CN214505081U - Fire-resistant fireproof three-core power cable - Google Patents
Fire-resistant fireproof three-core power cable Download PDFInfo
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- CN214505081U CN214505081U CN202120442875.2U CN202120442875U CN214505081U CN 214505081 U CN214505081 U CN 214505081U CN 202120442875 U CN202120442875 U CN 202120442875U CN 214505081 U CN214505081 U CN 214505081U
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Abstract
The utility model discloses a fire-resistant and fireproof three-core power cable, which comprises an outer protective sleeve, an armor layer, a first fire-resistant layer, an inner protective sleeve, a fire-resistant filling layer, three cable cores arranged in the fire-resistant filling layer and drainage wires arranged in the cracks of the three cable cores, wherein the outer protective sleeve, the armor layer, the first fire-resistant layer, the inner protective sleeve, the fire-resistant filling layer, the three cable cores arranged in the fire-resistant filling layer and the drainage wires arranged in the cracks of the three cable cores are sequentially arranged from outside to inside; a first flame-retardant layer is arranged between the outer protective sleeve and the armor layer, a second flame-retardant layer is arranged between the armor layer and the first flame-retardant layer, a third flame-retardant layer is arranged between the first flame-retardant layer and the inner protective sleeve, and a fourth flame-retardant layer is arranged between the inner protective sleeve and the flame-retardant filling layer; the cable core is provided with a conductor, a conductor shielding layer, a conductor insulating layer, an insulating shielding layer, a semi-conductive buffer water-blocking tape, an explosion-proof shielding layer and a second fire-resistant layer from inside to outside. The structure that this scheme set up can be fine prevent that the sinle silk from taking place in the circuit, catching fire, under the high temperature condition, expend with heat and contract with cold, metal shielding produces the injury to insulation shield.
Description
Technical Field
The invention relates to the technical field of cable manufacturing, in particular to a fire-resistant fireproof three-core power cable.
Background
The cable can not guarantee normal power supply of the line after a fire disaster occurs, so that the elevator, the emergency lighting, the automatic alarm, the disaster relief system and the like can not work normally, and along with the improvement of fire fighting awareness of people, the conscious recognition of the importance of ensuring the power supply and distribution line to maintain power supply in a fire environment is adopted. The fireproof cable used in the current market has low fireproof performance, can only pass a fireproof test of 90 minutes at the temperature of 800 ℃ plus 750-.
Drawbacks and deficiencies of the background art: after the insulation shielding, the wire core is directly shielded by metal, so that the wire core expands after being heated, the metal wire or the metal belt can damage the insulation, short-circuit current is conducted under the action of the copper belt shielding, the copper belt shielding has small cross section, the copper wire is shielded, and the production speed is low; cabling only adopts common filling materials; only wrapping a ceramic silicon rubber belt or extruding an oxygen-isolating layer can not meet the requirement of a high fire resistance test, and after the fire resistance test, applying pressure breakdown or discharging amount exceeds the standard requirement; the oxygen-isolating layer with the flame-retardant and fire-resistant structure is added only after cabling, so that the transmission of external heat during combustion is difficult to be obstructed, the insulation deformation and yellowing are caused, the discharge is caused, and the requirements of long-time flame and high-temperature environment cannot be met; the cost of the silicon rubber tape wrapping material is high, and the production speed is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects and the insufficiency in the prior art, designing a fire-resistant super explosion-proof three-core cable for petroleum and petrochemical industry.
In order to achieve the technical purpose, the utility model provides a technical scheme is that a fire-resistant and fireproof three-core power cable comprises an outer protective sleeve, an armor layer, a first fire-resistant layer, an inner protective sleeve, a fire-resistant filling layer, three cable cores arranged in the fire-resistant filling layer and drainage wires arranged in the seams of the three cable cores, which are arranged from outside to inside in sequence; the fire-retardant sheath is characterized in that a first fire-retardant layer is arranged between the outer protective sheath and the armor layer, a second fire-retardant layer is arranged between the armor layer and the first fire-retardant layer, a third fire-retardant layer is arranged between the first fire-retardant layer and the inner protective sheath, and a fourth fire-retardant layer is arranged between the inner protective sheath and the fire-retardant filling layer.
Preferably, the cable core is provided with a conductor, a conductor shielding layer, a conductor insulating layer, an insulating shielding layer, a semi-conductive buffer water-blocking tape, an explosion-proof shielding layer and a second fireproof layer from inside to outside.
Preferably, the first flame-retardant layer, the second flame-retardant layer, the third flame-retardant layer and the fourth flame-retardant layer are all glass fiber tapes having a flame-retardant effect.
