CN209103858U - Heat-resistant pressure-resistant cable - Google Patents

Abstract

The utility model discloses a kind of heat-resistant pressure-resistant cables, conductor shield and insulating layer of conductor are successively coated in every cable core conductor, it is surrounded with belting layer on cable core and filled layer, is successively coated with shielded layer, thermal-arrest sheath, metal armor layers, oversheath, rare earth flame retardant coating inside-out on belting layer；It is arranged between shielded layer and thermal-arrest sheath in heat collector cavity, which leads to cable outer surface by heat release hole；Armouring tape mutually coats overlap to form metal armor layers by the steel band lap segment of two sides, and boarding hole is equipped in the steel band lap segment of armouring tape side；Rare earth flame retardant coating material component includes: fluorubber, and aluminium hydroxide, rare earth oxide, glycerine, silicon carbide, lanthanum orthophosphate, gadolinium zirconate, remaining is epoxy resin.The cable not only has stable structural intergrity and higher mechanical performance, but also has high heat-resistant fireproof performance and high efficiency and heat radiation effect.

Description

Heat-resistant pressure-resistant cable

Technical field

The utility model relates to a kind of for conveying the power cable of electric energy, more particularly to have high temperature resistant and can efficiently change Heat and the stable power cable of structural integrity.

Background technique

Power cable is to make in electric system basic routing line to the cable product for transmitting and distributing high-power power Use conjunction is very extensive, will be used wider and wider, the type of cable is also continuously increased therewith.Urban distribution network, power station are drawn Route, industrial and mining enterprises' in-line power and submarine transmission route all be unable to do without power cable, in particular for skyscraper, subway, The power cable of the important places such as tunnel, power plant and nuclear power station does not require nothing more than it and transmits electric energy, but also to have high temperature resistant With 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, otherwise easily causes the aging of insulation, reduce 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 heat-resistant pressure-resistant cable, which not only has Stable structural intergrity and higher mechanical performance, and there is high heat-resistant fireproof performance, and can high efficiency and heat radiation.

In order to solve the above-mentioned technical problem, the heat-resistant pressure-resistant cable of the utility model, including cable core and filled layer, cable core bury In filled layer；The cable core is made of three cable core conductors, be successively coated in every cable core conductor conductor shield and Insulating layer of conductor is surrounded with belting layer on the cable core and filled layer, is successively coated with screen inside-out on the belting layer Cover layer, thermal-arrest sheath, metal armor layers, oversheath, rare earth flame retardant coating；Collection is provided between the shielded layer and thermal-arrest sheath Hot chamber, the heat collector cavity lead to cable outer surface by heat release hole；The armouring tape is mutually wrapped by the steel band lap segment of two sides Metal armor layers described in overlap to form are covered, boarding hole is equipped in the steel band lap segment of armouring tape side, armouring tape is another The steel band lap segment of 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, rare earth oxide 2 wt%-4 wt%, and third 1 wt%-2 wt% of triol, 2 wt%-4 wt% of silicon carbide, 3 wt%-6 wt% of lanthanum orthophosphate, gadolinium zirconate 6 wt%-8 wt%, Yu Weihuan Oxygen resin.

