CN215988201U - Special-shaped flame-retardant aluminum alloy low-voltage power cable - Google Patents
Special-shaped flame-retardant aluminum alloy low-voltage power cable Download PDFInfo
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- CN215988201U CN215988201U CN202122304921.5U CN202122304921U CN215988201U CN 215988201 U CN215988201 U CN 215988201U CN 202122304921 U CN202122304921 U CN 202122304921U CN 215988201 U CN215988201 U CN 215988201U
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Abstract
The utility model discloses a special-shaped flame-retardant aluminum alloy low-voltage power cable in the technical field of power cables, which comprises an inner sheath, wherein a flame-retardant pipe is arranged in the middle of an inner cavity of the inner sheath, three groups of fan-shaped insulating plates are arranged on the circumferential outer wall of the flame-retardant pipe in an annular array mode, a cable core member is arranged between every two adjacent groups of fan-shaped insulating plates, a heat insulation layer is arranged on the outer wall of the inner sheath, and a ceramic fireproof and fire-resistant composite belt is arranged on the outer wall of the heat insulation layer. The outer sheath and the inner sheath adopt 125 ℃ irradiation crosslinking halogen-free flame-retardant polyolefin sheaths, are resistant to 125 ℃ high temperature and do not delay combustion, generate low smoke quantity, do not generate harmful gas and smoke, reduce potential safety hazards, and are provided with the flame-retardant rubber layer, the cavity in the flame-retardant rubber layer is filled with inert gas, and after the flame-retardant rubber layer is burnt and broken, the inert gas flows out to play a role in extinguishing a fire, so that the action of fire on a cable is slowed down, the fusing of an internal lead is relieved, and time is won for cutting off a cable power supply.
Description
Technical Field
The utility model relates to the technical field of power cables, in particular to a special-shaped flame-retardant aluminum alloy low-voltage power cable.
Background
A cable made of one or more mutually insulated conductors and an outer insulating layer, the conductors carrying power or information from one point to another, usually a rope-like cable twisted from several or several groups of conductors, each group being insulated from each other and usually twisted around a center, the whole being covered with a highly insulating layer, the cable being characterized by an inner current supply and an outer insulation.
When the conventional special-shaped flame-retardant aluminum alloy low-voltage power cable is in conductive operation, the temperature of the external environment and the heat generated by self conduction increase the temperature of an aluminum alloy conductor, the cable is easy to burn at high temperature or in fire, and although most of the special-shaped flame-retardant aluminum alloy low-voltage power cables have certain fire resistance, the fire resistance is weaker, so that the special-shaped flame-retardant aluminum alloy low-voltage power cable is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a special-shaped flame-retardant aluminum alloy low-voltage power cable to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: the abnormal flame-retardant aluminum alloy low-voltage power cable comprises an inner sheath, wherein a flame-retardant pipe is arranged in the middle of an inner cavity of the inner sheath, three groups of fan-shaped insulation plates are arranged on the outer wall of the circumference of the flame-retardant pipe in an annular array mode, the other side of each fan-shaped insulation plate is connected with the inner wall of the inner sheath, cable core pieces are arranged between every two adjacent groups of fan-shaped insulation plates, a heat insulation layer is arranged on the outer wall of the inner sheath, a ceramic fireproof and fire-resistant composite belt is arranged on the outer wall of the heat insulation layer, a flame-retardant rubber layer is sleeved on the outer wall of the ceramic fireproof and fire-resistant composite belt, and an outer sheath is sleeved on the outer wall of the flame-retardant rubber layer.
Further, the cable core part comprises a conductor sheath, an insulating layer is arranged on the inner wall of the conductor sheath, a shielding layer is arranged on the inner wall of the insulating layer, a conductor is arranged on the inner wall of the shielding layer, and filling layers are arranged at positions between the inner wall of the inner sheath, the outer wall of the flame-retardant pipe and the two adjacent sets of fan-shaped insulating plates.
Furthermore, the outer wall of the circumference of the flame-retardant rubber layer is integrally formed with a plurality of groups of arc-shaped convex parts, and the inner wall of the outer sheath is provided with arc-shaped grooves matched with the arc-shaped convex parts in an annular array.
Further, an air separation layer is formed between every two adjacent groups of the arc-shaped convex parts, and copper wires are arranged in the air separation layer.
Furthermore, an annular cavity is formed in the flame-retardant rubber layer, arc-shaped cavities communicated with the annular cavity are formed in the plurality of groups of arc-shaped convex parts, and inert gas is sealed in the cavity and the arc-shaped cavity.
Furthermore, a silica gel column penetrates through the center hole of the flame-retardant tube.
