CN215933216U - High-performance B1-grade flame-retardant 35kV looped network power cable - Google Patents
High-performance B1-grade flame-retardant 35kV looped network power cable Download PDFInfo
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- CN215933216U CN215933216U CN202120808073.9U CN202120808073U CN215933216U CN 215933216 U CN215933216 U CN 215933216U CN 202120808073 U CN202120808073 U CN 202120808073U CN 215933216 U CN215933216 U CN 215933216U
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Abstract
The utility model discloses a high-performance B1-grade flame-retardant 35kV looped network power cable which comprises a conductor and a first high-flame-retardant wrapping tape layer arranged outside the conductor, wherein a conductor shielding layer, an insulating shielding layer, a semi-conductive wrapping tape layer, a copper wire and copper strip shielding layer, a second high-flame-retardant wrapping tape layer, a longitudinally-wrapped metal tape layer, a high-flame-retardant oxygen-isolating layer and a brass strip armor layer are sequentially arranged between the conductor and the first high-flame-retardant wrapping tape layer from inside to outside, and an environment-friendly rat-proof, termite-proof, crack-resistant, high-flame-retardant and non-dripping low-smoke halogen-free polyolefin sheath layer is further wrapped outside the first high-flame-retardant wrapping tape layer. According to the utility model, the high-flame-retardant alkali-free glass fiber tape is wrapped on the wire core, so that the insulation protection effect is improved, and the high-flame-retardant polyolefin is extruded on the oxygen isolation layer, so that a hard shell can be formed when the cable is burnt, and the normal operation inside the cable is ensured; by adopting the low-smoke halogen-free flame-retardant sheath material with good crusting performance, high flame retardance and high physical and mechanical properties, the flame retardance of the cable can be ensured, and the anti-cracking performance of the cable can also be ensured.
Description
Technical Field
The utility model relates to the technical field of urban rail transit engineering cables, in particular to a high-performance B1-grade flame-retardant 35kV looped network power cable.
Background
At present, a B1-grade cable with combustion performance belongs to a flame-retardant cable, and a B1-grade cable with combustion performance is mainly used in places with dense population and places needing special protection, such as subways, airports, markets, hospitals, kindergartens, high-rise buildings and the like in an engineering construction fireproof system. In the fire-proof regulations of engineering construction in these places, cables with higher flame-retardant level are required to be adopted.
However, the residues of the burned materials of the B1-grade flame-retardant cable are very brittle and easily fall off after a little collision or vibration, so that flame or temperature cannot be effectively prevented from being burned and transmitted to the inside, and the insulating layer with poor flame-retardant property of the inner layer cannot be protected, so that the insulating layer material is burned (because most of the insulating material is organic matter which is easily burned), and finally the whole cable is continuously burned, a large amount of heat and smoke are released, and the fire behavior is further aggravated, and the fire safety cannot be guaranteed. In addition, the flame retardant material is added with excessive flame retardant, so that the original physical and mechanical properties of the material are influenced, and the anti-cracking performance of the finished cable cannot be guaranteed.
Therefore, it is necessary to develop a novel high-performance B1-grade flame-retardant 35kV ring network cable suitable for a rail transit subway main line ring network.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-performance B1-grade flame-retardant 35kV looped network power cable, which can ensure the flame retardant performance of the cable, can also ensure the anti-cracking performance of the cable and meets the requirement of water immersion.
The technical scheme adopted by the utility model is as follows:
the utility model provides a fire-retardant 35kV looped netowrk power cable of high performance B1 level, includes the conductor and sets up at external first high fire-retardant band layer, still has set gradually conductor shield, insulating layer, insulating shield, semiconduction band layer, copper wire copper strips shielding layer, second high fire-retardant band layer, indulges package metal tape layer, high fire-retardant oxygen barrier layer and brass strips armor by inside to outside between the two, first high fire-retardant band layer outside still the cladding be provided with the environmental protection rat-proof anti-termite anti-cracking high fire-retardant no drip low smoke and zero halogen polyolefin restrictive coating.
The conductor core of the conductor is a copper core, and a compressed and twisted round conductor structure is adopted to reduce the gaps of the conductor and avoid the penetration of a conductor shielding material.
The conductor shielding layer, the insulating layer and the insulating shielding layer are formed by dry three-layer co-extrusion in one piece, the insulating eccentricity of the conductor shielding layer, the insulating layer and the insulating shielding layer is less than 10%, and the three-layer co-extruded conductor shielding layer, the insulating layer and the insulating shielding layer are used for homogenizing an electric field, so that the service life of a finished cable is prolonged, and the electric energy transmission performance of the finished cable is improved.
The copper wire and copper strip shielding layer adopts a copper wire sparse winding layer and a copper strip reverse gap winding layer and is used for improving the bearing capacity of short-circuit current.
The high-flame-retardant wrapping tape layer adopts a high-flame-retardant low-smoke halogen-free glass fiber tape and is used for improving the safety performance of the cable.
The longitudinal metal-clad belt layer and the high-flame-retardant oxygen-isolating layer comprise a waterproof fire-isolating layer which is formed by a longitudinal aluminum-plastic composite belt layer and a high-flame-retardant oxygen-isolating layer which are sequentially arranged from the inside of the cable outwards and jointly form the cable.
