The hottest recycling of old cables in Dengfeng ci

2022-08-18
  • Detail

Free door-to-door evaluation of recycled old cables in Dengfeng City

free door-to-door evaluation of recycled old cables in Dengfeng City

source network release time: 4:12 this classification information is released by users

free door-to-door evaluation of recycled old cables in Dengfeng City. Baoding Xingchuang material and cable recycling company relies on its strong economic strength, adheres to the principle of honesty, and provides door-to-door recycling business, which directly saves time and effort for all enterprises. Our service tenet is: honest, fair and trustworthy. Establish good cooperative relations with manufacturers on the basis of reasonable price, equality and mutual benefit. The recycled old cables in Dengfeng City are divided into five categories:

1) bare wires - pure conductor metal, without insulation and sheath, such as steel cored aluminum stranded wires, electric locomotive wires, etc., and grounding flexible wires

2) power cable - it has insulation, armor and protective layer (less than five cores, complex structure). The product is mainly used for strong electric energy transmission in power generation, distribution, transmission, transformation and power supply lines, with large current (tens of amps to thousands of AMPS) and high voltage (220V to 500kV and above)

3) electrical equipment cables - there are many varieties and specifications, a wide range of applications, and the use voltage is 1kv or less, oil/cold/temperature/wear-resistant cables,/agricultural/mining cables, thin-walled wires, etc--- Our development direction

4) communication cables - from two core cables to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combined communication cables. The structure size of this kind of products is usually small and uniform, and the manufacturing accuracy is high

5 pairs of grade 2-4 reinforcement) electromagnetic wire - mainly used for various motors, instruments and meters

instructions for the use of recycled old cable products in Dengfeng City

1. The grounding of a spare core of the control cable

practice has proved that when a spare core of the control cable is grounded, the amplitude of the interference voltage can be reduced to 25~50, and the implementation is simple, while the cost of the cable increases very little

2. For circuits with serious consequences in case of electrical interference, do not share a control cable

including: (1) weak current signal control circuit and strong current signal control circuit; (2) Circuit of low-level signal and high-level signal; (3) The same control cable shall not be used for each phase weak current control circuit of AC circuit breaker in phase separation operation. However, if each pair of round-trip conductors of the weak current circuit belongs to a control cable that is not the same, it may form a ring arrangement during laying, and the potential will be induced under the cross chain of the electromagnetic lines of the similar power supply. Its value may have a great impact on the parameter interference of the low level of the weak current circuit, so it is advisable to share a control cable for the round-trip conductors

3. LSB co 20a gb11945 metal shielding and shielding layer grounding

metal shielding is an important measure to weaken and prevent electrical interference, including total shielding, sub shielding and double-layer total shielding of wire cores. The selection of metal shielding type of control cable shall include comprehensive interference suppression measures according to the strength of possible electrical interference, so as to meet the requirements of reducing interference and overvoltage. The higher the requirements for anti-interference effect, the greater the corresponding investment. When steel tape armor and steel wire braided total shielding are used, the price of the cable will increase by about 10~20

when Dengfeng recycles old cables and has doubts about the sealing of oil paper insulated power cables, how to check whether the cable insulation paper is damp by a simpler method? Answer: Ignite the cable insulation paper or put it into the cable oil at about 150 ℃ for inspection. If there is no "hissing" sound or white foam, it means that it is not damp. What should be indicated on the cable signboard? What are the requirements for compilation? Answer: the cable route design number, cable model, specification and starting point should be indicated on the sign board, and the cables used in parallel should have sequence number. The handwriting shall be clear and not easy to fall off. Where should the orientation marks of directly buried cables be set? Answer: at both ends of the cable, the cable joint at 50~100m of the straight section of the cable is several bends where the cable changes direction. How to remove the moisture before the construction of yellow wax ribbon, black glass paint ribbon, alkali free glass ribbon, etc. used for making cable joints? Answer: (1) constant temperature drying method: roll the insulating tape into small rolls with a diameter of 25~30mm, put it into a constant temperature drying oven at 110~120 ℃ for 4~5h, cool it and dry it, take it out, and put it into a dry sealed cylinder. (2) Oil immersion method: put the small roll of insulating tape into the cable oil with a constant temperature of 120~130 ℃, keep a distance of 30mm from the bottom of the pot, take it out after a certain period of time when the oil surface no longer produces foam, and put it into the barrel storing cable oil. The oil level should exceed all the objects loaded and seal it. What is the function of cable sheath? Answer: protect the inner protective layer from mechanical damage and chemical corrosion, and enhance the mechanical strength

structure of Dengfeng recycled old cable products 1. Structure composition of mineral insulated cable:

mineral insulated cable is composed of copper conductor with high conductivity, inorganic magnesium oxide insulation and seamless copper tube sheath

2. Working temperature of mineral insulated cable:

the continuous working temperature of mineral insulated cable is 250 ℃; It can work close to the melting point of copper at 1083 ℃ in a short time or an extraordinary period (the melting point of magnesium oxide is 2800 ℃); The power supply can last for 3 hours at 950 ℃ -1000 ℃

3. Characteristics of mineral insulated cable:

1) fire resistance:

copper and magnesium oxide, two materials used in mineral insulated cables, are inorganic. This kind of cable will not burn or support combustion, and it can still continue to operate when it is close to the flame. The copper sheath melts at 1083 ℃, while the magnesium oxide insulating material solidifies at 2800 ℃

2) high operating temperature

mineral insulated cable can withstand continuous operating temperature up to 250 ℃. However, in an emergency, the cable can continue to operate for a short time at a temperature close to the melting point of the copper sheath

repair and maintenance of recycled old cable products in Dengfeng City:

the formula for controlling cable price is as follows: copper weight x copper price = (wire diameter ÷ 2) ^2x3.14x number of wires x8.9x processing fee of copper price 10 at that time

calculation of the cost price of the control cable for the recycling of old cables in Dengfeng City

square x1.83= the weight of copper x the price of copper armor at that time (weight x0.4 yuan/Jin) = the processing fee of the cost price 10

the price of the cable = the cost of manufacturing materials, fixed expenses, tax business expenses, profits

the cost of manufacturing materials = the cost of materials * (1 material consumption) (the material cost is the value that the theory facilitates the conduct of batch experiments; the calculated value)

fixed costs vary according to the situation of each company, generally including production wages, management wages, utilities, repair fees, depreciation fees, rent fees, transportation costs

common faults of control cable lines include mechanical damage, insulation damage, insulation moisture, insulation aging and deterioration, overvoltage, cable overheating faults, etc. When the above faults occur in the line, the power supply of the faulty cable should be cut off, the fault point should be found, the fault should be checked and analyzed, and then the repair and test should be carried out. The cut-out can be restored only after the fault is eliminated, and the power supply should be restored in May (6)

Copyright © 2011 JIN SHI