CN109949991B - 5-core BTTZ mineral insulation fireproof cable - Google Patents
5-core BTTZ mineral insulation fireproof cable Download PDFInfo
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- CN109949991B CN109949991B CN201910260420.6A CN201910260420A CN109949991B CN 109949991 B CN109949991 B CN 109949991B CN 201910260420 A CN201910260420 A CN 201910260420A CN 109949991 B CN109949991 B CN 109949991B
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Abstract
The invention relates to the field of cables, in particular to a 5-core BTTZ mineral insulation fireproof cable which comprises a middle blocking layer, an outer layer protection structure, 1 grounding wire, 3 live wires, 1 zero wire, 3 temperature detection wires and 3 groups of detection wire supports, wherein the live wires, the zero wires, the 3 temperature detection wires and the 3 groups of detection wire supports are arranged in the middle blocking layer, the 3 live wires are arranged around the zero wires in a circular matrix mode, the 3 temperature detection wires are respectively arranged in gaps between every two adjacent live wires, the edge of the outer part of each detection wire support is abutted against the inner wall of the outer layer protection structure, and the inner side of each detection wire support is provided with a positioning support structure for; the outer protective structure sets up outside middle barrier layer, the earth connection sets up at outer protective structure and middle barrier layer, packs fire-retardant material in the cavity between outer protective structure and the middle barrier layer.
Description
Technical Field
The invention relates to the field of cables, in particular to a 5-core BTTZ mineral insulation fireproof cable.
Background
The wire and cable is used for transmitting electric (magnetic) energy, information and wire products for realizing electromagnetic energy conversion. A wire cable in a broad sense, also referred to as a cable for short, refers to an insulated cable, which can be defined as: an aggregate consisting of; one or more insulated wire cores, and their respective possible coatings, total protective layers and outer jackets, the cable may also have additional conductors without insulation.
With the increasing speed of rural urbanization, the population is denser and more concentrated, people pay more and more attention to the electricity utilization safety and fire prevention safety of buildings, the three-phase one-ground power supply circuit designed by the prior power supply system does not meet the higher and higher safety requirements, at present, customers put forward more 5-core cables to realize the three-phase one-ground one-zero five-wire system safety power supply circuit, products in the national standard GB/T13033.1-2007 are 1-core, 2-core, 3-core and 4-core power cables, and control cables are 7-core, 12-core and 19-core power cables without the 5-core power cable standard.
The conductor cable in the prior art is mostly a 4-core cable, such as a chinese patent (publication No. CN102360607B), and the cable is composed of three live wires and a neutral wire, and the cable has no use risk of the neutral wire. In addition, the cables in the prior art lack a monitoring device for internal wires, temperature detection lines are arranged around conductors in some cables, and under the condition that the cables are bent, the temperature detection lines are offset, so that the detection sensitivity is reduced, and even the detection is failed.
Disclosure of Invention
In order to solve the problems, the invention provides a 5-core BTTZ mineral insulation fireproof cable which can detect the temperature of a battery core at any time and can continuously detect the cable even if the cable is bent.
In order to achieve the purpose, the invention adopts the technical scheme that:
the 5-core BTTZ mineral insulation fireproof cable comprises a middle blocking layer, an outer layer protection structure, 1 grounding wire, 3 live wires, 1 zero wire, 3 temperature detection wires and 3 groups of detection wire supports, wherein the live wires, the zero wires, the temperature detection wires and the 3 groups of detection wire supports are arranged in the middle blocking layer, the 3 live wires are arranged around the zero wires in a circular matrix mode, the 3 temperature detection wires are respectively arranged in gaps among 2 adjacent live wires, the edge of the outer side portion of each detection wire support is abutted to the inner wall of the middle blocking layer, and the inner side of each detection wire support is provided with a positioning support structure for limiting the position of the temperature detection wire;
the outer protective structure sets up outside middle barrier layer, the earth connection sets up between outer protective structure and middle barrier layer, packs fire-retardant material in the cavity between outer protective structure and the middle barrier layer.
Preferably, the gap inside the middle barrier layer is a first inner cavity, and the first inner cavity is filled with the flame retardant oil.
Preferably, the detection line support comprises an outer supporting surface abutted to the inner wall of the middle barrier layer and an inner side surface used for supporting the temperature detection line, wherein the center of the inner side surface is provided with a positioning groove with a hemispherical cross section, the positioning groove is used for placing the temperature detection line, the transition sections of the inner wall of the positioning groove and the inner side surface protrude upwards to form a protruding structure, and the protruding structure is used for positioning the detection line support between the outer wall of the live wire and the inner wall of the middle barrier layer.
