CN111341489A

CN111341489A - Cable and method for manufacturing cable

Info

Publication number: CN111341489A
Application number: CN202010154182.3A
Authority: CN
Inventors: 张宏涛; 孙文
Original assignee: Individual
Current assignee: Jintai Cable Co ltd
Priority date: 2020-03-07
Filing date: 2020-03-07
Publication date: 2020-06-26
Anticipated expiration: 2040-03-07
Also published as: CN111341489B

Abstract

The invention belongs to the technical field of power equipment, in particular to a cable and a method for manufacturing the same, wherein the cable comprises a metal conductor, an insulating layer and a film layer; the metal conductor is formed by twisting metal monofilaments; the insulating layer is wrapped on the surface of the metal conductor; the thin film layer is coated outside the metal conductors wrapped by the insulating layers; the outer side of the thin film layer is sleeved with a water stopping layer; the waterproof layer is made of a water-swellable rubber material; the outer side of the water stop layer is sleeved with an outer protective sleeve; talcum powder is filled between the film layer and the water stop layer; the inner wall of the water stopping layer is provided with negative pressure cavities which are uniformly distributed; the catheters are uniformly distributed between the two adjacent negative pressure cavities; the negative pressure cavity is fixedly connected with a water outlet pipe; the water outlet pipe penetrates through the outer layer protective sleeve; the invention prepares n-nonanoic acid vanillimide into solid particles which are uniformly put into the outer sheath tube, and then the solid particles are gasified to form uniform bubbles in the outer sheath tube, thereby achieving the purpose of rat prevention.

Description

Cable and method for manufacturing cable

Technical Field

The invention belongs to the technical field of power equipment, and particularly relates to a cable and a method for manufacturing the cable.

Background

Cables are generally rope-like cables made by stranding several or groups of conductors, at least two in each group, each group being insulated from each other and often twisted around a center, the entire outer surface being covered with a highly insulating covering. The cable is erected in the air or installed underground or underwater for telecommunication or power transmission, most of the erection fields of the cable often have mice, and the cable has special attraction to the mice, so that the mice often bite the cable, the cable is short-circuited and leaked, and in serious cases, the cable is broken, and potential safety hazards such as fire are caused; in the prior art, steel tape armoring is added on the outer layer of a cable, but the steel tape armoring is easy to rust in a humid environment, and the cable provided with the steel tape armoring is heavy.

A chinese patent rat-proof data cable, patent number 201610361914, comprising: the cable core comprises a foaming framework and a conductor core group, the foaming framework comprises four limiting convex strips, the conductor core group is arranged in the installation cavity, the conductor core group comprises a pair of wires which are arranged in parallel, and the outer sides of the pair of wires are wrapped with an isolation layer; the outer contour of the cross section of the insulating layer is in a regular hexagon shape, a rat-proof coating film is sprayed on the edge of the insulating layer, the rat-proof coating film formula comprises capsaicin, and the six outer side faces of the insulating layer are provided with adhesive layers. According to the invention, the cable inner core, the fire-resistant layer and the regular hexagonal insulating layer are arranged, and the edge of the insulating layer is coated with the rat-proof coating film.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that the sheath of the cable is easy to be damaged by mice and the existing rat-proof cable can cause damage to human bodies when being installed and influence the installation progress of the cable, the invention provides the cable and the method for manufacturing the cable.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cable comprising an outer jacket tube; the outer sheath pipe is prepared from the following raw materials:

85-90 parts by weight of polyolefin; 5-8 parts of glass fiber yarns; 6-10 parts by weight of clay; 0.6-1 part by weight of a silane coupling agent; 1.5-2 parts by weight of stearic acid; 0.35-0.8 part by weight of n-nonanoic acid vanillimide; 5-6 parts by weight of calcium acetate; 10-12 parts by weight of alcohol; 3-5 parts of gum; 10-12 parts by weight of deionized water;

