CN212276885U - Intelligent fire-resistant high-voltage cable - Google Patents
Intelligent fire-resistant high-voltage cable Download PDFInfo
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- CN212276885U CN212276885U CN202020907724.5U CN202020907724U CN212276885U CN 212276885 U CN212276885 U CN 212276885U CN 202020907724 U CN202020907724 U CN 202020907724U CN 212276885 U CN212276885 U CN 212276885U
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Abstract
The utility model discloses an intelligent fire-resistant high tension cable, include: the fireproof flame-retardant outer protective layer is made of fireproof flame-retardant materials and wraps the whole cable; the composite insulating layer is positioned inside the outer protective layer and used for insulating protection; the conductor is positioned inside the composite insulating layer and used for conducting electricity; and the temperature measuring optical fiber is positioned inside the conductor and used for measuring the temperature of the conductor. The utility model discloses fully considered the fire prevention fire behavior of cable on cable global design, utilized emerging ceramic polyolefin material, this material has low density, and fire-resistant fire behavior is good characteristics, under the circumstances that minimizing cable weight increases the volume, has promoted the holistic fire-resistant fire behavior of cable.
Description
Technical Field
The utility model relates to a high tension cable especially relates to an intelligent fire-resistant high tension cable.
Background
The existing high-voltage and ultrahigh-voltage power cable adopts a cross-linked polyethylene insulated power cable, the insulation of the cross-linked polyethylene insulated cable is polyethylene as a base material, the fireproof performance of the fireproof cable is low, only a fireproof test of 90 minutes at the temperature of 750 plus 800 ℃ can be passed, the temperature of a fire disaster is generally 800 plus 1000 ℃, in order to reach the fireproof operation temperature and longer electrified escape time at the temperature of the general fire disaster, the design technology of a cable fireproof structure and the technology of solving the extrusion of a ceramic polyolefin sheath are researched to ensure that when the fire disaster happens, the normal operation is continued for at least 2 hours at the high temperature of 1150 plus 1200 ℃, and the integrity of a line is ensured to be kept during the fire disaster. Meanwhile, the ultrahigh-voltage cable line grounding cable is expected to be capable of informationizing and intelligentizing and transmitting the temperature data of the cable in real time.
The optical fiber thermometry is a new technology developed in recent years and has gradually revealed some excellent characteristics, but it is not used to replace the traditional method, but supplements and improves the traditional thermometry method. The temperature measuring device is suitable for temperature measurement under a strong electromagnetic field and temperature measurement of high-voltage electrical appliances.
In the prior art, a high-voltage cable for measuring temperature by using an optical fiber exists, but the cable has poor fire resistance, and the time for realizing fire-resistant operation and power-on escape is short at the temperature of a common fire.
For example, a "500 kV temperature measuring cable" disclosed in chinese patent literature, publication No. CN204178794U, includes a split conductor, a conductor shielding layer, an insulating shielding layer, a semi-conductive buffer water-blocking layer, a metal sheath, a non-metal outer sheath, and an outer semi-conductive layer; the split conductor comprises a central sleeve positioned at the central part and a plurality of fan-shaped strand blocks uniformly distributed around the circumference of the central sleeve, and an inner temperature measuring optical cable is arranged in the central sleeve; at least three middle temperature measuring optical cables which are uniformly distributed in the circumferential direction are arranged between the semi-conductive buffer water-resistant layer and the metal sheath; an outer temperature measuring optical cable is arranged outside the outer semi-conducting layer and attached to the outer surface of the outer semi-conducting layer.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the poor problem of prior art's fire resistance, provide an intelligent fire-resistant high tension cable, when realizing cable intelligence temperature measurement, have good fire resistance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an intelligent fire-resistant high voltage cable comprising:
the fireproof flame-retardant outer protective layer is made of fireproof flame-retardant materials and wraps the whole cable;
the composite insulating layer is positioned inside the fireproof flame-retardant outer protective layer and used for insulating protection;
the conductor is positioned inside the composite insulating layer and used for conducting electricity;
and the temperature measuring optical fiber is positioned inside the conductor and used for measuring the temperature of the conductor.
As an emerging technology, optical fiber temperature measurement has outstanding advantages compared with traditional materials in the following scenes: temperature measurement under strong electromagnetic field and temperature measurement of high-voltage electric appliances. The optical fiber has no additional temperature rise caused by a conductive part and is not interfered by an electromagnetic field. The most typical application is the temperature measurement of high voltage transformer winding hot spots. The british electric energy research center starts to research the subject in a careful way from the middle of the 70 s of the 20 th century, firstly aims at fault diagnosis and forecast, and is later used for the application of computer electric energy management, and the system is shifted to safe overload operation so as to enable the system to be in an optimal power distribution state. Another type of application is in high voltage installations such as generators, high voltage switches, overload protection devices, even overhead power lines and underground cables.
