CN114530285A - Mineral fireproof power line - Google Patents

Mineral fireproof power line Download PDF

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Publication number
CN114530285A
CN114530285A CN202210084358.1A CN202210084358A CN114530285A CN 114530285 A CN114530285 A CN 114530285A CN 202210084358 A CN202210084358 A CN 202210084358A CN 114530285 A CN114530285 A CN 114530285A
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China
Prior art keywords
conductors
mineral
insulating
power cord
accommodating
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CN202210084358.1A
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Chinese (zh)
Inventor
聂寨远
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Huizhou Kaisheng Wire And Cable Co ltd
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Huizhou Kaisheng Wire And Cable Co ltd
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Priority to CN202210084358.1A priority Critical patent/CN114530285A/en
Publication of CN114530285A publication Critical patent/CN114530285A/en
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • 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
    • H01B7/02—Disposition of insulation
    • 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
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • 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
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention discloses a mineral fireproof power line, which comprises: the cable comprises a plurality of conductors, insulating layers, insulating supports, inorganic mineral substance filling structures, wrapping belts and an outer sheath; the insulating layers are correspondingly coated on the surfaces of the conductors in sequence; the insulating support is provided with an accommodating cavity, the outer surface of the accommodating cavity is connected with a plurality of insulating partition plates, an accommodating groove is formed between every two insulating partition plates, and a plurality of conductors coated with insulating layers are correspondingly accommodated in the accommodating grooves respectively to form a conductor bundle; the wrapping belt and the outer sheath are sequentially wrapped on the outer side surfaces of the conductors in the bundle-shaped structure and are connected with one ends of the insulating partition plates far away from the containing cavity; the inorganic mineral filling structure is filled in the plurality of accommodating grooves and the accommodating cavity on the inner side of the wrapping tape. According to the mineral fireproof power line, the insulating supports are arranged inside the wrapping tape, and the conductors are respectively arranged in the accommodating grooves formed by the insulating supports, so that the conductors are isolated to a certain extent.