Preferably, the cross-section of the projection structure is nipple-shaped.
Preferably, the width of the root of the projection is smaller than the width of the main body of the projection.
Preferably, the junction of the convex structure and the inner side surface is in curve smooth transition.
Preferably, the detection wire support is hollow, and the inner side surface is provided with a plurality of inner side through holes so as to communicate the inside of the detection wire support with the first inner cavity.
Preferably, the detection line support is formed by connecting a plurality of support units, each support unit comprises a support unit main body and connecting side belts respectively connected to two axial sides of the support unit main body, each connecting side belt is provided with a hinge structure, and two adjacent support units are connected through the hinge structures.
Preferably, in the connecting side belts on both sides of the bracket unit main body, one connecting belt is provided with a mounting post, the other connecting belt is provided with a mounting hole, and two adjacent bracket units are connected in a manner that the mounting post is inserted into the mounting hole.
Preferably, the outer layer protection structure comprises a low-smoke halogen-free high-flame-retardant wrapping tape, an aluminum alloy tape interlocking armor layer and a low-smoke halogen-free high-flame-retardant extruded outer sheath which are sequentially sleeved from the inner layer to the outer layer.
The beneficial effects of the invention are as follows:
1. this 5 core BTTZ mineral insulation fireproof cable adds the earth connection on 4 core cables's basis for this wire has better safety in utilization. The temperature detection line is arranged on the periphery of the live wire, and the temperature detection line can be fixed at a position close to the unit lead through the detection line support arranged in the first inner cavity, so that the monitoring effect of the temperature detection line is more obvious. The constant head tank location temperature detection line of detection line support medial surface, but protruding structure accurate positioning detection line support is in the position of first inner chamber on the one hand, and on the other hand protruding structure can make things convenient for the temperature detection line to insert in the constant head tank.
2. The inside cavity of detection line support, medial surface are equipped with a plurality of inboard through-holes, make the inside and first inner chamber intercommunication of detection line support, and the inside fuel that hinders that can store of detection line support even this cable bending back has destroyed detection line support inner structure, and the first inner chamber also can be filled to the inside fire-retardant oil of detection line support. In addition, the middle group of interlayer is broken, enough flame-retardant oil can be provided inside the detection line bracket, and the flame-retardant oil in the first inner cavity can also be filled in the broken gap, so that the magnesium oxide powder layer and the flame-retardant oil on the outer layer are mixed into slurry to be sealed in the broken gap.
3. The support unit comprises a connecting side belt on the side face, a hinge structure is arranged on the connecting side belt, the connecting side belt is of a plate belt-shaped structure, when the cable is bent, the connecting side belt is thin and can provide enough bending capacity, part of the support units can provide bending performance through the hinge structure, and the support unit enables the detection line support to have bending resistance through the connecting side belt and the hinge structure ingeniously.
4. The shape of the bulge structure is optimized, the cross section of the bulge structure is nipple-shaped, the bulge structure cannot scratch the outer cladding of the live wire, the bulge structure has certain elasticity, and the bulge structure can deform according to the pressure received by the bulge structure in time when the cable bends and deforms.
Drawings
Fig. 1 is a cross-sectional view of a 5-core BTTZ mineral insulated fireproof cable of the present invention.
Fig. 2 is a sectional view of a bracket unit in the 5-core BTTZ mineral insulated fireproof cable according to the present invention.
Fig. 3 is a side view and a top view corresponding schematic diagram of a bracket unit in the 5-core BTTZ mineral insulated fireproof cable.
Fig. 4 is a schematic top view of a bracket unit in the 5-core BTTZ mineral insulated fireproof cable according to the present invention.
Fig. 5 is a schematic view of the connection of two bracket units in the 5-core BTTZ mineral insulated fireproof cable according to the present invention.
