CN203480863U - Ready-made branch cable - Google Patents
Ready-made branch cable Download PDFInfo
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- CN203480863U CN203480863U CN201320467865.XU CN201320467865U CN203480863U CN 203480863 U CN203480863 U CN 203480863U CN 201320467865 U CN201320467865 U CN 201320467865U CN 203480863 U CN203480863 U CN 203480863U
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Abstract
A ready-made branch cable comprises a main cable, a branch cable and a branch sheath, wherein each main cable body comprises multi-group main rare earth aluminum alloy main conductors, each main cable body is of a round compacted annealing structure and wrapped with an insulating layer on the external surface, and the groups of the main rare earth aluminum alloy main conductors with the insulating layers are wrapped with a main outer sheath; each branch cable body comprises multi-group branch rare earth aluminum alloy main conductors, each branch cable body is of a round compacted annealing structure and wrapped with an insulating layer on the external surface, and the groups of the branch rare earth aluminum alloy main conductors with the insulating layers are wrapped with a branch outer sheath; at least two tap joint connecting pieces are disposed in the branch sheath; and two groups of the branch rare earth aluminum alloy main conductors and the main rare earth aluminum alloy main conductors are compressed and connected by the two C-shaped connecting bodies, the two C-shaped connecting bodies are not disposed side by side, and an insulation distance is kept between the two C-shaped connecting bodies. Perfect electrical connection performance and mechanical connection performance are ensured for connection of the main cable and the branch cable.
Description
Technical field
The utility model relates to a kind of pre-branch power cable, is specially adapted to use in the environment such as rated voltage 1kV and following skyscraper, hotel, hospital, office block.
Background technology
In recent years, along with country greatly develops Urbanization Construction, skyscraper continues to bring out, the distribution line mode of traditional common power cable can not commensurate structure complexity the modern low-voltage distribution system technological improvement of skyscraper and the requirement of construction, pre-branch power cable is for coordinating the derivative complete sets of products of electric power system such as urban skyscraper, be widely used in skyscraper, special in occasions such as hospital, residential quarter, hotel, office block, financial centers.Yet existing pre-branch power cable technology generally adopts copper core conductor, is still confined at present single-core cable.
What it must be admitted that is, although the cable of copper core conductor has promoted development and the progress of cable industry to a certain extent, but because China is not Yi Ge copper resource-rich country, relax in recent years copper mining but the backward problem of processing technology, extreme consumption and the waste of copper resource have been caused, only have according to statistics 30% copper volume production to go out, about 40% copper resource is because of production technology backwardness, the reasons such as mismanagement are run off, so country also needs a large amount of copper of import every year, to meet the demand of hi-tech industry to smart copper products, the present situation of copper scarcity of resources has restricted China's economic development, for this reason, " with aluminium for copper " has become one of the important content of the technological improvement of industry that amount of copper consuming is large and product.Applicant researched and developed rare earth aluminium alloy power cable since 2010, discovery exists and is connected the undesirable problem of effect between main cable and branch cable with rare earth aluminum alloy conductor, by described syndeton, be difficult to guarantee between main cable and branch cable, to there is desirable electrical connection performance and mechanical connection performance, it is the electric conductivity between the conductor of main cable and the aluminium alloy conductor of branch cable, the electrical connection such as the insulation property of junction and shielding properties performance is undesirable, bonding strength between the conductor of main cable and the conductor of branch cable, the sealing of insulating barrier and outer protective sleeve, isolation, the electrical connection such as protective value performance is undesirable.Because the mechanical performance between aluminium and copper, machinability exist very large difference, as some the habitual electric connecting mode on copper conductor can not be applied on aluminium alloy conductor, therefore for rare earth aluminum alloy conductor, need to adopt special syndeton.
Summary of the invention
The purpose of this utility model is to overcome the defect of above-mentioned prior art, a kind of pre-branch power cable is provided, it is when adopting rare earth aluminum alloy conductor and C type copper-aluminium transition intermediate terminal to clamp connecting structure, solved the complicated connectivity problem that picks out the branch cable being synthesized by a plurality of cable group from the synthetic main cable of a plurality of cable group, can guarantee that main cable and being connected of branch cable have desirable electrical connection performance and mechanical connection performance.
