CN210325246U - Fireproof cable for monitoring - Google Patents
Fireproof cable for monitoring Download PDFInfo
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- CN210325246U CN210325246U CN201920756666.8U CN201920756666U CN210325246U CN 210325246 U CN210325246 U CN 210325246U CN 201920756666 U CN201920756666 U CN 201920756666U CN 210325246 U CN210325246 U CN 210325246U
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Abstract
The utility model relates to a be used for keeping watch on type fireproof cable, the cable includes respectively from inlayer to skin in proper order: the temperature measuring optical cable comprises a temperature measuring optical cable, an insulating cable core, a cable core flame-retardant belting layer, a flame-retardant environment-friendly inner protection layer and a flame-retardant environment-friendly outer protection layer; the insulation cable core comprises a soft stranded conductor and a composite insulation layer wrapped outside the soft stranded conductor; insulating fillers are filled among the temperature measuring optical cable, the insulating cable core and the cable core flame-retardant belting layer. The utility model really realizes the improvement of the flame-retardant and fire-resistant performance of the cable, reduces the reactive loss of the cable and increases the current-carrying capacity of the cable; the special multi-level monitoring structure can monitor the running condition of the cable under the high-load condition in real time on line, and can send out early warning information in time when being influenced by the outside, thereby avoiding great property loss.
Description
Technical Field
The utility model relates to a be arranged in keeping watch on type fireproof cable, mainly used rated voltage 0.6/1kV and following transmission and distribution lines, it uses to carry the electric energy. The voltage regulator can also be used as a control signal in a circuit for controlling the rated voltage of 450/750V or below. Belongs to the high and new technical field of cables.
Background
High-rise buildings in the modern society become important places for daily work and life of many citizens, but fire extinguishing of the high-rise buildings becomes an international fire-fighting problem. The traditional cables (including flame-retardant, low-smoke low-halogen, low-smoke halogen-free and corresponding fire-resistant cables) can not completely meet the fire-proof requirements when the cables are on fire, burned or damaged due to long-term overload insulation. The smoke generated when the polyvinyl chloride insulated cable is burnt contains a large amount of CO and CO2And chlorides, and other cable fumes may also contain bromides, fluorides and hydrogen sulfide, which are very harmful to humans. Therefore, a large number of cables with higher fire-proof performance are required to be equipped in the market so as to meet the power transmission requirement of the area with high fire-fighting requirement.
The more fireproof cables used in the current market are mineral insulated cables. The copper conductor core, the copper outer sheath and the insulating layer of the traditional mineral insulated cable are compact and integrated, and the mineral insulated cable is complex in production process, expensive in price, high in hardness and not easy to bend during construction, so that the length of ordering must be quite accurate in terms of cost reduction and construction process. Meanwhile, the sectional area of the cable is larger than 25mm2Only can be produced into a single core, and the length of the cable is limited by the maximum delivery length, so that the mineral insulated cable is not easy to form mass production and has higher installation difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model provides a mineral insulation flexible fireproof cable, the performance that can overcome traditional cable on the market is poor, can overcome the production difficulty of current mineral insulation cable again. Realizing large-length and large-size production. The product is softer, and installation and laying are convenient, and the intermediate head is less, and product performance can pass through BS6387 standard inspection. Can completely meet the market demand.
The purpose of the utility model is realized like this:
a fire-resistant cable for monitoring, the cable comprising, in order from an inner layer to an outer layer: the temperature measuring optical cable comprises a temperature measuring optical cable, an insulating cable core, a cable core flame-retardant belting layer, a flame-retardant environment-friendly inner protection layer and a flame-retardant environment-friendly outer protection layer;
the insulation cable core comprises a soft stranded conductor and a composite insulation layer wrapped outside the soft stranded conductor;
insulating fillers are filled among the temperature measuring optical cable, the insulating cable core and the cable core flame-retardant belting layer.
And an early warning reinforcing element for monitoring is arranged between the flame-retardant environment-friendly inner protection layer and the flame-retardant environment-friendly outer protection layer.
The flexible stranded conductor adopts a type 2 or type 5 conductor.
