CN211907048U - High-flame-retardant fire-resistant special medium-voltage cable - Google Patents
High-flame-retardant fire-resistant special medium-voltage cable Download PDFInfo
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- CN211907048U CN211907048U CN202020338970.3U CN202020338970U CN211907048U CN 211907048 U CN211907048 U CN 211907048U CN 202020338970 U CN202020338970 U CN 202020338970U CN 211907048 U CN211907048 U CN 211907048U
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Abstract
The utility model discloses a high flame-retardant fire-resistant special medium voltage cable in the technical field of cables, which comprises a steel wire, wherein an annular array of the outer wall of the steel wire is provided with three groups of pressure-resistant blocks, three groups of outer walls of the pressure-resistant blocks are provided with an inner sheath, a filling layer is arranged between the inner wall of the inner sheath and the outer wall of the steel wire, a flame-retardant layer is wound on the outer wall of the inner sheath, the annular array of the outer wall of the flame-retardant layer is provided with a plurality of groups of supporting bodies, an arc-shaped heat-insulating plate is arranged between two adjacent groups of supporting bodies, the outer wall of the elastic extrusion strip is provided with an armor layer, the outer wall of the armor layer is provided with an outer sheath, the utility model is provided with a flame-retardant filling layer, the flame-retardant fire-resistant performance of the cable is, the safety performance is obviously improved, and the circuit can be kept smooth when a fire disaster happens.
Description
Technical Field
The utility model relates to the technical field of cables, specifically be a fire-resistant special medium voltage cable of high fire-retardant.
Background
At present, cables are widely applied to the fields of electric power, communication transmission and the like, and the cables are widely applied to various fields along with the continuous development of scientific technology, but the cables used in the existing industry cannot meet the requirements of people at present due to unreasonable structural design, the existing cables are poor in flame-retardant and fire-resistant performance, the cables cannot be used when a fire disaster happens, meanwhile, the compression resistance is low, the use of the cables is limited, and therefore, a high-flame-retardant and fire-resistant special medium-voltage cable is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high fire-retardant fire-resistant special medium voltage cable to solve the problem of proposing in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a high-flame-retardant and fire-resistant special medium-voltage cable comprises a steel wire, wherein three groups of anti-pressing blocks are arranged on an annular array of the outer wall of the steel wire, placing holes are formed in the three groups of anti-pressing blocks, conductor sheaths are arranged in the placing holes, wrapping tapes are arranged in the conductor sheaths, insulating shielding layers are arranged in the wrapping tapes, insulating layers are arranged in the insulating shielding layers, conductor shielding layers are arranged in the insulating layers, conductors are arranged in the conductor shielding layers, an inner sheath is arranged on the outer wall of each anti-pressing block, a filling layer is arranged between the inner wall of the inner sheath and the outer wall of the steel wire, a flame-retardant layer is wrapped on the outer wall of the inner sheath, a plurality of groups of supporting bodies are arranged on the annular array of the outer wall of the flame-retardant layer, arc-shaped heat insulation, and a flame-retardant filler layer is filled between every two adjacent groups of elastic extrusion strips at the bottom, an armor layer is arranged on the outer wall of each elastic extrusion strip at the top, and an outer sheath is arranged on the outer wall of each armor layer.
Furthermore, three sets of resistance to compression piece are close to the one end of copper wire and all seted up the arc spacing groove that matches with the copper wire.
Further, be the mica tape around the band, the inner sheath inner wall is provided with outer shielding layer, and outer shielding layer sets up in three groups the anti-pressing block outside.
Further, the flame-retardant layer is a ceramic silicon rubber layer, and the arc-shaped heat-insulating plate is a glass fiber heat-insulating plate.
Furthermore, the vertical section of the elastic extrusion strip is triangular, one end of the elastic extrusion strip, which is far away from the support body, is set to be arc-shaped, and arc-shaped grooves matched with the elastic extrusion strip are formed in the inner wall of the armor layer and the outer wall of the flame-retardant layer.