the polyolefin is an ethylene-1-octene copolymer; the ethylene-1-octene copolymer is an ethylene copolymer containing a small amount of octene, and has the outstanding characteristics of soft performance, good toughness, high bonding strength, strong tensile strength and tearing strength of a film, puncture resistance, good heat sealability and the like, so that the ethylene-1-octene copolymer is widely applied to the manufacture of an outer-layer protective sleeve, and simultaneously, glass fiber yarns selected from raw materials are used as filamentous materials with extremely good toughness and added into the raw materials, so that the toughness of the outer-layer protective sleeve can be effectively enhanced, the tearing resistance of the outer-layer protective sleeve is improved, the biting damage of decayed animals to cables is effectively reduced, meanwhile, the inorganic clay added into the raw materials is matched, the viscosity of an ethylene-1-octene copolymer substrate is enhanced, the hardness is enhanced, and the damage of rats and ants to the cables is effectively reduced by matching with the glass fiber yarns;

n-nonanoic acid vanillylamide selected from raw materials is used as an artificial synthetic capsaicin, the n-nonanoic acid vanillylamide has a molecular structure similar to that of a natural capsaicin compound and biological properties similar to that of a natural capsaicin compound, compared with natural extracted vanillylnonanamide, the n-nonanoic acid vanillylamide has wide acquisition ways and low acquisition cost, and the biological properties of the n-nonanoic acid vanillylamide can be effectively utilized when the n-nonanoic acid vanillylamide is added into raw materials for manufacturing an outer-layer protective sleeve, so that the n-nonanoic acid vanillylamide has a good expelling effect on mice and ants, the cables can be effectively prevented from being damaged by the mice and the ants, and meanwhile, alcohol selected from the raw materials has good volatile properties, and can effectively assist the odor diffusion of the n-nonanoic acid vanillylamide;

stearic acid selected from the raw materials is used as a PVC heat stabilizer, has good lubricity and good light and heat stabilizing effects, is an effective heat stabilizer, and can prevent finished product discoloration caused by exposure to sulfides;

the gum is Arabic gum which is a safe and harmless thickening agent and has excellent viscosity and softness, and the components can be combined more tightly by virtue of the excellent viscosity of the Arabic gum added into the raw materials, so that the toughness of the outer-layer protective sleeve is effectively enhanced.

Preferably, the raw materials also comprise calcium oxide powder; the particle size of the calcium oxide powder is controlled to be 300-350 meshes; calcium oxide powder is used as a solid powdery material which can quickly absorb moisture and carbon dioxide in the air to generate calcium carbonate solid when being exposed in the air, the calcium oxide powder is added into the raw material, when the surface of the outer protective sleeve is damaged, the calcium carbonate solid can be formed at the damaged part of the outer protective sleeve by utilizing the property of converting the calcium oxide powder into the calcium carbonate, because the calcium carbonate is almost insoluble in water and has higher hardness, the damaged part of the outer protective sleeve can be effectively prevented from being affected by water vapor, air corrosion and aging, so that the damaged opening is gradually enlarged at any time, meanwhile, the odor of the n-nonanoic vanillylamide on the surface layer of the cable is reduced, so that the calcium oxide at the damaged part of the cable is heated in the process of converting the calcium carbonate when being damaged by rats and ants, the diffusion speed of alcohol and the n-nonanoic vanillylamide can be effectively accelerated, and the expelling effect, the cable is prevented from being damaged too seriously, and the calcium oxide enables the Arabic gum near the calcium oxide to be dissolved when releasing heat, so that the cable is sealed at the damaged part by matching with the generated calcium carbonate, and the influence of external factors such as water vapor on the cable is relieved.

Preferably, the inner part of the outer sheath pipe is fixedly connected with a metal fiber net; the metal fiber net is a net woven by using metal fiber wires modified by hydroxyl iron powder; the modified metal fiber wire of via hydroxyl iron powder has good electromagnetic wave absorption performance, it is netted arranging inside outer sheath pipe to deteriorate into, can make outer sheath dry the broken shielding effect reinforcing of electromagnetism effectively, simultaneously because hydroxyl iron powder density is great itself, place moisture and the oxygen in the air of easy absorption in the air, arrange inside outer sheath pipe with it, can slow down the inside slow oxidation of steam to outer sheath pipe effectively, metal fiber wire toughness is stronger simultaneously, can strengthen the compressive capacity of outer sheath pipe itself.

