由于国内电缆产品都是实行送检制度，行业内通行的给客户看的样品也无一例外都是委托礼品公司制作的，检测机构出具的报告只是对送检样品负责。如果实际供货的产品出现了问题，损害的是用户的利益。一些不良的厂商就是钻政策的空子，把其他厂家的样品换了标牌之后拿去相关检测机构检测，用正规工厂的产品当做自己的产品去做给客户看的样品，欺瞒检测机构和用户，也说自己有检验报告，样品也很漂亮，而实际供货的产品与样品相差甚远，甚至不能保证产品的质量。Aluminum alloy cable has been gradually recognized by the market, more and more users plan to choose aluminum alloy cable.
Standards and regulations lag,
In the market it is difficult to distinguish the good from the bad,
Companies that don't have the technology or equipment to make it,
The choice to the user brought great confusion.
Let's talk about it today
The following, hangzhou yijie hvac equipment co., LTD. For everyone specific summary of aluminum alloy cable production technology, equipment, process maturity, industry standards, test report and other 10 standards, aluminum alloy cable manufacturers to identify.
With the first 5, can be judged to be a qualified aluminum alloy cable manufacturers, if all 10 standards have, it is an excellent aluminum alloy cable manufacturers.
Through the above 10 standards, for how to choose an excellent aluminum alloy cable manufacturers, can make accurate judgment.
Most do not have aluminium alloy cable production technology and equipment, poor capacity, not professional manufacturers can be excluded.
Such choice of enterprise and product quality should be more safe and reliable!
1. Product quality
Aluminum alloy cable is mainly composed of conductor, insulation and armor (sheath).
(a) aluminum alloy conductor rod: see if you can independently produce high-quality aluminum alloy conductor rod
The manufacturer of current domestic production technology with independent aluminum alloy conductor is not much, have a continuous smelting, continuous casting, continuous casting and rolling of aluminum alloy conductor rod production line is a handful, if do not have independent of aluminum alloy conductor rod production capacity, to rely on processing, the so-called secret melting, or other no formal approach for aluminium alloy conductor rod, not only cannot assure the basic quality of aluminum alloy cable, nor from the source to control the quality of the cable.
In addition to the smelting, continuous casting, continuous casting and rolling of aluminum alloy conductor rod production line, but also to see the size of the continuous casting of the billet section of the production line, the larger the section, the rolled aluminum alloy rod quality is better, "good steel". Excellent aluminum alloy conductor rod is the decisive factor of the electrical and mechanical properties of aluminum alloy cable. Without high quality aluminum alloy rod, the basic quality of conductor cannot be changed no matter how to draw, twist, cable and armor in the latter process.
(2) insulation: there are three aspects about insulation; Cross - linking degree, stranded conductor, conductor cable annealing
(1) crosslinking degree; One of the advantages of aluminum alloy cable over copper cable is that all aluminum alloy cables are insulated by crosslinked polyethylene and the operating temperature of the cable is 90 degrees. Because of the use of crosslinked polyethylene insulation, there is a problem of crosslinking degree, formal professional aluminum alloy cable manufacturers should have a special crosslinking room.
(2) stranded conductor: according to the stranded conductor technology and the stranded conductor production line, the stranded conductor equipment in the domestic cable industry is basically the same. The stranded conductor usually produces aluminum chips and burrs, damages the insulation, affects the insulation effect, causes safety risks and shortenes the insulation life. Points is the most advanced stranded conductor device of motor type, PLC program control of nanotechnology stranded conductors and equipment, adopting the advanced process equipment, microcomputer control programming, innovation of the top nanotechnology, production of aluminum alloy conductor surface without aluminum, no burr, no pollution, no bumps, no scratch, no scratches, can most effectively to ensure no damage and cable insulation damage, ensure that the product service life and much higher than similar products.
(3) conductor cable forming annealing: generally, after conductor stranding, the internal stress existing in the stranding conductor will be applied on the insulation, causing long-term stress on the insulation, accelerating insulation aging, affecting the service life of the insulation, thus directly affecting the service life of the cable, which is the reason why the service life of copper cable is not long. Aluminum alloy production plants in the United States adopt the conductor forming annealing process to solve the problem of internal stress. The cable annealing technology can further improve the electrical and mechanical properties of the products, and eliminate the internal stress generated in the conductor stranding process, effectively ensuring the service life of the insulation. Therefore, it is necessary to see whether there is cable annealing technology and cable annealing equipment with conductor.
(3) armor: see if there is an advanced aluminum alloy interlocking armor equipment
The aluminum alloy armor made by many domestic manufacturers is not up to standard due to the poor equipment level and the substandard technology, so that the alloy belt is wider and the peak spacing of the armor is larger, which causes the cable to be rigid, inflexible in bending, easy to take off the armor, poor compression resistance and poor effect. At present, the most advanced aluminum alloy interlock armor equipment is Canada's KALMARK aluminum alloy interlock armor production line. The interlock armor produced by this equipment is of good tightness, interlocking and not easy to detach.