Description

Mineral fireproof power line
Technical Field
The invention relates to the technical field of electric fittings, in particular to a mineral fireproof power line.
Background
The electric energy supply is an essential important component for production and life of people, and the fireproof performance of the cable is the most important link in electricity safety. In the development history of cables with fireproof performance, common fireproof cables and mineral-insulated cables have appeared, and the latter has appeared as rigid mineral-insulated cables and flexible fireproof cables. The power cord is an important cable for connecting an external power supply and electrical appliances, and for the fire prevention measures of household electricity, the improvement of the fire prevention performance of the power cord is also very important.
However, some existing power cords often ignore fire protection measures, and in a domestic environment, the power cord is exposed to a large number of heat sources, thereby creating a safety hazard.
Disclosure of Invention
Based on this, it is necessary to provide a mineral fireproof power line for solving the technical problem that the existing power line lacks of fireproof measures.
A mineral fireproof power line comprises a plurality of conductors, an insulating layer, an insulating support, an inorganic mineral filling structure, a wrapping tape and an outer sheath; the conductors are contained in the wrapping tape and the outer sheath; the insulating layers are correspondingly coated on the surfaces of the conductors in sequence; the insulation support is provided with an accommodating cavity, the outer surface of the accommodating cavity is connected with a plurality of insulation partition plates, an accommodating groove is formed between every two insulation partition plates, and a plurality of conductors coated with insulation layers are correspondingly accommodated in the accommodating grooves respectively to form a conductor bundle; the wrapping belt and the outer sheath are sequentially wrapped on the outer side surfaces of the conductors in the bundle-shaped structure and are connected with one ends of the insulating partition plates far away from the accommodating cavity; the inorganic mineral filling structure is filled in the plurality of containing grooves and the containing cavity on the inner side of the wrapping belt.
In one embodiment, the inorganic mineral filling structure is a porous solid made of silicon binder, inorganic mineral metal hydrate, silicate modifier, silicate curing agent, pigment, and the like.
In one embodiment, the inorganic mineral metal hydrate includes magnesium hydroxide.
In one embodiment, the insulation layer includes a mica tape layer and a crosslinked polyethylene layer, and the mica tape layer and the crosslinked polyethylene layer are stacked in sequence to cover the surface of the corresponding conductor.
In one embodiment, the insulating support is made of cross-linked polyethylene.
In one embodiment, the tape comprises a glass cloth tape.
In one embodiment, the outer sheath is made of a low-smoke halogen-free flame-retardant polyolefin sheath material.
In summary, the mineral fireproof power cord disclosed by the invention has the advantages that the insulating support is arranged inside the wrapping tape, and the conductors are respectively arranged in the accommodating grooves formed by the insulating support, so that the conductors are isolated to a certain extent. And inorganic mineral substance filling structure mainly includes magnesium hydrate, and it has the adiabatic function of cooling to this can absorb the heat that corresponds the conductor and produce at the electrically conductive in-process in a plurality of accepting grooves, thereby effectively slows down the rise of the inside temperature of mineral substance fire prevention power cord. In addition, the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin sheathing material, so that the flame retardant property and the heat-resistant service life of the mineral fireproof power line are further improved.
Drawings
Fig. 1 is a schematic structural diagram of a mineral fireproof power cord in one embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, the present invention discloses a mineral fireproof power line, which includes a plurality of conductors 1, an insulating layer 2, an insulating support 3, an inorganic mineral filling structure 4, a tape 5 and an outer sheath 6. The plurality of conductors 1 are arranged at the center of the mineral fireproof power line, the insulating layers 2 are correspondingly coated on the surfaces of the plurality of conductors 1 in sequence, the insulating support 3 is provided with a containing cavity 31, the outer surface of the containing cavity 31 is connected with a plurality of insulating partition plates 32, containing grooves 321 are formed between every two insulating partition plates 32, the plurality of conductors 1 coated with the insulating layers 2 are correspondingly contained in the containing grooves 321 to form a conductor 1 bundle, the wrapping belt 5 and the outer sheath 6 are sequentially coated on the outer side surfaces of the plurality of conductors 1 in a bundle-shaped structure and connected with one ends, far away from the containing cavity 31, of the plurality of insulating partition plates 32, and the inorganic mineral filling structure 4 is filled in the containing grooves 321 on the inner side of the wrapping belt 5 and the containing cavity 31. In practical application, the insulating layer 2 can make the plurality of conductors 1 have insulating properties and temperature resistance to a certain extent, and the insulating support 3 can separate the plurality of conductors 1 into the corresponding accommodating grooves 321, so that the plurality of conductors 1 are isolated to a certain extent, and independent heat insulation and heat dissipation are performed through the inorganic mineral substance filling structures 4 in the corresponding accommodating grooves 321, so that the fireproof heat resistance of the mineral substance fireproof power line is further improved.
Further, the inorganic mineral filling structure 4 is a porous solid made of components such as a silicon adhesive, an inorganic mineral metal hydrate, a silicate modifier, a silicate curing agent, a pigment and the like. The inorganic mineral filling structure 4 does not contain any combustible substance, has excellent fireproof effect, and can be dehydrated in the temperature rising process so as to absorb a large amount of heat, thereby achieving the purpose of flame retardance.
Wherein the inorganic mineral metal hydrate comprises magnesium hydroxide. Specifically, when the temperature around the conductors 1 rises to 350 ℃, magnesium hydroxide is subjected to a chemical reaction to generate magnesium oxide and water, the inorganic mineral filling structure 4 releases free water molecules, and the water molecules are evaporated and cooled in the process of releasing the water molecules, so that the temperature rise inside the mineral fireproof power line is slowed down. In addition, the porous structure of the inorganic mineral filling structure 4 has the functions of heat preservation and heat insulation, can delay the chemical reaction of metal hydrates such as magnesium hydroxide and the like, and simultaneously delay the evaporation of water molecules; when free water molecule evaporation is almost exhausted, porous inorganic mineral substance filled structure 4 can further play isolated goods source, delay the effect that power cord inner structure heaies up, can also adsorb the flue gas that produces in the combustion process simultaneously here to this production that reduces smog.
Further, the insulating layer 2 includes a mica tape layer 21 and a crosslinked polyethylene layer 22, and the insulating support 3 is made of crosslinked polyethylene. Wherein, the mica tape layer 21 and the crosslinked polyethylene layer 22 are stacked in sequence to cover the surface of the corresponding conductor 1. Specifically, the volume resistivity of the mica tape layer 21 at room temperature is not less than
Figure DEST_PATH_IMAGE001
Its degradation temperature is 800 ℃ (see standard GB/T19666-2005 appendix C); the crosslinked polyethylene has excellent heat resistance, is not decomposed and carbonized at 200 ℃ or less, has a long-term working temperature of 90 ℃, and has good insulating properties, a small dielectric loss tangent and little influence of temperature. The double-layer composite structure of the insulating layer 2 can ensure that the internal temperature of the power line is still 500-600 ℃ under the test conditions (950 ℃, 3 h) specified by the standard BS6387:1994, the temperature range is lower than the degradation temperature of the mica tape layer 21, and therefore, the power supply can be ensuredThe wire is used in normal operation under combustion conditions.
Further, band 5 includes the glass strap, and the overall structure can be stabilized to the glass strap to have the water proof function. Specifically, when water or external force of the external environment impacts, the interior of the mineral fireproof power line cannot be interfered, and the glass cloth belt has a certain flame-retardant effect while the influence of the external environment on the electric conductivity of the power line is avoided.
Further, the outer sheath 6 is prepared by adopting a low-smoke halogen-free flame-retardant polyolefin sheath material. Specifically, the low-smoke halogen-free flame-retardant polyolefin sheath material is prepared by combining polyolefin blending resin, a flame-retardant filler and a proper amount of antioxidant. The flame-retardant filler comprises aluminum hydroxide and magnesium hydroxide, so that the flame-retardant performance of the outer sheath 6 is effectively improved. The outer sheath 6 made of the low-smoke halogen-free flame-retardant polyolefin sheathing material can effectively reduce the generation of halogen and toxic smoke when the power line is burnt, thereby improving the use safety of the power line and achieving the purpose of environmental protection. In addition, the antioxidant can effectively improve the heat-resisting life of the outer sheath 6, and the surface of the extruded outer sheath 6 forms a layer of non-melting and non-combustible oxide in the burning process of the power cord, so that the passage of the thermal oxidation reaction between the high polymer and the outside is blocked.
In summary, the mineral fireproof power cord disclosed by the invention has the advantages that the insulating support is arranged inside the wrapping tape, and the conductors are respectively arranged in the accommodating grooves formed by the insulating support, so that the conductors are isolated to a certain extent. And inorganic mineral substance filling structure mainly includes magnesium hydrate, and it has the adiabatic function of cooling to this can absorb the heat that corresponds the conductor and produce at the electrically conductive in-process in a plurality of accepting grooves, thereby effectively slows down the rise of the inside temperature of mineral substance fire prevention power cord. In addition, the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin sheathing material, so that the flame retardant property and the heat-resistant service life of the mineral fireproof power line are further improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