Preferably, the preparation method of the outer sheath pipe comprises the following steps:

s1: sequentially adding calcium acetate and deionized water into an evaporation dish, continuously heating the evaporation dish to raise the temperature in the evaporation dish to 60-65 ℃, preserving heat, heating for 10min, filtering, slowly adding a mixture of alcohol and n-nonanoic vanillylamide into the filtered calcium acetate saturated solution, and continuously stirring the solution; dissolving calcium acetate in deionized water under a heating condition, regulating the proportion of the calcium acetate to water to enable the calcium acetate aqueous solution to be in a saturated state, then adding a mixed solution of alcohol and n-nonanoic vanilloylamine into the calcium acetate aqueous solution, and gradually solidifying the mixed solution after cooling treatment, wherein the n-nonanoic vanilloylamine in the solid alcohol is uniformly dispersed and has no property change because the n-nonanoic vanilloylamine is not reacted with the alcohol and the calcium acetate;

s2: naturally cooling the mixed solution of the mixture of the alcohol and n-nonanoic vanilloylamine in the S1 to obtain a solid mixture, and cutting and granulating the solid mixture to obtain granules;

s3: introducing the ethylene-1-octene copolymer, glass fiber yarns, clay and stearic acid into a thermoplastic box, controlling the rotating speed of the thermoplastic box to be 800-1200 r/min, continuously stirring for 10min, then starting heating, heating to 170-190 ℃, then keeping the temperature and stirring for 15-20 min to obtain a molten mixture; the raw materials are stirred and mixed firstly, and then are heated to be molten, so that the raw materials can be effectively mixed uniformly in solid powder, and the problem that the local difference of the raw materials is large due to the fact that the ethylene-1-octene copolymer in a molten state is high in viscosity and the components are mixed unevenly is avoided.

S4: sequentially adding a silane coupling agent and gum into the molten mixture, continuously stirring for 11-15 min, adding the granular material into the mixture, directly coating the granular material on two sides of the metal fiber net, and cooling to obtain an outer-layer protective sleeve; adding the granular materials into the mixture, directly melting, evaporating and gasifying the granular materials in the mixture due to higher temperature of the mixture, forming bubbles in the mixture by the gasified granular materials due to stronger viscosity of the mixture, controlling the feeding of the granular materials to form the uniformly distributed bubbles in the cooled outer sheath tube, absorbing water vapor in the granular materials by clay and the like in the raw materials when the granular materials volatilize, only forming a mixture of absolute ethyl alcohol and n-nonanoic vanilloylamine in the cooled bubbles, and quickly diffusing the absolute ethyl alcohol and the n-nonanoic vanillylamide when the bubbles are destroyed.

Preferably, the composite material further comprises a metal conductor, an insulating layer and a thin film layer; the metal conductor is formed by twisting single wires of aluminum and copper metals; the insulating layer is wrapped on the surface of the metal conductor; the thin film layer is coated outside the metal conductors wrapped by the insulating layers; the outer side of the thin film layer is sleeved with a water stopping layer; the waterproof layer is made of a water-swellable rubber material; the outer side of the water stop layer is sleeved with an outer protective sleeve; talcum powder is filled between the film layer and the water stop layer; the inner wall of the water stopping layer is provided with negative pressure cavities which are uniformly distributed; the catheters are uniformly distributed between the two adjacent negative pressure cavities; the negative pressure cavity is fixedly connected with a water outlet pipe; the water outlet pipe penetrates through the outer layer protective sleeve; one end of the water outlet pipe, which is positioned outside the outer layer protective sleeve, is in threaded connection with a sealing cover; the inner wall of the negative pressure cavity is fixedly connected with a one-way permeable membrane; when the cable works, the outer sheath pipe is positioned at the outermost layer of the cable, when the outer sheath pipe is damaged by mice, ants and the like, the internal n-nonanoic vanilloylamine expels the water, as time goes on, the water vapor in the air gradually permeates into the outer sheath pipe, when the water vapor crosses the outer sheath pipe and enters the water stop pipe, as the water stop pipe is made of water-absorbing expansion rubber material, the water stop pipe absorbing the water vapor expands, the expanded water stop pipe generates pressure to the inside and the outside, as the expansion performance of the outer sheath pipe is lower, the water stop pipe generates larger extrusion force to the inside, the talcum powder edge filled inside is tighter, the interception effect of the talcum powder is effectively enhanced, the water vapor is prevented from entering the insulating layer, the performance of the insulating layer is reduced, and meanwhile, the water stop pipe expands to expand the pipe inside, so that the water vapor pipe is attracted by the negative pressure, thereby get into the negative pressure intracavity to the completion is to the collection of invasion steam, avoids steam to cause the damage to the cable is inside.