For achieving the above object, the utility model has adopted following technical scheme.
A kind of pre-branch power cable, comprise main cable, branch cable and branch's sheath, every main cable comprises many group trunk rare earth aluminium alloy leading bodies, every group of trunk rare earth aluminium alloy leading body is circle and presses annealed structure, outer surface at every group of trunk rare earth aluminium alloy leading body is coated with insulating barrier, and a trunk oversheath is coated the trunk rare earth aluminium alloy leading body of respectively organizing with insulating barrier; Every branch cable comprises that multicomponent props up rare earth aluminium alloy leading body, each branch rare earth aluminium alloy leading body is circle and presses annealed structure, at the outer surface of each branch rare earth aluminium alloy leading body, be coated with insulating barrier ，Yi Ge branch oversheath each group of branches rare earth aluminium alloy leading body with insulating barrier is coated.At least two tap connectors are set in described branch sheath: a C type connected body, the 2nd C type connected body; The one C type connected body is the first group of branches rare earth aluminium alloy leading body and corresponding first group of trunk rare earth aluminium alloy leading body crimping, and the 2nd C type connected body props up rare earth aluminium alloy leading body and corresponding second group of trunk rare earth aluminium alloy leading body crimping by second component; The one C type connected body and the 2nd C type connected body are not placed side by side, and maintain insulation distance H between a C type connected body and the 2nd C type connected body.
Preferably, tap connector in described branch's sheath adopts following fixed structure: comprise at least wrapped water-proof self-adhesion insulating cement belt outside branch's rare earth aluminium alloy props up conductor, trunk rare earth aluminium alloy leading body and C type connected body of one deck, and extrude the cable PP Pipe Compound connector being formed on outside water-proof self-adhesion insulating cement belt.Specifically: in branch's sheath, the trunk oversheath of main cable is stripped from, and branch's oversheath of branch cable is stripped from; Crimping position at a C type connected body place, peel off first branch's insulating barrier outside the first group of branches rare earth aluminium alloy leading body, peel off the first trunk insulating barrier outside first group of trunk rare earth aluminium alloy leading body, exposed the first trunk rare earth aluminium alloy leading body, first branch's rare earth aluminium alloy are propped up to conductor and a C type connected body back and forth coated by multilayer flashing insulating tape structure in the lump; Crimping position at the 2nd C type connected body place, peel off second component and prop up second branch's insulating barrier outside rare earth aluminium alloy leading body, peel off the second trunk insulating barrier outside second group of trunk rare earth aluminium alloy leading body, by the second exposed trunk rare earth aluminium alloy leading body, to prop up conductor and the 2nd C type connected body at second branch's rare earth aluminium alloy back and forth coated by multilayer flashing insulating tape structure in the lump; Injection moulding or extrude described branch sheath outside the waterproof insulation tape structure of two tap connectors.
Preferably, be coated on the position of each crimping in branch's sheath 8, as a C type connected body and the 2nd C type connected body, length direction along main cable 3 is staggered respectively, and the described outer jacket that trunk rare earth aluminium alloy is propped up to conductor 1, the length range that insulating barrier is successively peeled off are 30-70cm.
Preferably, described C type connected body is C type copper-aluminium transition intermediate ends sub-folder.
Preferably, described crimping adopts the crimping structure of parallel contact.
Preferably, describedly respectively organize trunk rare earth aluminium alloy leading body 1, each group of branches rare earth aluminium alloy leading body 2 insulating barriers adopt crosslinked polyetylene insulated layer or polyvinyl chloride insulation layers.
Preferably, described branch's sheath 8 adopts closely knit the extruding of pvc sheathing compound to make.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of pre-branch power cable of the present utility model.
Fig. 2 is the mounting structure of pre-branch power cable of the present utility model.