Compared with the prior art, the utility model has the beneficial effects that: the outer sheath and the inner sheath adopt 125 ℃ irradiation crosslinking halogen-free flame retardant polyolefin sheaths, are resistant to 125 ℃ high temperature and do not delay combustion, generate low smoke quantity, do not generate harmful gas and smoke, reduce potential safety hazards, are provided with the flame retardant rubber layer, inert gas is filled in the cavity inside the flame retardant rubber layer, after the flame retardant rubber layer is burnt and broken, the inert gas flows out to play a role in fire extinguishing, the action of fire on the cable is slowed down, the fusing of an internal lead is relieved, time is won for cutting off a cable power supply, a ceramic fireproof and fire-resistant composite tape is arranged, if a fire disaster happens, a hard ceramic shell can be formed to protect the cable, the service life of the cable is prolonged, and the air separation layer and the copper wire are arranged, partial heat can be conducted when the fire disaster happens, the central temperature is reduced, the strength of the cable can be effectively increased, and the phenomenon that the external heat is transmitted to the inside of the cable to damage the internal structure when the fire around the cable occurs is avoided, meanwhile, the cable is provided with the silica gel column and the flame-retardant tube, so that the flame-retardant and fireproof performance of the cable is further improved, and the tensile property of the cable is also improved.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is an enlarged perspective view of structure A of FIG. 1 in accordance with the present invention;
fig. 3 is a perspective view, partially in section, of fig. 2 in accordance with the present invention.
In the figure: 1. an inner sheath; 2. a fan-shaped insulating plate; 3. a core member; 31. a conductor sheath; 32. an insulating layer; 33. a shielding layer; 34. a conductor; 4. a filling layer; 5. a thermal insulation layer; 6. a ceramic fireproof and fireproof composite belt; 7. a flame retardant rubber layer; 8. an arc-shaped convex part; 9. a copper wire; 10. an air separation layer; 11. an outer sheath; 12. a flame retardant tube; 13. a silica gel column; 14. a cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, the present invention provides a technical solution: the special-shaped flame-retardant aluminum alloy low-voltage power cable comprises an inner sheath 1, wherein the inner sheath 1 and an outer sheath 11 can adopt a 125 ℃ irradiation crosslinking halogen-free flame-retardant polyolefin sheath, the cable is resistant to 125 ℃ high temperature and does not delay combustion, the generated smoke volume is low, harmful gas and smoke are not generated, a flame-retardant pipe 12 is arranged in the middle of an inner cavity of the inner sheath 1, the flame-retardant pipe 12 is widely applied in the field and is not detailed in detail, three groups of fan-shaped insulation plates 2 are annularly arranged on the outer wall of the circumference of the flame-retardant pipe 12, the fan-shaped insulation plates 2 separate internal cable core members 3 to prevent short circuit caused by mutual adhesion in case of fire, the other sides of the fan-shaped insulation plates 2 are connected with the inner wall of the inner sheath 1, a cable core member 3 is arranged between two adjacent groups of fan-shaped insulation plates 2, a heat insulation layer 5 is arranged on the outer wall of the inner sheath 1, the heat insulation layer 5 prevents high-temperature interference cables 3 from being burnt outside, and the heat insulation layer 5 is widely applied in the field, the ceramic fireproof and fireproof composite belt 6 is arranged on the outer wall of the inner heat insulation layer 5, a hard ceramic shell can be formed on the ceramic fireproof and fireproof composite belt 6 when a fire disaster occurs to protect the cable, the service life of the cable is prolonged, the flame-retardant rubber layer 7 is sleeved on the outer wall of the ceramic fireproof and fireproof composite belt 6, the outer sheath 11 is sleeved on the outer wall of the flame-retardant rubber layer 7, and the flame-retardant rubber layer 7 is widely applied in the field and is not described in detail herein.
As shown in fig. 2: the cable core member 3 comprises a conductor sheath 31, an insulating layer 32 is arranged on the inner wall of the conductor sheath 31, a shielding layer 33 is arranged on the inner wall of the insulating layer 32, the conductor sheath 31, the insulating layer 32 and the shielding layer 33 are widely applied in the field, detailed description is not needed, a conductor 34 is arranged on the inner wall of the shielding layer 33, the conductor 34 can be made of 8030 aluminum alloy conductors, the continuity and stability of performance can be kept when overload and overheating are carried out for a long time, the electric conductivity and the high temperature resistance of the cable can be greatly improved, the cable is certainly not limited to the material, detailed description is not needed, a filling layer 4 is arranged on the inner wall of the inner sheath 1, the outer wall of the flame-retardant pipe 12 and the position between two adjacent groups of the fan-shaped insulation plates 2, and the filling layer 4 is rock wool filling material;
as shown in fig. 1-2: the circumference outer wall integrated into one piece of fire-retardant rubber layer 7 has multiunit arc convex part 8, and the arc recess with the adaptation of arc convex part 8 is seted up to outer sheath 11 inner wall annular array, improves the compressive property of this cable on the one hand through arc convex part and arc recess, has still improved the antitorque commentaries on classics performance of this cable.
