CN214226564U - Copper core crosslinked polyethylene insulation fire-resistant power cable - Google Patents
Copper core crosslinked polyethylene insulation fire-resistant power cable Download PDFInfo
- Publication number
- CN214226564U CN214226564U CN202120309578.0U CN202120309578U CN214226564U CN 214226564 U CN214226564 U CN 214226564U CN 202120309578 U CN202120309578 U CN 202120309578U CN 214226564 U CN214226564 U CN 214226564U
- Authority
- CN
- China
- Prior art keywords
- fire
- crosslinked polyethylene
- power cable
- steel wire
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model provides an insulating fire-resistant power cable of copper core crosslinked polyethylene, include that from interior to exterior sets gradually conductor copper core, electromagnetic shield layer, crosslinked polyethylene insulating layer, nitrile rubber sheath, spiral winding are in the fire-retardant area of the steamed low fire-resistant mica of nitrile rubber sheath outside. The electromagnetic shielding layer can well inhibit external magnetic fields of various frequencies. The cross-linked polyethylene insulating layer is made of cross-linked polyethylene materials, has the advantages of high mechanical strength, chemical corrosion resistance and strong heat resistance, and can effectively protect the conductor copper core. The nitrile rubber sheath is made of nitrile rubber, has the advantages of good heat resistance and good wear resistance, and can effectively protect the copper core of the conductor. The halogen-free low-smoke fireproof mica flame-retardant tape has the advantages of difficult combustion and good protectiveness, and can well enhance the fire-resistant reliability of the power cable. And the halogen-free low-smoke fireproof mica flame-retardant belt generates less smoke during combustion, so that the danger of fire is not easily promoted.
Description
Technical Field
The utility model relates to a cable, in particular to an insulating fire-resistant power cable of copper core crosslinked polyethylene.
Background
A cable is made of one or more mutually insulated conductors and an outer insulating sheath for transmitting power or information from one location to another. With the continuous promotion of urbanization construction, power cables are widely applied in society, and the engineering usage amount of the power cables is continuously increased. However, the insulation layers and outer jackets employed in current power cables are typically made of organic polymers. In the event of a fire, the insulation layer made of organic polymer and the outer sheath are easily ignited, resulting in damage to the power cable. Moreover, the insulating layer made of organic polymer can generate a large amount of smoke and a little gas after combustion, and the hazard of fire is greatly improved.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a copper core crosslinked polyethylene insulated fire-resistant power cable, which has the advantages of high heat resistance and good fire resistance.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides an insulating fire-resistant power cable of copper core crosslinked polyethylene, includes the conductor copper core, still includes the parcel the electromagnetic shield layer, the parcel of conductor copper core the crosslinked polyethylene insulating layer, the parcel of electromagnetic shield layer the butadiene acrylonitrile rubber sheath, the spiral winding of crosslinked polyethylene insulating layer are in the fire-retardant area of the zero halogen low smoke fire-resistant mica in the butadiene acrylonitrile rubber sheath outside.
Through the technical scheme, the electromagnetic shielding layer can well inhibit external magnetic fields with various frequencies, and does not generate induced potential on the conductor.
The crosslinked polyethylene is a product obtained by crosslinking polyethylene under the action of high-energy rays or a crosslinking agent. The performance of the crosslinked polyethylene obtained by crosslinking modification is greatly improved, the comprehensive performances such as mechanical property, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, electrical property and the like are obviously improved, the heat resistance is obviously improved, the contractibility is reduced, and the crosslinked polyethylene is not melted after being heated. The cross-linked polyethylene insulating layer is made of cross-linked polyethylene materials, has the advantages of high mechanical strength, chemical corrosion resistance and strong heat resistance, and can effectively protect the conductor copper core.
The nitrile rubber is a copolymer polymerized by acrylonitrile and butadiene monomers, is mainly produced by a low-temperature emulsion polymerization method, and has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force. The nitrile rubber sheath is made of nitrile rubber, has the advantages of good heat resistance and good wear resistance, and can effectively protect the copper core of the conductor.