In Fig. 1 to Fig. 2:
1-trunk rare earth aluminium alloy leading body; 2-branch rare earth aluminium alloy props up conductor; 3-main cable; 4-branch cable; 5-tap connector; 6-boosting metal tool; The suspension hook of 7-cross-arm; 8-branch sheath; 9-insulating barrier.
Embodiment
The embodiment providing below in conjunction with accompanying drawing 1 to 2, further illustrates the various embodiments of pre-branch power cable of the present utility model.Pre-branch power cable of the present utility model is not limited to the description of following examples.
In Fig. 1, illustrated from 4 core main cables and divided the structure that picks out 2 core branch cables, in the present embodiment, only adopted Liao Yige branch sheath just to realize the function of 4 core main cable tap 2 core branch cables.
Pre-branch power cable of the present utility model comprises a plurality of tap connectors 5 of main cable 3, branch cable 4 and branch cable 4 and main cable 3 as shown in Figure 1, 2, as shown in Figure 2, the upper end of described main cable 3 is connected with one end of boosting metal tool 6, the other end of boosting metal tool 6 be articulated in support and the suspension hook 7 of the cross-arm of fixing described pre-branch power cable on.Wherein, main cable 3 comprises many group trunk rare earth aluminium alloy leading bodies 1, and in 4 core main cables shown in Fig. 1, main cable 3 has comprised 4 groups of trunk rare earth aluminium alloy leading bodies 1.Branch cable 4 comprises that multicomponent props up rare earth aluminium alloy and props up conductor 2, and in 2 core branch cables shown in Fig. 1, branch cable 4 has comprised 2 group of branches rare earth aluminium alloy leading bodies 2.Described trunk rare earth aluminium alloy leading body 1 and branch's rare earth aluminium alloy prop up conductor 2 and are circle and press annealed structure, and all can adopt AA8176 type aluminum alloy material, and by increasing the alloying elements such as rare earth, optimize its electric property on this basis.The outer surface that described every group of trunk rare earth aluminium alloy leading body 1 and branch's rare earth aluminium alloy prop up conductor 2 is coated with respectively insulating barrier 9 from the inside to surface, at 4 groups of trunk rare earth aluminium alloy leading bodies 1 with insulating barrier 9, be wrapped with 1 layer of trunk external sheath layer as shown in Figure 1,2 groups of branch's rare earth aluminium alloy leading body 2 outer wrapping with insulating barrier 9, also have 1 layer of branch's external sheath layer.Preferably, insulating barrier 9 can adopt crosslinked polyetylene insulated layer or polyvinyl chloride insulation layer.Described branch cable 4 is 2 C type connected bodies with the tap connector 5 of main cable 3, i.e. a C type connected body and the 2nd C type connected body.Certainly in other embodiments, main cable can be 2 cores, 3 cores, 4 cores or more, and branch cable can be also 2 cores, 3 cores, 4 cores or multicore more, and the tap connector 5 in branch cable also can be 3 or 4.
Tap connector 5 has the C type connected body of C shape structure for cross section, and longitudinally there is certain length at the cross section perpendicular to described, in this length, hold trunk rare earth aluminium alloy leading body 1 and prop up the overlapping of conductor 2 with branch's rare earth aluminium alloy, trunk rare earth aluminium alloy leading body 1 and branch's rare earth aluminium alloy are propped up in the staggered in the longitudinal direction C of the being arranged on shape of conductor 2 structure.Each branch rare earth aluminium alloy prop up conductor 2 by a C type connected body respectively with corresponding trunk rare earth aluminium alloy leading body 1 crimping, and maintain insulation distance between the position of each crimping.
In embodiment as shown in Figure 1, in branch's sheath 8, comprise 5: the C type connected bodies of two tap connectors and the 2nd C type connected body, the one C type connected body is by first group of trunk rare earth aluminium alloy leading body 1 of main cable, the first group of branches rare earth aluminium alloy leading body 2 crimping of branch cable, the one C type connected body is by first group of trunk rare earth aluminium alloy leading body 1 of main cable, the first group of branches rare earth aluminium alloy leading body 2 of branch cable is crimped on together, the 2nd C type connected body is by second group of trunk rare earth aluminium alloy leading body 1 of main cable, the second component of branch cable props up rare earth aluminium alloy leading body 2 and is crimped on together.
