CN113936850A - Effectual fire-retardant type power cable of resistance to compression - Google Patents
Effectual fire-retardant type power cable of resistance to compression Download PDFInfo
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- CN113936850A CN113936850A CN202111235247.8A CN202111235247A CN113936850A CN 113936850 A CN113936850 A CN 113936850A CN 202111235247 A CN202111235247 A CN 202111235247A CN 113936850 A CN113936850 A CN 113936850A
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/12—Scaring or repelling devices, e.g. bird-scaring apparatus using odoriferous substances, e.g. aromas, pheromones or chemical agents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/185—Sheaths comprising internal cavities or channels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/24—Devices affording localised protection against mechanical force or pressure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
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- Engineering & Computer Science (AREA)
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- Insulated Conductors (AREA)
Abstract
The invention discloses a flame-retardant power cable with a good compression-resistant effect, which belongs to the field of power cables and comprises a cable core and an inner sheath, wherein an insulating layer is arranged outside the cable core, a shielding layer is arranged outside the insulating layer, a protective layer is arranged outside the shielding layer, a partition plate is arranged inside the inner sheath, and a filling layer is arranged inside the inner sheath; according to the invention, by arranging the buffer layer and the buffer cavity, when the outside of the power cable is extruded, the buffer layer can carry out primary buffer force unloading, the buffer cavity provides a deformation space for the power cable, the stress of the power cable when the power cable is bent or extruded can be relieved, and meanwhile, the buffer cavity has a buffer effect on the stress of the power cable and the inner sheath and provides a deformation space for the inner sheath, so that the extrusion resistance and the bending resistance of the power cable are improved, the problem that a cable core is extruded is avoided, and the signal transmission quality of the power cable is ensured.
Description
Technical Field
The invention belongs to the technical field of power cables, and particularly relates to a flame-retardant power cable with a good compression-resistant effect.
Background
The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and transmission lines under river-crossing seawater, is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system along with the gradual increase of the proportion of the cable in the power line, and has a basic structure consisting of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer; however, most of existing power cables are in the using process, due to poor anti-extrusion performance, in the field construction process, the power cables are prone to being damaged due to collision of foreign objects, and then extrusion can be conducted on the wire cores of the power cables, so that the signal transmission quality of the power cables can be affected, and due to poor flame retardant performance, when a fire disaster occurs, the power cables can burn quickly, a large amount of smoke and toxic gas are generated, people are prone to being hindered from safely evacuating and extinguishing, people's lives and properties can suffer serious losses, and therefore the flame retardant power cables with good compression resistance effects are provided.
Disclosure of Invention
The invention aims to provide a flame-retardant power cable with a good compression-resistant effect so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an effectual fire-retardant type power cable of resistance to compression, power cable includes:
the cable comprises a cable core, wherein an insulating layer is arranged outside the cable core, a shielding layer is arranged outside the insulating layer, and a protective layer is arranged outside the shielding layer;
the inner sheath, the inside of inner sheath is provided with the division board, the inside of inner sheath is provided with the filling layer, the outside of inner sheath is provided with fire-retardant layer, the outside on fire-retardant layer is provided with the buffer layer, the outside of buffer layer is provided with the oversheath.
In a preferred embodiment, the insulating layer is made of cross-linked polyethylene.
In a preferred embodiment, the shielding layer is formed by weaving a tin-plated copper wire and a steel strip.
In a preferred embodiment, the protective layer is made of an ethylene propylene diene monomer material.
As a preferred embodiment, the raw materials of the ethylene propylene diene monomer material comprise ethylene propylene diene monomer, polyvinyl chloride, phenyltrimethoxysilane, modified composite fibers, zinc stearate and an anti-aging agent.
In a preferred embodiment, the inner sheath and the outer sheath are both made of low smoke zero halogen materials, and the outer sheath is added with an ultraviolet absorbent and an ant-preventing agent.
As a preferred embodiment, the number of the partition plates is four, the four partition plates are fixedly connected through a central column, and the partition plates are made of polyvinyl chloride materials.
In a preferred embodiment, the material of the filling layer is a silicon rubber ceramic material.
In a preferred embodiment, the flame-retardant layer is made of a ceramic fiber material and a high flame-retardant glass cloth tape.
In a preferred embodiment, a buffer cavity is formed inside the buffer layer, and the buffer layer is made of ethylene propylene copolymer.