The composite insulating layer is formed by combining a mineral insulating wrapping layer and a polymer insulating layer; the wrapping layer number of the multilayer mineral insulation wrapping layer is determined by the actual thickness of the wrapping tape and the rated voltage grade; the mineral insulation lapping layer adopts a plurality of layers of mineral insulation composite tapes; the overlapping rate of each layer of the mineral insulation composite belt is not less than 30%.
The temperature measuring optical cable mainly comprises a temperature sensing optical fiber, a protective layer, an anti-electromagnetic interference reinforced layer and an outer protective layer. The optical fiber type is multimode, and the mechanical property and the optical property of the optical fiber type meet the requirements of IEC60793 optical fiber standard. The real-time operation condition of the cable core is reflected by monitoring the internal temperature of the cable during operation on line.
The temperature measuring optical cable and the insulated cable core are twisted, the twisting pitch is not more than 25 times of the outer diameter of the cable, and the insulating filler is made of non-hygroscopic environment-friendly materials.
The flame-retardant wrapping tape layer of the cable core is formed by overlapping and wrapping flame-retardant wrapping tapes, the flame-retardant wrapping tapes are formed by overlapping and wrapping two layers, and the wrapping and covering rate is not less than 30 percent
The flame-retardant environment-friendly inner protection layer is formed by extruding flame-retardant, halogen-free, non-toxic and low-smoke environment-friendly plastics.
The early warning reinforcing element of control usefulness, it adopts strenghthened type copper wire structure, and every cable is with two, and it is located the cable both sides respectively, and the spiral winding, its copper wire diameter is not less than 1 mm. Through being connected with equipment, when guaranteeing that the cable jacket is defective, can discover in the very first time. Avoiding great property loss.
The flame-retardant environment-friendly outer protective layer is generally made of halogen-free low-smoke flame-retardant environment-friendly materials, and can also be made of environment-friendly materials with other characteristics such as rat and ant resistance, ultraviolet resistance, oil resistance and the like according to the use environment and the requirements of customers. Preferably, polyolefins are used.
The utility model relates to a be used for keeping watch on type fireproof cable for replace ordinary fire-retardant fire resisting cable, the conductor of cable adopts 2 nd, 5 th class conductor in GB/T3956-; to the condition such as conflagration that probably takes place, the cable not only has fire-resistant fire-retardant insulating composite construction, more has high fire-retardant band filling layer, has increased one deck isolation layer (protective layer) on this basis especially, and this isolation layer can adopt the material of steamed low fire-retardant environmental protection of cigarette of nothing, and furthest's messenger's cable continues the steady operation for a certain time under the condition of the conflagration of taking place to give people the chance of fleing. The insulating composite structure, the inner protection layer and the outer protection layer of the cable are all made of environment-friendly materials, and when abnormal conditions occur, a large amount of pollutants cannot be generated, so that the characteristics of safety and environment friendliness are really realized. Meanwhile, the adopted unique multi-level monitoring structure can monitor the running condition of the cable under the high-load condition in real time on line, and can send out early warning information in time when being influenced by the outside, thereby avoiding great property loss.
The cable has extremely high flame-retardant, fire-resistant and environment-friendly performances, and is suitable for fire-fighting equipment, fire-proof elevators, lighting systems and the like in various important buildings or intensive personnel places; the method is suitable for places with high temperature, such as steel plants, smelting plants, glass plants and the like; is suitable for important occasions with flammability and explosiveness, such as: petrochemical, coal mine, etc.; is suitable for places with higher environmental protection requirements, such as: hospitals, food plants, etc.
