CN202905213U - Aluminum alloy conductor variable-frequency cable - Google Patents

Aluminum alloy conductor variable-frequency cable Download PDF

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Publication number
CN202905213U
CN202905213U CN 201220497801 CN201220497801U CN202905213U CN 202905213 U CN202905213 U CN 202905213U CN 201220497801 CN201220497801 CN 201220497801 CN 201220497801 U CN201220497801 U CN 201220497801U CN 202905213 U CN202905213 U CN 202905213U
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CN
China
Prior art keywords
aluminium alloy
aluminum alloy
cable
conductor
alloy conductor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220497801
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Chinese (zh)
Inventor
赵艳青
鲁学
姚秀艳
高作海
朱志兰
赵飞
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SHANGHAI MORN ELECTRIC EQUIPMENT CO Ltd
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SHANGHAI MORN ELECTRIC EQUIPMENT CO Ltd
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Priority to CN 201220497801 priority Critical patent/CN202905213U/en
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Publication of CN202905213U publication Critical patent/CN202905213U/en
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Abstract

The utility model discloses an aluminum alloy conductor variable-frequency cable. The aluminum alloy conductor variable-frequency cable comprises a cable inner core and a cable outer layer, wherein the cable inner core is wrapped by the cable outer layer and comprises three-phase mainline aluminum alloy insulating wires and aluminum alloy grounding wires. The three-phase mainline aluminum alloy insulating wires are in 120-degree phase angle circumferential distribution, and the aluminum alloy grounding wires are equally divided into three parts and in 120-degree phase angle circumferential distribution around the three-phase mainline aluminum alloy insulating wires and at the same center of a circle as the three-phase mainline aluminum alloy insulating wires. The aluminum alloy conductor has the advantages of high mechanical strength, corrosion resistance and compactness. Compared with a copper conductor variable-frequency cable, the aluminum alloy conductor variable-frequency cable has the advantages that the cost can be reduced by 40%, and the product economy is high.

