CN210223649U - Flame-retardant high-voltage power cable - Google Patents
Flame-retardant high-voltage power cable Download PDFInfo
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- CN210223649U CN210223649U CN201921531590.5U CN201921531590U CN210223649U CN 210223649 U CN210223649 U CN 210223649U CN 201921531590 U CN201921531590 U CN 201921531590U CN 210223649 U CN210223649 U CN 210223649U
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Abstract
The utility model provides a flame-retardant high-voltage power cable, which comprises a cable core, an inner flame-retardant tube, a wrapping layer, a shielding layer and an outer flame-retardant tube, wherein the inner flame-retardant tube, the wrapping layer, the shielding layer and the outer flame-retardant tube are sequentially wrapped outside the cable core; the inner flame-retardant tube comprises an inner tube and an outer tube sleeved outside the inner tube, a gap is reserved between the inner tube and the outer tube, a plurality of outer flame-retardant strips are arranged in the gap, the outer flame-retardant strips extend along the axial direction of the cable, the plurality of outer flame-retardant strips are distributed circumferentially, and the outer flame-retardant strips, the inner tube and the outer tube are integrally formed. The utility model discloses set up the interior fire-retardant pipe in cable core outside, all leave the clearance between the inner tube of interior fire-retardant pipe and the outer tube and between inner tube and the elastic tube, improved the heat dispersion and the fire behaviour of cable; the cable core adopts the hollow net pipe filled with the fire clay as the central support, the elastic pipe is wrapped and the elastic flame-retardant material is filled in the elastic pipe, so that the flame-retardant performance of the cable core and the torsion resistance and extrusion resistance of the cable core are effectively improved, the cable cannot be easily torn when being subjected to external pressure, and the quality of the cable is ensured.
Description
Technical Field
The utility model relates to a power cable technical field especially relates to a fire-retardant type high voltage power cable.
Background
Along with the continuous enlargement of industries such as China power industry, data communication industry, urban rail transit industry, automobile industry, shipbuilding and the like, the demand on electric wires and cables is rapidly increased, the electric wires and cables have huge development potential in the future, the demand on the cables is higher and higher to meet the market demand, the use environment of the electric power cable is complex, the electric power cable is easy to burn when meeting high temperature, and for some high-temperature extreme environment occasions, the electric power cable with excellent flame retardant property is needed to improve the safety of the operation occasions.
SUMMERY OF THE UTILITY MODEL
Based on the technical problem who exists among the background art, the utility model provides a fire-retardant type high voltage power cable.
The utility model provides a fire-retardant type high voltage power cable, including the cable core and wrap up in proper order at the outside interior flame retardant tube of cable core, around covering, shielding layer and outer flame retardant tube; the inner flame-retardant tube comprises an inner tube and an outer tube sleeved outside the inner tube, a gap is reserved between the inner tube and the outer tube, a plurality of outer flame-retardant strips are arranged in the gap, the outer flame-retardant strips extend along the axial direction of the cable, the plurality of outer flame-retardant strips are distributed circumferentially, and the outer flame-retardant strips, the inner tube and the outer tube are integrally formed.
Preferably, the cable core includes elasticity pipe and many wires, and elasticity pipe extends along cable axial, and many wires set up in the elasticity pipe and the wire extends along cable axial, and the clearance between many wires and the elasticity pipe is filled with elasticity flame retardant material.
Preferably, a gap is reserved between the inner tube and the elastic tube, a plurality of inner flame-retardant strips integrally formed with the inner tube are arranged in the gap, the inner flame-retardant strips extend along the axial direction of the cable, the inner flame-retardant strips are distributed circumferentially, one side, far away from the inner tube, of each inner flame-retardant strip abuts against the elastic tube, and the elastic tube is sunken towards the center of the cable.
Preferably, the cable core further comprises a hollow net pipe, the hollow net pipe is arranged in the center of the elastic pipe and extends along the axial direction of the cable, fire clay is filled in the hollow net pipe, and the plurality of wires are uniformly distributed around the hollow net pipe in a circumferential manner.