In the present invention, due to being provided with thermal-arrest sheath on the shielding layer, thus shielded layer and thermal-arrest sheath it Between form heat collector cavity, heat collector cavity leads to cable outer surface further through heat release hole and is connected with the external world, heat release hole realize cable core fever It measures and is exchanged with extraneous；Power cable can generate a large amount of heat during conveying electric energy, can be by heat release hole by this portion Divide heat to shed in time, not only ensure that the high efficiency of transmission of electric energy, but also effectively prevent the aging of cable insulation, extend The service life of cable.Again since steel band shielded layer is mutually to overlap to be wrapped in cable core by wave mode overlay segment of the shielding with two sides It above constitutes, the shielding band of this structure overlaps accurate positioning, and it is firm to overlap, and the tension and Duplication of shielded layer can obtain essence Quasi- control, is convenient for overmolded, high production efficiency, is conducive to the reduction of cables manufacturing cost, which also to shield The two sides of band are reliable always and closely overlapped fitting, avoid shielding band overlap joint side fold and dehisce and contact gap Generation, constitute more tight reliable shield effectiveness, efficiently avoid inside cable core conductor outside the radiation of electromagnetic signal It lets out, reduces power cable to the electromagnetic interference of electrical equipment around.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 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 cable core conductor are twisted by several rare earth aluminium alloy silks.It realizes The aluminium of power cable saves a large amount of copper resource for copper, and rare earth aluminium alloy silk twisted synthesizing cable can improve the flexibility of power cable, just In laying installation.

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 heat-resistant pressure-resistant cable is described further with reference to the accompanying drawings and detailed description.

Fig. 1 is a kind of cross section structure schematic diagram of specific embodiment of the utility model heat-resistant pressure-resistant cable；

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

Fig. 3 is the expansion cross section structure schematic diagram of metal armor layers armouring tape in Fig. 1 illustrated embodiment；

Fig. 4 is the overlooking structure diagram for implementing structure shown in Fig. 3.

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-armouring tapes, 15-steel band lap segments, 16-interlocking boss, 17-boarding holes, 18- Punching press boss.

Specific embodiment

The cable core of heat-resistant pressure-resistant cable as shown in Figure 1, the power cable is made of three cable core conductors 1, 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, is being led Insulating layer of conductor 3 is coated on body shielded layer 2, which is extruded by high-density polyethylene material.Three cable cores The insulation core wire that conductor 1 and its conductor shield 2 and insulating layer of conductor 3 are constituted is embedded in filled layer 4, and filled layer 4 is by glass Glass cordage is filled, which makes three insulated electric conductor stabilized structures in filled layer, shape rounding, and can increase electricity 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.In band It is successively coated with shielded layer 6, thermal-arrest sheath 7, metal armor layers 11, oversheath 12, rare earth flame retardant coating 13 inside-out on layer 5, Thermal-arrest sheath 7 and oversheath 9 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 overmolding to the armouring tape 14 of metal armor layers 8 as shown in Figure 3, Figure 4, the thickness H of the armouring tape 14 is 0.8 ㎜, width L=50 ㎜.Steel band lap segment 15, the width L of steel band lap segment 15 are equipped in the two sides of armouring tape 14₁=6㎜； When molding, the steel band lap segment 15 of two sides is bonded to each other overlap joint.It is rushed in the steel band lap segment 15 of 14 a side of armouring tape It is formed with boarding hole 17, boarding hole 17 is through-hole, the ㎜ of aperture φ=3；Punching has interlocking boss in other side steel band lap segment 15 16, the outer diameter of the interlocking boss 16 is 3 ㎜, and interlocking boss 16 is embedded in boarding hole 17 just at the right time when overlap joint.Steel band lap segment 15 Thickness h=0.4 ㎜, boarding hole 17 or rabbet the center of boss 16 away from for 50 ㎜；The thickness h and armouring steel of steel band lap segment 15 With 14 h/H=1/2 the ratio between thickness H.On the ontology of armouring tape 14, punching has 5 row punching boss 18, and adjacent two rows of rushes Belling platform 18 is staggered from the forward and backward direction of steel band ontology.18 center of punching press boss of same row is away from also 50 ㎜, punching The outer diameter of belling platform 18 is 3 ㎜.

Constituting cable core conductor material component includes following embodiment:

Embodiment one:

Fe:0.30 wt%, Cu:0.20 wt%, B:0.01 wt%, Mg:0.03 wt%, Si:0.05 wt%, Zr:0.10 Wt%, Ni:0.03 wt%, Ag:0.01 wt%, Cr:0.01 wt%, Mn:0.01 wt%, Ti:0.02 wt%, V:0.02 wt%, Zn:0.01 wt%, RE:0.30 wt%, Yu Wei AL and inevitable impurity.