Preferably, the sealing cover is made of transparent material; a humidity test card is adhered to one side of the sealing cover, which is close to the water outlet pipe; the outer layer protective sleeve is positioned between the two sealing covers and sleeved with a protective sleeve; the protective sleeve is used for increasing the diameter of the cable when the cable is laid, so that the effect of protecting the sealing cover is achieved; during operation, when the water vapor density in the negative pressure cavity gradually rises, the water vapor contacts the humidity test card along the water outlet pipe, and the humidity test card absorbs the water vapor to change color.

A method of manufacturing a cable, the method being suitable for use with any of the above cables, the method comprising the steps of:

a1, drawing: the method comprises the following steps of (1) passing a copper metal rod and an aluminum metal rod through one or more die holes of a drawing die by a wire drawing machine at normal temperature to reduce the section of the metal rod, increase the length of the metal rod and improve the strength of the metal rod, and then heating the metal rod to a certain temperature for crystallization under the protection of inert gas in an induction heating mode to obtain metal monofilaments; the mechanical strength of the metal conductor can be effectively enhanced by stretching the copper and aluminum metal rods at normal temperature, and the temperature is accurately controlled by using an induction heating mode after stretching, so that the flexibility of the metal monofilament is improved;

a2, hinging: twisting a plurality of metal monofilaments with each other, and pressing the metal monofilaments while twisting to tightly combine the plurality of metal monofilaments so as to obtain a metal conductor; the metal conductor prepared by twisting a plurality of metal monofilaments can effectively reduce the heat loss of the metal conductor when the metal conductor is electrified and can also effectively enhance the toughness of the metal conductor;

a3, insulating coating: heating and melting the insulating material in the extruder in a pressurized mode, extruding and coating the insulating material on a metal conductor to obtain an insulating wire core, and introducing the insulating wire core into a vulcanizing tube to enable the insulating wire core to perform vulcanization reaction with peroxide in the vulcanizing tube at high temperature and high pressure;

a4, plastic coating: the vulcanized cable is uniformly wound on a thin film layer and then sleeved in the water stop pipe to pass through a plastic coating machine, molten materials in the plastic coating machine are uniformly coated on the outer layer of the water stop pipe to form an outer protective sleeve after cooling, and after the cable completely passes through a cooling device, protective paint is coated on the surface of the cooled outer protective sleeve to obtain a finished cable.

The invention has the following beneficial effects:

1. according to the cable and the method for manufacturing the cable, n-nonanoic vanillylamide is mixed with alcohol, then the mixture is added into a heated saturated calcium acetate solution, the solid mixture is manufactured by utilizing the characteristic that the alcohol is dissolved in the calcium acetate solution and is solidified after being cooled, then the solid mixture is uniformly added into an outer-layer protective sleeve raw material of a melting table, and uniformly distributed bubbles are manufactured in the molten raw material by utilizing the characteristics of evaporation and gasification of the solid mixture, so that the problem that the n-nonanoic vanillylamide is directly added into a substrate to cause troubles to the cable installation work is avoided.