Further, the outer sheath and the inner sheath are both irradiation cross-linked halogen-free flame-retardant polyolefin sheaths at 125 ℃.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model discloses be provided with that oversheath and inner sheath are 125 ℃ irradiation cross-linking halogen-free flame retardant polyolefin sheath and able to bear 125 ℃ high temperature and not delay burning, the smoke volume that produces is low, do not produce harmful gas and smog, be provided with fire-retardant packing bed, improve the fire-retardant fire resistance of cable, be provided with fire-retardant layer and filling layer, further improve the fire-retardant fire resistance of cable, the arc heat insulating board that sets up simultaneously, when the conflagration takes place, the conflagration risk that makes this cable lead to because of the temperature rise can descend by a wide margin, the security performance is showing and is promoting, can keep the circuit unobstructed when the conflagration takes place, make installation of this cable lay and service environment;
2) the utility model discloses be provided with anti briquetting, when receiving ambient pressure, can effectual protection be located its inside sinle silk, be provided with the elastic extrusion strip, the pressure that this cable of buffering that can be fine received reduces the damage of ambient pressure to the cable, and the setting of copper wire improves the compliance and the pull resistance of this cable simultaneously, makes the whole life of this cable longer.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a steel wire; 2. anti-briquetting; 3. a conductor sheath; 4. wrapping a tape; 5. an insulating shield layer; 6. an insulating layer; 7. a conductor; 8. a filling layer; 9. an inner sheath; 10. a flame retardant layer; 11. a support body; 12. an arc-shaped heat insulation plate; 13. a flame-retardant filler layer; 14. elastically extruding the strip; 15. an armor layer; 16. an outer sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: referring to fig. 1, the special medium voltage cable with high flame retardance and fire resistance comprises a steel wire 1, wherein the steel wire 1 has stronger tensile strength, so that when an external tensile force is applied to the cable, the steel wire 1 bears a larger tensile force, and the whole cable has stronger tensile strength;
referring to fig. 1, three groups of pressure-resistant blocks 2 are arranged on the outer wall of a steel wire 1 in an annular array, the pressure-resistant blocks 2 are made of hard rubber materials, and the hard rubber materials have high energy absorption and buffering properties and can effectively protect wire cores inside the hard rubber blocks when external pressure is applied;
referring to fig. 1, placing holes are formed in the three groups of anti-pressing blocks 2, conductor sheaths 3 are arranged in the placing holes, wrapping tapes 4 are arranged in the conductor sheaths 3, insulation shielding layers 5 are arranged in the wrapping tapes 4, insulation layers 6 are arranged in the insulation shielding layers 5, conductor shielding layers are arranged in the insulation layers 6, conductors 7 are arranged in the conductor shielding layers, and the conductor sheaths 3, the insulation shielding layers 5, the conductors 7, the insulation layers 6 and the conductor shielding layers are widely applied in the field and are not described in detail herein;
referring to fig. 1, an inner sheath 9 is arranged on the outer wall of the three groups of anti-pressing blocks 2, a filling layer 8 is arranged between the inner wall of the inner sheath 9 and the outer wall of the steel wire 1, and the filling layer 8 can be made of flame-retardant PP filling ropes or PVC filling strips;
referring to fig. 1, a flame retardant layer 10 is wrapped around the outer wall of the inner sheath 9, and the flame retardant layer 10 improves the flame retardant and fireproof performance of the cable;
referring to fig. 1, a plurality of groups of supporting bodies 11 are arranged on the outer wall of a flame-retardant layer 10 in an annular array, the supporting bodies 11 play a role of supporting and installing a structure, an arc-shaped heat insulation plate 12 is arranged between two adjacent groups of supporting bodies 11, the arc-shaped heat insulation plate 12 prevents an internal structure from being damaged due to high external temperature, a circuit can be kept smooth when a fire occurs, elastic extrusion strips 14 are arranged at the top and the bottom of each supporting body 11, the elastic extrusion strips 14 are made of rubber materials, the compression resistance of the cable is further improved, buffering can be performed when pressure is applied, and the elastic extrusion strips 14 at the bottom are;
referring to fig. 1, a flame-retardant filler layer 13 is filled between two sets of elastic extrusion strips 14 adjacent to each other at the bottom, the flame-retardant filler layer 13 may be made of flame-retardant dry powder or expanded graphite, an armor layer 15 is disposed on the outer wall of each elastic extrusion strip 14 at the top, and an outer sheath 16 is disposed on the outer wall of each armor layer 15.
As shown in fig. 1: one end of each of the three groups of anti-pressing blocks 2 close to the steel wire 1 is provided with an arc-shaped limiting groove matched with the steel wire 1, and the arc-shaped limiting grooves enable the interior of the cable to be more compact and play a role in positioning;
as shown in fig. 1: the wrapping tape 4 is a mica tape which is widely applied in the field and is a fire-resistant insulating material, the internal fire-retardant and fireproof performance is improved, an outer shielding layer is arranged on the inner wall of the inner sheath 9 and can be formed by weaving soft copper wires and aramid fibers, the outer shielding layer is arranged outside the three groups of anti-pressing blocks 2, a better shielding effect is achieved by arranging the outer shielding layer, the insulating shielding layer and the conductor shielding layer, the influence of external interference on electric power transmission can be effectively avoided, and the stability of a power grid is improved;
as shown in fig. 1: the flame-retardant layer 10 is a ceramic silicon rubber layer, the ceramic silicon rubber can be sintered into a hard ceramic shell after being combusted, the cable can be effectively prevented from being continuously combusted, in order to achieve uniform and complete extrusion, and avoid the adverse phenomena of scorching, bamboo joints, particles and the like, the extrusion and the wrapping are carried out under the extrusion process conditions that the production speed is 5 m/min and the steam pressure is 0.1Mpa, the arc-shaped heat-insulating plate 12 is a glass fiber heat-insulating plate, so that the fire risk of the cable caused by temperature rise can be greatly reduced, the safety performance is obviously improved, a circuit can be kept smooth when a fire occurs, and the installation, the laying and the use environment of the cable can be wider;
as shown in fig. 1: the vertical section of the elastic extrusion strip 14 is triangular, one end of the elastic extrusion strip 14, which is far away from the support body 11, is arc-shaped, so that the damage to the armor layer 15 and the flame-retardant layer 10 is avoided, the contact area is increased, arc-shaped grooves matched with the elastic extrusion strip 14 are formed in the inner wall of the armor layer 15 and the outer wall of the flame-retardant layer 10, and the positioning effect is achieved;
the outer sheath 16 and the inner sheath 9 are both 125 ℃ irradiation crosslinking halogen-free flame retardant polyolefin sheaths, the 125 ℃ irradiation crosslinking halogen-free flame retardant polyolefin sheaths can resist 125 ℃ high temperature and do not delay combustion, the generated smoke quantity is low, and harmful gas and smoke are not generated.