Description

A kind of aluminium alloy conductor frequency-changing cable
Technical field
The utility model relates to a kind of frequency-changing cable.
Background technology
Variable-frequency control technique because of its significantly energy-conservation (25-33%) effect, speed-regulating range width, have permanent power, permanent rotary speed property, power is large, reliability is high, maintenance is simple, volume is little, lightweight, floor space is little, equipment investment is low, easy to manufacture, can realize the excellent specific properties such as high automation control, and has wide marketing application prospect, frequency-changing cable has obtained promoting the use of on a large scale as the frequency control important component part.But this class cable is owing to adopting traditional copper conductor structure, and not only manufacturing process is complicated, and the stranded coefficient that presses of conductor is low, there is larger slit between the conductor single line, not only easily meets the water infiltration, cause the conductor oxidation, increase conductor DC resistance, affect the current-carrying performance of cable.The more important thing is, copper conductor involves great expense (current copper valency is up to nearly 60,000 a yuan/tons high position), and as the another kind of main material of cable conductor, aluminium is relatively cheap (forward price only is about 1.6 ten thousand yuan/tons) but.
Can with aluminium for copper, be a century difficult problem that perplexs in the industry always, with regard to its former because: although aluminium is the excellence conductor (resistivity of copper: 0.017241 Ω mm that is only second to copper 2/ m, the resistivity of aluminium: 0.028264 Ω mm 2/ m), but since aluminium exist oxidation, morphological element not closely, the easy shortcoming such as creep, when making cable with the aluminium instead of copper, tend to occur joint oxidation and loosening, cause and heating when transmission of electric energy, often occurs and the generation fault point, consider the long-term safety reliability of frequency conversion speed-adjusting system, therefore this class cable all adopted copper conductor in the past always, fast development along with modern alloy material technology, conductor uses aluminium alloy for copper, technology is ripe, has been that current frequency-conversion power cable technical development becomes.As follows with regard to its reason: aluminium alloy conductor is compared with the copper aluminium conductor, (the aluminium alloy creep-resistant property improves 300% at aluminium base plinth not only to have improved mechanical strength (the aluminium alloy pulling force is 1.3 times of aluminium), corrosion resistance (corrosion resistance of aluminium alloy is better than copper aluminium greatly) and the compactness of conductor, thoroughly avoided because the cable joint relaxation problem that cold flow or creep cause), and (aluminium alloy is higher by 30% than copper pliability, and bounce-back property is than copper low 40% to have good pliability.The bending radius of general copper cable is 10~20 times of external diameters, and the aluminium alloy cable bending radius only is 7 times of external diameters, more easily carrying out terminal connects), in the situation that possess the identical performance of copper conductor, the aluminium alloy cable cost about 40%, cable weight is lighter more than one times than copper conductor cable, and reduces by 20% left and right sides mounting and installation expense.
Comprehensively described, the economy of the frequency-changing cable of copper conductor and applicability, more and more inapplicable requirements of the times need to do further to improve.
The utility model content
The purpose of this utility model is that a kind of aluminium alloy conductor frequency-changing cable will be provided, to solve problems of the prior art.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of aluminium alloy conductor frequency-changing cable, comprise the cable inner core and wrap in the outer cable outer layer of cable inner core, it is characterized in that: described cable inner core comprises three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection, described three-phase main line aluminum alloy insulated wire is 120 ° of phase angle circle distribution, described aluminium alloy earth connection is divided into three equal parts, and is 120 ° of phase angles and three-phase main line aluminum alloy insulated wire concentric circle distribution around three-phase main line aluminum alloy insulated wire.
In an embodiment of the present utility model, described cable outer layer is followed successively by separator, screen and oversheath from inside to outside.
In an embodiment of the present utility model, be provided with inserts between described cable inner core and the cable outer layer.
In an embodiment of the present utility model, the aluminium alloy conductor of described three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection all is to piece together strand by some unit trapezoid block aluminium alloy conductor to form round conductor, adopts seamless spliced between the unit trapezoid block aluminium alloy conductor.
In an embodiment of the present utility model, the aluminium alloy conductor of described three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection all is to piece together strand by some unit secter pat aluminium alloy conductor to form round conductor, adopts seamless spliced between the unit secter pat aluminium alloy conductor.
In an embodiment of the present utility model, described screen adopts aluminum alloy strip screw winding, self-locking structure all linked with one another.
The beneficial effects of the utility model are:
⑴, the utility model are compared with copper conductor frequency-changing cable, reduce by 40% cost, and product economy is high.
⑵, the utility model have good mechanical protection effect, can bear suitable external pressure, pulling force and collision, buried-pipe laying need not poling, can directly imbed underground.
⑶, the utility model have excellent crooked flexible, and less bending radius is arranged during laying installation, conveniently lay and take up space less.
⑷, the utility model can be installed on to be needed on the mobile equipment sometimes.
⑸, the utility model have well dustproof, anticorrosion and prevent that moisture from invading the function of cable.
⑹, the utility model flame-retarding characteristic are good, can reach the A level fire resistance of IEC60332 regulation.
⑺, the utility model can effectively reduce the destruction that lightning surge causes cable and the electric equipment that links to each other.
⑻, the utility model can prevent effectively that muroid or termite from destroying cable insulation and the short circuit accident that causes.
⑼, the utility model not only Electric Field Distribution are even, and the induced voltage of the capacitance current of frequency-changing cable and screen is down to minimumly, and the loss in the delivery of electrical energy is down to minimum, and the ampacity of cable and safety operation are all effectively ensured.
⑽, the utility model make the high order harmonic component in the frequency conversion out-put supply obtain the inhibition of maximum constraints, have reduced in a large number the shaft current at motor and each transmission position, thereby have improved the useful life of motor and equipment.
⑾, the utility model have suppressed the interference of high order harmonic component to surrounding environment effectively, can guarantee near the light current facilities such as communication, signal, monitoring, control, computer and open circuit protection normal operation on every side, avoid the generation of contingency.
⑿, the utility model have higher resonance frequency, compare with other shielded type cable, when equal service condition, the permission lay length of this frequency-changing cable can prolong one times, that is to say, longer service life safer, reliable with frequency-changing cable of the present utility model, effectively avoid the danger of inverter output terminal electric current and motor terminal voltage generation resonance.
Characteristics of the present utility model can be consulted the detailed description of the graphic and following better execution mode of this case and be obtained to be well understood to.
Description of drawings
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the schematic cross-section of aluminium alloy conductor.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, further set forth the utility model below in conjunction with specific embodiment.
As shown in Figure 1, a kind of aluminium alloy conductor frequency-changing cable comprises the cable inner core and wraps in the outer cable outer layer of cable inner core.
The cable inner core comprises three-phase main line aluminum alloy insulated wire 1 and aluminium alloy earth connection 2, three-phase main line aluminum alloy insulated wire is 120 ° of phase angle circle distribution, described aluminium alloy earth connection is divided into three equal parts, and is 120 ° of phase angles and three-phase main line aluminum alloy insulated wire concentric circle distribution around three-phase main line aluminum alloy insulated wire.In the utility model, three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection all are to adopt aluminum alloy materials to make conductor, adopt aluminum alloy materials to make the mechanical strength (the aluminium alloy pulling force is 1.3 times of aluminium) that conductor has not only improved conductor, (the aluminium alloy creep-resistant property improves 300% at aluminium base plinth for corrosion resistance (corrosion resistance of aluminium alloy is better than copper aluminium greatly) and compactness, thoroughly avoided because the cable joint relaxation problem that cold flow or creep cause), and (aluminium alloy is higher by 30% than copper pliability, and bounce-back property is than copper low 40% to have good pliability.The bending radius of general copper cable is 10~20 times of external diameters, and the aluminium alloy cable bending radius only is 7 times of external diameters, more easily carrying out terminal connects), in the situation that possess the identical performance of copper conductor, the aluminium alloy cable cost about 40%, cable weight is lighter more than one times than copper conductor cable, and reduces by 20% left and right sides mounting and installation expense.In the present embodiment, as shown in Figure 2, the aluminium alloy conductor of three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection all is to piece together strand by some unit secter pat aluminium alloy conductor to form round conductor, adopt seamless spliced between the unit secter pat aluminium alloy conductor, the aluminium alloy conductor outer surface forms a smooth cylinder, mechanical performance is greatly improved, decay resistance has also obtained enhancing, and creep-resistant property has obtained effective lifting especially, has widely applicability.Certainly, the aluminium alloy conductor of three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection also can be pieced together strand by some unit trapezoid block aluminium alloy conductor and form round conductor, adopts seamless spliced between the unit trapezoid block aluminium alloy conductor.
Cable outer layer is followed successively by separator 3, screen 5 and oversheath 6 from inside to outside.Screen adopts aluminum alloy strip screw winding, self-locking structure all linked with one another, and its aluminum alloy strip cross section is " ∽ " shape.This structure provides good mechanical protection effect and excellent crooked and anti-ly pull mobile serviceability; radiation and the transmission of energy establishment high order harmonic component; reduced the shaft current at motor and each transmission position, thus the useful life of having improved motor and equipment.
Be provided with inserts 4 between cable inner core and the cable outer layer.
Above demonstration and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and the specification is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection range that the utility model requires is defined by appending claims and equivalent thereof.