The high flame-retardant oxygen barrier layer adopt high flame-retardant and low smoke and zero halogen flame retardant material with good crusting performance for crusting hard shells when the cable burns, preventing flame or high temperature from entering the inside of the cable to destroy the insulating layer, and ensuring the normal operation of the inside of the cable.
The armor layer adopts a single-layer overlapped wrapped hard brass band layer.
According to the utility model, the high-flame-retardant alkali-free glass fiber tape is wrapped on the wire core, so that the insulation protection effect is improved, the high-flame-retardant polyolefin is extruded on the oxygen isolation layer, so that the cable can be formed into a hard shell during combustion, flame or high temperature is prevented from entering the cable to damage the insulation layer, and the normal operation of the cable is ensured; by adopting the copper wire sparse winding shielding, the stress generated during bending is prevented from damaging the insulation, and the insulation performance is ensured; the outer sheath and the armor layer are isolated by wrapping a layer of high-flame-retardant alkali-free glass fiber tape after armor, so that the damage of the armor layer to the outer sheath is reduced, and the cracking resistance of the cable is greatly improved; by adopting the low-smoke halogen-free flame-retardant sheath material with good crusting performance, high flame retardance and high physical and mechanical properties, the flame retardance of the cable can be ensured, and the anti-cracking performance of the cable can also be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic of the structure of the present invention.
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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figure 1, the anti-termite anti-cracking high-flame-retardant and anti-dripping low-smoke halogen-free polyolefin sheath comprises a conductor and a first high-flame-retardant wrapping tape layer arranged outside the conductor, wherein a conductor shielding layer, an insulating shielding layer, a semi-conductive wrapping tape layer, a copper wire copper strip shielding layer, a second high-flame-retardant wrapping tape layer, a longitudinal metal wrapping tape layer, a high-flame-retardant oxygen barrier layer and a brass strip armor layer are sequentially arranged between the conductor and the first high-flame-retardant wrapping tape layer from inside to outside, and an environment-friendly rat-proof anti-termite anti-cracking high-flame-retardant and anti-dripping low-smoke halogen-free polyolefin sheath layer is further coated outside the first high-flame-retardant wrapping tape layer.
Preferably, the conductor core of the conductor is a copper core, and a compact stranded round conductor structure is adopted to reduce the gap of the conductor and avoid the penetration of the conductor shielding material.
Preferably, the conductor shielding layer, the insulating layer and the insulation shielding layer are formed by dry three-layer co-extrusion in an integrated manner, the insulation eccentricity of the conductor shielding layer, the insulating layer and the insulation shielding layer is less than 10%, and the three-layer co-extruded conductor shielding layer, the insulating layer and the insulation shielding layer are used for homogenizing an electric field, so that the service life of a finished cable is prolonged, and the electric energy transmission performance of the finished cable is improved.
Preferably, the copper wire and copper strip shielding layer adopts a copper wire sparse winding layer and a copper strip reverse gap winding layer, and is used for improving the bearing capacity of the short-circuit current.
Preferably, the high-flame-retardant wrapping tape layer adopts a high-flame-retardant low-smoke halogen-free glass fiber tape, so that the safety performance of the cable is improved.
Preferably, the longitudinally-wrapped metal tape layer and the high-flame-retardant oxygen-barrier layer comprise a waterproof fire-barrier layer of the cable, which is formed by a longitudinally-wrapped aluminum-plastic composite tape layer and a high-flame-retardant oxygen-barrier layer which are sequentially arranged from the inside of the cable outwards.
Preferably, the high-flame-retardant oxygen-insulating layer, namely the high-flame-retardant polyolefin extruded oxygen-insulating layer, is made of a low-smoke halogen-free flame-retardant material with high flame retardance and good crusting performance, and is used for crusting a hard shell when the cable is burnt, preventing flame or high temperature from entering the cable to damage the insulating layer and ensuring the normal operation of the interior of the cable.
A high performance B1 grade flame retardant 35kV ring network cable, as shown in fig. 1 comprising: the cable comprises a conductor 1, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4, a semi-conductive belting layer 5, a copper wire and copper strip shielding layer 6, a second high-flame-retardant belting layer 7, a longitudinal metal belting layer 8, a high-flame-retardant oxygen-isolating layer 9, a brass strip armor layer 10, a first high-flame-retardant belting layer 11, an environment-friendly rat-proof, termite-proof, crack-resistant, high-flame-retardant and no-dripping low-smoke halogen-free polyolefin sheath layer 12.