2. According to the cable and the method for manufacturing the cable, calcium oxide is added into the raw materials, and the characteristic that the calcium oxide can absorb water and carbon dioxide to produce calcium carbonate when exposed in the air is utilized, so that the phenomenon that after the cable is damaged, water vapor and the like penetrate into the cable through a damaged opening to accelerate the aging rate of the cable and influence the service life of the cable can be effectively prevented.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a flow chart of a method of making an outer sheath tube;

FIG. 2 is a flow chart of a method of manufacturing a cable;

FIG. 3 is a front view of the cable;

FIG. 4 is a cross-sectional view of a cable;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 3;

in the figure: the cable comprises an outer-layer protective sleeve 1, a metal conductor 2, an insulating layer 3, a thin film layer 4, a waterproof layer 5, a negative pressure cavity 51, a water outlet pipe 52, a sealing cover 53 and a protective sleeve 54.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, a cable according to the present invention includes an outer sheath tube 1; the outer sheath pipe 1 is prepared from the following raw materials:

the polyolefin is an ethylene-1-octene copolymer; the ethylene-1-octene copolymer is an ethylene copolymer containing a small amount of octene, and has the outstanding characteristics of soft performance, good toughness, high bonding strength, strong tensile strength and tearing strength of a film, puncture resistance, good heat sealability and the like, so that the ethylene-1-octene copolymer is widely applied to the manufacture of the outer-layer protective sleeve 1, and simultaneously, glass fiber yarns selected from raw materials are used as filamentous materials with extremely good toughness and added into the raw materials, so that the toughness of the outer-layer protective sleeve 1 can be effectively enhanced, the tearing resistance of the outer-layer protective sleeve 1 is improved, the biting damage of decayed animals to cables is effectively reduced, and simultaneously, inorganic clay added into the raw materials is matched to enhance the viscosity and the hardness of an ethylene-1-octene copolymer substrate, so that the damage of mice and ants to the cables is effectively reduced by matching with the glass fiber yarns;

n-nonanoic acid vanillylamide selected from raw materials is used as an artificial synthetic capsaicin, the n-nonanoic acid vanillylamide has a molecular structure similar to that of a natural capsaicin compound and biological properties similar to that of a natural capsaicin compound, compared with natural extracted vanillylnonanamide, the n-nonanoic acid vanillylamide has wide acquisition ways and low acquisition cost, and the n-nonanoic acid vanillylamide is added into the raw materials for manufacturing the outer-layer protective sleeve 1, can effectively utilize the biological properties of the n-nonanoic acid vanillylamide, has an excellent expelling effect on mice and ants, can effectively avoid the damage of the mice and the ants to cables, has excellent volatile properties, and can effectively assist the odor diffusion of the n-nonanoic acid vanillylamide, so that the stimulation effect of the cables to the mice and the ants is enhanced, and the cables are prevented;

the gum is Arabic gum which is a safe and harmless thickening agent and has excellent viscosity and softness, and the components can be combined more tightly by virtue of the excellent viscosity of the Arabic gum added into the raw materials, so that the toughness of the outer protective sleeve 1 is effectively enhanced.

As an embodiment of the invention, the raw material also comprises calcium oxide powder; the particle size of the calcium oxide powder is controlled to be 300-350 meshes; calcium oxide powder is used as a solid powdery material which can quickly absorb moisture and carbon dioxide in the air to generate calcium carbonate solid when being exposed in the air, the calcium carbonate solid is added into the raw material, when the surface of the outer protective sleeve 1 is damaged, the calcium carbonate solid can be formed at the damaged part of the outer protective sleeve 1 by utilizing the property of being converted into calcium carbonate, because the calcium carbonate is almost insoluble in water and has higher hardness, the damaged part of the outer protective sleeve 1 can be effectively prevented from being affected by water vapor, air corrosion and aging, so that the damaged opening is gradually enlarged at any time, meanwhile, the flavor of the n-nonanoic vanillimide on the surface layer of the cable is reduced, so that the calcium oxide at the damaged part of the cable is heated in the process of being converted into calcium carbonate when the cable is damaged by rats and ants, the diffusion speed of alcohol and the n-nonanoic vanillimide can be effectively accelerated, and the expelling effect on the, the cable is prevented from being damaged too seriously, and the calcium oxide enables the Arabic gum near the calcium oxide to be dissolved when releasing heat, so that the cable is sealed at the damaged part by matching with the generated calcium carbonate, and the influence of external factors such as water vapor on the cable is relieved.