In this so-called crimping, by mode parallel on length direction, being arranged on rare earth aluminium alloy leading body 1 in C shape structure and rare earth aluminium alloy exactly props up conductor 2 and compresses and be connected, i.e. described crimping adopts the crimping structure of parallel contact, C type connected body compresses and is connected with a conductor 2 with leading body 1 respectively simultaneously, thereby making electric current on trunk rare earth aluminium alloy leading body 1 flow to branch's rare earth aluminium alloy by two approach props up on conductor 2, to be trunk rare earth aluminium alloy leading body 1 prop up with branch rare earth aluminium alloy the contact-making surface that the compression between conductor 2 is connected to one of them approach, another approach is that contact-making surface that electric current on trunk rare earth aluminium alloy leading body 1 is first connected with compression between C type connected body by it flows to branch's rare earth aluminium alloy and props up conductor 2, by C type connected body and branch rare earth aluminium alloy, propping up contact-making surface that the compression between conductor 2 is connected again flows to trunk rare earth aluminium alloy from C type connected body and props up conductor 2, if C type connected body adopts copper material, electric current flows to rare earth aluminium alloy from rare earth aluminium alloy leading body 1 and props up conductor 2 need through copper-aluminium transition.In fact, described C type connected body preferably adopts C type copper-aluminium transition intermediate ends sub-folder, and it has C shape intermediate terminal clamping structure and copper-aluminium transition structure simultaneously.Intermediate ends sub-folder described here is a kind of terminal with clamping force, and it is arranged on the centre of continual rare earth aluminium alloy leading body 1, it is that clamping force by intermediate ends sub-folder provides that rare earth aluminium alloy leading body 1, rare earth aluminium alloy prop up thrust that conductor 2 is connected with compression between C type connected body three.Preferably, crimping adopts the crimping structure of parallel contact.
In the embodiment of 4 core main cable tap 2 core branch cables shown in Fig. 1,2 cores of branch cable are connected respectively to a C type connected body, each core of branch cable is to consist of a group of branches rare earth aluminium alloy leading body 2, at each branch rare earth aluminium alloy leading body 2, is coated with a layer insulating.When crimping, peel off branch's oversheath of branch cable 4, and peel off first branch's insulating barrier outside the first group of branches rare earth aluminium alloy leading body 2, the first exposed group of branches rare earth aluminium alloy is propped up to conductor 2 and be crimped onto in a C type connected body; Peel off again second component and prop up second branch's insulating barrier outside rare earth aluminium alloy leading body 2, exposed second component is propped up to rare earth aluminium alloy and prop up conductor 2 and be crimped onto in the 2nd C type connected body.Corresponding with it, the trunk oversheath of main cable 3 is peeled off, and by first group of trunk insulation displacement of the first group trunk rare earth aluminium alloy leading body 1 corresponding with the first group of branches rare earth aluminium alloy leading body 2, first group of exposed trunk rare earth aluminium alloy propped up to conductor 1 and be crimped onto in a C type connected body together with propping up conductor 2 with exposed the first group of branches rare earth aluminium alloy; Again by second group of trunk insulation displacement of propping up second group of trunk rare earth aluminium alloy leading body 1 that rare earth aluminium alloy leading body 2 is corresponding with second component, second group of exposed trunk rare earth aluminium alloy propped up to conductor 1 and exposed second component and prop up rare earth aluminium alloy and prop up together with conductor 2 and be crimped onto in a C type connected body.
Preferably, with two-layer or three layers of waterproof insulation tape structure back and forth coated each crimping the C type connected body of core, as shown in Figure 1, injection moulding or extrude the described branch of formation sheath 8 outside the waterproof insulation tape structure of two minute connector connectors.Preferred, described branch's sheath 8 can adopt closely knit the extruding of pvc sheathing compound to make.