This cable is outside for fire-resistant fire-retardant outer jacket, compares in the cable that the tradition has the temperature measurement function, the utility model discloses increased the fire-resistant fire-retardant outer jacket made by fire-resistant flame retardant material in the cable outside, improved the holistic fire-resistant flame retardant property of cable, it is long when the fire-resistant operation of cable in fire hazard environment is long and when the circular telegram of leaving for relevant staff is fleed.
Preferably, the fire-resistant flame-retardant outer protective layer is divided into three layers, which are sequentially from outside to inside: flame retardant coating, fire-resistant fiber layer and fire prevention flame retardant coating.
After a disaster happens, the cable is in a high-temperature environment, and the outermost layer is firstly flushed and exposed to the high-temperature environment. Therefore, the outermost layer is a flame-retardant layer, so that local fire of the cable can be prevented from being thick, and the fire cannot spontaneously spread along the cable. Once the outermost fire-retardant layer is destroyed, the cable is directly exposed to a high-temperature environment, and a fire-resistant material is needed to ensure the normal operation of the cable, and the fire-resistant fiber layer and the fire-resistant layer together resist high temperature, so that the internal structure of the cable is protected to be complete and the power transmission function of the cable is maintained within a certain time.
Preferably, the flame-retardant layer is a low-smoke halogen-free flame-retardant polyolefin layer.
The flame-retardant layer is a low-smoke halogen-free flame-retardant polyolefin layer, so that flame can be prevented from being extinguished automatically after a local cable is on fire, and the cable cannot be spread. The low smoke and zero halogen characteristics can also prevent secondary damage caused by toxic and harmful gases generated by combustion.
Preferably, the refractory fiber layer is a glass fiber layer.
The glass fiber has the characteristics of good insulation property, strong heat resistance and good corrosion resistance, and has a certain insulation effect when being used for increasing the fire resistance of the cable.
Preferably, the fireproof and fire-resistant layer is a ceramic fireproof and fire-resistant polyolefin oxygen-insulating layer.
The fireproof layer is a ceramic fireproof oxygen-insulating layer and is made of fireproof materials, and the fireproof material is tested to continue to normally operate at 1150-plus-1200 ℃ for at least 2 hours, so that the integrity of a line is kept in case of fire.
Preferably, the composite insulating layer sequentially comprises a metal layer, a buffer water-resistant layer, an insulating shielding layer, an insulating layer and a conductor shielding layer from outside to inside.
Because the utility model discloses an application scene is 110 kV's high voltage, and consequently the electric field of electrically conductive unit is releived and shielding function requires higherly, and the strong electric field that causes owing to the high pressure in outermost copper strips shielding layer can the shielded wire guarantees that the exterior structure who contains metallic impurity can not damage under the electric field effect. The semi-conductive buffering water-blocking tape layer on the secondary outer layer can effectively prevent the water tree effect which causes the cable damage. The insulation shielding layer and the conductor shielding layer play a role in relieving electric field filled gaps, and breakdown damage of the insulator caused by the gaps between the conductors and the insulation layer is prevented.
Preferably, the insulating layer is a crosslinked polyethylene insulating layer.
Because the utility model discloses an use the scene to be 110 kV's high voltage, the crosslinked cable is applicable to power frequency alternating voltage 500KV and in the following transmission and distribution lines. The vast majority of high voltage cables are insulated with crosslinked polyethylene.
Therefore, the utility model discloses following beneficial effect has: (1) the fireproof performance is good; (2) the cable temperature can be monitored in real time.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the cable comprises a conductor 2, a conductor shielding layer 3, an insulating layer-crosslinked polyethylene insulating layer 4, an insulating shielding layer 5, a buffering water-blocking layer 6, a metal layer 7, a fireproof flame-retardant layer-ceramic fireproof fire-resistant polyolefin oxygen-insulating layer 8, a fire-resistant fiber layer-glass fiber layer 9, a flame-retardant layer-low smoke halogen-free flame-retardant polyolefin layer 10, a temperature-measuring optical fiber 11, a fire-resistant flame-retardant outer protective layer 12 and a composite insulating layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Embodiment 1, as shown in fig. 1, an intelligent fire-resistant high-voltage cable includes:
the fireproof flame-retardant outer protective layer 11 is made of fireproof flame-retardant materials and wraps the whole cable;
the composite insulating layer 12 is positioned inside the fireproof flame-retardant outer protective layer 11 and used for insulating protection;
a conductor 1 located inside the composite insulating layer 12 for conducting electricity;
and the temperature measuring optical fiber 10 is positioned inside the conductor 1 and used for measuring the temperature of the conductor 1.