As an embodiment of the invention, a metal fiber net is fixedly connected inside the outer sheath tube 1; the metal fiber net is a net woven by using metal fiber wires modified by hydroxyl iron powder; the modified metal fiber wire of via hydroxyl iron powder has good electromagnetic wave absorption performance, it becomes netted arranging inside outer protecting pipe 1 to deteriorate it, can make outer sheath do the shielding effect reinforcing to the electromagnetism is broken effectively, simultaneously because hydroxyl iron powder density is great itself, place moisture and oxygen in the air of easy absorption in the air, arrange it inside outer protecting pipe 1, can slow down the inside slow oxidation of steam to outer protecting pipe 1 effectively, metal fiber wire toughness is stronger itself simultaneously, can strengthen the compressive capacity of outer protecting pipe 1 itself.

As an embodiment of the present invention, the outer sheath tube 1 is prepared as follows:

S4: sequentially adding a silane coupling agent and gum into the molten mixture, continuously stirring for 11-15 min, adding the granular material into the mixture, directly coating the granular material on two sides of the metal fiber net, and cooling to obtain an outer-layer protective sleeve 1; the method comprises the steps of adding a granular material into a mixture, directly melting, evaporating and gasifying the granular material in the mixture due to high temperature of the mixture, forming bubbles in the mixture by the gasified granular material due to high viscosity of the mixture, controlling feeding of the granular material to enable the cooled outer-layer protective sleeve 1 to form uniformly distributed bubbles, absorbing water vapor in the granular material by clay and the like in raw materials when the granular material volatilizes, only forming a mixture of absolute ethyl alcohol and n-nonanoic vanilloylamine in the cooled bubbles, and enabling the absolute ethyl alcohol and the n-nonanoic vanilloamide to quickly diffuse when the bubbles are destroyed.

As an embodiment of the present invention, the present invention further includes a metal conductor 2, an insulating layer 3, and a thin film layer 4; the metal conductor 2 is formed by twisting single wires of aluminum and copper metals; the insulating layer 3 is wrapped on the surface of the metal conductor 2; the thin film layer 4 is coated outside the metal conductors 2 coated by the insulating layers 3; a waterproof layer 5 is sleeved on the outer side of the thin film layer 4; the waterproof layer 5 is made of a water-swellable rubber material; the outer layer protective sleeve 1 is sleeved outside the water stopping layer 5; talcum powder is filled between the film layer 4 and the water stop layer 5; the inner wall of the water stopping layer 5 is provided with uniformly distributed negative pressure cavities 51; the conduits which are uniformly arranged are distributed between two adjacent negative pressure cavities 51; a water outlet pipe 52 is fixedly connected to the negative pressure cavity 51; the water outlet pipe 52 penetrates through the outer layer protective sleeve 1; one end of the water outlet pipe 52, which is positioned at the outer side of the outer-layer protecting sleeve 1, is in threaded connection with a sealing cover 53; the inner wall of the negative pressure cavity 51 is fixedly connected with a one-way permeable membrane; when the cable works, the outer sheath pipe 1 is positioned at the outermost layer of the cable, when the outer sheath pipe 1 is damaged by rats, ants and the like, the internal n-nonanoic oxalamide expels the water, as time goes on, water vapor in the air gradually permeates into the outer sheath pipe 1, when the water vapor crosses the outer sheath pipe 1 and enters the water stop pipe, as the water stop pipe is made of water-absorbing expansion rubber material, the water stop pipe absorbing the water vapor expands, the expanded water stop pipe generates pressure to the inside and the outside, as the expansibility of the outer sheath pipe 1 is lower, the water stop pipe generates larger extrusion force to the inside, the talcum powder edge filled inside is more compact, the interception effect of the talcum powder is effectively enhanced, the water vapor is prevented from entering the insulating layer 3, the performance of the insulating layer 3 is reduced, and meanwhile, the water stop pipe expands to expand the conduit inside the water stop pipe, so that the water vapor is absorbed by the negative pressure cavity, thereby entering the negative pressure cavity 51 to complete the collection of the invading water vapor and avoid the water vapor from damaging the inside of the cable.