The halogen-free low-smoke fireproof mica flame-retardant tape has the advantages of difficult combustion and good protectiveness, and can well enhance the fire-resistant reliability of the power cable. And the halogen-free low-smoke fireproof mica flame-retardant belt generates less smoke during combustion, so that the danger of fire is not easily promoted.
In conclusion, the copper-core crosslinked polyethylene insulated fire-resistant power cable has the advantages of strong heat resistance and good fire resistance.
Preferably, an asbestos heat insulation layer is arranged between the nitrile rubber sheath and the halogen-free low-smoke fireproof mica flame-retardant belt.
By the above technical solution, asbestos is meant a silicate-based mineral product having high tensile strength, high flexibility, resistance to chemical and thermal attack, electrical insulation and spinnability. Asbestos consists of a bundle of fibers, which in turn consist of very long and thin fibers that can be separated from one another. Asbestos is an important fire, insulation and heat-insulating material with high fire resistance, electrical insulation and thermal insulation. The asbestos heat insulation layer can obstruct the conduction of heat, so that the crosslinked polyethylene heat insulation layer and the nitrile rubber sheath are not easy to damage due to overheating.
Preferably, a galvanized steel wire armor layer is arranged between the asbestos thermal insulation layer and the halogen-free low-smoke fire-resistant mica flame-retardant tape.
Through the technical scheme, the galvanized steel wire armor layer is used as shielding, and the galvanized steel wire has high magnetic conductivity, can well inhibit external magnetic fields of various frequencies, and cannot generate induced potential on the conductor. In addition, the galvanized steel wire armor layer has certain tensile strength and is suitable for laying conditions with certain fall.
Preferably, the galvanized steel wire armor layer comprises a plurality of galvanized steel wire ropes wound in a cross mode, and through holes are formed among the galvanized steel wire ropes wound in the cross mode.
Through the technical scheme, the galvanized steel wire armor layer formed by the crossed winding of the galvanized steel wire ropes has high magnetic permeability, can well inhibit external magnetic fields of various frequencies, and cannot generate induced potential on the conductor. Through holes are formed between the galvanized steel wire ropes which are wound in a cross mode, the using amount of the galvanized steel wire ropes can be reduced to a certain extent, and the production cost is reduced.
Preferably, a high silica glass fiber filling layer is arranged between the galvanized steel wire armor layer and the halogen-free low-smoke fire-resistant mica flame-retardant belt.
By the technical scheme, the high silica glass fiber is a short-name of high-purity silica amorphous continuous fiber, and can continuously resist the temperature of 1000 ℃ and temporarily resist the temperature of 1400 ℃. The high silica glass fiber can keep good strength and elasticity for a long time at the temperature of 1000 ℃; the high-temperature resistant alloy has low heat conductivity coefficient, has good resistance to high-temperature impact, is inert to most chemicals, has good corrosion resistance to compounds at high temperature, corrosive minerals and weakly alkaline molten alloy, and can normally and continuously work under the conditions of high heat and strong radiation. The high silica glass fiber filling layer is made of high silica glass fibers, and has extremely strong heat resistance and heat insulation performance, so that the power cable is not easy to damage in a high-temperature environment.
Preferably, the high silica glass fiber filling layer comprises a filling main body wrapping the galvanized steel wire armor layer and a filling connecting block arranged in an inner ring of the filling main body, and the filling connecting block penetrates through the through hole.
Through above-mentioned technical scheme, pack the connecting block and stretch into in the through-hole of galvanized steel wire armor for fix a position galvanized steel wire armor, make galvanized steel wire armor be difficult for displacement to appear in the power cable use, guarantee with this that galvanized steel wire armor can provide comparatively effectual support and protection to power cable.
Preferably, the side wall of the filling connection block is provided with a storage groove, the galvanized steel wire rope is arranged in the storage groove, and the outer wall of the galvanized steel wire rope is attached to the inner groove wall of the storage groove.
Through above-mentioned technical scheme, galvanized steel wire rope sets up and is accomodating inslot portion, and galvanized steel wire rope's outer wall and the interior cell wall in accomodating the groove laminate mutually, so galvanized steel wire rope is difficult for taking place to buckle, and galvanized steel wire armor can provide comparatively effectual support and protection to power cable.
