CN205666087U - Pre -branching cable - Google Patents

Abstract

The utility model relates to a pre -branching cable relates to power cable technical field, has leader cable and branch cable among the prior art and connects the protective layer that the position outsourcing covers and come off easily in the conflagration for solving, takes not dao and protects the technical problem that pre -branching cable connection position acted on and design. This pre -branching cable includes and connects leader cable and branch cable in branch joint through the connecting piece, branch joint is pottery polyolefin branch joint. The utility model discloses a pottery polyolefin branch joint can generate hard pottery form duricrust in the conflagration, the duricrust has the thermal -insulated fire characteristic that separates, the connection position that can protect leader cable and branch cable does not receive the influence of conflagration.

Description

A kind of pre-branched cable

Technical field

This utility model relates to power cable technical field, especially relates to a kind of pre-branched cable.

Background technology

Along with the strong growth of Chinese national economy, various capital constructions, the speed of development of real estate are accelerated, with electric power electricity Cable is inevitable as in various buildings, facility, backbone is joined in confession.Therefore, construction unit, designing unit, undertake the construction of unit in charge of construction all Finding that more advanced, more cost effective, performance is more superior, to take the useful space less, construction period shorter For power distribution construction technology and method.Pre-branched cable be a kind of factory when producing main cable by prefabricated point of user's design drawing The cable of branch line, is a New Product in recent years, have power supply reliable, easy for installation, water resistance is good, account for building sides The advantage such as long-pending little, failure rate is low, low price, freedom from repairs maintenance, is widely used in upper mesophere building, residential building, mall, guest Vertical supply in shop, hospital's electric shaft, is also applied for the electric power systems such as tunnel, airport, bridge, highway.Just such Under the conditions of history environment, pre-branched cable enters China's architectural electricity stage in big strides.

Owing to pre-branched cable is mainly used in people intensive place or valuables storage place, so to pre-branched cable Fire protecting performance and safety have higher requirement.In pre-branched cable, the connecting portion of leader cable and branch cable is in cable The most impaired position, common pre-branched cable is typically coated with layer protective layer, during breaking out of fire, protection outside connecting portion Layer comes off from connecting portion after being easily burned, thus loses the effect of protection pre-branched cable connecting portion, it is impossible to ensure fire What in the case of calamity, electric power and information controlled is unimpeded, and escape and the survival of personnel in fire are caused significant obstacle.

Utility model content

The purpose of this utility model is to provide a kind of pre-branched cable, with solve present in prior art leader cable and The protective layer of the outside cladding of branch cable connecting portion the most easily comes off, and does not has protection pre-branched cable connecting portion Effect, it is impossible to ensure that electric power and information control unimpeded technical problem under fire condition.

This utility model is a kind of pre-branched cable, including leader cable and branch cable, described leader cable and described branch Cable is connected in branch joint, and described leader cable and described branch cable are connected to by connecting piece in described branch joint Together, described branch joint is ceramic polyolefin branch joint.

Further, described leader cable and described branch cable all include that cable core, described cable core include cable Conductor and the insulating barrier being coated on outside described cable conductor, be surrounded with fireprotection layer outside described insulating barrier.

Further, described fireprotection layer is Ceramic silicon rubber composite band fireprotection layer.

Further, described cable core twisted synthesizing cable, the described cable core of stranding is coated with cable jacket, institute Stating cable jacket is polyolefin oversheath.

Further, it is coated with sealing coat after described cable core stranding and between described cable jacket.

Further, described sealing coat is aluminum sealing coat.

Further, described branch joint external pressure is cast with aluminum containment vessel.

Further, ceramic fire-proof mud coating is scribbled outside described aluminum containment vessel.

Further, described connecting piece is c-type connecting piece.

Further, the heat radiation of alkali-free glass fiber yarn it is filled with after described cable core twisted synthesizing cable and between described sealing coat Layer.