This cable is outside to have a temperature measurement function's cable for fire-resistant fire-retardant outer jacket 11 in the tradition, the utility model discloses increased the fire-resistant fire-retardant outer jacket 11 layers of being made by fire-resistant flame retardant material in the cable outside, improved the holistic fire-resistant flame retardant property of cable, it is long when the fire-resistant operation of cable in fire hazard environment is long and when the circular telegram of leaving for relevant staff flees.
Further, the fire-resistant flame-retardant outer sheath 11 is divided into three layers, which are from outside to inside in sequence: a flame retardant layer 9, a fire resistant fiber layer 8 and a fire resistant layer 7.
The fire-resistant flame-retardant layer 11 is composed of three layers with different functions, and the fire-retardant and fire-resistant functional characteristics of the fire-retardant layer are respectively realized.
Further, the flame retardant layer 9 is a low smoke halogen-free flame retardant polyolefin layer 9.
The flame-retardant layer 9 is a low-smoke halogen-free flame-retardant polyolefin layer 9, so that flame can be prevented from being extinguished by itself after a local cable is on fire, and the cable cannot be spread along the cable. The low smoke and zero halogen characteristics can also prevent secondary damage caused by toxic and harmful gases generated by combustion.
Further, the refractory fiber layer 8 is a glass fiber layer 8.
Further, the fireproof and fire-resistant layer 7 is a ceramic fireproof and fire-resistant polyolefin oxygen-barrier layer 7.
The glass fiber layer 8 and the ceramic fireproof and fireproof polyolefin oxygen-insulating layer 7 both have good fireproof performance, and after the low-smoke halogen-free fireproof polyolefin layer 9 is damaged, if the fire is still not controlled, the cable is still exposed in a high-temperature environment, and the glass fiber layer 8 and the ceramic fireproof and fireproof polyolefin oxygen-insulating layer 7 can continue to protect the interior of the cable.
Further, the composite insulating layer 12 comprises a metal layer 6, a buffer water-blocking layer 5, an insulating shielding layer 4, an insulating layer 3 and a conductor shielding layer 2 from outside to inside in sequence.
Further, the insulating layer 3 is a crosslinked polyethylene insulating layer 3.
The utility model discloses fully considered the fire prevention fire resistance of cable in cable global design, utilized emerging ceramic polyolefin material, this material has low density, and the characteristics that fire prevention fire resistance is good have promoted the holistic fire prevention fire resistance of cable under the circumstances that minimizing cable weight increases the volume. When a fire disaster happens, the temperature of the conductor can be measured in real time through the temperature measuring optical fiber 10 in the conductor 1, the overall performance and the operation condition of the cable are evaluated, and important data reference is provided for commanding and deploying in an emergency.
Claims (7)
1. An intelligent fire-resistant high-voltage cable, characterized by includes:
the fireproof flame-retardant outer protective layer is made of fireproof flame-retardant materials and wraps the whole cable;
the composite insulating layer is positioned inside the fireproof flame-retardant outer protective layer and used for insulating protection;
the conductor is positioned inside the composite insulating layer and used for conducting electricity;
and the temperature measuring optical fiber is positioned inside the conductor and used for measuring the temperature of the conductor.
2. The intelligent fire-resistant high-voltage cable according to claim 1, wherein the fire-resistant flame-retardant outer sheath comprises three layers, in order from outside to inside: flame retardant coating, fire-resistant fiber layer and fire prevention flame retardant coating.
3. An intelligent fire-resistant high-voltage cable according to claim 2, wherein the flame-retardant layer is a low-smoke halogen-free flame-retardant polyolefin layer.
4. An intelligent fire-resistant high-voltage cable according to claim 2, wherein the fire-resistant fiber layer is a glass fiber layer.
5. An intelligent fire-resistant high-voltage cable according to claim 2, wherein the fire-resistant layer is a ceramic fire-resistant polyolefin oxygen barrier.
6. The intelligent fire-resistant high-voltage cable according to any one of claims 1 to 5, wherein the composite insulating layer comprises a metal layer, a buffer water-resistant layer, an insulating shielding layer, an insulating layer and a conductor shielding layer in sequence from outside to inside.
7. An intelligent fire-resistant high-voltage cable according to claim 6, wherein the insulating layer is cross-linked polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020907724.5U CN212276885U (en) | 2020-05-26 | 2020-05-26 | Intelligent fire-resistant high-voltage cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020907724.5U CN212276885U (en) | 2020-05-26 | 2020-05-26 | Intelligent fire-resistant high-voltage cable |
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| CN212276885U true CN212276885U (en) | 2021-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115881359A (en) * | 2022-11-29 | 2023-03-31 | 人民电缆集团有限公司 | Environment-friendly flame-retardant fireproof intelligent cable |
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- 2020-05-26 CN CN202020907724.5U patent/CN212276885U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115881359A (en) * | 2022-11-29 | 2023-03-31 | 人民电缆集团有限公司 | Environment-friendly flame-retardant fireproof intelligent cable |
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