Claims (6)

1. aluminium alloy conductor frequency-changing cable, comprise the cable inner core and wrap in the outer cable outer layer of cable inner core, it is characterized in that: described cable inner core comprises three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection, described three-phase main line aluminum alloy insulated wire is 120 ° of phase angle circle distribution, described aluminium alloy earth connection is divided into three equal parts, and is 120 ° of phase angles and three-phase main line aluminum alloy insulated wire concentric circle distribution around three-phase main line aluminum alloy insulated wire.
2. aluminium alloy conductor frequency-changing cable according to claim 1 is characterized in that, described cable outer layer is followed successively by separator, screen and oversheath from inside to outside.
3. aluminium alloy conductor frequency-changing cable according to claim 1 is characterized in that, is provided with inserts between described cable inner core and the cable outer layer.
4. aluminium alloy conductor frequency-changing cable according to claim 1, it is characterized in that, the aluminium alloy conductor of described three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection all is to piece together strand by some unit trapezoid block aluminium alloy conductor to form round conductor, adopts seamless spliced between the unit trapezoid block aluminium alloy conductor.
5. aluminium alloy conductor frequency-changing cable according to claim 1, it is characterized in that, the aluminium alloy conductor of described three-phase main line aluminum alloy insulated wire and aluminium alloy earth connection all is to piece together strand by some unit secter pat aluminium alloy conductor to form round conductor, adopts seamless spliced between the unit secter pat aluminium alloy conductor.
6. aluminium alloy conductor frequency-changing cable according to claim 2 is characterized in that, described screen adopts aluminum alloy strip screw winding, self-locking structure all linked with one another.
CN 201220497801 2012-09-26 2012-09-26 Aluminum alloy conductor variable-frequency cable Expired - Fee Related CN202905213U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220497801 CN202905213U (en) 2012-09-26 2012-09-26 Aluminum alloy conductor variable-frequency cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220497801 CN202905213U (en) 2012-09-26 2012-09-26 Aluminum alloy conductor variable-frequency cable

Publications (1)

Publication Number Publication Date
CN202905213U true CN202905213U (en) 2013-04-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102881358A (en) * 2012-09-26 2013-01-16 上海摩恩电气股份有限公司 Variable-frequency cable with aluminum alloy conductor
CN103928179A (en) * 2013-12-06 2014-07-16 安徽凌宇电缆科技有限公司 Low-smoke halogen-free flame-retardant aluminum alloy variable frequency cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102881358A (en) * 2012-09-26 2013-01-16 上海摩恩电气股份有限公司 Variable-frequency cable with aluminum alloy conductor
CN103928179A (en) * 2013-12-06 2014-07-16 安徽凌宇电缆科技有限公司 Low-smoke halogen-free flame-retardant aluminum alloy variable frequency cable

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130424

Termination date: 20180926

CF01 Termination of patent right due to non-payment of annual fee