Preferably, the first fire-resistant layer and the second fire-resistant layer are both fire-resistant layers made of split-phase ceramic fire-resistant and fire-resistant polyolefin.
Preferably, the armor layer is a galvanized steel strip armor layer.
Preferably, the outer protective sleeve and the inner protective sleeve are both sheaths made of halogen-free low-smoke flame-retardant polyolefin materials with high flame-retardant property.
Preferably, the explosion-proof shielding layer is made of a copper strip.
Preferably, the flame-retardant filling layer is made of mineral paper ropes.
In the scheme, the fire-resistant fireproof three-core power cable is prepared from the following technical materials: wrapping a 2.0mm high-temperature buffer tape outside the insulating shielding layer; the wire core is prevented from being damaged by insulation shielding caused by expansion with heat and contraction with cold under the conditions of circuit ignition and high temperature; a ceramic halogen-free low-smoke flame-retardant polyolefin fire-resistant layer is extruded and wrapped in an item manner behind the metal shielding layer, and a mineral paper rope is adopted for filling in cabling and is wrapped with a glass fiber belt; during cabling, three-phase current is combined with a drainage wire together to play a role in conducting short-circuit current, copper wire shielding is avoided, and production efficiency is low; the inner sheath adopts a low-smoke halogen-free flame-retardant polyolefin sheath; then, a ceramic halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer and a glass fiber tape are extruded and wrapped, and a glass fiber tape is wrapped after steel tape armoring; the outer sheath adopts a low-smoke halogen-free flame-retardant polyolefin sheath.
The working principle and the effect are explained:
a 2.0mm high-temperature buffer belt is wound outside the insulation shield to protect the insulation wire core, so that the metal shield is prevented from damaging the insulation and the insulation shield under the high-temperature condition; the metal shielding layer adopts a copper strip split screen, and a drainage wire is crossed during cabling to play a role in conducting short-circuit current; after the metal shielding, the ceramic halogen-free low-smoke flame-retardant polyolefin fire-resistant layer is extruded in different items, so that the heat-insulating fire-resistant effect is achieved, and the insulated wire core is prevented from being deformed at high temperature; during cabling, mineral paper ropes are used for filling, so that the fireproof and heat-insulating effects are achieved, and the glass fiber belts are wrapped around the cabling, so that the flame-retardant effect is achieved; because the copper strip shielding section is small, the three-phase wire core and the drainage wire are twisted together to form a cable as a grounding wire to conduct short-circuit current; the ceramic halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer and the glass fiber tape are wrapped before the armor, after the outer protective layer burns, the incrustation speed is high, the incrustation is very hard and compact, the horizontal burning can be self-extinguished without delayed burning, the transmission of external heat to the inside of the cable is powerfully slowed down, the integrity of the oxygen-insulating layer can be better ensured by wrapping the glass fiber tape, and the transmission of heat is better prevented; the inner protective sleeve adopts a halogen-free low-smoke flame-retardant polyolefin sheath to play a role in high flame retardance and heat insulation; the outer protective sleeve adopts an environment-friendly low-smoke halogen-free flame-retardant polyolefin sheath, and plays a role in environment protection and high flame retardance.
The utility model has the advantages that: 1. the utility model relates to a fire-resistant three-core power cable wraps a 2.0mm high-temperature buffer belt outside the insulating shielding layer; the wire core is prevented from being damaged by insulation shielding caused by expansion with heat and contraction with cold under the conditions of circuit ignition and high temperature; 2. the metal band is adopted for shielding in terms, so that the production efficiency is improved, and in order to meet the requirement of short-circuit current, a drainage wire is twisted during cabling to conduct the short-circuit current; 3. the extruded ceramic halogen-free low-smoke flame-retardant polyolefin fireproof fire-resistant layer is added on the subentry wire core, so that the transmission of external heat during combustion is blocked, the spread of flame can be better prevented, the transmission of the external heat to the inside of the cable is effectively slowed down, the influence of external high temperature on the insulated wire core is delayed, and the cable can adapt to a severe environment and meet the requirement of super fire resistance and fire resistance compared with a common fireproof cable with a single-layer fire-resistant layer; 4. the ceramic halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer extruded before the armor has the effects of heat insulation, temperature reduction and incrustation after thermal decomposition, when a large amount of hydrated oxides in the material are heated, water molecules are evaporated, a large amount of heat can be absorbed, the temperature of the cable is reduced, the concentration of oxygen around the cable can be diluted by formed water vapor, flame and heat are prevented from spreading and transferring to the interior of the cable, on-site water pouring can be effectively resisted after the oxygen-insulating layer is incrusted, water is prevented from permeating to an insulating layer, and the normal operation of a circuit is maintained under the condition of fire; 5. the filling structure adopts the mineral paper rope, so that the flame-retardant cable is flame-retardant, has excellent heat-conducting property and is beneficial to heat dissipation of the cable; 6. all the materials are environment-friendly halogen-free low-smoke environment-friendly materials, and have no toxicity after combustion. The heat-insulating fireproof layer of the product has a soft structure and a small bending radius, is easy to install and lay and is convenient to use; 7. the ceramic halogen-free low-smoke flame-retardant polyolefin sheath material has the advantages of mature process, lower unit price compared with a ceramic fireproof fire-resistant composite belt, obvious market advantage, high extrusion molding speed, easy installation and laying and convenient use.