Embodiment two:

Fe:0.60 wt%, Cu:0.30 wt%, B:0.02 wt%, Mg0.05 wt%, Si:0.10 wt%, Zr:0.15 Wt%, Ni:0.06 wt%, Ag:0.02 wt%, Cr:0.03 wt%, Mn:0.03 wt%, Ti:0.04 wt%, V:0.05 wt%, Zn:0.04 wt%, RE:0.60 wt%, Yu Wei AL and inevitable impurity.

Embodiment three:

Fe:0.450 wt%, Cu:0.25 wt%, B:0.015 wt%, Mg:0.04 wt%, Si:0.08 wt%, Zr:0.12 Wt%, Ni:0.05 wt%, Ag:0.015 wt%5, Cr:0.02 wt%2, Mn:0.02 wt%2, Ti:0.03wt%, V:0.04 Wt%, Zn:0.025 wt%, RE:0.50 wt%, Yu Wei AL and inevitable impurity.

The rare earth flame retardant coating 10 for coating and being formed on oversheath 9, the rare earth material component of the rare earth flame retardant coating 10 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.

Claims (6)

1. a kind of heat-resistant pressure-resistant cable, including cable core and filled layer (4), cable core are embedded in filled layer (4)；The cable core is by three Cable core conductor (1) is constituted, and conductor shield (2) and insulating layer of conductor (3) are successively coated on every cable core conductor (1), Belting layer (5) are surrounded on the cable core and filled layer (4), it is characterised in that: are successively wrapped inside-out on the belting layer (5) It is covered with shielded layer (6), thermal-arrest sheath (7), metal armor layers (11), oversheath (12), rare earth flame retardant coating (13)；In the shielding Heat collector cavity (8) are provided between layer (6) and thermal-arrest sheath (7), which leads to cable appearance by heat release hole (10) Face；Armouring tape (14) mutually coats metal armor layers (11) described in overlap to form by the steel band lap segment (15) of two sides, Boarding hole (17) are equipped in the steel band lap segment (15) of armouring tape (14) side, the steel band of armouring tape (14) other side is taken It connects section (15) and is equipped with interlocking boss (16), the interlocking boss (16) is embedded in boarding hole (17) when overlap joint.

2. heat-resistant pressure-resistant cable according to claim 1, it is characterised in that: the heat release hole (10) passes through thermal-arrest sheath (7), metal armor layers (11), oversheath (12) and rare earth flame retardant coating (13)；Heat release hole (10) one end is connected to heat collector cavity (8), Heat release hole (10) other end leads to cable outer surface.

3. heat-resistant pressure-resistant cable according to claim 1 or 2, it is characterised in that: the heat release hole (10) is along thermal-arrest sheath (7), the circumferential direction of metal armor layers (11), oversheath (12) and rare earth flame retardant coating (13) is uniformly distributed.

4. heat-resistant pressure-resistant cable according to claim 1, it is characterised in that: the two of armouring tape (14) width direction Side is steel band lap segment (15), h/H=1/2 the ratio between thickness H of the thickness h of steel band lap segment (15) and armouring tape (14)；Armouring Interlocking boss (16), the steel band overlap joint of armouring tape (14) other side are provided in the steel band lap segment (15) of steel band (14) side Boarding hole (17) are provided in section (15), which matches with boarding hole (17) shape.

5. heat-resistant pressure-resistant cable according to claim 4, it is characterised in that: along length on armouring tape (14) ontology Direction punching has several row punching boss (18), and the punch forming of adjacent two row punchings boss (18) is contrary.

6. heat-resistant pressure-resistant cable according to claim 1, it is characterised in that: the cable core conductor (1) is by several rare earth aluminium Alloy wire is twisted.