This utility model provide a kind of pre-branched cable, manufacturer produce main cable time according to user's design drawing The cable of paper prefabricated branch line, is fixed on the fixed position of leader cable by branch cable by connecting piece, then leader cable with The connecting portion of branch cable is processed into ceramic polyolefin branch joint, and such as, the mode of being processed into can use pressure injection Mode.The connecting portion of leader cable and branch cable is sealed including protection by branch joint, during breaking out of fire, and ceramic polyolefin Branch joint can generate hard ceramic-like duricrust under flame calcination or hot conditions, and duricrust does not melts, do not drips, and can resist Water spray, and there is heat insulation, fire insulation characteristic, the connecting portion of protection leader cable and branch cable is not affected by fire.And then What under guarantee fire condition, electric power and information controlled is unimpeded, strives for the quality time for personnel escape and fire-fighting and rescue.

Additionally, this utility model is by insulating barrier outer cladding fireprotection layer, the cable core outer cladding sealing coat of stranding, enter One step strengthens the fire prevention of pre-branched cable, fire resistance.By filling alkali-free glass between the cable core and sealing coat of stranding Fine yarn heat dissipating layer, makes to form good fire prevention, heat insulation, heat radiation circulation between multi-layer fireproofing protective layer and heat radiation protection layer, makes electricity Cable will cause cable internal temperature more and more higher because of dispelling the heat in a fire, ultimately results in the damage of cable.Additionally The fireprotection layer of this utility model employing, sealing coat, cable jacket etc. the most all will not produce smog and toxic gas, for In fire, the escape of personnel creates condition, and human body will not be caused secondary injury.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, below by right In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The pre-branched cable connection diagram that Fig. 1 provides for this utility model embodiment；

Fig. 2 is the B-B cross-sectional structure schematic diagram of pre-branched cable in Fig. 1；

Fig. 3 is the close-up schematic view in Fig. 2 at A.

Reference:

1-leader cable 2-branch cable 3-branch joint

11-cable core 12-sealing coat 13-cable jacket

111-cable conductor 112-insulating barrier 113-fireprotection layer

31-connecting piece

Detailed description of the invention

Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality Novel protected scope.

In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Language concrete meaning in this utility model.

The present embodiment is a kind of pre-branched cable, and as depicted in figs. 1 and 2, this pre-branched cable includes leader cable 1 and branch Cable 2, leader cable 1 and branch cable 2 are connected in branch joint 3, and leader cable 1 and branch cable 2 pass through in branch joint 3 Connecting piece 31 links together, and branch joint 3 is ceramic polyolefin branch joint.

First, manufacturer can select the cable when producing main cable according to user's design drawing prefabricated branch line, Branch cable 2 is fixed on the fixed position of leader cable 1, then in the connection of leader cable 1 with branch cable 2 by connecting piece 31 Ceramic polyolefin is processed at position, and being formed internal is solid branch joint 3, and branch joint 3 is by leader cable 1 and branch's electricity The connecting portion of cable 2 seals including protection.During breaking out of fire, ceramic polyolefin branch joint is at flame calcination or high temperature bar Can generate hard ceramic-like duricrust under part, duricrust does not melts, does not drips, and the section after crust can produce uniform micropore. The ceramic polyolefin of " ceramic " and the micropore of generation thereof in addition to there is the electric isolution performance of excellence, also have fabulous every Oxygen effect of heat insulation, it is possible to be effectively isolated the thermal-flame infringement to line-internal, delay the decomposition of internal material, it is to avoid conductor exists Flame fuses, internal wiring can be protected not affected by fire, it is ensured that under fire condition electric power and information control unimpeded.

Needing exist for illustratively, " ceramic " refers to add in high molecular polymer functional material, at high temperature aerobic Or in the case of anaerobic, sinter adamantine ceramic-like housing supporter into.Ceramic material is not single at " pottery Change " after just have fire-resistant and insulation effect, ceramic material has good insulating properties before burning, on the initial rank burnt Section, become the porcelain initial stage and during becoming porcelain, and after one-tenth porcelain, all there is good insulating properties and fire resistance, be not to become porcelain completely Rear just possessed fire resistance and insulating properties.