Due to the small spacing between the armor crest, the armor with the same distance has more stress points than other armor products, which can withstand greater pressure without causing damage to the cable core. Due to more peaks, smaller bending radius, better bending resistance. This kind of aluminum alloy armor can really meet the requirements of American standard for aluminum alloy armor.
2. Manufacturing equipment
Whether the enterprise has advanced aluminum alloy cable manufacturing equipment and technology equipment.
(1) continuous casting and rolling production line of aluminum alloy conductor rod
The key of aluminium alloy cable is the production of aluminium alloy conductor, so, when choosing manufacturer, want to look above all, have advanced aluminium alloy conductor rod material continuous casting continuous rolling production line.
The current domestic most advanced aluminum alloy conductor rod material production equipment is the Italian technology, continuous casting large cross-section other Italian imports of production lines (3807 was the biggest casting section of 2400 was only) of the continuous casting and rolling production line, 3807 aluminum alloy slab was filleting, large compression ratio for rough rolling, multi-channel time continuous rolling can get rod with moderate intensity, large volume density, conductivity best, various technical indicators are the most excellent aluminum alloy rod, the aluminium alloy rod material pull wire used aluminum alloy cable conductor of conductive wire core is the best product for cable superposition combination.
If a factory does not have the advanced continuous casting and rolling production line of aluminum alloy conductor rod, the quality of aluminum alloy conductor cannot be controlled from the production source, and the quality of aluminum alloy cable cannot be guaranteed!
(2) conductor stranded production line
At present, the stranded conductor produced by the stranded conductor production line of general domestic manufacturers will usually produce aluminum chips and burrs, which will damage the insulation, seriously affect the insulation effect, cause safety hazards and shorten the insulation life. At present domestic most advanced stranded conductors is the production line by motor, PLC program control of nanoscale stranding machine production line, using nanometer technology in the production of aluminum alloy conductor surface without aluminum, no burr, no pollution, no bumps, no scratch, no scratches, can most effectively guarantee cable insulation without any damage and destruction, ensure the service life of the product compared with similar products.
(3) aluminum alloy interlocking armor production line
Is one of the world's most advanced aluminum alloy interlocking armoring machine production line is the Canadian Karl mark (KALMARK) aluminum alloy interlocking armoring machine production line, the line is designed according to the technical standards development of aluminum alloy with armored cable chains, the interlocking between layer and layer of special structure can ensure cables subjected to the outside world strong external force damage, even though cable bigger pressure and external impact, armoured layer can also protect the electrical insulation properties.
The structure of aluminum alloy non-magnetic armor layer also effectively improves the flame retardant level of the cable, greatly reduces the damage of fire or fire to the cable, and greatly reduces the eddy current loss of the cable. Compared with steel tape armored structure, aluminum alloy tape armored structure has light weight, no eddy current loss, convenient laying, easy bending and no need of bridge installation, which can reduce 20% to 30% of installation cost and improve installation efficiency.
3. Test report
Whether the products of the enterprise have passed all kinds of tests and tests and certifications related to product characteristics, fire resistance, flame retardant, smoke toxicity, light transmittance and so on.
(1) three necessary technical reports: inspection report on aluminum alloy conductor materials, test report on compressive creep performance of aluminum alloy conductor and test report on 1000 thermal cycles of transition terminal. The first is the aluminum alloy conductor material whether to meet the AA8000 brand requirements of the chemical composition requirements of the report, the second is the aluminum alloy directly distinguish pure aluminum report, the third is the connection terminal reliability report, these three technical reports are qualified aluminum alloy cable must have.
(2) inspection report of aluminum alloy cable products issued by China national wire and cable testing center, state grid wuhan high voltage research institute and other national testing institutions.
(3) the inspection report on product fire resistance, flame retardant, smoke toxicity and light transmittance issued by the national fire prevention building materials quality supervision and inspection center.
(4) when choosing halogen-free and low-smoke products, special attention should be paid to the smoke toxicity and light transmittance test report issued by the national fire prevention building materials quality supervision and inspection center; At present, many domestic manufacturers so-called production of aluminum alloy cable halogen-free low smoke, and the actual product materials can not meet the requirements of halogen-free low smoke, this can be seen from the test report.
In the national standard (GB/ t20285-2006 material smoke toxicity risk classification) in the smoke toxicity testing safety level provisions; Smoke safety: AQ1>AQ2>ZA1>ZA2>ZA3>WX; Light transmittance should be greater than 60% where AQ: safe, ZA: safe and WX: dangerous.
Aluminum alloy products test results, only smoke toxicity index reached AQ level and light transmittance more than 60% is truly halogen free low smoke products, is truly safe and reliable, even if the cable is burned will not release toxic gas, laying, installation, use safety is high.
(5) as for other so-called evaluation reports, industry certificates, etc., in fact, some enterprises are playing virtual. Everybody knows, these things, it is the consultation that some industry branch does, intermediary orgnaization issues, want pay fee only, it is not difficult to get. These reports, certificates, etc., do not prove or prove anything about the quality of the product and are not enough for reference.
4. Independent intellectual property rights and technical patents
Aluminum alloy cable in the domestic new conductor material products, the current use of standard without special terms of aluminum alloy conductor material, in order to avoid material source technology, lead to aluminum alloy cable product performance, quality can't guarantee anything, choose the manufacturer must have the conductor material and manufacture technology of independent intellectual property rights patent certificate.
Whether has the core aluminum alloy conductor melting formula and the preparation of the patent technology and independent intellectual property rights, which reflects an enterprise has strong technical strength of the basic conditions. As we all know, without the core technology of aluminum conductor, it is difficult to guarantee that it is authentic aluminum cable no matter how loud the advertisement.
Having the core technology of invention patent aluminum alloy formula is the first premise of melting, casting billet and rolling rod in the first process of aluminum alloy conductor production. The patented formula of aluminum alloy material is the precondition for the high level aluminum alloy cable processing and manufacturing, the guarantee of the excellent quality of aluminum alloy cable, and the real technological advantage of an enterprise.
5. Quality control
Cable is the artery of energy transmission, which is related to the safe and stable operation of power transmission in an enterprise or even a region. Production of aluminum alloy cable products and production of copper cable in the production process is very different, the production of aluminum alloy cable, need a lot of professional testing equipment and improve the quality management system.
Each batch of aluminum alloy cable is the need to go through the production of each link for strict detection, inspection, can be factory. Visit a manufacturer attitude toward quality control, from the input of personnel, capital, institutions can see out, a professional manufacturer of aluminum alloy cable should be equipped with a special quality management office, laboratory chemical analysis laboratory, mechanical properties, physical properties of the laboratory, spectral analysis laboratory, electric laboratory performance and so on, excellent enterprise quality control, alloy aluminum liquid from smelting to continuous casting and rolling; From aluminum alloy rod wire drawing, tight stranding to conductor heat treatment; From the conductor insulation extrusion, crosslinking to the insulation core into a cable; Finally, every process of armor, sheath, routine test and package delivery has perfect and strict follow-up inspection, that is, control from the source to ensure that the finished cable produced has the highest quality.
The whole process quality control of the products is carried out, the time node is accurate to every minute and second, and the corresponding notes are made in the aluminum alloy cable structure to ensure the traceability of quality control of every inch of aluminum alloy cable.
One of the most important detection equipment is aluminum alloy conductor material detection equipment. Currently, the most advanced detection equipment for aluminum alloy conductor material in the world is Germany's full-spectrum direct-reading plasma emission spectrometer, which has the fastest detection speed and highest accuracy. The spectrometer is mainly used to detect the chemical composition of aluminum alloy and the crystal state of alloy. No advanced detection equipment is not able to ensure the quality of aluminum conductor!
6. Technical standards
Aluminum alloy cable has been reported to the competent national department for examination and approval of the national industry standard, if it is to participate in national standards, is specializing in the production of aluminum alloy cable companies at the same time, it must be inside the industry strength, influential leading enterprises, the United States is the invention to aluminum alloy cable, installation of aluminum alloy cable manufacturing technology and experience to lead the domestic more than 40 years, therefore, objectively speaking, the companies in the United States, especially the first brought into the aluminum alloy cable technology from the United States and USES the standard American manufacturing aluminum alloy cable manufacturers, security and reliability is more secure.
7. Customer cases
Aluminum alloy cable application range covers areas such as residential, commercial, industrial buildings, customer feedback is very has the reference value, should focus on understanding the customers to use aluminum alloy cable operation situation and situation of after-sales maintenance, if the customer's cable problems three days two head to manufacturer for after-sale maintenance, cable quality needs to be fastidious.
A quick way to judge aluminum cable manufacturers is to investigate the power design unit, if a power engineering consulting and design unit of its own building project power transmission are using aluminum cable, then the supplier and product must be through full and rigorous scientific demonstration, you can rest assured that the choice.
8. Value-added services
Domestic general enterprises are used for copper cable thinking to do aluminum cable, aluminum cable is only a variety of its product series, aluminum cable management is also the idea of copper cable, pure selling cable.
Now, with pure sell cable thinking to sell aluminum alloy cable has not meet the requirements of The Times and social development of production of aluminum alloy cable is a high technical threshold, a powerful aluminum alloy cable manufacturer, should not only be able to provide the best quality aluminum alloy cable products, should also be able to provide a complete set of cable transmission solutions, cable connection terminal solutions, and help customers to do the project technical solutions, the products whole life cycle cost analysis report, such as technology, business plan, help customer to provide cable selection, installation guide, additional value-added services, such as personnel training, running monitoring without professional strength, Without the importance of aluminum cable industry and prepared for the long-term service of aluminum cable users of the attitude of the enterprise is very difficult to do.
9. Field trip
Because domestic cable products are the implementation of the inspection system, the industry is common to the customer to see the samples without exception are commissioned by the gift company, the inspection agency issued the report is only negative to the sample sent for inspection