As an embodiment of the present invention, the sealing cover 53 is made of a transparent material; a humidity test card is adhered to one side of the sealing cover 53 close to the water outlet pipe 52; the outer-layer protecting sleeve 1 is positioned between the two sealing covers 53 and is sleeved with a protecting sleeve 54; the protective sleeve 54 is used for increasing the diameter of the cable when the cable is laid, so that the function of protecting the sealing cover 53 is achieved; during operation, when the water vapor density in the negative pressure cavity 51 gradually rises, the water vapor contacts the humidity test card along the water outlet pipe 52, and the humidity test card absorbs the water vapor to change color.

a1, drawing: the method comprises the following steps of (1) passing a copper metal rod and an aluminum metal rod through one or more die holes of a drawing die by a wire drawing machine at normal temperature to reduce the section of the metal rod, increase the length of the metal rod and improve the strength of the metal rod, and then heating the metal rod to a certain temperature for crystallization under the protection of inert gas in an induction heating mode to obtain metal monofilaments; the mechanical strength of the metal conductor 2 can be effectively enhanced by stretching the copper and aluminum metal rods at normal temperature, and the temperature can be accurately controlled by using an induction heating mode after stretching, so that the flexibility of the metal monofilament is improved;

a2, hinging: twisting a plurality of metal monofilaments with each other, and pressing the metal monofilaments while twisting to tightly combine the plurality of metal monofilaments, thereby obtaining a metal conductor 2; the metal conductor 2 is prepared by twisting a plurality of metal monofilaments, so that the heat loss of the metal conductor 2 during power-on can be effectively reduced, and meanwhile, the toughness of the metal conductor 2 can be effectively enhanced;

a3, insulating coating: heating and melting the insulating material in the extruder in a pressurized mode, extruding and coating the insulating material on the metal conductor 2 to obtain an insulating wire core, and introducing the insulating wire core into a vulcanizing tube to enable the insulating wire core to perform vulcanization reaction with peroxide in the vulcanizing tube with high temperature and high pressure;

a4, plastic coating: the vulcanized cable is uniformly wound on the thin film layer 4 and then sleeved in the water stop pipe and then passes through a plastic coating machine, molten materials in the plastic coating machine are uniformly coated on the outer layer of the water stop pipe to form an outer protective sleeve 1 after cooling, and after the cable completely passes through a cooling device, protective paint is coated on the surface of the cooled outer protective sleeve 1 to obtain a finished cable.

The specific working process is as follows:

when the cable works, the outer sheath pipe 1 is positioned at the outermost layer of the cable, when the outer sheath pipe 1 is damaged by rats, ants and the like, the internal n-nonanoic oxalamide expels the water, as time goes on, water vapor in the air gradually permeates into the outer sheath pipe 1, when the water vapor crosses the outer sheath pipe 1 and enters the water stop pipe, as the water stop pipe is made of water-absorbing expansion rubber material, the water stop pipe absorbing the water vapor expands, the expanded water stop pipe generates pressure to the inside and the outside, as the expansibility of the outer sheath pipe 1 is lower, the water stop pipe generates larger extrusion force to the inside, the talcum powder edge filled inside is more compact, the interception effect of the talcum powder is effectively enhanced, the water vapor is prevented from entering the insulating layer 3, the performance of the insulating layer 3 is reduced, and meanwhile, the water stop pipe expands to expand the conduit inside the water stop pipe, so that the water vapor is absorbed by the negative pressure cavity, thereby get into negative pressure chamber 51 in to the completion is to the collection of invasion steam, when steam density rose gradually in negative pressure chamber 51, steam is along outlet pipe 52 contact humidity test card, thereby the humidity test card absorbs steam and discolours, because the sealing plug is transparent design, when the staff overhauld, can confirm damaged position fast, avoids damaged less, difficult discovery.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A cable comprising an outer sheath tube (1); the method is characterized in that: the outer-layer protective sleeve (1) is prepared from the following raw materials:

the polyolefin is an ethylene-1-octene copolymer;

the gum is gum arabic.

2. A cable according to claim 1, wherein: wherein the raw material also comprises calcium oxide powder; the particle size of the calcium oxide powder is controlled to be 300-350 meshes.

3. A cable according to claim 1, wherein: a metal fiber net is fixedly connected inside the outer protective sleeve (1); the metal fiber net is a net woven by using metal fiber wires modified by hydroxyl iron powder.