The reference numerals include:
100-live wire, 200-zero wire, 300-temperature detection wire, 400-bracket unit, 410-outer supporting surface, 420-inner side surface, 421-inner side through hole, 430-protrusion structure, 440-positioning groove, 450-bracket inner cavity, 460-connecting side belt, 461-joint, 462-mounting column, 463-mounting hole, 500-grounding wire, 600-middle barrier layer, 700-first inner cavity, 800-second inner cavity, 900-outer layer protection structure, 910-low smoke zero halogen high flame retardant wrapping belt, 920-aluminum alloy belt interlocking armor layer and 930-low smoke zero halogen high flame retardant extruding outer sheath.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
As shown in fig. 1, the embodiment provides a 5-core BTTZ mineral insulated fireproof cable, which includes a middle barrier layer 600, an outer layer protection structure 900, 1 grounding wire 500, and 3 live wires 100, 1 zero wire 200, 3 temperature detection wires 300 and 3 groups of detection wire brackets disposed in the middle barrier layer 600, wherein the 3 live wires 100 are arranged around the zero wire 200 in a circular matrix form, the 3 temperature detection wires 300 are respectively disposed in gaps between adjacent 2 live wires 100, an edge of an outer portion of the detection wire bracket abuts against an inner wall of the middle barrier layer 600, and a positioning support structure limiting a position of the temperature detection wire 300 is disposed inside the detection wire bracket; outer protective structure 900 sets up outside middle barrier layer 600, and earth connection 500 sets up between outer protective structure 900 and middle barrier layer 600, fills fire-retardant material in the cavity between outer protective structure 900 and middle barrier layer 600.
Specifically, in the middle barrier layer 600 in this embodiment, the neutral wire 200 is disposed at a middle position, 3 live wires 100 are uniformly arranged around the neutral wire 200, a copper conductor is disposed between the three live wires 100, and an insulating layer is sleeved outside the copper conductor. Temperature detection lines 300 are inserted into gaps between the 3 live wires 100 and gaps between the neutral wires 200, respectively, and the temperature detection lines 300 can detect the temperature of the live wires 100. Whether the temperature of the live wire 100 changes beyond a threshold value can be detected by a change in the resistance of the temperature detection wire 300. In order to maintain the temperature sensing wire 300 at a position close to the live wire 100, a sensing wire holder is provided at a position between the temperature sensing wire 300 and the intermediate barrier layer 600. In this embodiment, the intermediate barrier layer 600 may be a low-smoke halogen-free high-flame-retardant wrapping tape 910, and the low-smoke halogen-free high-flame-retardant wrapping tape 910 meets the IEC 60332.1 requirement, and may be made of polybrominated diphenyl ether, pentabrominated diphenyl ether, decabrominated diphenyl ether, or other materials.
This 5 core BTTZ mineral insulation fireproof cable adds earth connection 500 on 4 core cables's basis for this wire has better safety in utilization. The temperature detection lines 300 are arranged around the live wire 100, and the temperature detection lines 300 can be fixed at positions close to the unit conductors through the detection line brackets arranged in the first inner cavity 700, so that the monitoring effect of the temperature detection lines 300 is more obvious. The positioning groove 440 of the inner side surface 420 of the test wire holder can position the temperature test wire 300, on one hand, the protrusion structure 430 can accurately position the position of the test wire holder in the first inner cavity 700, and on the other hand, the protrusion structure 430 can facilitate the temperature test wire 300 to be inserted into the positioning groove 440.
The diameter of the inner cavity of the outer protective structure 900 is larger than the outer diameter of the intermediate barrier layer 600, forming a second inner cavity 800, and a ground wire 500 is inserted between the intermediate barrier layer 600 and the outer protective structure 900. By adding the grounding wire 500, when the insulating layer of the five-core cable fails, the grounding wire can directly discharge electricity to the ground.
As shown in fig. 2-5, the detection wire holder includes an outer supporting surface 410 abutting against the inner wall of the middle barrier layer 600 and an inner side surface 420 for supporting the temperature detection wire 300, wherein the center of the inner side surface 420 has a positioning groove 440 with a hemispherical cross section, the positioning groove 440 is used for accommodating the temperature detection wire 300, the inner wall of the positioning groove 440 and the transition section of the inner side surface 420 protrude upwards to form a protruding structure 430, and the protruding structure 430 is used for positioning the detection wire holder between the outer wall of the live wire 100 and the inner wall of the middle barrier layer 600. The raised structure 430 is nipple-shaped in cross-section. The root width of raised structure 430 is less than the width of the body of raised structure 430.
The outer supporting surface 410 of the bracket unit 400 is an arc-shaped surface protruding outwards, the radian of the outer supporting surface 410 is matched with the radian of the inner wall of the middle barrier layer 600, so that the main body of the outer supporting surface 410 can be supported on the inner wall of the middle barrier layer 600 in a fitting manner, the positioning groove 440 is arranged in the middle of the inner side surface 420, the protruding structure 430 is in a nipple shape, the opening of the positioning groove 440 is integrally opened outwards, and the temperature detection line 300 can be conveniently placed into the positioning groove 440.
The transition positions of the outer supporting surface 410 and the inner side surface 420 of the bracket unit 400 are offset towards the inner side surface 420, so that the transition positions of the outer supporting surface 410 and the inner side surface 420 and the top end of the protruding structure 430 can be supported on the outer wall of the live wire 100, and the bracket unit has the characteristics of stable structure and accurate position of fixing the temperature detection wire 300.