Preferably, the nitrile rubber sheath is including the parcel the inner sheath of crosslinked polyethylene insulating layer, rotate the cover and establish the outside oversheath of inner sheath, the spread groove has been seted up to the lateral wall department of inner sheath, the both ends of spread groove are link and response end respectively, the inner wall department of oversheath is provided with the locating piece, the locating piece inserts in the spread groove, the link with be provided with the spring between the locating piece, the spring orders about through elasticity the response end support tightly in the locating piece.
Through the technical scheme, when the outer sheath and the inner sheath are punctured by foreign matters, the first opening is formed on the outer sheath, and the second opening is formed on the inner sheath. In the initial state, the first opening and the second opening are opposite up and down and communicated, at the moment, the crosslinked polyethylene insulating layer is exposed in the air, and the nitrile rubber sheath cannot provide effective protection for the crosslinked polyethylene insulating layer. However, when the foreign matter in the second opening moves out, the spring can push the inner sheath through elasticity, so that the inner sheath rotates in the outer sheath in the circumferential direction until the inner sheath which is disconnected into two sections supports tightly, the second opening is covered by the inner sheath, the inner sheath can provide effective protection for the crosslinked polyethylene insulating layer again, and the crosslinked polyethylene insulating layer is not easy to damage.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
fig. 2 is an enlarged view of a portion a of fig. 1.
Reference numerals: 1. a conductor copper core; 2. an electromagnetic shielding layer; 3. a crosslinked polyethylene insulating layer; 4. a nitrile rubber sheath; 41. an inner sheath; 42. an outer sheath; 5. a halogen-free low-smoke fire-resistant mica flame-retardant tape; 6. an asbestos insulation layer; 7. a galvanized steel wire armor layer; 71. a galvanized steel wire rope; 8. a through hole; 9. a high silica glass fiber filler layer; 91. filling the body; 92. filling connecting blocks; 10. a receiving groove; 11. connecting grooves; 111. a connecting end; 112. a response end; 12. positioning blocks; 13. a spring.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.
A copper core crosslinked polyethylene insulation fire-resistant power cable is shown in figures 1 and 2 and comprises a conductor copper core 1, an electromagnetic shielding layer 2, a crosslinked polyethylene insulation layer 3, a nitrile rubber sheath 4, an asbestos thermal insulation layer 6, a galvanized steel wire armor layer 7, a high silica glass fiber filling layer 9 and a halogen-free low-smoke fire-resistant mica fire-resistant tape 5 which are sequentially arranged from inside to outside.
The electromagnetic shielding layer 2 is formed by spirally winding a shielding copper strip, the edges of the shielding copper strip are tightly abutted, the electromagnetic shielding layer can well inhibit external magnetic fields of various frequencies, and no induced potential is generated on a conductor.
The cross-linked polyethylene insulating layer 3 is made of cross-linked polyethylene, has the advantages of high mechanical strength, chemical corrosion resistance and strong heat resistance, and can effectively protect the conductor copper core 1. The crosslinked polyethylene is a product obtained by crosslinking polyethylene under the action of high-energy rays or a crosslinking agent. The performance of the crosslinked polyethylene obtained by crosslinking modification is greatly improved, the comprehensive performances such as mechanical property, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, electrical property and the like are obviously improved, the heat resistance is obviously improved, the contractibility is reduced, and the crosslinked polyethylene is not melted after being heated.
The nitrile rubber sheath 4 is made of nitrile rubber, has the advantages of good heat resistance and good wear resistance, and can effectively protect the conductor copper core 1. The nitrile rubber is a copolymer polymerized by acrylonitrile and butadiene monomers, is mainly produced by a low-temperature emulsion polymerization method, and has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force.
The nitrile rubber sheath 4 comprises an inner sheath 41 wrapping the crosslinked polyethylene insulating layer 3 and an outer sheath 42 rotatably sleeved outside the inner sheath 41. The connecting groove 11 is opened at the lateral wall of the inner sheath 41, the connecting groove 11 is arranged along the circumference of the inner sheath 41, and the two ends of the connecting groove 11 are respectively a connecting end 111 and a response end 112. The inner wall of the outer sheath 42 is provided with a positioning block 12, the positioning block 12 is inserted into the connecting groove 11, a spring 13 is arranged between the connecting end 111 and the positioning block 12, and the spring 13 drives the response end 112 to abut against the positioning block 12 through elastic force.