4. A cable according to claim 1, wherein: the preparation method of the outer sheath pipe (1) comprises the following steps:

s1: sequentially adding calcium acetate and deionized water into an evaporation dish, continuously heating the evaporation dish to raise the temperature in the evaporation dish to 60-65 ℃, preserving heat, heating for 10min, filtering, slowly adding a mixture of alcohol and n-nonanoic vanillylamide into the filtered calcium acetate saturated solution, and continuously stirring the solution;

s3: introducing the ethylene-1-octene copolymer, glass fiber yarns, clay and stearic acid into a thermoplastic box, controlling the rotating speed of the thermoplastic box to be 800-1200 r/min, continuously stirring for 10min, then starting heating, heating to 170-190 ℃, then keeping the temperature and stirring for 15-20 min to obtain a molten mixture;

s4: and (3) sequentially adding a silane coupling agent and gum into the molten mixture, continuously stirring for 11-15 min, adding the granular material into the mixture, directly coating the granular material on two sides of the metal fiber net, and cooling to obtain the outer-layer protective sleeve (1).

5. A cable according to claim 1, wherein: the metal conductor (2), the insulating layer (3) and the thin film layer (4) are also included; the metal conductor (2) is formed by twisting aluminum and copper metal monofilaments; the insulating layer (3) is wrapped on the surface of the metal conductor (2); the thin film layer (4) is coated on the outer side of the metal conductor (2) coated by the insulating layers (3); a waterproof layer (5) is sleeved on the outer side of the thin film layer (4); the waterproof layer (5) is made of a water-swelling rubber material; the outer layer protective sleeve (1) is sleeved on the outer side of the water stopping layer (5); talcum powder is filled between the film layer (4) and the water stopping layer (5); the inner wall of the water stopping layer (5) is provided with uniformly distributed negative pressure cavities (51); air guide pipes which are uniformly arranged are distributed between every two adjacent negative pressure cavities (51); a water outlet pipe (52) is fixedly connected to the negative pressure cavity (51); the water outlet pipe (52) penetrates through the outer layer protective sleeve (1); one end of the water outlet pipe (52) positioned at the outer side of the outer layer protecting sleeve (1) is in threaded connection with a sealing cover (53); the inner wall of the negative pressure cavity (51) is fixedly connected with a one-way permeable membrane.

6. A cable according to claim 1, wherein: the sealing cover (53) is made of transparent material; a humidity test card is adhered to one side of the sealing cover (53) close to the water outlet pipe (52); the outer-layer protective sleeve (1) is positioned between the two sealing covers (53) and is sleeved with a protective sleeve (54); the protective sleeve (54) is used for increasing the diameter of the cable when the cable is laid, so that the effect of protecting the sealing cover (53) is achieved.

7. A method of manufacturing a cable, comprising: the method is applied to a cable according to any one of claims 1 to 6, comprising the steps of:

a1, drawing: the method comprises the following steps of (1) passing a copper metal rod and an aluminum metal rod through one or more die holes of a drawing die by a wire drawing machine at normal temperature to reduce the section of the metal rod, increase the length of the metal rod and improve the strength of the metal rod, and then heating the metal rod to a certain temperature for crystallization under the protection of inert gas in an induction heating mode to obtain metal monofilaments;

a2, hinging: stranding a plurality of metal monofilaments mutually, and pressing the metal monofilaments in a pressing mode while stranding so that the plurality of metal monofilaments are tightly combined, thereby obtaining a metal conductor (2);

a3, insulating coating: heating and melting the insulating material in the extruder in a pressurized mode, extruding and coating the insulating material on the metal conductor (2) to obtain an insulating wire core, and introducing the insulating wire core into a vulcanization pipe to enable the insulating wire core to perform vulcanization reaction with peroxide in the vulcanization pipe at high temperature and high pressure;

a4, plastic coating: the vulcanized cable is uniformly wound on a thin film layer (4) and then sleeved in the water stop pipe to pass through a plastic coating machine, molten materials in the plastic coating machine are uniformly coated on the outer layer of the water stop pipe to form an outer protective sleeve (1) after cooling, and after the cable completely passes through a cooling device, protective paint is coated on the surface of the cooled outer protective sleeve (1) to obtain a finished cable.