The first inner cavity 700 is arranged in the gap inside the middle barrier layer 600, and the second inner cavity 800 is filled with the flame retardant oil. The inside cavity of detection line support, medial surface 420 are equipped with a plurality of inboard through-holes 421, make the inside cavity of detection line support and form support inner chamber 450, support inner chamber 450 and first inner chamber 700 intercommunication, the inside fuel that hinders that can store of detection line support even this cable bending back, has destroyed detection line support inner structure, and the inside fire-retardant oil of detection line support also can be filled in first inner chamber 700. In addition, the intermediate barrier layer 600 is broken, and the flame-retardant oil in the second cavity 800 may be filled into the broken gap, so that the magnesium oxide powder layer and the flame-retardant oil in the outer layer are mixed into slurry to be sealed in the broken gap.
The inner through holes 421 are oval holes arranged at intervals, the long radius direction of the inner through holes 421 is the direction of both ends of the rack unit 400, and the short radius direction of the inner through holes 421 faces the transition positions of the outer support surface 410 and the inner side surface 420.
As shown in fig. 2, the outer support surface 410 of the stent unit 400 and the outer wall of the unit wire 100 form a substantially circular structure to facilitate the intermediate barrier layer 600 to wrap.
In addition, the outer support surface 410 and the inner side surface 420 of the rack unit 400 are both thin-walled structures, and when the cable is bent, the rack unit 400 main body can also provide a certain degree of deformation effect.
The detection line support is formed by connecting a plurality of support units 400, each support unit 400 comprises a support unit 400 main body and connecting side belts 460 which are respectively connected to two axial sides of the support unit 400 main body, each connecting side belt 460 is provided with a hinge structure, and two adjacent support units 400 are connected through the hinge structures.
In the connection side belts 460 on both sides of the body of the rack unit 400, one connection belt has a mounting post 462, the other connection belt has a mounting hole 463, and two adjacent rack units 400 are connected by inserting the mounting post 462 into the mounting hole 463.
The bracket unit 400 comprises a lateral connecting side belt 460, the connecting side belt 460 is provided with a hinge structure, the connecting side belt 460 is of a plate-strip-shaped structure, when the cable is bent, the connecting side belt 460 is thin and can provide enough bending capacity, part of the bracket unit 400 can provide bending performance through the hinge structure, and the detecting wire bracket has bending resistance through the connecting side belt 460 and the hinge structure of the bracket unit 400.
The connection side belt 460 is provided with the joint 461, and the width of the joint 461 and the main body of the connection side belt 460 is smaller than the width of the joint 461, so that when the cable is bent, the bracket unit 400 is firstly broken from the joint of the joint 461 and the main body of the connection side belt 460 after reaching the bending limit, and the function of the bracket unit 400 is not affected.
In this embodiment, the outer protective structure 900 includes a low-smoke halogen-free high-flame-retardant wrapping tape 910, an aluminum alloy tape interlocking armor 920 and a low-smoke halogen-free high-flame-retardant extruded outer sheath 930 which are sequentially sleeved from the inner layer to the outer layer. The low-smoke halogen-free high-flame-retardant wrapping tape 910 has a flame-retardant effect, the aluminum alloy tape interlocking armor 920 can realize shielding and protection effects, and the low-smoke halogen-free high-flame-retardant extruded outer sheath 930 serves as the outermost protection.
The junction of the raised structure 430 and the inner side surface 420 transitions smoothly. When the protruding structure 430 is forced to bend, stress concentration at the root of the protruding structure 430 is avoided, so that the root of the protruding structure 430 is broken. The holder unit 400 is made of a fire-resistant inorganic material, such as epoxy plastic, etc.
In summary, according to the market demand, the client needs to develop a 5-core BTTZ mineral insulated fireproof cable with a cross section from 5 × 2.5.5 to (4 × 25) + 1.
The foregoing is only a preferred embodiment of the present invention, and many variations in the detailed description and the application range can be made by those skilled in the art without departing from the spirit of the present invention, and all changes that fall within the protective scope of the invention are therefore considered to be within the scope of the invention.