The one C type connected body and the 2nd C type connected body are not placed side by side, and maintain insulation distance H between a C type connected body and the 2nd C type connected body.In the embodiment shown in fig. 1, the C type connected body and the 2nd C type connected body that are coated in branch's sheath 8 are staggered along the length direction of main cable 3 respectively, and described trunk rare earth aluminium alloy props up the trunk outer jacket of conductor 1, length range that insulating barrier is successively peeled off is 30-70cm.
The following describes the manufacturing process of cable of the present utility model.Conductor 1 and 2 is as shown in Figure 1, 2 respectively the conductor of main cable and branch cable, extrudes crosslinked polyetylene insulated or polyvinyl chloride insulation layer, as electric insulation layer on conductor 1 and 2; Then the wrapped nonwoven fabric belts of multicore structure stranding, extrude again polyvinyl chloride oversheath, adopt different cross-sectional area of conductor and form respectively main cable 3 and branch cable 4 totally two cables with same production technology described above, according to construction site electric installation drawing requirement, at specific length place, the outer jacket of main cable 3 and insulating barrier are successively peeled off, exposed conductor 1 and 2.By 1 of main cable, using respectively " C " type copper-aluminium transition intermediate terminal to clamp with 2 of branch cable according to corresponding same insulated wire cores color connects, reciprocal wrapped two-layer waterproof insulation self-adhesive tape, and extrude private branch CABLE MATERIALS formation connected body, and in the upper end of main cable, apply the supporters such as boosting metal tool and cross-arm suspension hook to fix whole cable weight.Referring to Fig. 2, pre-branch power cable of the present utility model also comprises annex boosting metal tool 6 and cross-arm suspension hook 7, upper end at main cable 3 is affixed by, fixedly tension string bag etc. is as boosting metal tool 6, at the overhung cross-arm suspension hook 7 of boosting metal tool 6, to support the weight of whole cable.The concrete structure of boosting metal tool 6 and cross-arm suspension hook 7 can adopt general structure.
The beneficial effects of the utility model are: conductor adopts rare earth aluminium alloy material to replace traditional copper core conductor, its electric property (D.C. resistance, ampacity, voltage drop), conductor percentage elongation etc. are all basically identical with copper conductor, not only its corrosion resistance is better than copper conductor, be beneficial to long-term use and can not cause cross-sectional area of conductor " loss ", and guarantee electric property, ampacity, conductor percentage elongation constant in the effective long-term thermal stability of guaranteeing its mechanical strength and crimping termination also, more improve cable decay resistance, guaranteed its long-term through-flow performance.In addition, the rare earth aluminum alloy conductor of this cable and C type middle transition terminal compression joint prove that by 1000 thermal cycling tests its pressure croop property, long term thermal deformability all meet standard-required.Also have, because conductor density diminishes approximately 3.3 times, whole cable weight saving approximately 40%～60%, can greatly alleviate the weight supporting degree of the utensils such as cross-arm suspension hook, boosting metal tool, metal wire clamp, extend cable and annex whole service life thereof, can guarantee that this cable can normally move more than 30 years.
Claims (8)
1. a pre-branch power cable, comprises main cable (3), branch cable (4) and branch's sheath (8), it is characterized in that:
Every main cable (3) comprises many group trunk rare earth aluminium alloy leading bodies (1), every group of trunk rare earth aluminium alloy leading body (1) is circle and presses annealed structure, outer surface at every group of trunk rare earth aluminium alloy leading body (1) is coated with insulating barrier, and a trunk oversheath is coated the trunk rare earth aluminium alloy leading body (1) of respectively organizing with insulating barrier;
Every branch cable (4) comprises that multicomponent props up rare earth aluminium alloy leading body (2), each branch rare earth aluminium alloy leading body (2) is circle and presses annealed structure, at the outer surface of each branch rare earth aluminium alloy leading body (2), be coated with insulating barrier ，Yi Ge branch oversheath each group of branches rare earth aluminium alloy leading body (2) with insulating barrier is coated;
At least two tap connectors (5) are set in described branch sheath (8): a C type connected body, the 2nd C type connected body; The one C type connected body is the first group of branches rare earth aluminium alloy leading body (2) and corresponding first group of trunk rare earth aluminium alloy leading body (1) crimping, and the 2nd C type connected body props up rare earth aluminium alloy leading body (2) and corresponding second group of trunk rare earth aluminium alloy leading body (1) crimping by second component; The one C type connected body and the 2nd C type connected body are not placed side by side, and maintain insulation distance between a C type connected body and the 2nd C type connected body.