Compared with the prior art, the invention has the beneficial effects that:
the flame-retardant power cable with good compression resistance effect is provided with the buffer layer and the buffer cavity, when the outside of the power cable is extruded, the buffer layer can carry out primary buffering and force unloading, the buffer cavity provides a deformation space for the power cable, the stress when the power cable is bent or extruded can be relieved, and the buffer cavity plays a role in buffering the stress borne by the power cable and the inner sheath and provides a deformation space for the inner sheath, so that the extrusion resistance and the bending resistance of the power cable are improved, the problem that a cable core is extruded is avoided, and the signal transmission quality of the power cable is ensured;
according to the flame-retardant power cable with the good compression-resistant effect, the partition plate made of the polyvinyl chloride material is arranged, the deformation resistance of the power cable can be enhanced, the cable core is protected conveniently, the power cable is not prone to being broken, the polyvinyl chloride is an ultra-light high-temperature heat-insulating material, the flame-retardant property of the power cable can be further enhanced, the flame-retardant effect can be achieved inside and outside the power cable, and therefore the safety performance of the power cable is improved;
the flame-retardant power cable with the good compression resistance effect can preliminarily block fire when the power cable is subjected to fire, can reduce the spreading speed of the fire, can block the spreading of the fire in an intermediate stage by arranging the filling layer made of the ceramic silicon rubber material, can serve as a final checkpoint to block the fire by arranging the protective layer, avoids the problem that a cable core is damaged due to combustion, can carry out deep protection on the cable core, and accordingly improves the flame-retardant effect of the power cable;
the flame-retardant power cable with good compression resistance effect is characterized in that the inner sheath and the outer sheath of the low-smoke halogen-free material are arranged, can avoid generating larger smog and toxic gas when the power cable is in fire, is convenient for people to evacuate safely and put out a fire, thereby reducing the loss of life and property of people, and by adding the ultraviolet absorbent into the outer sheath, can absorb ultraviolet rays, when the power cable is subjected to sunlight irradiation and various meteorological conditions for a long time, the phenomena of color fading, mechanical and physical property reduction and even cracking and the like can not occur on the surface of the cable, meanwhile, the termite-proof agent is added into the outer sheath, so that when the power cable is used, the oral mucosa and olfactory nerves of the rodent can be strongly stimulated to avoid chewing, and the termite can be killed, so that the termite-proof cable has the advantages of no toxicity, environmental protection and no pollution.
Drawings
FIG. 1 is a partial perspective view of the structure of the present invention;
fig. 2 is a schematic cross-sectional view of a power cable having the structure of the present invention.
In the figure: 1. a cable core; 2. an insulating layer; 3. a shielding layer; 4. a protective layer; 5. an inner sheath; 6. a partition plate; 7. a filling layer; 8. a flame retardant layer; 9. a buffer layer; 10. an outer sheath.
Detailed Description
The present invention will be further described with reference to the following examples.
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple modifications of the method of the present invention based on the concept of the present invention are within the scope of the claimed invention.
Referring to fig. 1 and 2, the flame retardant power cable with a good compression resistance effect includes a cable core 1, an inner sheath 5 and an outer sheath 10.
The insulating layer 2 is arranged outside the cable core 1, the insulating layer 2 is made of cross-linked polyethylene, and the insulating layer 2 can be arranged in the power cable using process to enhance the insulativity of the cable core 1, so that the safety performance of the cable core 1 in use is improved.
The outside of insulating layer 2 is provided with shielding layer 3, and shielding layer 3 is woven by tinned copper wire and steel band and is formed, through the cross-woven design between tinned copper wire and the steel band, can superpose the shielding effect of two kinds of materials, is convenient for improve the magnetic permeability of cable core 1, makes cable core 1 can reach shielded effect to this power cable's interference killing feature has been strengthened.
A protective layer 4 is arranged outside the shielding layer 3, the protective layer 4 is made of an ethylene propylene diene monomer material, and the raw material of the ethylene propylene diene monomer material is composed of ethylene propylene diene monomer, polyvinyl chloride, phenyltrimethoxysilane, modified composite fiber, zinc stearate and an anti-aging agent; by adding the phenyltrimethoxysilane and the modified composite fiber into the ethylene propylene diene monomer and the polyvinyl chloride, the dispersity of the ethylene propylene diene monomer and the polyvinyl chloride can be improved, the corrosion resistance and the flame retardant property of the manufactured ethylene propylene diene monomer material can be further enhanced, the cable core 1 is protected conveniently, when a power cable is in a fire disaster, the protective layer 4 can be used as a final barrier to block the fire, the problem that the cable core 1 is damaged due to combustion is avoided, and the cable core 1 can be subjected to deep flame retardant protection.