Drawings
Fig. 1 is the structure schematic diagram of a fire-resistant fireproof three-core power cable of the utility model.
The notation in the figure is: 1. conductor, 2, conductor shielding layer, 3, conductor insulating layer, 4, insulating shielding layer, 5, semiconduction buffering waterproofing area, 6, explosion-proof shielding layer, 7, second flame retardant coating, 8, fire-retardant filling layer, 9, fourth flame retardant coating, 10, interior protective sheath, 11, the fire-retardant layer of third, 12, first flame retardant coating, 13, the fire-retardant layer of second, 14, armor, 15, first fire-retardant layer, 16 outer protective sheath, 17, drainage wire.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail with reference to the accompanying drawings and examples, it should be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and does not limit the protection scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a schematic structural diagram of a fire-resistant fireproof three-core power cable includes an outer protective sleeve 16, an armor layer 14, a first fire-resistant layer 12, an inner protective sleeve 10, a fire-resistant filling layer 8, three cable cores arranged in the fire-resistant filling layer, and drainage wires 17 arranged in seams of the three cable cores, which are sequentially arranged from outside to inside; a first flame-retardant layer 15 is arranged between the outer protective sleeve and the armor layer, a second flame-retardant layer 13 is arranged between the armor layer and the first flame-retardant layer, a third flame-retardant layer 11 is arranged between the first flame-retardant layer and the inner protective sleeve, and a fourth flame-retardant layer 9 is arranged between the inner protective sleeve and the flame-retardant filling layer; the cable core is provided with a conductor 1, a conductor shielding layer 2, a conductor insulating layer 3, an insulating shielding layer 4, a semi-conductive buffer water-blocking tape 5, an explosion-proof shielding layer 6 and a second fire-resistant layer 7 from inside to outside; the first flame-retardant layer, the second flame-retardant layer, the third flame-retardant layer and the fourth flame-retardant layer are all glass fiber belts with flame-retardant effects; the first fire-resistant layer and the second fire-resistant layer are both fire-resistant layers made of split-phase ceramic fire-resistant and fire-resistant polyolefin; the armor layer is a galvanized steel strip armor layer; the outer protective sleeve and the inner protective sleeve are both sheaths made of halogen-free low-smoke flame-retardant polyolefin materials with high flame-retardant property; the explosion-proof shielding layer is made of a copper strip; the flame-retardant filling layer is made of mineral paper ropes.
In this embodiment, the fire-resistant and fireproof three-core power cable is made of the following technical materials: wrapping a 2.0mm high-temperature buffer tape outside the insulating shielding layer; the wire core is prevented from being damaged by insulation shielding caused by expansion with heat and contraction with cold under the conditions of circuit ignition and high temperature; a ceramic halogen-free low-smoke flame-retardant polyolefin fire-resistant layer is extruded and wrapped in an item manner behind the metal shielding layer, and a mineral paper rope is adopted for filling in cabling and is wrapped with a glass fiber belt; during cabling, three-phase current is combined with a drainage wire together to play a role in conducting short-circuit current, copper wire shielding is avoided, and production efficiency is low; the inner sheath adopts a low-smoke halogen-free flame-retardant polyolefin sheath; then, a ceramic halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer and a glass fiber tape are extruded and wrapped, and a glass fiber tape is wrapped after steel tape armoring; the outer sheath adopts a low-smoke halogen-free flame-retardant polyolefin sheath.