Additionally, ceramic polyolefin can water resistant be sprayed after calcination or high-temperature heating " ceramic ", this ensures that fire When middle fire-fighting and rescue is to cable sprinkling fire, branch joint 3 still can protect cable connecting part position, will not drench because of after calcination Water and come off from cable, lose its protective effect, make cable still can normally work.Ceramic polyolefin belong to low cigarette without Halogen, heavy metal free, nonpoisonous and tasteless product, will not produce smog and harmful gas after burning, during breaking out of fire, personnel will not be by cigarette Mist and toxic gas affect and lose and most preferably flee from chance, also will not be because of cable fire by secondary injury, in fire The escape of personnel creates good condition.

As shown in Figures 2 and 3, in the present embodiment, leader cable 1 and branch cable 2 all include cable core 11, cable core 11 include cable conductor 111 and the insulating barrier 112 being coated on outside cable conductor 111, are surrounded with fireprotection layer 113 outside insulating barrier 112.

At cable conductor 111 outer cladding one layer insulating 112, insulating barrier 112 can be by the cable conductor 111 of conduction with outer Boundary's isolated insulation, it is ensured that the use safety of user, also plays a protective role to cable conductor 111 simultaneously.

The insulating barrier 112 selected in view of pre-branched cable does not typically possess fire prevention, fire-resistant performance, in a fire insulating barrier 112 can be burned, it is impossible to play the effect of protection cable conductor 111.Therefore at the outer wrapped one layer of fireprotection layer 113 of insulating barrier 112, Can protect in fireprotection layer 113 by insulating barrier 112, during breaking out of fire, fireprotection layer 113 directly and flame contact, is possible to prevent There is burning or by high temperature failure in insulating barrier 112 and direct flame contact, thus protects the core electricity of cable further Cable core 11 can keep electric power and information control action in a fire.

Additionally, the most soft protective layer of insulating barrier 112 that pre-branched cable is selected, these materials directly connect with the external world The lost of life of insulating barrier 112 can be caused by the damage of external mechanical, moisture, chemical substance, light etc., even cannot time tactile Play its due effect.Fireprotection layer 113, around being wrapped in outside insulating barrier 112, can also play the protection to insulating barrier 112 at ordinary times and make With, extend its service life.

Fireprotection layer 113 can be with Ceramics SiClx rubber composite belt fireprotection layer.First, Ceramic silicon rubber composite band is having Can form ceramic-like housing under conditions of flame or nonflame high temperature, in case of fire, " ceramic " hard housing can rise To the most fire-retardant, fire-resistant, fire prevention, the effect of fire insulation, can unimpeded with effective guarantee cable run.It addition, pottery SiClx rubber Glue composite band is waterproof, nonhygroscopic, also can be born Water spray by after calcination " ceramic ", when fire department is to cable sprinkling fire Time so that place's fireprotection layer 113 in a fire still can well protect cable core 11, plays its due fire prevention and makees With.

Secondly, Ceramic silicon rubber composite band is soft when being not affected by flame calcination or high-temperature baking, this and electricity The most bending deformed requirement of cable is consistent, it is ensured that cable arbitrarily changes with design route when installing； Ceramic silicon rubber composite band good mechanical performance, electrical insulation capability are excellent, can function as while fireproof jointing sheath Insulating protective layer, strengthens cable core 11 and outside insulating properties further.

Additionally, Ceramic silicon rubber composite band is by cigarette low after calcination, Halogen, without phosphorus nitrogen, heavy metal free, nontoxic, harmless, right Human body does not results in secondary injury.It is known that during the local breaking out of fire of the densely populated place such as skyscraper, the injures and deaths one of personnel As be not as the direct calcination of big fire and cause, but due to the smog of object burning release and toxic gas cause personnel suffocate into And causing death, the Ceramic silicon rubber composite band insulating barrier that therefore will not produce toxic smog after selective combustion is the heaviest Want.