1. A mineral fire-resistant power cord, comprising: the cable comprises a plurality of conductors, an insulating layer, an insulating bracket, an inorganic mineral filling structure, a wrapping tape and an outer sheath; the conductors are contained in the wrapping tape and the outer sheath; the insulating layer correspondingly covers the surfaces of the conductors;
the insulation support is provided with an accommodating cavity, the outer surface of the accommodating cavity is connected with a plurality of insulation partition plates, an accommodating groove is formed between every two insulation partition plates, and a plurality of conductors coated with the insulation layers are correspondingly accommodated in the accommodating grooves respectively to form a conductor bundle;
the wrapping belt and the outer sheath are sequentially wrapped on the outer side surfaces of the conductors in the bundle structure and are connected with one ends of the insulating partition plates far away from the accommodating cavity;
the inorganic mineral filling structure is filled in the accommodating grooves on the inner side of the wrapping belt and the accommodating cavity.
2. The mineral fireproof power cord of claim 1, wherein the inorganic mineral filling structure is a porous solid made of components such as a silicon binder, an inorganic mineral metal hydrate, a silicate modifier, a silicate curing agent, and a pigment.
3. The mineral fire protection power cord of claim 2, wherein the inorganic mineral metal hydrate comprises magnesium hydroxide.
4. The mineral fireproof power cord according to claim 1, wherein the insulating layer comprises a mica tape layer and a crosslinked polyethylene layer, and the mica tape layer and the crosslinked polyethylene layer are stacked in sequence to cover the surface of the conductor.
5. The mineral fire protection power cord of claim 1, wherein the insulating support is made of cross-linked polyethylene.
6. The mineral fire-resistant power cord of claim 1, wherein the tape comprises a glass cloth tape.
7. The mineral fireproof power wire according to claim 1, wherein the outer sheath is made of a low smoke halogen-free flame retardant polyolefin sheath material.
CN202210084358.1A 2022-01-25 2022-01-25 Mineral fireproof power line Pending CN114530285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210084358.1A CN114530285A (en) 2022-01-25 2022-01-25 Mineral fireproof power line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210084358.1A CN114530285A (en) 2022-01-25 2022-01-25 Mineral fireproof power line

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003346563A (en) * 2002-05-22 2003-12-05 Fujikura Ltd Flat cable
CN210443287U (en) * 2019-09-28 2020-05-01 巨锋线缆有限公司 Silica gel insulation fireproof cable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003346563A (en) * 2002-05-22 2003-12-05 Fujikura Ltd Flat cable
CN210443287U (en) * 2019-09-28 2020-05-01 巨锋线缆有限公司 Silica gel insulation fireproof cable

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