Compared with a common flame-retardant fire-resistant cable, the cable can bear the working high temperature of up to 125 ℃ on the basis of keeping the original performance. The reactive loss of the cable is reduced, the energy waste can be greatly reduced after long-term use, the cost is saved, and the cable has great economic benefit. The special monitoring function of the cable can monitor the problems in the operation process of the cable, and the design of the environment-friendly flame-retardant structure of the cable can further improve the safety guarantee of a using system.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in figure 1, the flexible stranded conductor 1 adopts the conductor structures of class 2 and class 5 in GB/T3956-2008, so that the flexible stranded conductor has a wider application range and can meet the requirements of different occasions. The cable category 5 conductor is thinner, more flexible, longer in flex life and easier to lay than the category 2 monofilament. For the 5 th class conductor, the small section is generally formed by one-time bunching, and the large section is generally produced by a production process of firstly performing strand bunching and then performing strand compound twisting. After the compound twisting is finished, a layer of polyester tape can be added and wrapped to prevent the wire core from loosening.
The composite insulating layer 2 can be divided into a fire-resistant mica tape and a ceramic silicon rubber tape according to different mineral insulating materials; according to different temperature resistance grades of the high polymer insulating material, the high polymer insulating material can be divided into cross-linked polyethylene insulation, halogen-free low-smoke flame-retardant polyolefin insulation and the like. Corresponding mineral insulating materials and polymer plastics are adopted according to different use environment temperatures.
The temperature measuring optical cable 3 for on-line monitoring mainly comprises a temperature sensing optical fiber, a protective layer, an anti-electromagnetic interference reinforced layer and an outer protective layer. The optical fiber type is multimode, and the mechanical property and the optical property of the optical fiber type meet the requirements of IEC60793 optical fiber standard. The real-time operation condition of the cable core is reflected by monitoring the internal temperature of the cable during operation on line.
The insulated cable core + temperature measuring cable multi-cable core structure 4 shown in fig. 1: the temperature measuring cable is formed by arranging and twisting a plurality of insulating cable cores and a proper temperature measuring cable, wherein the temperature measuring cable is contacted with the cable cores as far as possible, and the twisting pitch is not more than 25 times of the outer diameter of the cable. The composite insulating layer 2, the temperature measuring optical cable 3 for online monitoring and the cable core flame-retardant belting layer 5 are filled with round and compact materials and are usually formed by flame-retardant filling ropes or yarns; according to different use characteristics and conditions of the cable, water-blocking filling ropes or yarns can be adopted, and when the water-blocking filling ropes or yarns are adopted, the longitudinal water-proof and moisture-proof effects can be achieved in the use process of the cable. .
The cable core flame-retardant belting layer 5 is formed by lapping high flame-retardant belts with oxygen index larger than 50 in a double-layer overlapping mode, and the lapping rate is not less than 30%.
The flame-retardant environment-friendly inner protection layer 6 is formed by extruding flame-retardant, halogen-free, non-toxic and low-smoke environment-friendly plastics.
The early warning reinforcing element 7 for monitoring is composed of two sections with the cross section not less than 1mm2The reinforced soft copper wire is spirally wound on the surface of the inner protection layer 6, so that whether the cable outer sheath is damaged or defective can be monitored in real time.
The flame-retardant environment-friendly outer protective layer 8 is made of extruded halogen-free low-smoke flame-retardant environment-friendly materials, and can also be made of environment-friendly materials with other characteristics such as rat and ant resistance, ultraviolet resistance, oil resistance and the like according to the use environment and the requirements of customers. The reliability and the safety of the cable are greatly improved.
Design and application of temperature measurement optical cable 3, the multi-cable core structure of insulating cable core + temperature measurement optical cable 4, the early warning strengthening element 7 and the fire-retardant environmental protection outer jacket 8 of control usefulness that soft transposition conductor 1, composite insulation layer 2, on-line monitoring used are the utility model discloses a key. The application of the flexible stranded conductor 1 can improve the bending times and the service life of the cable; the composite insulating layer 2 can reduce reactive power consumption in the using process, improve the current-carrying capacity of the cable and improve the flame-retardant and fire-resistant performance of the cable; the temperature measuring optical cable 3 for on-line monitoring can monitor the operation condition inside the cable in real time and on line, and avoid larger loss caused by overhigh load; the insulated cable core and the temperature measuring optical cable multi-cable core structure 4 meet different use environments and can protect the insulated cable core from being influenced by external force; the early warning reinforcing element 7 for monitoring can monitor the influence of an external environment on the cable in real time on line and can monitor whether the outer sheath of the cable has a damage defect; the flame-retardant environment-friendly outer protective layer (8) protects the cable from external influence.