The inner sheath 5 and the outer sheath 10 are made of low-smoke halogen-free materials, the light transmittance, the release amount of halogen acid gas, the PH value and the conductivity of the low-smoke halogen-free materials used for the inner sheath 5 and the outer sheath 10 meet the standard requirements and have large allowance, the light transmittance of the cable material and the cable smoke density test is less than sixty percent, when the power cable is subjected to fire, a large amount of smoke and dust can not be generated, so that the pollution to the environment is reduced, the outer sheath 10 is added with an ultraviolet absorbent and an ant-proof agent which can absorb ultraviolet light, when the power cable is subjected to sunlight irradiation and various meteorological conditions for a long time, the phenomena of color fading, mechanical and physical property reduction and even cracking and the like can not occur on the surface of the cable, the ant-proof agent can adopt capsaicin, when the power cable is used, the oral mucosa and olfactory nerve of the rodent can be strongly stimulated to abandon chewing cutting, simultaneously can kill termites, and has the advantages of no toxicity, environmental protection and no public nuisance.
The inside of inner sheath 5 is provided with division board 6, the quantity of division board 6 is four, and through center post fixed connection between four division boards 6, the material of division board 6 is the polyvinyl chloride material, through setting up four division boards 6, can cut apart into four independent spaces with the inner space of inner sheath 5, thereby be convenient for place four cable cores 1 that correspond, make can each other noninterference between four cable cores 1, and the division board 6 of polyvinyl chloride material can strengthen power cable's resistance to deformation, be convenient for protect cable core 1, make the difficult rupture of power cable, and polyvinyl chloride is ultralight high temperature heat-insulating material, can further strengthen power cable's flame retardant property, make power cable all reach flame retardant efficiency inside and outside, thereby improve power cable's security performance.
The inside of inner sheath 5 is provided with filling layer 7, and the material of filling layer 7 is porcelainized silicon rubber material, through the inside filling layer 7 that adds of inner sheath 5, can make in close contact with between division board 6 and the protective layer 4, has avoided taking place not hard up problem between the two, and because porcelainized silicon rubber material is novel polymer refractory material, when power cable suffered the conflagration, can block stretching of the intensity of a fire to this power cable's flame retardant property has further been strengthened.
The outside of inner sheath 5 is provided with fire-retardant layer 8, and fire-retardant layer 8 comprises ceramic fiber material and high fire-retardant glass strap, and ceramic fiber material and high fire-retardant glass strap all are refractory material, can effectually play fire-retardant effect, through the fire-retardant layer 8 of the exterior design of inner sheath 5, can be when power cable suffers the conflagration, tentatively block the intensity of a fire, can reduce the speed of stretching of intensity of a fire, thereby be convenient for carry on fire-retardantly.
The outer part of the flame-retardant layer 8 is provided with a buffer layer 9, the inner part of the buffer layer 9 is provided with a buffer cavity, the buffer layer 9 is made of ethylene propylene copolymer, the outer part of the buffer layer 9 is provided with an outer sheath 10, when the outer part of the power cable is extruded, the buffer layer 9 can primarily buffer and unload force, and the buffer cavity provides a deformation space for the power cable, so that the stress of the power cable when being bent or extruded can be relieved, meanwhile, the buffer cavity has a buffering effect on the stress of the power cable and the inner sheath 5, and provides a deformation space for the inner sheath 5, thereby increasing the extrusion resistance and bending resistance of the power cable, simultaneously, as the cross-sectional area of the ethylene propylene copolymer is very small, the power cable is not easy to crack and crack extension, the waterproof performance is achieved, the cable is prevented from thermal breakdown caused by the moisture infiltration into the gaps, the waterproof performance and the service life of the power cable are improved, and the power cable is not easy to damage due to the corrosion resistance of the ethylene-propylene copolymer, so that the service life and the safety performance of the power cable are improved.