Preferably, the hollow mesh tube is woven by a plurality of warps and a plurality of wefts, and the warps and the wefts are made of flame-retardant rubber materials.
Preferably, the thickness of the inner flame-retardant strip is greater than that of the outer flame-retardant strip, and the width of the gap between the inner tube and the outer tube is equal to that of the gap between the inner tube and the elastic tube.
Preferably, the wire comprises a conductor and an insulating layer wrapped around the conductor.
The utility model provides a fire-retardant type high voltage power cable sets up interior fire-retardant pipe in cable core outside, all leaves the clearance between the inner tube of interior fire-retardant pipe and the outer tube and between inner tube and the elastic tube, has improved heat dispersion and the fire behaviour of cable; the cable core adopts the hollow net pipe filled with the fire clay as the central support, the elastic pipe is wrapped and the elastic flame-retardant material is filled in the elastic pipe, so that the flame-retardant performance of the cable core and the torsion resistance and extrusion resistance of the cable core are effectively improved, the cable cannot be easily torn when being subjected to external pressure, and the quality of the cable is ensured.
Drawings
Fig. 1 is the utility model provides a fire-retardant type high voltage power cable's structural schematic.
Detailed Description
Referring to fig. 1, the utility model provides a flame-retardant high-voltage power cable, which comprises a cable core, an inner flame-retardant tube, a wrapping layer 1, a shielding layer 2 and an outer flame-retardant tube 3, wherein the inner flame-retardant tube, the wrapping layer 1, the shielding layer 2 and the outer flame-retardant tube are sequentially wrapped outside the cable core; wherein:
the cable core comprises an elastic tube 7, a hollow net tube 11 and a plurality of wires 8, the elastic tube 7 extends along the axial direction of the cable, the hollow net tube 11 and the plurality of wires 8 are all arranged in the elastic tube 7, the hollow net tube 11 and the wires 8 extend along the axial direction of the cable, refractory mortar 12 is filled in the hollow net tube 11, the hollow net tube 11 is arranged in the center of the elastic tube 7, the plurality of wires 8 are uniformly distributed around the hollow net tube 11 in a circumferential mode, each wire 8 comprises a conductor and an insulating layer wrapping the outer portion of the conductor, and elastic flame-retardant materials 9 are filled in gaps between the plurality of wires 8 and the elastic tube 7.
The inner flame-retardant tube comprises an inner tube 4 and an outer tube 5 sleeved outside the inner tube 4. Leave the clearance and be equipped with the outer fire retardant strip 6 that a plurality of fire-retardant rubber made in this clearance between inner tube 4 and the outer tube 5, outer fire retardant strip 6 is the circumference along cable axial extension and a plurality of outer fire retardant strips 6 and distributes, and outer fire retardant strip 6 and inner tube 4, 5 homogeneous body shaping of outer tube. A gap is reserved between the inner tube 4 and the elastic tube 7, a plurality of inner flame-retardant strips 10 made of flame-retardant rubber which is integrally formed with the inner tube 4 are arranged in the gap, the inner flame-retardant strips 10 extend along the axial direction of the cable, the inner flame-retardant strips 10 are distributed circumferentially, one side of each inner flame-retardant strip 10, which is far away from the inner tube 4, abuts against the elastic tube 7, and the elastic tube 7 is sunken towards the center of the cable.
Through the arrangement, the utility model discloses the power cable core adopts the hollow net pipe 11 that is filled with the fire clay 12 as the center support, adopts the outsourcing of elastic tube 7 and fills the elasticity fire-retardant material 9 in the elastic tube 7, has effectively improved the fire behavior of cable core and the antitorque of cable core, anti extrusion performance, when making the cable suffer external pressure, can not tear easily to guarantee the quality of cable; an inner flame-retardant tube is arranged outside the cable core, and gaps are reserved between the inner tube 4 and the outer tube 5 of the inner flame-retardant tube and between the inner tube 4 and the elastic tube 7, so that the heat dissipation performance and the flame retardant performance of the cable are improved.
