proportion; Heating and melting: heating the mixed materials to a molten state for subsequent processing; Extrusion molding: The molten material is extruded through an extruder to form a protective layer with a certain thickness and width; Cooling and solidification: The extruded water-blocking buffer layer is cooled and solidified by a cooling device to form a solid protective layer; Quality inspection: Carry out quality inspection on the prepared water-blocking buffer layer to ensure that its various performance indicators meet the requirements.

7. The method for manufacturing an airtight cable for ships according to claim 1, characterized in that: The specific steps include: Manufacturing of wire core conductor: Take metal monofilament and use stranding machine to manufacture; Wrap manufacturing: extruding the wrap on the conductor and wrapping the wrap on the conductor; Water-blocking buffer layer manufacturing: wrapping the water-blocking buffer layer on the wrapping layer; Filling: twist multiple prepared wire cores and glass fiber filling ropes together to form a cable core, and use a back-twisting cabling machine for twisting; Manufacturing of the intermediate reinforcement layer: Fiber, copper wire and steel wire are used to weave the water-blocking buffer layer, with a weaving coverage rate of not less than 90%, and a weaving machine is used to manufacture the weaving layer; Outer protective layer manufacturing: A sheath is added outside the braided intermediate reinforcement layer to protect the entire cable structure.

Images