Claims (6)
1.5 core BTTZ mineral insulation fireproof cable, its characterized in that: the temperature detection device comprises a middle blocking layer, an outer layer protection structure, 1 grounding wire, 3 live wires, 1 zero wire, 3 temperature detection wires and 3 groups of detection wire supports, wherein the 3 live wires, the 1 zero wire, the 3 temperature detection wires and the 3 groups of detection wire supports are arranged in the middle blocking layer;
the outer-layer protection structure is arranged outside the middle barrier layer, the grounding wire is arranged between the outer-layer protection structure and the middle barrier layer, a second cavity is formed in a cavity between the outer-layer protection structure and the middle barrier layer, and the second cavity is filled with flame retardant oil;
a first inner cavity is formed in a gap inside the middle barrier layer, and fuel barrier oil is filled in the first inner cavity;
the detection line support comprises an outer supporting surface and an inner side surface, the outer supporting surface is abutted to the inner wall of the middle barrier layer, the inner side surface is used for supporting the temperature detection line, a positioning groove with a hemispherical cross section is formed in the center of the inner side surface and used for placing the temperature detection line, transition sections of the inner wall of the positioning groove and the inner side surface protrude upwards to form a protruding structure, and the protruding structure is used for positioning the detection line support between the outer wall of the live wire and the inner wall of the middle barrier;
the detection line bracket is hollow, and a plurality of inner side through holes are formed in the inner side surface of the detection line bracket, so that the interior of the detection line bracket is communicated with the first inner cavity;
the detection line support is formed by connecting a plurality of support units, each support unit comprises a support unit main body and connecting side belts respectively connected to two axial sides of the support unit main body, each connecting side belt is provided with a hinge structure, and two adjacent support units are connected through the hinge structures.
2. The 5-core BTTZ mineral-insulated fireproof cable of claim 1, wherein: the cross section of the bulge structure is in a nipple shape.
3. The 5-core BTTZ mineral-insulated fireproof cable of claim 2, wherein: the width of the root of the protruding structure is smaller than the width of the main body of the protruding structure.
4. The 5-core BTTZ mineral-insulated fireproof cable of claim 1, wherein: the joint of the convex structure and the inner side surface is in curve smooth transition.
5. The 5-core BTTZ mineral-insulated fireproof cable of claim 1, wherein: in the connecting side belts on the two sides of the support unit main body, one connecting belt is provided with a mounting column, the other connecting belt is provided with a mounting hole, and two adjacent support units are connected in a manner of being inserted into the mounting hole through the mounting column.
6. The 5-core BTTZ mineral-insulated fireproof cable of claim 1, wherein: outer protective structure includes by inlayer to outer low smoke and zero halogen high flame retardant package oversheath that suit in proper order, chain armor in aluminum alloy belt and low smoke and zero halogen high flame retardant crowded package oversheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910260420.6A CN109949991B (en) | 2019-04-02 | 2019-04-02 | 5-core BTTZ mineral insulation fireproof cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910260420.6A CN109949991B (en) | 2019-04-02 | 2019-04-02 | 5-core BTTZ mineral insulation fireproof cable |
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| CN109949991A CN109949991A (en) | 2019-06-28 |
| CN109949991B true CN109949991B (en) | 2020-08-04 |
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| CN201910260420.6A Active CN109949991B (en) | 2019-04-02 | 2019-04-02 | 5-core BTTZ mineral insulation fireproof cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110634609A (en) * | 2019-10-28 | 2019-12-31 | 山西金广丰线缆有限公司 | Safe environmental protection cable for fire control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297983A (en) * | 2016-08-24 | 2017-01-04 | 超达电线电缆有限公司 | A kind of composite-type flexible fireproof cable |
| CN106653205A (en) * | 2015-10-29 | 2017-05-10 | 施蓉 | Antitheft alarm cable |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19717645C2 (en) * | 1997-04-25 | 2001-01-18 | Daetwyler Ag Altdorf | Ceramicizable flame retardant composition, process for its manufacture and its use |
| TWI322176B (en) * | 2002-10-17 | 2010-03-21 | Polymers Australia Pty Ltd | Fire resistant compositions |
| CN202058496U (en) * | 2011-06-10 | 2011-11-30 | 安徽华能电缆集团有限公司 | Inorganic-mineral-insulated fire-resistant cable with copper core and stainless steel sheath |
| CN206412136U (en) * | 2016-12-31 | 2017-08-15 | 深圳市标顶科技有限公司 | A kind of electric automobile intelligent charge cable |
| CN207966561U (en) * | 2018-03-22 | 2018-10-12 | 沈阳艾克电缆科技有限公司 | 5 core BTTZ fireproof cables |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653205A (en) * | 2015-10-29 | 2017-05-10 | 施蓉 | Antitheft alarm cable |
| CN106297983A (en) * | 2016-08-24 | 2017-01-04 | 超达电线电缆有限公司 | A kind of composite-type flexible fireproof cable |
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