In this embodiment, the hollow mesh tube 11 is woven by a plurality of warps and a plurality of wefts, and both the warps and the wefts are made of flame-retardant rubber materials.
In this embodiment, the thickness of the inner flame-retardant strip 10 is greater than that of the outer flame-retardant strip 6, and the width of the gap between the inner tube 4 and the outer tube 5 is equal to that of the gap between the inner tube 4 and the elastic tube 7.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The flame-retardant high-voltage power cable is characterized by comprising a cable core, an inner flame-retardant tube, a wrapping layer (1), a shielding layer (2) and an outer flame-retardant tube (3), wherein the inner flame-retardant tube, the wrapping layer (1), the shielding layer (2) and the outer flame-retardant tube are sequentially wrapped outside the cable core; the inner flame-retardant tube comprises an inner tube (4) and an outer tube (5) sleeved outside the inner tube (4), a gap is reserved between the inner tube (4) and the outer tube (5), a plurality of outer flame-retardant strips (6) are arranged in the gap, the outer flame-retardant strips (6) are circumferentially distributed along the axial extension of a cable, and the outer flame-retardant strips (6) are integrally formed with the inner tube (4) and the outer tube (5).
2. The flame retardant high voltage power cable according to claim 1, wherein the cable core comprises an elastic tube (7) and a plurality of wires (8), the elastic tube (7) extends in the axial direction of the cable, the plurality of wires (8) are arranged in the elastic tube (7) and the wires (8) extend in the axial direction of the cable, and gaps between the plurality of wires (8) and the elastic tube (7) are filled with the elastic flame retardant material (9).
3. The flame-retardant high-voltage power cable according to claim 2, wherein a gap is formed between the inner tube (4) and the elastic tube (7), a plurality of inner flame-retardant strips (10) integrally formed with the inner tube (4) are arranged in the gap, the inner flame-retardant strips (10) extend in the axial direction of the cable, the plurality of inner flame-retardant strips (10) are circumferentially distributed, and one side of each inner flame-retardant strip (10) away from the inner tube (4) presses against the elastic tube (7) and enables the elastic tube (7) to be recessed towards the center of the cable.
4. The flame-retardant high-voltage power cable according to claim 2 or 3, wherein the cable core further comprises a hollow mesh tube (11), the hollow mesh tube (11) is arranged in the center of the elastic tube (7) and extends along the axial direction of the cable, the hollow mesh tube (11) is filled with fire clay (12), and the plurality of wires (8) are uniformly distributed around the circumference of the hollow mesh tube (11).
5. The flame retardant high voltage power cable according to claim 4, wherein the hollow mesh tube (11) is woven from a plurality of warp threads and a plurality of weft threads, and both the warp threads and the weft threads are made of a flame retardant rubber material.
6. The flame-retardant high-voltage power cable according to claim 3, wherein the thickness of the inner flame-retardant strip (10) is greater than the thickness of the outer flame-retardant strip (6), and the width of the gap between the inner tube (4) and the outer tube (5) is equal to the width of the gap between the inner tube (4) and the elastic tube (7).
7. The flame retardant high voltage power cable according to claim 2 or 3, wherein the conductor (8) comprises a conductor and an insulating layer wrapped around the conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921531590.5U CN210223649U (en) | 2019-09-12 | 2019-09-12 | Flame-retardant high-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921531590.5U CN210223649U (en) | 2019-09-12 | 2019-09-12 | Flame-retardant high-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210223649U true CN210223649U (en) | 2020-03-31 |
Family
ID=69921063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921531590.5U Active CN210223649U (en) | 2019-09-12 | 2019-09-12 | Flame-retardant high-voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210223649U (en) |
-
2019
- 2019-09-12 CN CN201921531590.5U patent/CN210223649U/en active Active
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