CN215954861U - Multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable - Google Patents
Multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable Download PDFInfo
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- CN215954861U CN215954861U CN202122465369.8U CN202122465369U CN215954861U CN 215954861 U CN215954861 U CN 215954861U CN 202122465369 U CN202122465369 U CN 202122465369U CN 215954861 U CN215954861 U CN 215954861U
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Abstract
The utility model discloses a multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable which sequentially comprises a conductor core, a copper sheath and a magnesium oxide insulating layer filled in the copper sheath from an inner layer to an outer layer; the conductor core comprises a center conductor and a special-shaped conductor twisted outside the center conductor; and an arc groove matched with the outer wall of the central conductor is formed in the single special-shaped conductor. The conductors are formed by twisting and pressing special-shaped single conductors, gaps exist between adjacent single special-shaped conductors, when a cable is bent, the conductors can slide relatively by utilizing the bending and twisting of the cable, stress points are uniform, and magnesium oxide insulation is not easy to break through extrusion and a copper sheath is not easy to break through pulling; preventing the leakage of the magnesium oxide insulating layer.
Description
Technical Field
The utility model relates to the technical field of fireproof cables, in particular to a fireproof cable with a multi-core flexible conductor, a magnesium oxide mineral insulating copper pipe sheath.
Background
The national standard of the conventional magnesium oxide mineral insulated cable is specified as a solid copper conductor, which causes the magnesium oxide insulating layer to be easily crushed and the copper sheath to be easily torn due to the high hardness and bending of the cable in the production and installation processes of products, particularly products with larger sections.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multi-core flexible conductor magnesium oxide mineral insulation copper pipe sheath fireproof cable, which solves the problems that the conventional magnesium oxide mineral insulation cable is inconvenient to bend in the using process, an insulation layer is easily broken by extrusion and a copper sheath is easily damaged.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable which sequentially comprises a conductor core, a copper sheath and a magnesium oxide insulating layer filled in the copper sheath from an inner layer to an outer layer;
the conductor core comprises a center conductor and a special-shaped conductor twisted outside the center conductor; and an arc groove matched with the outer wall of the central conductor is formed in the single special-shaped conductor.
In this embodiment, it is further optimized that the central conductor and the special-shaped conductor are both copper conductors.
In this embodiment, it is further optimized that a single special-shaped conductor is similar to an arc triangle, and an arc groove adapted to the outer wall of the central conductor is formed at one corner of the arc triangle.
In this embodiment, it is further optimized that a single special-shaped conductor is similar to a circular arc quadrangle, and contact surfaces between adjacent special-shaped conductors are contact arc surfaces that are mutually matched and a gap is reserved.
Compared with the prior art, the utility model has the beneficial technical effects that: the conductors are formed by twisting and pressing special-shaped single conductors, gaps exist between adjacent single special-shaped conductors, when a cable is bent, the conductors can slide relatively by utilizing the bending and twisting of the cable, stress points are uniform, and magnesium oxide insulation is not easy to break through extrusion and a copper sheath is not easy to break through pulling; preventing the leakage of the magnesium oxide insulating layer.
Drawings
The utility model is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic main body view of a multi-core flexible conductor magnesium oxide mineral insulated copper tube sheathed fireproof cable according to the present invention;
FIG. 2 is a schematic diagram of a stranded conductor in the multi-core flexible conductor magnesium oxide mineral insulated copper tube sheathed fireproof cable of the utility model;
FIG. 3 is another schematic cross-sectional view of a main body of the fireproof cable with a multi-core flexible conductor, magnesium oxide mineral insulating copper pipe sheath according to the present invention;
fig. 4 is a schematic view of another stranded conductor in the multi-core flexible conductor magnesium oxide mineral insulated copper tube sheathed fireproof cable of the utility model.
Description of reference numerals:
1. a first center conductor; 1a, a second first central conductor; 2. a first profiled conductor; 2a, a second first special-shaped conductor; 3. a magnesium oxide insulating layer; 4. a copper sheath.