The working principle and the effect are explained as follows:
in the embodiment, a layer of 2.0mm high-temperature buffer tape is wound outside the insulation shield to protect the insulation wire core, so that the metal shield is prevented from damaging the insulation and the insulation shield under the high-temperature condition; the metal shielding layer adopts a copper strip split screen, and a drainage wire is crossed during cabling to play a role in conducting short-circuit current; after the metal shielding, the ceramic halogen-free low-smoke flame-retardant polyolefin fire-resistant layer is extruded in different items, so that the heat-insulating fire-resistant effect is achieved, and the insulated wire core is prevented from being deformed at high temperature; during cabling, mineral paper ropes are used for filling, so that the fireproof and heat-insulating effects are achieved, and the glass fiber belts are wrapped around the cabling, so that the flame-retardant effect is achieved; because the copper strip shielding section is small, the three-phase wire core and the drainage wire are twisted together to form a cable as a grounding wire to conduct short-circuit current; the ceramic halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer and the glass fiber tape are wrapped before the armor, after the outer protective layer burns, the incrustation speed is high, the incrustation is very hard and compact, the horizontal burning can be self-extinguished without delayed burning, the transmission of external heat to the inside of the cable is powerfully slowed down, the integrity of the oxygen-insulating layer can be better ensured by wrapping the glass fiber tape, and the transmission of heat is better prevented; the inner protective sleeve adopts a halogen-free low-smoke flame-retardant polyolefin sheath to play a role in high flame retardance and heat insulation; the outer protective sleeve adopts an environment-friendly low-smoke halogen-free flame-retardant polyolefin sheath, and plays a role in environment protection and high flame retardance.
The above-mentioned embodiment does the utility model relates to a fire-resistant fire prevention three-core power cable's preferred embodiment not limit with this the utility model discloses a concrete implementation scope, the utility model discloses a scope includes and is not limited to this embodiment, and the all equivalent changes that do according to the utility model discloses a shape, structure are all in the protection scope of the utility model.
Claims (8)
1. The utility model provides a fire-resistant fire prevention three-core power cable which characterized in that: the cable core comprises an outer protective sleeve, an armor layer, a first fire-resistant layer, an inner protective sleeve, a fire-resistant filling layer, three cable cores arranged in the fire-resistant filling layer and drainage wires arranged in cracks of the three cable cores, wherein the outer protective sleeve, the armor layer, the first fire-resistant layer, the inner protective sleeve, the fire-resistant filling layer, the three cable cores and the drainage wires are sequentially arranged from outside to inside; the fire-retardant sheath is characterized in that a first fire-retardant layer is arranged between the outer protective sheath and the armor layer, a second fire-retardant layer is arranged between the armor layer and the first fire-retardant layer, a third fire-retardant layer is arranged between the first fire-retardant layer and the inner protective sheath, and a fourth fire-retardant layer is arranged between the inner protective sheath and the fire-retardant filling layer.
2. The fire-resistant and fire-proof three-core power cable according to claim 1, wherein:
the cable core is provided with a conductor, a conductor shielding layer, a conductor insulating layer, an insulating shielding layer, a semi-conductive buffer water-blocking tape, an explosion-proof shielding layer and a second fire-resistant layer from inside to outside.
3. A fire-resistant three-core power cable according to claim 1 or 2, characterized in that:
the first flame-retardant layer, the second flame-retardant layer, the third flame-retardant layer and the fourth flame-retardant layer are all glass fiber belts with flame-retardant effects.
4. The fire-resistant and fire-proof three-core power cable according to claim 2, wherein:
the first fire-resistant layer and the second fire-resistant layer are both fire-resistant layers made of split-phase ceramic fireproof fire-resistant polyolefin.
5. A fire-resistant three-core power cable according to claim 1 or 2, characterized in that:
the armor layer is a galvanized steel strip armor layer.
6. A fire-resistant three-core power cable according to claim 1 or 2, characterized in that:
the outer protective sleeve and the inner protective sleeve are both sheaths made of halogen-free low-smoke flame-retardant polyolefin materials with high flame-retardant property.
7. The fire-resistant and fire-proof three-core power cable according to claim 2, wherein:
the explosion-proof shielding layer is made of a copper strip.
8. A fire-resistant three-core power cable according to claim 1 or 2, characterized in that:
the flame-retardant filling layer is made of mineral paper ropes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120442875.2U CN214505081U (en) | 2021-03-01 | 2021-03-01 | Fire-resistant fireproof three-core power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120442875.2U CN214505081U (en) | 2021-03-01 | 2021-03-01 | Fire-resistant fireproof three-core power cable |
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| CN214505081U true CN214505081U (en) | 2021-10-26 |
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| CN202120442875.2U Active CN214505081U (en) | 2021-03-01 | 2021-03-01 | Fire-resistant fireproof three-core power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114388189A (en) * | 2022-01-14 | 2022-04-22 | 夏雨辰 | Composite cable with good flame-retardant effect |
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2021
- 2021-03-01 CN CN202120442875.2U patent/CN214505081U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114388189A (en) * | 2022-01-14 | 2022-04-22 | 夏雨辰 | Composite cable with good flame-retardant effect |
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