As in figure 2 it is shown, in the present embodiment after cable core 11 twisted synthesizing cable, the cable core 11 of stranding is coated with cable Oversheath 13, cable jacket 13 can be polyolefin oversheath.

In the cable core 11 of stranding is coated on by cable jacket 13, it is carried out protective effect.Polyolefinic raw materials is rich Richness, cheap and be easily worked molding；Polyolefin relative density is little, chemical proofing, water-tolerant, has good machine Tool intensity, electrical insulating property etc..Using polyolefin oversheath as cable jacket 13, all parts of its inside can be protected Protect, prevent it from being damaged by external factor.Additionally, toxic gas will not be produced after the burning of polyolefin oversheath, will not be to fire Personnel in calamity cause secondary injury, and the rescue for personnel escape and fire-fighting troop creates conditions.

As in figure 2 it is shown, the present embodiment can be coated with after cable core 11 stranding and between cable jacket 13 every Absciss layer 12.

Now directly contact with sealing coat 12 endosexine is the fireprotection layer 113 being coated on outside insulating barrier 112, though fire prevention Layer 113 is under common soft condition, and under the protective effect of sealing coat 12, fireprotection layer 113 and its interior insulating barrier 112 are not Directly can directly contact with the external world, also would not be damaged by extraneous undesirable element, thus extend the use longevity of insulating barrier 112 Life.It is coated with sealing coat 12, it is also possible to be isolated from the outside by fireprotection layer 113 so that it is from outward becoming the cable core 11 pulled The damage of boundary's machinery, moisture, chemical substance, light etc..Additionally, during breaking out of fire, sealing coat 12 can also be by fireprotection layer 113 and fire Flame isolate, protected from the calcination of flame, and then complete the protection to cable core 11, thus realize extend cable life with And cable in a fire properly functioning.

As in figure 2 it is shown, the sealing coat 12 in the present embodiment can be aluminum sealing coat.First, aluminum has ductility, can be by Being processed into variously-shaped thin layer, manufacturing process is simple and convenient and can complete the effect of its insulation blocking.

Secondly, aluminum is the light metal that a kind of density is less, at one layer of aluminum sealing coat of cable core 11 outer cladding of stranding, no Can more increase the weight of pre-branched cable.For the cable aloft set up, aluminum sealing coat can reduce cable deadweight Impact, also makes people's electricity consumption safer while decreasing the requirement of spanning equipment；Aluminum is active metal, is being dried Can form one layer of dense oxidation film in air or humid air, this oxide-film is possible to prevent aoxidizing further and having resistance to of aluminum The effect of water, this allows for aluminum sealing coat and is hardly damaged, and service life is longer；Aluminum has good heat conductivity, as isolation Heat radiation protection layer is can function as, the heat biography during cable is used and during breaking out of fire, cable within while protective layer Pass and play an important role；Aluminium element is the metallic element that in the earth's crust, content is the abundantest, cheap, will not too much increase cable Cost, thus alleviate the consumption pressure of user.In sum, our aluminium material is as sealing coat 12.

As in figure 2 it is shown, the present embodiment can also be cast with aluminum containment vessel at branch joint 3 external pressure.Branch joint 3 is pottery Change polyolefin branch joint, at its outside one layer of aluminum containment vessel of die casting, can protected from further machinery, chemical substance, The damage of light etc., plays a protective role to internal wiring.

About aluminium material as containment vessel, before the characteristic of aluminum is had been described in detail, the most no longer Repeat.