2. a kind of pre-branch power cable according to claim 1, is characterized in that: in branch's sheath (8), the trunk oversheath of main cable (3) is stripped from, and branch's oversheath of branch cable (4) is stripped from;
Crimping position at a C type connected body place, peel off first outer branch's insulating barrier of the first group of branches rare earth aluminium alloy leading body (2), peel off the first outer trunk insulating barrier of first group of trunk rare earth aluminium alloy leading body (1), exposed the first trunk rare earth aluminium alloy leading body (1), first branch's rare earth aluminium alloy are propped up to conductor (2) and a C type connected body is back and forth coated by two-layer waterproof insulation tape structure in the lump;
Crimping position at the 2nd C type connected body place, peel off second component and prop up second outer branch's insulating barrier of rare earth aluminium alloy leading body (2), peel off the second outer trunk insulating barrier of second group of trunk rare earth aluminium alloy leading body (1), by the second exposed trunk rare earth aluminium alloy leading body (1), prop up conductor (2) and the 2nd C type connected body is back and forth coated by two-layer waterproof insulation tape structure in the lump at second branch's rare earth aluminium alloy;
Injection moulding or extrude described branch sheath (8) outside the waterproof insulation tape structure of two tap connectors.
3. pre-branch power cable according to claim 1, it is characterized in that: the C type connected body and the 2nd C type connected body that are coated in branch's sheath (8) are staggered along the length direction of main cable (3) respectively, and described trunk rare earth aluminium alloy props up the trunk outer jacket of conductor (1), the length range that insulating barrier is successively peeled off is 30-70cm.
4. pre-branch power cable according to claim 1, is characterized in that: described C type connected body is C type copper-aluminium transition intermediate ends sub-folder.
5. pre-branch power cable according to claim 1, is characterized in that: described crimping adopts the crimping structure of parallel contact.
6. pre-branch power cable according to claim 1, is characterized in that: described insulating barrier adopts crosslinked polyetylene insulated layer or polyvinyl chloride insulation layer.
7. pre-branch power cable according to claim 1, is characterized in that: described branch's sheath (8) adopts closely knit the extruding of pvc sheathing compound to make.
8. pre-branch power cable according to claim 1, it is characterized in that: the upper end of described main cable (3) is connected with one end of boosting metal tool (6), the other end of boosting metal tool (6) be articulated in support and the suspension hook (7) of the cross-arm of fixing described pre-branch power cable on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467865.XU CN203480863U (en) | 2013-08-01 | 2013-08-01 | Ready-made branch cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467865.XU CN203480863U (en) | 2013-08-01 | 2013-08-01 | Ready-made branch cable |
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| Publication Number | Publication Date |
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| CN203480863U true CN203480863U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320467865.XU Expired - Lifetime CN203480863U (en) | 2013-08-01 | 2013-08-01 | Ready-made branch cable |
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| CN (1) | CN203480863U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471016A (en) * | 2018-05-17 | 2018-08-31 | 无锡华昊电器股份有限公司 | A kind of the air-tightness connector and its manufacture craft of electric vehicle harness |
| CN109384125A (en) * | 2017-08-11 | 2019-02-26 | 奥的斯电梯公司 | Bearing carrier for lifting system |
-
2013
- 2013-08-01 CN CN201320467865.XU patent/CN203480863U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109384125A (en) * | 2017-08-11 | 2019-02-26 | 奥的斯电梯公司 | Bearing carrier for lifting system |
| CN108471016A (en) * | 2018-05-17 | 2018-08-31 | 无锡华昊电器股份有限公司 | A kind of the air-tightness connector and its manufacture craft of electric vehicle harness |
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