The working principle and the using process of the invention are as follows: firstly, an ultraviolet absorbent is added into an outer sheath 10, so that ultraviolet light can be absorbed, when the power cable is subjected to sunlight irradiation and various meteorological conditions for a long time, the phenomena of color fading, mechanical and physical performance reduction and even cracking and the like can not occur on the surface of the cable, an ant-preventing agent is added into the outer sheath 10, the ant-preventing agent can adopt capsaicin, when the power cable is used, oral mucosa and olfactory nerves of a rat animal can be strongly stimulated to repel and chew, and simultaneously termites can be killed, so that the advantages of no toxicity, environmental protection and no public nuisance are achieved;
then when the power cable is in a fire disaster, the inner sheath 5 and the outer sheath 10 made of the low-smoke halogen-free materials can avoid generating larger smoke and toxic gas, and people can evacuate safely and extinguish the fire conveniently, so that the loss of lives and properties of people is reduced, meanwhile, the flame-retardant layer 8 can primarily block the fire, the spreading speed of the fire can be reduced, the filling layer 7 made of the ceramic silicon rubber material can block the spreading of the fire in the middle stage, the protective layer 4 can serve as a final barrier to block the fire, the problem that the cable core 1 is damaged due to burning is avoided, the cable core 1 can be deeply protected, and the flame-retardant effect of the power cable is improved;
when the outside of the power cable is extruded, the buffer layer 9 can primarily buffer and unload force, the buffer cavity provides a deformation space for the power cable, the stress when the power cable is bent or extruded can be relieved, meanwhile, the buffer cavity has a buffer effect on the power cable and the stress borne by the inner sheath 5, and provides a deformation space for the inner sheath 5, so that the extrusion resistance and the bending resistance of the power cable are improved, meanwhile, the partition plate 6 made of polyvinyl chloride material can strengthen the deformation resistance of the power cable, the cable core 1 is convenient to protect, the power cable is not easy to break, the problem that the cable core 1 is extruded is avoided, and the signal transmission quality of the power cable is ensured;
at last, through setting up insulating layer 2, can strengthen the insulating nature of cable core 1 at the in-process that power cable used to improve the security performance when cable core 1 used, shielding layer 3 can superpose the shielding effect of two kinds of materials through the cross-woven design between tinned copper wire and the steel band, is convenient for improve the magnetic permeability of cable core 1, makes cable core 1 can reach the effect of shielding, thereby has strengthened this power cable's interference killing feature.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an effectual fire-retardant type power cable of resistance to compression which characterized in that: the power cable includes:
the cable comprises a cable core (1), wherein an insulating layer (2) is arranged outside the cable core (1), a shielding layer (3) is arranged outside the insulating layer (2), and a protective layer (4) is arranged outside the shielding layer (3);
inner sheath (5), the inside of inner sheath (5) is provided with division board (6), the inside of inner sheath (5) is provided with filling layer (7), the outside of inner sheath (5) is provided with fire-retardant layer (8), the outside on fire-retardant layer (8) is provided with buffer layer (9), the outside of buffer layer (9) is provided with oversheath (10).
2. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the insulating layer (2) is made of cross-linked polyethylene.
3. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the shielding layer (3) is formed by weaving tinned copper wires and steel bands.
4. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the protective layer (4) is made of ethylene propylene diene monomer rubber material.
5. The flame-retardant power cable with good compression resistance effect according to claim 4, characterized in that: the raw materials of the ethylene propylene diene monomer material comprise ethylene propylene diene monomer, polyvinyl chloride, phenyl trimethoxy silane, modified composite fiber, zinc stearate and an anti-aging agent.
6. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the inner sheath (5) and the outer sheath (10) are both made of low-smoke halogen-free materials, and an ultraviolet absorbent and an ant-preventing agent are added into the outer sheath (10).
7. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the number of the partition plates (6) is four, the four partition plates (6) are fixedly connected through a central column, and the partition plates (6) are made of polyvinyl chloride materials.
8. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the filling layer (7) is made of a ceramic silicon rubber material.
9. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: the flame-retardant layer (8) is made of ceramic fiber materials and high-flame-retardant glass cloth belts.
10. The flame-retardant power cable with good compression resistance effect according to claim 1, characterized in that: a buffer cavity is formed in the buffer layer (9), and the buffer layer (9) is made of ethylene-propylene copolymer.
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| CN202111235247.8A CN113936850A (en) | 2021-10-22 | 2021-10-22 | Effectual fire-retardant type power cable of resistance to compression |
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