The conductor core is a copper core, and a compressed and twisted round conductor structure is adopted, so that gaps of the conductor are reduced, and the penetration of a conductor shielding material is avoided. The cable comprises a cable conductor and is characterized in that a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially arranged outside the cable conductor, the conductor shielding layer, the insulating layer and the insulating shielding layer are formed by dry three-layer co-extrusion and integrated molding, and the insulating eccentricity can reach below 10%. The three-layer co-extruded conductor shielding layer, the insulating layer and the insulating shielding layer play a good role in homogenizing an electric field, and the service life and the electric energy transmission performance of the finished cable are prolonged. The copper wire and copper strip shielding layer adopts a copper wire sparse winding layer and a copper strip reverse gap winding layer, and compared with a single copper strip overlapping winding shielding, the shielding mode of the copper wire sparse winding layer and the copper strip reverse gap winding layer has stronger capacity of bearing short-circuit current. The high-flame-retardant wrapping layer, namely the high-flame-retardant alkali-free glass fiber tape, adopts the high-flame-retardant low-smoke halogen-free glass fiber tape in the wrapping mode, so that the insulation of the cable is effectively protected from being in direct contact with naked fire during combustion, and the safety performance of the cable is improved. The longitudinal metal-clad belt layer and the high-flame-retardant oxygen-isolating layer comprise a waterproof fire-isolating layer which is formed by a longitudinal aluminum-plastic composite belt layer and a high-flame-retardant oxygen-isolating layer which are sequentially arranged from the inside of the cable outwards and jointly form the cable. The oxygen isolation layer is made of a low-smoke halogen-free flame-retardant material with high flame retardance and good crusting performance, and can be formed into a hard shell when the cable is burnt, so that flame or high temperature is prevented from entering the cable to damage the insulating layer, and normal operation inside the cable is guaranteed.
The armor layer adopts a single-layer overlapped wrapped hard brass band layer. The termite and rat proof function of the cable is effectively realized while the sufficient mechanical strength of the cable such as compression resistance, bending strength and the like is met. The high flame-retardant belting layer adopts the high flame-retardant low-smoke halogen-free glass fiber tape, so that the condition that the outer sheath of the cable is damaged due to the direct contact of the armor layer and the outer sheath is avoided, and the flame-retardant effect is achieved. The outer sheath layer adopts the low-smoke halogen-free flame-retardant sheath material with good crusting performance, high flame retardance and high physical and mechanical properties, so that the flame retardance of the cable can be ensured, and the anti-cracking performance of the cable can also be ensured. According to the utility model, through the reasonable arrangement of the structure and the characteristic of a large double-layer structure, the invasion of moisture can be effectively prevented, and the requirement of a 168-hour water immersion test on the passing of a cable is met.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the application of the principles of the technology. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the specific embodiments described herein, and may include more effective embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. The utility model provides a fire-retardant 35kV looped netowrk power cable of high performance B1 level which characterized in that: the anti-termite and anti-cracking high-flame-retardant low-smoke halogen-free polyolefin sheath comprises a conductor and a first high-flame-retardant band layer arranged outside the conductor, wherein a conductor shielding layer, an insulating shielding layer, a semi-conductive band layer, a copper wire and copper strip shielding layer, a second high-flame-retardant band layer, a longitudinal metal band layer, a high-flame-retardant oxygen-isolating layer and a brass strip armor layer are sequentially arranged between the conductor and the first high-flame-retardant band layer from inside to outside, and an environment-friendly rat-proof, anti-termite, anti-cracking, high-flame-retardant, non-dripping and low-smoke halogen-free polyolefin sheath layer is further coated outside the first high-flame-retardant band layer.
2. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 1, wherein: the conductor core of the conductor is a copper core, and a compact stranded round conductor structure is adopted.
3. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 2, wherein: the conductor shielding layer, the insulating layer and the insulating shielding layer are formed by dry three-layer co-extrusion and are integrally formed, and the insulating eccentricity is less than 10%.
4. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 3, wherein: the copper wire and copper strip shielding layer adopts a copper wire sparse winding layer and a copper strip reverse clearance winding layer.
5. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 4, wherein: the high-flame-retardant wrapping tape layer is made of high-flame-retardant low-smoke halogen-free glass fiber tapes.
6. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 5, wherein: the longitudinal metal-clad belt layer and the high-flame-retardant oxygen-isolating layer comprise a waterproof fire-isolating layer which is formed by a longitudinal aluminum-plastic composite belt layer and a high-flame-retardant oxygen-isolating layer which are sequentially arranged from the inside of the cable outwards and jointly form the cable.
7. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 6, wherein: the high flame-retardant oxygen-isolating layer is made of a low-smoke halogen-free flame-retardant material with high flame retardance and good crusting performance.
8. The high-performance B1-grade flame-retardant 35kV ring network power cable according to claim 7, wherein: the armor layer adopts a single-layer overlapped wrapped hard brass band layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120808073.9U CN215933216U (en) | 2021-04-20 | 2021-04-20 | High-performance B1-grade flame-retardant 35kV looped network power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120808073.9U CN215933216U (en) | 2021-04-20 | 2021-04-20 | High-performance B1-grade flame-retardant 35kV looped network power cable |
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| Publication Number | Publication Date |
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| CN215933216U true CN215933216U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120808073.9U Active CN215933216U (en) | 2021-04-20 | 2021-04-20 | High-performance B1-grade flame-retardant 35kV looped network power cable |
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| CN (1) | CN215933216U (en) |
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2021
- 2021-04-20 CN CN202120808073.9U patent/CN215933216U/en active Active
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