As in figure 2 it is shown, ceramic fire-proof mud coating can be scribbled outside containment vessel in the present embodiment.Ceramic fire-proof mud is A kind of flexible flame retardant material, this putty does not solidifies, and plasticity is relatively strong, i.e. sealing is good, can be sealed by containment vessel and protect Protect in coating；In addition ceramic fire-proof mud also has advantage acidproof, alkaline-resisting, corrosion resistant, can resist in external environment condition Soda acid corrodes.Ceramic fire-proof mud fire endurance is high, the amount of being fuming is low；When ceramic fire-proof mud is by high temperature sintering, will " pottery Change " it is duricrust, the containment vessel of its inside is played protection, fire prevention, fire-resistant effect, also will not produce harmful cigarette Mist, creates conditions for the escape etc. of personnel in fire.

As it is shown in figure 1, connecting piece 31 is c-type connecting piece.According to leader cable 1 and the thickness of branch cable 2, size is selected to close Suitable c-type connecting piece, leader cable 1 is needed the cable conductor 111 connected to need the electricity being connected with branch cable 2 by c-type connecting piece Cable conductor 111 is crimped together, and simple to operate and cable does not haves the defect such as alice, be full of cracks.

The present embodiment can also be filled after cable core 11 twisted synthesizing cable and between sealing coat 12 alkali-free glass fiber yarn dissipate Thermosphere.When cable meet with fire time, the temperature of Exterior cable is higher than the temperature within cable, rationally arrange cable heat conduction, Heat radiation protection layer, is possible to prevent the incoming cable of high temperature ecto-entad of Exterior cable, thus avoids the too high cause of cable internal temperature Make the core within cable sustain damage, and then ensure that cable can normally work in a fire.

The main component of alkali-free glass fiber yarn is silicon dioxide, is a kind of highly stable inorganic material, nontoxic, heat-resisting Temperature is high, will not produce harmful flue gas after being heated；The section of alkali-free glass fiber yarn is cylindrical, fills into after pulling, every yarn it Between have space, there is good heat-blocking action, can hinder outside the incoming cable of heat inside；Between alkali-free glass fiber yarn is axial Gap can also form air duct, and this passage can also play good thermolysis, the heat produced when cable is properly functioning Itself can be dispelled the heat by these passages and alkali-free glass fiber yarn, the heat that during fire, exterior conductive is come in can also pass through These passages and glass fibre yarn conduct.It is too high that this just effectively prevent cable internal temperature in fire, affects cable normal The problem run.

Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new The scope of type each embodiment technical scheme.

Claims (5)

1. a pre-branched cable, including leader cable (1) and branch cable (2), described leader cable (1) and described branch cable (2) it is connected in branch joint (3), it is characterised in that described leader cable (1) and described branch cable (2) connect in described branch Being linked together by connecting piece (31) in head (3), described branch joint (3) is ceramic polyolefin branch joint；

Described leader cable (1) and described branch cable (2) all include that cable core (11), described cable core (11) include cable Conductor (111) and be coated on described cable conductor (111) insulating barrier (112) outward, described insulating barrier is surrounded with fire prevention outside (112) Layer (113)；

Described cable core (11) twisted synthesizing cable, the described cable core (11) of stranding is coated with cable jacket (13), institute Stating cable jacket (13) is polyolefin oversheath, after described cable core (11) stranding and between described cable jacket (13) It is coated with sealing coat (12)；

Described branch joint (3) external pressure is cast with aluminum containment vessel, scribbles ceramic fire-proof mud coating outside described aluminum containment vessel.

Pre-branched cable the most according to claim 1, it is characterised in that described fireprotection layer (113) is Ceramic silicon rubber Composite band fireprotection layer.

Pre-branched cable the most according to claim 1 and 2, it is characterised in that described sealing coat (12) is aluminum sealing coat.

Pre-branched cable the most according to claim 3, it is characterised in that described connecting piece (31) is c-type connecting piece.

Pre-branched cable the most according to claim 3, it is characterised in that with institute after described cable core (11) twisted synthesizing cable State and between sealing coat (12), be filled with alkali-free glass fiber yarn heat dissipating layer.