CN208903733U - A kind of high fire resistance buried cable - Google Patents

Abstract

The utility model relates to field of cable technology, and disclose a kind of high fire resistance buried cable, including conductor, the outside of the conductor is fixedly installed with insulating layer, filler is filled between insulating layer and conductor, the outside of the insulating layer is fixedly installed with fireprotection layer, the outside of fireprotection layer is fixedly installed with reinforcement layer, the outside of reinforcement layer is fixedly installed with waterproof layer, the outside of waterproof layer is fixedly installed with flame-retardant layer, the outside of flame-retardant layer is fixedly installed with protective layer, and the outside of protective layer is fixedly installed with outer layer.The high fire resistance buried cable, by the way that fireprotection layer is arranged, and fireprotection layer mainly carries out fire-retardant and fireproofing by poly- methyl silicon resin layer, fire-retardant buried cable, fire prevention and high fire resistance can be effectively improved by the way that poly- methyl silicon resin layer is arranged, the service life for increasing cable is integrally improved the fire resistance of buried cable, reduces the situation of cable fire kindling, the injures and deaths of city property loss and personnel are thereby reduced, are easy to use.

Description

A kind of high fire resistance buried cable

Technical field

The utility model relates to field of cable technology, specially a kind of high fire resistance buried cable.

Background technique

Usually as several or similar to the object of rope made of several groups of wire strandings, we term it cable, every group of conducting wires Between mutually insulated, and be often twisted into around a center, entire outside is surrounded by the coating of high-insulation, and cable has interior logical The feature of electricity and external insulation.

The type of cable has very much, wherein just include buried cable, into after modern society, due to urban land is nervous, Reasons, the big cities such as traffic pressure is big and the appearance of the city is built generally use buried cable power transmission mode, relative to overhead line, underground electricity Cable has many advantages, such as to take up little area, reliable and strong antijamming capability of transmitting electricity, buried cable be often layed in cable duct, tunnel, pipeline and The undergrounds such as interior, since cable is mounted to underground, the fire resistance of cable more be needed to pay attention to, if the fire resisting of cable Property it is poor, easily underground occur fire, and then to urban electricity supply safely generate reinforce influence, cause property be lost and personnel Injures and deaths, to prevent the appearance of this situation, so propose a kind of high fire resistance buried cable.

Utility model content

(1) the technical issues of solving

In view of the deficiencies of the prior art, the utility model provides a kind of high fire resistance buried cable, has high fire resistance The advantages that, the fire resistance for solving cable is poor, fire easily occurs in underground, and then generate reinforcement safely to urban electricity supply The problem of influencing, causing the injures and deaths of property loss and personnel.

(2) technical solution

To realize above-mentioned high fire resistance purpose, the utility model is provided the following technical solutions: a kind of high fire resistance underground electricity Cable, including conductor, the outside of the conductor are fixedly installed with insulating layer, and filler is filled between insulating layer and conductor, described The outside of insulating layer is fixedly installed with fireprotection layer, and the outside of fireprotection layer is fixedly installed with reinforcement layer, the external fixed peace of reinforcement layer Equipped with waterproof layer, the outside of waterproof layer is fixedly installed with flame-retardant layer, and the outside of flame-retardant layer is fixedly installed with protective layer, protective layer Outside is fixedly installed with outer layer.

Preferably, the filler is polyurethane foam, and the insulating layer is calcium sulfate crystal whiskers insulating layer.

Preferably, the fireprotection layer is made of articulamentum, thermal grease block and poly- methyl silicon resin layer, the articulamentum Outside is fixedly installed with thermal grease block, and the outside of the thermal grease block is fixedly installed with poly- methyl silicon resin layer, described to dissipate Hot silica gel block is distributed in a ring.

Preferably, the reinforcement layer is made of the zinc-plated steel bar of the zinc-plated steel bar of multiple transverse directions and multiple longitudinal directions, the laterally plating Zinc steel bar and longitudinal zinc-plated steel bar are in lamination connection status.

Preferably, the waterproof layer is polyisobutene layer, and the flame-retardant layer is aluminium hydroxide flame-retardant layer.

Preferably, the protective layer is wrapped by the mica tape winding that quantity is no less than two.

(3) beneficial effect

Compared with prior art, the utility model provides a kind of high fire resistance buried cable, have it is following the utility model has the advantages that

1, the high fire resistance buried cable, by adding filler between conductor and insulating layer, and filler is poly- ammonia Ester foaming object has many advantages, such as that preceding foaming, high expansion and contraction are small, and with joint filling, bonding, sealing, heat-insulated and sound-absorbing etc. Multi-effect can effectively fill up the gap between conductor and insulating layer, and insulating layer is calcium sulfate crystal whiskers insulating layer, sulphur Sour calcium pyroborate have high intensity, high tenacity, high-insulativity, abrasion performance, high temperature resistant, acid and alkali-resistance, anticorrosive, infrared reflectivity is good Many excellent physicochemical properties such as good and nontoxic are protected by using damage tolerant degree of the calcium sulfate crystal whiskers insulating layer enhancing to inner conductor Shield and insulating properties protected working increase the degree of safety that buried cable uses.

2, the high fire resistance buried cable, by the way that fireprotection layer is arranged, and fireprotection layer is mainly carried out by poly- methyl silicon resin layer Fire-retardant and fireproofing, poly- methyl silicon resin are reticular structure, and poly- methyl silicon resin uses and is only connected with two on each silicon atom The raw material of a following methyl, can be changed into insoluble product when heated, and poly- methyl silicon resin has heat resistance height and antioxygen The strong characteristic of the property changed, and sheet specimens are made in methyl silicon resin heating DEG C or is heated to DEG C in the hydrogen gas stream in a vacuum It will not be destroyed, therefore, can effectively improve fire-retardant buried cable, fire prevention and height by the way that poly- methyl silicon resin layer is arranged Fire resistance increases the service life of cable, while thermal grease block can effectively dissipate to the temperature inside cable Work, and then safety when improving cable work, increase the service life of cable, are integrally improved the fire resisting of buried cable Property, the situation of cable fire kindling is reduced, the injures and deaths of city property loss and personnel are thereby reduced, is easy to use.

3, the high fire resistance buried cable is increased the self intensity of buried cable by setting reinforcement layer, electricity is effectively reduced Damage degree when cable is by external force collision, waterproof layer are polyisobutene layer, and polyisobutene is a kind of typical saturation linear polymer, Strand main body is free of double bond, and no long-chain branch exists, no asymmetric carbon atom, and structural unit has rule sequence to connect with monic tail It connects, due to the presence of two substituent methyls inside polyisobutene, causes molecular chain movement slowly and free volume is small, thus produce Raw low diffusion coefficient and gas permeability, therefore the wetting-out rate of water body can be slowed down, so that waterproofing protection is played to cable, Flame-retardant layer is aluminium hydroxide flame-retardant layer, and aluminium hydroxide itself has the function of fire-retardant, smoke elimination and filling three, because its is non-volatile, nothing Poison and the effect that cooperative flame retardant can be generated with many kinds of substance, are known as nuisanceless inorganic fire retardants, and flame-retardant layer can degrade after meeting fire Reticular structure is formed, which has certain suction-operated to smog, while crystallization can be precipitated and carry out at granulating to smog Reason, improves the sedimentation of smog, flame-retardant layer is integrally allowed effectively to carry out the absorption of heat and smog and the obstruction of the intensity of a fire Purpose increases the characteristic of buried cable flame-retardant, reduces the situation of cable fire kindling, thereby reduces city property damage The injures and deaths of consumption and personnel are easy to use.

4, the high fire resistance buried cable is wrapped by protective layer by mica tape winding, and mica tape is also known as fire resisting cloud Master tape, is a kind of refractory insulating material, and mica tape has excellent high temperature resistance and flame resistance energy, improves buried cable Fire resistance, meanwhile, by be arranged protective layer can be effectively prevented cable by mouse ant bite damage, improve the use of buried cable Service life is easy to use.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model；

Fig. 2 is the schematic diagram of internal structure of the utility model fireprotection layer；

Fig. 3 is the schematic diagram of internal structure of the utility model reinforcement layer.

In figure: 1 conductor, 2 insulating layers, 3 fillers, 4 fireprotection layers, 401 articulamentums, 402 thermal grease blocks, 403 poly- methyl Silicone layer, 5 reinforcement layers, 501 laterally zinc-plated steel bars, 502 longitudinal zinc-plated steel bars, 6 waterproof layers, 7 flame-retardant layers, 8 protective layers, outside 9 Layer.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-3 is please referred to, the utility model provides the following technical solutions: a kind of high fire resistance buried cable, including conductor 1, the outside of conductor 1 is fixedly installed with insulating layer 2, and insulating layer 2 is calcium sulfate crystal whiskers insulating layer, fills out between insulating layer 2 and conductor 1 Filled with filler 3, filler 3 is polyurethane foam, by adding filler 3 between conductor 1 and insulating layer 2, and is filled Object 3 is polyurethane foam, has many advantages, such as preceding foaming, high expansion and shrinks small, and has joint filling, bonding, sealing, heat-insulated With the multi-effects such as sound-absorbing, effectively the gap between conductor 1 and insulating layer 2 can be filled up, insulating layer 2 is that calcium sulfate is brilliant Must insulating layer, calcium sulfate crystal whiskers have high intensity, high tenacity, high-insulativity, abrasion performance, high temperature resistant, acid and alkali-resistance, anticorrosive, red Outside line is reflexive well and many excellent physicochemical properties such as nontoxic, is led by using the enhancing of calcium sulfate crystal whiskers insulating layer to inside The damage tolerant degree protection of body 1 and insulating properties protected working increase the degree of safety that buried cable uses, the external fixed peace of insulating layer 2 Equipped with fireprotection layer 4, fireprotection layer 4 is made of articulamentum 401, thermal grease block 402 and poly- methyl silicon resin layer 403, articulamentum 401 Outside be fixedly installed with thermal grease block 402, the outside of thermal grease block 402 is fixedly installed with poly- methyl silicon resin layer 403, Thermal grease block 402 is distributed in a ring, and by the way that fireprotection layer 4 is arranged, and fireprotection layer 4 is mainly carried out by poly- methyl silicon resin layer 403 Fire-retardant and fireproofing, poly- methyl silicon resin are reticular structure, and poly- methyl silicon resin uses and is only connected with two on each silicon atom The raw material of a following methyl, can be changed into insoluble product when heated, and poly- methyl silicon resin has heat resistance height and antioxygen The strong characteristic of the property changed, and sheet specimens are made in methyl silicon resin, heat 550 DEG C in a vacuum or are heated in the hydrogen gas stream 500 DEG C will not be destroyed, therefore, by be arranged poly- methyl silicon resin layer 403 can effectively improve buried cable it is fire-retardant, Fire prevention and high fire resistance, increase the service life of cable, while thermal grease block 402 can be effectively to the warm inside cable Degree carries out dissipation work, and then safety when improving cable work, increases the service life of cable, is integrally improved underground The fire resistance of cable reduces the situation of cable fire kindling, thereby reduces the injures and deaths of city property loss and personnel, conveniently makes With the outside of fireprotection layer 4 is fixedly installed with reinforcement layer 5, and reinforcement layer 5 is zinc-plated by the zinc-plated steel bar 501 of multiple transverse directions and multiple longitudinal directions Steel bar 502 forms, and laterally zinc-plated steel bar 501 and longitudinal zinc-plated steel bar 502 are in lamination connection status, that is, it is zinc-plated to cover one layer of longitudinal direction After steel bar 502, then the zinc-plated steel bar 501 of one layer of transverse direction is covered, be allowed to cover layer by layer, buried cable is increased by setting reinforcement layer 5 Self intensity, damage degree of the cable by external force collision when is effectively reduced, the outside of reinforcement layer 5 is fixedly installed with waterproof layer 6, prevent Water layer 6 is polyisobutene layer, and waterproof layer 6 is polyisobutene layer, and polyisobutene is a kind of typical saturation linear polymer, molecule Chain main body is free of double bond, and no long-chain branch exists, no asymmetric carbon atom, and structural unit has rule sequence to connect with monic tail, Due to the presence of two substituent methyls inside polyisobutene, cause molecular chain movement slowly and free volume is small, thus generates Low diffusion coefficient and gas permeability, therefore the wetting-out rate of water body can be slowed down, to play waterproofing protection to cable, prevent The outside of water layer 6 is fixedly installed with flame-retardant layer 7, and flame-retardant layer 7 is aluminium hydroxide flame-retardant layer, and flame-retardant layer 7 is aluminium hydroxide flame-retardant layer, Aluminium hydroxide itself has the function of fire-retardant, smoke elimination and filling three, because its is non-volatile, nontoxic and can cooperate with many kinds of substance generation Fire-retardant effect is known as nuisanceless inorganic fire retardants, and flame-retardant layer 7 can degrade to form reticular structure after meeting fire, and the structure is to cigarette Mist has certain suction-operated, while crystallization can be precipitated and carry out grainy treatment to smog, improves the sedimentation of smog, integrally makes The absorption of heat and smog and the obstruction purpose of the intensity of a fire can effectively be carried out by obtaining flame-retardant layer 7, and it is fire-retardant to increase buried cable The characteristic of fire resisting reduces the situation of cable fire kindling, thereby reduces the injures and deaths of city property loss and personnel, conveniently makes Be fixedly installed with protective layer 8 with, the outside of flame-retardant layer 7, protective layer 8 wrapped by the mica tape winding that quantity is no less than two and At, by protective layer 8 by mica tape winding wrap, mica tape is also known as fire-resistant isinglass belt, is a kind of refractory insulating material, cloud Master tape has excellent high temperature resistance and flame resistance energy, improves the fire resistance of buried cable, meanwhile, it is protected by setting Layer 8 can be effectively prevented cable and bite damage by mouse ant, improves the service life of buried cable, is easy to use, outside protective layer 8 Portion is fixedly installed with outer layer 9.

When in use, the fire resistance that buried cable is improved by setting fireprotection layer 4 and flame-retardant layer 7, by the way that waterproof layer 6 is arranged The waterproofness for improving buried cable increases the protection and safety when buried cable uses by setting reinforcement layer 5 and protective layer 8 Property.

In conclusion the high fire resistance buried cable, by adding filler 3 between conductor 1 and insulating layer 2, and is filled out Fill object 3 be polyurethane foam, have many advantages, such as it is preceding foaming, high expansion and shrink it is small, and have joint filling, bonding, sealing, every The multi-effects such as heat and sound-absorbing, can effectively fill up the gap between conductor 1 and insulating layer 2, and insulating layer 2 is calcium sulfate Whisker insulating layer, calcium sulfate crystal whiskers have high intensity, high tenacity, high-insulativity, abrasion performance, high temperature resistant, acid and alkali-resistance, it is anticorrosive, Infrared reflectivity well and many excellent physicochemical properties such as nontoxic, is enhanced by using calcium sulfate crystal whiskers insulating layer to inside The damage tolerant degree protection of conductor 1 and insulating properties protected working increase the degree of safety that buried cable uses, by the way that fireprotection layer 4 is arranged, and Fireprotection layer 4 mainly carries out fire-retardant and fireproofing by poly- methyl silicon resin layer 403, and poly- methyl silicon resin is reticular structure, poly- first Base silicone resin can be changed into insoluble production using the raw material only connected on each silicon atom there are two following methyl when heated Object, poly- methyl silicon resin has heat resistance height and the strong characteristic of inoxidizability, and sheet specimens are made in methyl silicon resin, Heating 550 DEG C in vacuum or being heated to 500 DEG C in the hydrogen gas stream will not be destroyed, therefore, by the way that poly- methyl silicon tree is arranged Rouge layer 403 can effectively improve fire-retardant buried cable, fire prevention and high fire resistance, increase the service life of cable, dissipate simultaneously Hot silica gel block 402 effectively can carry out dissipation work to the temperature inside cable, and then safety when improving cable work Property, increase the service life of cable, be integrally improved the fire resistance of buried cable, reduce the situation of cable fire kindling, in turn The injures and deaths of city property loss and personnel are reduced, are easy to use, the self strong of buried cable is increased by setting reinforcement layer 5 Damage degree of the cable by external force collision when is effectively reduced in degree, and waterproof layer 6 is polyisobutene layer, and polyisobutene is a kind of typical Be saturated linear polymer, strand main body is free of double bond, and no long-chain branch exists, no asymmetric carbon atom, and structural unit with Monic tail has rule sequence connection, due to the presence of two substituent methyls inside polyisobutene, cause molecular chain movement slowly and Free volume is small, thus generates low diffusion coefficient and gas permeability, therefore can slow down the wetting-out rate of water body, thus right Cable plays waterproofing protection, and flame-retardant layer 7 is aluminium hydroxide flame-retardant layer, and aluminium hydroxide itself has fire-retardant, smoke elimination and filling three Function is known as nuisanceless inorganic fire retardants because its is non-volatile, nontoxic and can generate the effect of cooperative flame retardant with many kinds of substance, Flame-retardant layer 7 can degrade to form reticular structure after meeting fire, which has certain suction-operated to smog, while crystallization can be precipitated Grainy treatment is carried out to smog, improves the sedimentation of smog, flame-retardant layer 7 is integrally allowed effectively to carry out heat and smog The obstruction purpose of absorption and the intensity of a fire increases the characteristic of buried cable flame-retardant, reduces the situation of cable fire kindling, The injures and deaths of city property loss and personnel are thereby reduced, are easy to use, are wrapped by protective layer 8 by mica tape winding, Mica tape is also known as fire-resistant isinglass belt, is a kind of refractory insulating material, and mica tape has excellent high temperature resistance and flame resistance Can, the fire resistance of buried cable is improved, meanwhile, cable can be effectively prevented by setting protective layer 8, damage is bitten by mouse ant, The service life of buried cable is improved, is easy to use, the fire resistance for solving cable is poor, fire easily occurs in underground, into And the problem of generating the influence reinforced safely to urban electricity supply, causing the injures and deaths of property loss and personnel.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. a kind of high fire resistance buried cable, including conductor (1), it is characterised in that: the outside of the conductor (1) is fixedly installed with Insulating layer (2) is filled with filler (3) between insulating layer (2) and conductor (1), and the outside of the insulating layer (2) is fixedly installed with Fireprotection layer (4), the outside of fireprotection layer (4) are fixedly installed with reinforcement layer (5), and the outside of reinforcement layer (5) is fixedly installed with waterproof layer (6), the outside of waterproof layer (6) is fixedly installed with flame-retardant layer (7), and the outside of flame-retardant layer (7) is fixedly installed with protective layer (8), is prevented The outside of sheath (8) is fixedly installed with outer layer (9).

2. a kind of high fire resistance buried cable according to claim 1, it is characterised in that: the filler (3) is poly- ammonia Ester foaming object, the insulating layer (2) are calcium sulfate crystal whiskers insulating layer.

3. a kind of high fire resistance buried cable according to claim 1, it is characterised in that: the fireprotection layer (4) is by connecting Layer (401), thermal grease block (402) and poly- methyl silicon resin layer (403) composition, the external fixed peace of the articulamentum (401) Equipped with thermal grease block (402), the outside of the thermal grease block (402) is fixedly installed with poly- methyl silicon resin layer (403), institute Thermal grease block (402) is stated to be distributed in a ring.

4. a kind of high fire resistance buried cable according to claim 1, it is characterised in that: the reinforcement layer (5) is by multiple Laterally zinc-plated steel bar (501) and the zinc-plated steel bar in multiple longitudinal directions (502) composition, the zinc-plated steel bar of transverse direction (501) and longitudinal direction are zinc-plated Steel bar (502) is in lamination connection status.

5. a kind of high fire resistance buried cable according to claim 1, it is characterised in that: the waterproof layer (6) is different to gather Butylene layer, the flame-retardant layer (7) are aluminium hydroxide flame-retardant layer.

6. a kind of high fire resistance buried cable according to claim 1, it is characterised in that: the protective layer (8) is by quantity No less than two mica tape windings are wrapped.