Example 2
As shown in fig. 1-3: an air separation layer 10 is formed between every two adjacent groups of arc-shaped convex parts 8, so that the situation that when fire happens around the cable, external heat is prevented from being transmitted to the inside of the cable, the internal structure is damaged, copper wires 9 are arranged in the air separation layer 10, the copper wires 9 can conduct partial heat when the fire happens, the central temperature is reduced, the strength of the cable can be effectively increased, the cable is not easy to break, and the internal cable core part 3 can be protected from being damaged;
as shown in fig. 2-3: an annular cavity 14 is formed in the flame-retardant rubber layer 7, arc-shaped cavities communicated with the annular cavity 14 are formed in the plurality of groups of arc-shaped convex parts 8, inert gas is sealed in the cavity 14 and the inner cavities of the arc-shaped cavities, and after the arc-shaped cavities are burned and broken, the inert gas flows out to achieve a fire extinguishing effect, so that the action of fire on a cable is slowed down, the fusing of an internal lead is relieved, and time is won for cutting off a power supply of the cable;
as shown in fig. 2: the silica gel column 13 penetrates through the center hole of the flame-retardant tube 12, the silica gel column 13 can conduct part of heat, and the silica gel has good toughness and can not burn, so that the silica gel can provide a supporting function for the cable core piece 3 after the fan-shaped insulating plate 2 fails, and can share the external force applied to the cable core piece 3, and the cable core piece is prevented from being broken off when being subjected to the external force.
The rest of the structure is the same as in example 1.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Fire-retardant aluminum alloy low voltage power cable of abnormal shape, including inner sheath (1), its characterized in that: the fire-retardant pipe (12) is arranged in the middle of an inner cavity of the inner sheath (1), three groups of fan-shaped insulation boards (2) are arranged on the outer wall of the circumference of the fire-retardant pipe (12) in an annular array mode, the other sides of the fan-shaped insulation boards (2) are connected with the inner wall of the inner sheath (1), two adjacent groups of cable core pieces (3) are arranged between the fan-shaped insulation boards (2), a heat insulation layer (5) is arranged on the outer wall of the inner sheath (1), a ceramic fire-proof and fire-resistant composite belt (6) is arranged on the outer wall of the heat insulation layer (5), a fire-retardant rubber layer (7) is sleeved on the outer wall of the ceramic fire-proof and fire-resistant composite belt (6), and an outer sheath (11) is sleeved on the outer wall of the fire-retardant rubber layer (7).
2. The profiled flame-retardant aluminum alloy low-voltage power cable as claimed in claim 1, wherein: the cable core piece (3) comprises a conductor sheath (31), an insulating layer (32) is arranged on the inner wall of the conductor sheath (31), a shielding layer (33) is arranged on the inner wall of the insulating layer (32), a conductor (34) is arranged on the inner wall of the shielding layer (33), and a filling layer (4) is arranged between the inner wall of the inner sheath (1), the outer wall of the flame-retardant pipe (12) and the adjacent two groups of fan-shaped insulation plates (2).
3. The profiled flame-retardant aluminum alloy low-voltage power cable as claimed in claim 1, wherein: the outer wall of the circumference of the flame-retardant rubber layer (7) is integrally formed with a plurality of groups of arc-shaped convex parts (8), and arc-shaped grooves matched with the arc-shaped convex parts (8) are formed in the inner wall of the outer sheath (11) in an annular array mode.
4. The profiled flame-retardant aluminum alloy low-voltage power cable as claimed in claim 3, wherein: an air separation layer (10) is formed between every two adjacent groups of arc-shaped convex parts (8), and copper wires (9) are arranged in the air separation layer (10).
5. The profiled flame-retardant aluminum alloy low-voltage power cable as claimed in claim 4, wherein: an annular cavity (14) is formed in the flame-retardant rubber layer (7), arc-shaped cavities communicated with the annular cavity (14) are formed in the plurality of groups of arc-shaped convex parts (8), and inert gases are sealed in the cavity (14) and the arc-shaped cavities.
6. The profiled flame-retardant aluminum alloy low-voltage power cable as claimed in claim 1, wherein: a silica gel column (13) penetrates through the center hole of the flame-retardant tube (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122304921.5U CN215988201U (en) | 2021-09-23 | 2021-09-23 | Special-shaped flame-retardant aluminum alloy low-voltage power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122304921.5U CN215988201U (en) | 2021-09-23 | 2021-09-23 | Special-shaped flame-retardant aluminum alloy low-voltage power cable |
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| CN215988201U true CN215988201U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122304921.5U Active CN215988201U (en) | 2021-09-23 | 2021-09-23 | Special-shaped flame-retardant aluminum alloy low-voltage power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117116543A (en) * | 2023-09-11 | 2023-11-24 | 河南华东电缆股份有限公司 | High-flexibility ceramic polyolefin high-flame-retardance fireproof cable |
-
2021
- 2021-09-23 CN CN202122304921.5U patent/CN215988201U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117116543A (en) * | 2023-09-11 | 2023-11-24 | 河南华东电缆股份有限公司 | High-flexibility ceramic polyolefin high-flame-retardance fireproof cable |
| CN117116543B (en) * | 2023-09-11 | 2024-01-26 | 河南华东电缆股份有限公司 | High-flexibility ceramic polyolefin high-flame-retardance fireproof cable |
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