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 (6)
1. The utility model provides a high fire-retardant fire-resistant special type medium voltage cable, includes copper wire (1), its characterized in that: the steel wire (1) outer wall annular array is provided with three groups of anti-pressing blocks (2), the anti-pressing blocks (2) are all provided with placing holes, conductor sheaths (3) are arranged in the placing holes, a winding tape (4) is arranged in the conductor sheaths (3), an insulation shielding layer (5) is arranged in the winding tape (4), an insulation layer (6) is arranged in the insulation shielding layer (5), a conductor shielding layer is arranged in the insulation layer (6), conductors (7) are arranged in the conductor shielding layer, the anti-pressing blocks (2) outer wall is provided with an inner sheath (9), a filling layer (8) is arranged between the inner wall of the inner sheath (9) and the steel wire (1) outer wall, the inner sheath (9) outer wall is provided with a flame-retardant layer (10), the flame-retardant layer (10) outer wall annular array is provided with a plurality of groups of supporting bodies (11), and an arc-shaped heat, the top and the bottom of the support body (11) are respectively provided with an elastic extrusion strip (14), the elastic extrusion strips (14) at the bottom are connected with the outer wall of the flame-retardant layer (10), a flame-retardant filler layer (13) is filled between every two adjacent groups of elastic extrusion strips (14) at the bottom, the outer wall of each elastic extrusion strip (14) at the top is provided with an armor layer (15), and the outer wall of each armor layer (15) is provided with an outer sheath (16).
2. The special medium voltage cable with high flame retardance and fire resistance as claimed in claim 1, wherein: and arc-shaped limiting grooves matched with the steel wires (1) are formed in one ends, close to the steel wires (1), of the three groups of anti-pressing blocks (2).
3. The special medium voltage cable with high flame retardance and fire resistance as claimed in claim 1, wherein: be the mica tape around band (4), inner sheath (9) inner wall is provided with outer shielding layer, and outer shielding layer sets up in three groups the anti briquetting (2) outside.
4. The special medium voltage cable with high flame retardance and fire resistance as claimed in claim 1, wherein: the flame-retardant layer (10) is a ceramic silicon rubber layer, and the arc-shaped heat-insulating plate (12) is a glass fiber heat-insulating plate.
5. The special medium voltage cable with high flame retardance and fire resistance as claimed in claim 1, wherein: the vertical section of the elastic extrusion strip (14) is triangular, one end, away from the support body (11), of the elastic extrusion strip (14) is arc-shaped, and arc-shaped grooves matched with the elastic extrusion strip (14) are formed in the inner wall of the armor layer (15) and the outer wall of the flame-retardant layer (10).
6. The special medium voltage cable with high flame retardance and fire resistance as claimed in claim 1, wherein: the outer sheath (16) and the inner sheath (9) are both irradiation cross-linking halogen-free flame-retardant polyolefin sheaths at 125 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020338970.3U CN211907048U (en) | 2020-03-18 | 2020-03-18 | High-flame-retardant fire-resistant special medium-voltage cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020338970.3U CN211907048U (en) | 2020-03-18 | 2020-03-18 | High-flame-retardant fire-resistant special medium-voltage cable |
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| CN211907048U true CN211907048U (en) | 2020-11-10 |
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| CN202020338970.3U Active CN211907048U (en) | 2020-03-18 | 2020-03-18 | High-flame-retardant fire-resistant special medium-voltage cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024596A1 (en) * | 2021-08-24 | 2023-03-02 | 江苏亨通线缆科技有限公司 | Flame-retardant fire-resistant power cable resistant to spray and vibration |
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2020
- 2020-03-18 CN CN202020338970.3U patent/CN211907048U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024596A1 (en) * | 2021-08-24 | 2023-03-02 | 江苏亨通线缆科技有限公司 | Flame-retardant fire-resistant power cable resistant to spray and vibration |
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