The asbestos insulation layer 6 can block the heat conduction, so that the crosslinked polyethylene insulation layer 3 and the nitrile rubber sheath 4 are not easy to damage due to overheating. Asbestos refers to silicate-based mineral products having high tensile strength, high flexibility, resistance to chemical and thermal attack, electrical insulation and spinnability. Asbestos consists of a bundle of fibers, which in turn consist of very long and thin fibers that can be separated from one another. Asbestos is an important fire, insulation and heat-insulating material with high fire resistance, electrical insulation and thermal insulation.
The galvanized steel wire armor layer 7 can well inhibit external magnetic fields with various frequencies, and does not generate induced potential on the conductor. In addition, the galvanized steel wire armor layer 7 has certain tensile strength and is suitable for laying conditions with certain fall. The galvanized steel wire armor layer 7 is formed by crossly winding galvanized steel wire ropes 71, and through holes 8 are formed between the crossly wound galvanized steel wire ropes 71.
The high silica glass fiber filling layer 9 is made of high silica glass fibers, and has extremely strong heat resistance and heat insulation performance, so that the power cable is not easy to damage in a high-temperature environment. The high silica glass fiber is a short name of high-purity silicon oxide amorphous continuous fiber, and can continuously resist the temperature of 1000 ℃ and temporarily resist the temperature of 1400 ℃. The high silica glass fiber can keep good strength and elasticity for a long time at the temperature of 1000 ℃; the high-temperature resistant alloy has low heat conductivity coefficient, has good resistance to high-temperature impact, is inert to most chemicals, has good corrosion resistance to compounds at high temperature, corrosive minerals and weakly alkaline molten alloy, and can normally and continuously work under the conditions of high heat and strong radiation.
The high silica glass fiber filling layer 9 comprises a filling main body 91 wrapping the galvanized steel wire armor layer 7 and a filling connecting block 92 arranged in the inner ring of the filling main body 91, and the filling connecting block 92 penetrates through the through hole 8. The side wall of the filling connection block 92 is provided with a storage groove 10, the galvanized steel wire rope 71 is arranged in the storage groove 10, and the outer wall of the galvanized steel wire rope 71 is attached to the inner wall of the storage groove 10.
The halogen-free low-smoke fire-resistant mica flame-retardant belt 5 is spirally wound on the surface of the high silica glass limiting filling layer, and the edges of the halogen-free low-smoke fire-resistant mica flame-retardant belt 5 are mutually abutted. The halogen-free low-smoke fireproof mica flame-retardant tape 5 has the advantages of difficult combustion and good protectiveness, and can well enhance the fire-resistant reliability of the power cable. And the halogen-free low-smoke fireproof mica flame-retardant belt 5 generates less smoke during combustion, so that the danger of fire is not easily promoted.
Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.
Claims (8)
1. The utility model provides an insulating fire-resistant power cable of copper core crosslinked polyethylene, includes conductor copper core (1), characterized by: still including the parcel electromagnetic shield layer (2), the parcel of conductor copper core (1) crosslinked polyethylene insulating layer (3), the parcel of electromagnetic shield layer (2) nitrile rubber sheath (4), the spiral winding of crosslinked polyethylene insulating layer (3) are in there is not steamed fire-resistant mica fire-retardant area (5) of low cigarette in nitrile rubber sheath (4) outside.
2. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 1, characterized in that: an asbestos heat insulation layer (6) is arranged between the nitrile rubber sheath (4) and the halogen-free low-smoke fireproof mica flame-retardant belt (5).
3. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 2, characterized in that: a galvanized steel wire armor layer (7) is arranged between the asbestos heat-insulating layer (6) and the halogen-free low-smoke fireproof mica flame-retardant belt (5).
4. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 3, characterized in that: the galvanized steel wire armor layer (7) comprises a plurality of galvanized steel wire ropes (71) which are wound in a cross mode, and through holes (8) are formed among the galvanized steel wire ropes (71) which are wound in the cross mode.
5. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 4, characterized in that: and a high silica glass fiber filling layer (9) is arranged between the galvanized steel wire armor layer (7) and the halogen-free low-smoke fire-resistant mica flame-retardant tape (5).
6. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 5, characterized in that: the high silica glass fiber filling layer (9) comprises a filling main body (91) wrapping the galvanized steel wire armor layer (7) and a filling connecting block (92) arranged in an inner ring of the filling main body (91), and the filling connecting block (92) penetrates through the through hole (8).
7. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 6, characterized in that: the side wall of the filling connecting block (92) is provided with a storage groove (10), the galvanized steel wire rope (71) is arranged in the storage groove (10), and the outer wall of the galvanized steel wire rope (71) is attached to the inner wall of the storage groove (10).
8. The copper-core crosslinked polyethylene insulated fire-resistant power cable according to claim 1, characterized in that: nitrile rubber sheath (4) are including the parcel inner sheath (41), the rotation cover of crosslinked polyethylene insulating layer (3) are established outer oversheath (42) of inner sheath (41) outside, spread groove (11) have been seted up to the lateral wall department of inner sheath (41), the both ends of spread groove (11) are link (111) and response end (112) respectively, the inner wall department of oversheath (42) is provided with locating piece (12), locating piece (12) insert in spread groove (11), link (111) with be provided with spring (13) between locating piece (12), spring (13) order about through elasticity response end (112) support tightly in locating piece (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120309578.0U CN214226564U (en) | 2021-02-03 | 2021-02-03 | Copper core crosslinked polyethylene insulation fire-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120309578.0U CN214226564U (en) | 2021-02-03 | 2021-02-03 | Copper core crosslinked polyethylene insulation fire-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214226564U true CN214226564U (en) | 2021-09-17 |
Family
ID=77692177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120309578.0U Active CN214226564U (en) | 2021-02-03 | 2021-02-03 | Copper core crosslinked polyethylene insulation fire-resistant power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214226564U (en) |
-
2021
- 2021-02-03 CN CN202120309578.0U patent/CN214226564U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207602277U (en) | A kind of novel low smoke zero halogen fire resistant fireproof control cable | |
| CN104464941A (en) | Novel insulated cable | |
| CN210378552U (en) | Environment-friendly anti-dragging high-temperature-resistant industrial cable | |
| CN214226564U (en) | Copper core crosslinked polyethylene insulation fire-resistant power cable | |
| CN205751626U (en) | A kind of mineral insulated cable | |
| CN216250051U (en) | Aluminum alloy interlocking armored cable | |
| CN205789175U (en) | Flexible mineral insulation fireproof cable | |
| CN205751680U (en) | A kind of crosslinked polyetylene insulated multicore flame retardant cable | |
| CN204315280U (en) | A kind of Novel fire-resistant insulated cable | |
| CN210039742U (en) | Fire-resistant cable with crosslinked polyethylene insulating steel strip armored polyvinyl chloride sheath | |
| CN210667880U (en) | Flexible mineral insulation fireproof cable | |
| CN105913959A (en) | Crosslinked polyethylene insulated multi-core flame retardant cable | |
| CN214043120U (en) | Integrated mineral insulated cable with temperature measuring tube | |
| CN220400261U (en) | Mineral cable | |
| CN214671953U (en) | Armored power cable | |
| CN214226548U (en) | Crosslinked polyvinyl chloride insulation armored fireproof cable | |
| CN204360817U (en) | A kind of isolated form steel-tape armouring fire-resisting cable | |
| CN219657917U (en) | High-strength glass fiber optical cable reinforcing core | |
| CN220439258U (en) | Polypropylene insulation medium-voltage fire-resistant environment-friendly cable | |
| CN205582565U (en) | Thermal -insulated type mineral insulation fireproof cable | |
| CN219105815U (en) | Low-smoke flame-retardant fire-resistant power cable | |
| CN215417613U (en) | Electric automatization engineering is with cable that fire prevention fire behaviour is good | |
| CN212342339U (en) | Fire-resistant cable | |
| CN217902774U (en) | Special high-temperature-resistant flexible power cable | |
| CN215933218U (en) | B1-grade low-voltage fireproof cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |