CN208970195U - Efficient fire resisting heat dissipation cable - Google Patents

Abstract

The utility model discloses a kind of efficient fire resisting heat dissipation cable, the shielding band mutually coats shielded layer described in overlap to form by the wave mode overlay segment of two sides；It is provided with heat collector cavity between the shielded layer and thermal-arrest sheath, which leads to cable outer surface by heat release hole；The armouring tape mutually coats metal armor layers described in overlap to form by the steel band lap segment of two sides, boarding hole is equipped in the steel band lap segment of armouring tape side, the steel band lap segment of the armouring tape other side is equipped with interlocking boss, and the interlocking boss is embedded in boarding hole when overlap joint；The rare earth flame retardant coating material component includes: 8 wt%-12 wt% of fluorubber, 5 wt%-8 wt% of aluminium hydroxide, 2 wt%-4 wt% of rare earth oxide, 1 wt%-2 wt% of glycerine, 2 wt%-4 wt% of silicon carbide, 3 wt%-6 wt% of lanthanum orthophosphate, 6 wt%-8 wt% of gadolinium zirconate, remaining is epoxy resin.The cable not only has high heat-resistant fireproof performance, and energy high efficiency and heat radiation, and has stable structural intergrity and higher mechanical performance.

Description

Efficient fire resisting heat dissipation cable

Technical field

The utility model relates to a kind of for conveying the power cable of electric energy, more particularly to have flame-resistant high-temperature-resistant and can be high Imitate the power cable of heat exchange.

Background technique

As skyscraper, hospital, hotel, station and airport etc. are continuously increased and subway, urban track traffic, big The construction of type communal facility, the importance of security against fire is also increasingly prominent to be come out, and the laying amount of cable is doubled and redoubled in building, builds Build object start using fire resistant flame retardant high temperature-resistant cable be powered it is imperative, in particular for skyscraper, subway, tunnel, The power cable of the important places such as power plant and nuclear power station does not require nothing more than its and transmits electric energy, but also to have high temperature resistant and fire-retardant Specific function, to guarantee the safe operation of cable.

The basic structure of power cable mainly includes conductor thread core, insulating layer, shielded layer, armor and protective layer.It is existing The outer jacket of high-temperature-resistant power cable mainly uses fire-retardant outer jacket, can prevent the intensity of a fire under this general temperature conditions of structure Combustion is prolonged, but at 1000 DEG C so that reach 3500 DEG C at a temperature of, shield sleeve flame and flame retardant coating will lose protective effect and make The effect of transmission electric energy cannot be played by obtaining cable, or even cause human life dangerous and " secondary hazards ".And transferring high voltage The power cable of electric energy；Power cable can generate a large amount of heat during conveying electric energy simultaneously, need this partial heat It sheds in time, since these heats are from cable conductor conductor position, it is necessary to it could be distributed outward across multi-layer cable structure, It is easy to cause the aging of insulation, reduces the service life of cable.

Cable sheath has the function of the service life for guaranteeing electric property, improving cable, usual armature of cable layer There are two types of structures: wire armoring structure and steel-tape armouring structure, though wire armoring structural cable can bear biggish axial tension, But wire armoring production is more difficult, at high cost, and use scope is limited.Steel-tape armouring structure can bear biggish radial force, tool Have good compression strength, application range is more extensive, such as in the engineerings such as railway, high-speed rail, urban transportation, be suitable for it is buried, Tunnel and cable installation in pipe.But existing steel-tape armouring structure mostly uses double steel bands, gap around-packing technology, is by steel band around being wrapped in Armor, this inadequate firm stable of armor structure are formed on cable core, steel band is clamped imprecision, is easy to appear armouring tape Joint gap, decline the strengths in tension and compression of armor, neither can guarantee that the construction of cable is complete and electric property, it is also unfavorable It is improved in cable service life.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of efficient fire resisting heat dissipation cables, and the power cable is not only With high heat-resistant fireproof performance, and can high efficiency and heat radiation, and there is stable structural intergrity and higher machinery Performance.

In order to solve the above-mentioned technical problem, the efficient fire resisting heat dissipation cable of the utility model, including cable core and filled layer, cable Core is embedded in filled layer；The cable core is made of three cable core conductors, is successively coated with conductor shielding in every cable core conductor Layer and insulating layer of conductor, belting layer is surrounded on the cable core and filled layer, is successively coated inside-out on the belting layer There are shielded layer, thermal-arrest sheath, metal armor layers, oversheath, rare earth flame retardant coating；Shielding band is mutually wrapped by the wave mode overlay segment of two sides Cover shielded layer described in overlap to form；It is provided with heat collector cavity between the shielded layer and thermal-arrest sheath, the heat collector cavity is by dissipating Hot hole leads to cable outer surface；The armouring tape mutually coats metal described in overlap to form by the steel band lap segment of two sides Armor is equipped with boarding hole in the steel band lap segment of armouring tape side, sets in the steel band lap segment of the armouring tape other side There is an interlocking boss, the interlocking boss is embedded in boarding hole when overlap joint；The rare earth flame retardant coating material component includes: fluorubber 8 Wt%-12 wt%, 5 wt%-8 wt% of aluminium hydroxide, 2 wt%-4 wt% of rare earth oxide, 1 wt%-2 wt% of glycerine, silicon carbide 2 wt%-4 wt%, 3 wt%-6 wt% of lanthanum orthophosphate, 6 wt%-8 wt% of gadolinium zirconate, remaining is epoxy resin.

In the present invention, since steel band shielded layer is mutually to overlap package by shielding the wave mode overlay segment with two sides It is constituted on cable core, the shielding band of this structure overlaps accurate positioning, and it is firm to overlap, and the tension and Duplication of shielded layer can It is precisely controlled, is convenient for overmolded, high production efficiency, is conducive to the reduction of cables manufacturing cost, which also makes Must shield band two sides are reliable always and closely overlapped fitting, avoid shielding band overlap joint side fold and dehisce and connect The generation for touching gap constitutes more tight reliable shield effectiveness, efficiently avoids electromagnetic signal inside cable core conductor Radiation leaks, and reduces power cable to the electromagnetic interference of electrical equipment around.Again due to being provided with thermal-arrest shield on the shielding layer Set, to form heat collector cavity between shielded layer and thermal-arrest sheath, heat collector cavity further through heat release hole lead to cable outer surface and with The external world is connected, and heat release hole realizes that cable core calorific value is exchanged with extraneous；Power cable can generate greatly during conveying electric energy This partial heat can be shed in time by heat release hole, not only ensure that the high efficiency of transmission of electric energy, but also effectively by the heat of amount The aging for preventing cable insulation extends the service life of cable.Due also to metal armor layers pass through armouring tape two sides The mutually nested connection of steel band lap segment is connected into section shape by the mutual interlocking circle that steel band lap segment rabbets boss and boarding hole The sufficiently stable cyclic structure of shape eliminates the joint gap of armouring tape, makes armouring so that the steel band clamping of armor is tight Layer is able to bear higher radial force, has good compression strength, and use scope is extensive.Tightly stable sheathed structure also rises Good shielding action is arrived, the double technique effect that there is enhancing cable machinery intensity, improve cable shield performance.In this reality With rare earth flame retardant coating is provided on novel power cable oversheath, the specific function such as power cable flame-resistant high-temperature-resistant is greatly strengthened Can, and it is added to rare earth element in fire resisting layer material, so that the flame-resistant high-temperature-resistant performance of cable is greatly improved.It is dilute Native fire resisting layer material is that basic material is added to lanthanum orthophosphate, gadolinium zirconate and rare earth oxide with epoxy resin, and gadolinium zirconate has Very low thermal conductivity and good high-temperature stability, lanthanum orthophosphate preferably improve composite material as a kind of toughener Toughness rose elevated temperature strength, rare earth oxide then enhance composite structure stability and thermo-chemical stability, advantageously form A kind of high temperature resistant, low thermally conductive, anticorrosive and high tenacity material property；The effect of rare earth element, it is thermally conductive to greatly improve its Coefficient and thermal stability；The introducing of fluorine atom in fluorubber, and assign rubber excellent heat resistance, it is inoxidizability, oil resistivity, resistance to Corrosivity and ageing resistance have high high temperature resistance and resistance to ag(e)ing；Fluorubber also has excellent physical mechanical property And electrical insulation capability.

The two sides of the further embodiment of the utility model, the shielding bandwidth direction are wave mode overlay segment, the wave Type overlay segment section is in broken line or waveform segment, is shielded with the broken line or wave cross section shape kissing on the wave mode overlay segment of two sides It closes.The shielding band is pure copper strips, and the width of the shielding band is b, and the width that shielding takes wave mode overlay segment is a, a/b=1/5. The structure can be realized shielding band precise positioning and tight overlap joint, not only contributes to package molding, improves production efficiency, Er Qieneng It is enough precisely controlled shielded layer tension and Duplication, shield effectiveness is more preferable.

The further embodiment of the utility model is provided with heat collector cavity ribs, thermal-arrest sheath on the thermal-arrest sheath Shielded layer, which is supported in, by heat collector cavity ribs forms heat collector cavity.It is structurally reasonable, convenient for production processing.

Preferred embodiments of the present invention, the heat release hole pass through thermal-arrest sheath, metal armor layers, oversheath and dilute Native flame retardant coating；The heat release hole one end is connected to heat collector cavity, and the heat release hole other end leads to cable outer surface.The heat release hole is protected along thermal-arrest Set, metal armor layers, oversheath and rare earth flame retardant coating circumferential direction be uniformly distributed.The structure can sufficiently realize cable and extraneous heat Exchange, heat dissipation effect are more preferable.

The further embodiment of the utility model, the two sides of the armouring tape width direction are steel band lap segment, steel H/H=1/2 the ratio between the thickness H of thickness h and armouring tape with lap segment；It is provided in the steel band lap segment of armouring tape side Rabbet boss, is provided with boarding hole in the steel band lap segment of the armouring tape other side, the interlocking boss and interlocking hole shape kissing It closes.Punching along its length has several row punching boss on the armouring tape ontology, and adjacent two row punchings boss strikes out Type is contrary.The armouring belt stable structure constituted after steel band overlap joint, improves the mechanical strengths such as resistance to compression shock resistance, in armouring Punching punching press boss and the intensity and rigidity of teel band on steel band.

Preferred embodiments of the present invention, the rare earth flame retardant coating material component include: 10 wt% of fluorubber, hydrogen-oxygen Change 6.8 wt% of aluminium, 3 wt% of rare earth oxide, 1.5 wt% of glycerine, 3 wt% of silicon carbide, 3.6 wt% of lanthanum orthophosphate, gadolinium zirconate 7.2 Wt%, remaining is epoxy resin.The flame-resistant high-temperature-resistant performance for improving power cable, improves the thermal coefficient of cable external protective material And thermal stability.

Preferred embodiments of the present invention are also coated with rare earth water blocking layer, rare earth resistance on the rare earth flame retardant coating The material component of water layer includes: 38 wt% of epoxy resin, 6 wt% of tung oil, rare earth oxide 3 wt%, magnesia 4wt%, zinc oxide 4.6 wt%, remaining is butyronitrile rubber.With the high moisture resistant effect that blocks water, cable is enabled to be applicable in the environment of extreme humidity Middle safety effect.

Preferred embodiments of the present invention, the rare earth oxygen soil oxide are cerium oxide or lanthana.Can effectively it change Kind and enhancing combustion resistance material high temperature resistant and waterproof performance.

Detailed description of the invention

The utility model efficient fire resisting heat dissipation cable is described further with reference to the accompanying drawings and detailed description.

Fig. 1 is a kind of efficient fire resisting heat dissipation cross section structure schematic diagram of specific embodiment of cable of the utility model；

Fig. 2 is the cross section structure schematic diagram of thermal-arrest sheath in Fig. 1 illustrated embodiment；

Fig. 3 is shielding band deployed configuration schematic diagram in Fig. 1 illustrated embodiment；

Fig. 4 is the expansion cross section structure schematic diagram of metal armor layers armouring tape in Fig. 1 illustrated embodiment；

Fig. 5 is the overlooking structure diagram for implementing structure shown in Fig. 4.

In figure, 1-cable core conductor, 2-conductor shields, 3-insulating layer of conductor, 4-filled layers, 5-belting layers, 6- Shielded layer, 7-thermal-arrest sheaths, 8-heat collector cavities, 9-heat collector cavity ribs, 10-heat release holes, 11-metal armor layers, 12-are outside Sheath, 13-rare earth flame retardant coatings, 14-shielding bands, 15-wave mode overlay segments, 16-armouring tapes, 17-steel band lap segments, 18-interlocking boss, 19-boarding holes, 20-punching press boss.

Specific embodiment

Efficient fire resisting heat dissipation cable as shown in Figure 1, the cable core of the power cable are made of three cable core conductors 1, and every Cable core conductor 1 is twisted by several copper cable core conductor silks, is coated with conductor shield 2 in every cable core conductor 1, Insulating layer of conductor 3 is coated on conductor shield 2, which is extruded by high-density polyethylene material.Three The insulation core wire that cable core conductor 1 and its conductor shield 2 and insulating layer of conductor 3 are constituted is embedded in filled layer 4, filled layer 4 It is filled by glass cord, which makes three insulated electric conductor stabilized structures in filled layer, shape rounding, and can increase It is powered on the intensity of cable.It is surrounded with belting layer 5 on cable core and filled layer 4, which is formed by non-woven fabrics band is wrapped.? Shielded layer 6, thermal-arrest sheath 7, metal armor layers 11, oversheath 12, rare earth flame retardant coating are successively coated on belting layer 5 inside-out 13, thermal-arrest sheath 7 and oversheath 12 are extruded by high-density polyethylene material.

Heat collector cavity 8 is provided between shielded layer 6 and thermal-arrest sheath 7.As shown in Fig. 2, being squeezed on thermal-arrest sheath 7 by whole Technique processed and be provided with heat collector cavity ribs 9, heat collector cavity ribs 9 are set on the inner wall of thermal-arrest sheath 7, and the heat collector cavity branch Stake rib 9 is arranged along the length direction of thermal-arrest sheath 7, and 8 collection are distributed along the circumference on the inner wall of thermal-arrest sheath 7 in the present embodiment Hot chamber ribs 9.Thermal-arrest sheath 7 is supported in shielded layer 6 by heat collector cavity ribs 9 and forms heat collector cavity 8；The heat collector cavity 8 is logical It crosses heat release hole 10 and leads to cable outer surface；Heat release hole 10 passes through 7 ontology of thermal-arrest sheath, metal armor layers 11, oversheath 12 and dilute Native flame retardant coating 13 and lead to cable outer surface；10 one end of heat release hole is connected to heat collector cavity 8, and 10 other end of heat release hole leads to outside cable Surface.Heat release hole 10 is uniformly distributed along the circumferential direction of thermal-arrest sheath 7, metal armor layers 11, oversheath 12 and rare earth flame retardant coating 13, is made It obtains each heat collector cavity 8 and is corresponding with a heat release hole 10.

It is formed as shown in figure 3, the shielding band 14 shown in the figure of shielded layer 6 is wrapped.Shielding band 14 is copper shielding band, screen The width of shield tape 14 is the ㎜ of b=25, the two sides of shielding 14 width direction of band is provided with wave mode overlay segment 15, wave mode overlapping The ㎜ of width a=5 of section 15.The section of wave mode overlay segment 15 is broken line, the cross sectional shape of the broken line of two sides wave mode overlay segment 15 It matches, the wave mode overlay segment 15 that 14 two sides of band are shielded when wrapped is superimposed with each other the shielded layer 6 of overlap to form round.Wave mode weight The section of folded section 15 can also be the wave cross sections shape such as sine curve, shield the width b of band 14 and the width of wave mode overlay segment 15 Degree a is not limited to above-mentioned size, but its ratio a/b=1/5.

It is overmolding to the armouring tape 16 of metal armor layers 8 as shown in Figure 4, Figure 5, the thickness H of the armouring tape 16 is 0.8 ㎜, width L=50 ㎜.Steel band lap segment 17, the width L of steel band lap segment 17 are equipped in the two sides of armouring tape 16₁=6㎜； When molding, the steel band lap segment 17 of two sides is bonded to each other overlap joint.It is rushed in the steel band lap segment 17 of 16 a side of armouring tape It is formed with boarding hole 19, boarding hole 19 is through-hole, the ㎜ of aperture φ=3；Punching has interlocking boss in other side steel band lap segment 17 18, the outer diameter of the interlocking boss 18 is 3 ㎜, and interlocking boss 18 is embedded in boarding hole 19 just at the right time when overlap joint.Steel band lap segment 17 Thickness h=0.4 ㎜, boarding hole 19 or rabbet the center of boss 18 away from for 50 ㎜；The thickness h and armouring steel of steel band lap segment 17 With 16 h/H=1/2 the ratio between thickness H.On the ontology of armouring tape 16, punching has 5 row punching boss 20, and adjacent two rows of rushes Belling platform 20 is staggered from the forward and backward direction of steel band ontology.20 center of punching press boss of same row is away from also 50 ㎜, punching The outer diameter of belling platform 20 is 3 ㎜.

The rare earth flame retardant coating 13 for coating and being formed on oversheath 12, the rare earth material component of the rare earth flame retardant coating 13 include Following embodiment:

Embodiment one:

The rare earth flame retardant coating material component includes: 10 wt% of fluorubber, 6.8 wt% of aluminium hydroxide, rare earth oxide 3 Wt%, 1.5 wt% of glycerine, 3 wt% of silicon carbide, 3.6 wt% of lanthanum orthophosphate, 7.2 wt% of gadolinium zirconate, remaining is epoxy resin.

Embodiment two:

Rare earth flame retardant coating material component includes: 8 wt% of fluorubber, 5 wt% of aluminium hydroxide, 2 wt% of rare earth oxide, and the third three 1 wt% of alcohol, 2 wt% of silicon carbide, 3 wt% of lanthanum orthophosphate, 6 wt% of gadolinium zirconate, remaining is epoxy resin.

Embodiment three:

Rare earth flame retardant coating material component includes: 12 wt% of fluorubber, 8 wt% of aluminium hydroxide, rare earth oxide 4 wt%, and third 2 wt% of triol, 4 wt% of silicon carbide, 6 wt% of lanthanum orthophosphate, 8 wt% of gadolinium zirconate, remaining is epoxy resin.

Another embodiment of the utility model, the embodiment except on rare earth flame retardant coating be coated with rare earth water blocking layer in addition to, Its structure is identical.The material component of the rare earth water blocking layer includes: 38 wt% of epoxy resin, 6 wt% of tung oil, rare earth oxide 3 Wt%, magnesia 4wt%, 4.6 wt% of zinc oxide, remaining is butyronitrile rubber.

In the above embodiments, rare earth oxygen soil oxide is cerium oxide or lanthana.

Claims (7)

1. The cable 1. a kind of efficient fire resisting is radiated, including cable core and filled layer (4), cable core are embedded in filled layer (4)；The cable core by Three cable core conductors (1) are constituted, and conductor shield (2) and insulating layer of conductor are successively coated on every cable core conductor (1) (3), belting layer (5) are surrounded on the cable core and filled layer (4), it is characterised in that: on the belting layer (5) inside-out Successively it is coated with shielded layer (6), thermal-arrest sheath (7), metal armor layers (11), oversheath (12), rare earth flame retardant coating (13)；Shielding Band (14) mutually coats shielded layer (6) described in overlap to form by the wave mode overlay segment (15) of two sides；In the shielded layer (6) and Heat collector cavity (8) are provided between thermal-arrest sheath (7), which leads to cable outer surface by heat release hole (10)；Armouring steel Band (16) mutually coats metal armor layers (11) described in overlap to form by the steel band lap segment (17) of two sides, in armouring tape (16) the steel band lap segment (17) of side is equipped with boarding hole (19), in the steel band lap segment (17) of armouring tape (16) other side Equipped with interlocking boss (18), the interlocking boss (18) is embedded in boarding hole (19) when overlap joint.
2. The cable 2. efficient fire resisting according to claim 1 is radiated, it is characterised in that: described shielding band (14) width direction Two sides are wave mode overlay segment (15), which is in broken line or waveform segment, shielding band (14) two sides wave mode Broken line or wave cross section shape on overlay segment (15) match.
3. The cable 3. efficient fire resisting according to claim 2 is radiated, it is characterised in that: the shielding band (14) is pure copper strips, The width of the shielding band (14) is b, and the width of wave mode overlay segment (15) is a, a/b=1/5 on shielding band (14).
4. The cable 4. efficient fire resisting according to claim 1 is radiated, it is characterised in that: be provided on the thermal-arrest sheath (7) Heat collector cavity ribs (9), thermal-arrest sheath (7) are supported in shielded layer (6) by heat collector cavity ribs (9) and form heat collector cavity (8).
5. The cable 5. efficient fire resisting according to claim 1 or 4 is radiated, it is characterised in that: the heat release hole (10) passes through collection Hot sheath (7), metal armor layers (11), oversheath (12) and rare earth flame retardant coating (13)；Heat release hole (10) one end is connected to thermal-arrest Chamber (8), heat release hole (10) other end lead to cable outer surface；The heat release hole (10) is along thermal-arrest sheath (7), metal armor layers (11), the circumferential direction of oversheath (12) and rare earth flame retardant coating (13) is uniformly distributed.
6. The cable 6. efficient fire resisting according to claim 1 is radiated, it is characterised in that: armouring tape (16) width direction Two sides be steel band lap segment (17), h/H=1/2 the ratio between thickness H of the thickness h of steel band lap segment (17) and armouring tape (16)； Interlocking boss (18), the steel band of armouring tape (16) other side are provided in the steel band lap segment (17) of armouring tape (16) side Boarding hole (19) are provided in lap segment (17), which matches with boarding hole (19) shape.
7. The cable 7. efficient fire resisting according to claim 6 is radiated, it is characterised in that: edge on armouring tape (16) ontology Length direction punching has several row punching boss (20), and the punch forming of adjacent two row punchings boss (20) is contrary.