Detailed Description
As shown in fig. 1, the embodiment discloses a multicore flexible conductor magnesium oxide mineral insulated copper pipe sheath fireproof cable, which sequentially comprises four conductor cores, a copper sheath 4 and a magnesium oxide insulating layer 3 filled in the copper sheath 4 from an inner layer to an outer layer;
example 1
As shown in fig. 2, in the present embodiment, the conductor core includes a first center conductor 1 and a first shaped conductor 2 twisted outside the first center conductor 1;
wherein the first central conductor 1 and the first specially-shaped conductor 2 are both copper conductors;
the single first special-shaped conductor 2 is similar to an arc triangle, and an arc groove matched with the outer wall of the first central conductor 1 is formed in one corner of the arc triangle; namely, the first special-shaped conductor 2 can be regarded as an arc triangle, and a radian matched and attached with the first central conductor 1 is cut off at one corner of the arc triangle;
the first special-shaped conductors 2 are of arc triangular structures, so that when the cable is bent between the adjacent first special-shaped conductors 2, the first special-shaped conductors 2 can slide between the inner side and the outer side of the bent part through gaps between the first special-shaped conductors, damage to the magnesium oxide insulating layer is reduced, and the cable is convenient to bend;
in addition, in the present embodiment, the magnesium oxide insulating layer 3 serves to perform a flame retardant function, and magnesium hydroxide may be used as a flame retardant material.
Example 2
As shown in fig. 3 and 4, in the present embodiment, the conductor core includes a second shaped conductor 2a that is stranded outside a second central conductor 1a and a second central conductor 1 a;
wherein the second central conductor 1a and the second specially-shaped conductor 2a are both copper conductors;
the single second special-shaped conductor 2a is similar to a circular arc quadrangle, and the bottom edge of the circular arc quadrangle is of an arc structure matched with the outer wall of the second central conductor 1 a;
in addition, the contact surface between the adjacent second special-shaped conductors 2a is also in an arc structure, and a reserved gap which is approximate to an ellipse exists; the second special-shaped conductors 2a are of arc quadrilateral structures, so that when the cable is bent between the adjacent second special-shaped conductors 2a, gaps exist between the second special-shaped conductors 2a, the second special-shaped conductors 2a slide between the inner side and the outer side of the bent position, damage to the magnesium oxide insulating layer is reduced, and the cable is convenient to bend.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (4)
1. The utility model provides a multicore flexible conductor magnesium oxide mineral insulation copper pipe sheath fireproof cable which characterized in that: the cable comprises a conductor core, a copper sheath and a magnesium oxide insulating layer filled in the copper sheath from an inner layer to an outer layer in sequence;
the conductor core comprises a center conductor and a special-shaped conductor twisted outside the center conductor; and an arc groove matched with the outer wall of the central conductor is formed in the single special-shaped conductor.
2. The multi-core flexible conductor magnesium oxide mineral insulation copper pipe sheath fireproof cable of claim 1, wherein: the central conductor and the special-shaped conductor are both copper conductors.
3. The multi-core flexible conductor magnesium oxide mineral insulation copper pipe sheath fireproof cable of claim 1, wherein: the single special-shaped conductor is similar to an arc triangle, and an arc groove matched with the outer wall of the central conductor is formed in one corner of the arc triangle.
4. The multi-core flexible conductor magnesium oxide mineral insulation copper pipe sheath fireproof cable of claim 1, wherein: the single special-shaped conductor is similar to a circular arc quadrangle, and the contact surfaces between the adjacent special-shaped conductors are contact arc surfaces matched with each other, and a gap is reserved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122465369.8U CN215954861U (en) | 2021-10-13 | 2021-10-13 | Multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122465369.8U CN215954861U (en) | 2021-10-13 | 2021-10-13 | Multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215954861U true CN215954861U (en) | 2022-03-04 |
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ID=80414189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122465369.8U Active CN215954861U (en) | 2021-10-13 | 2021-10-13 | Multi-core flexible conductor magnesium oxide mineral insulating copper pipe sheath fireproof cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215954861U (en) |
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2021
- 2021-10-13 CN CN202122465369.8U patent/CN215954861U/en active Active
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