The overall performance of the cable is improved by 20-30% compared with that of a common flame-retardant fire-resistant cable, the defects of the existing mineral insulated cable can be overcome, the large-length and large-size production is realized, the product is softer, the installation and the laying are convenient, the number of intermediate joints is small, and the like. More importantly, the following can be verified by the BS6387 standard: the material can bear 3 hours of combustion at 950 ℃, can be combusted for 15min at 650 ℃ and then sprayed for 15min while being combusted, and can meet the mechanical impact of 30 times within 15min at 950 ℃. Meanwhile, the adopted unique multi-level monitoring structure can monitor the running condition of the cable under the high-load condition in real time on line, and can send out early warning information in time when being influenced by the outside, thereby avoiding great property loss. Has higher practical economic value.
Claims (10)
1. A fire-resistant cable for surveillance, comprising:
the cable comprises the following components from the inner layer to the outer layer in sequence respectively: the temperature measuring optical cable comprises a temperature measuring optical cable, an insulating cable core, a cable core flame-retardant belting layer, a flame-retardant environment-friendly inner protection layer and a flame-retardant environment-friendly outer protection layer;
the insulation cable core comprises a soft stranded conductor and a composite insulation layer wrapped outside the soft stranded conductor;
insulating fillers are filled among the temperature measuring optical cable, the insulating cable core and the cable core flame-retardant belting layer.
2. The flameproof cable for monitoring according to claim 1, wherein: and an early warning reinforcing element for monitoring is arranged between the flame-retardant environment-friendly inner protection layer and the flame-retardant environment-friendly outer protection layer.
3. The flameproof cable for monitoring according to claim 1, wherein: the flexible stranded conductor adopts a type 2 or type 5 conductor.
4. The flameproof cable for monitoring according to claim 1, wherein: the composite insulating layer is formed by combining a mineral insulating wrapping layer and a polymer insulating layer; the mineral insulation lapping layer adopts a plurality of layers of mineral insulation composite tapes; the overlapping rate of each layer of the mineral insulation composite belt is not less than 30%.
5. The flameproof cable for monitoring according to claim 1, wherein: the temperature measuring optical cable is of a multimode type, and the mechanical property and the optical property of the temperature measuring optical cable meet the requirements of IEC60793 optical fiber standards.
6. The flameproof cable for monitoring according to claim 1, wherein: the temperature measuring optical cable and the insulated cable core are twisted, the twisting pitch is not more than 25 times of the outer diameter of the cable, and the insulating filler is made of non-hygroscopic environment-friendly materials.
7. The flameproof cable for monitoring according to claim 1, wherein: the cable core flame-retardant belting layer is formed by overlapping and lapping flame-retardant belting, and the lapping and covering rate is not less than 30%.
8. The flameproof cable for monitoring according to claim 1, wherein: the flame-retardant environment-friendly inner protection layer is formed by extruding flame-retardant, halogen-free, non-toxic and low-smoke environment-friendly plastics.
9. The flameproof cable for monitoring according to claim 2, wherein: the early warning reinforcing element of control usefulness, it adopts strenghthened type copper wire structure, and every cable is with two, and it is located the cable both sides respectively, and the spiral winding, its copper wire diameter is not less than 1 mm.
10. The flameproof cable for monitoring according to claim 1, wherein: the flame-retardant environment-friendly outer protective layer is made of polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756666.8U CN210325246U (en) | 2019-05-20 | 2019-05-20 | Fireproof cable for monitoring |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920756666.8U CN210325246U (en) | 2019-05-20 | 2019-05-20 | Fireproof cable for monitoring |
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| CN210325246U true CN210325246U (en) | 2020-04-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048249A (en) * | 2019-05-20 | 2020-04-21 | 杭州鸿雁线缆有限公司 | Fireproof cable for monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048249A (en) * | 2019-05-20 | 2020-04-21 | 杭州鸿雁线缆有限公司 | Fireproof cable for monitoring |
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